from pathlib import Path
from datetime import datetime, timezone
import hashlib
import hmac
import json
import os
import secrets
from uuid import UUID, uuid4

import psycopg
from psycopg.types.json import Jsonb

from fastapi import FastAPI, Header, Request
from pydantic import BaseModel
from fastapi.responses import FileResponse


LOG_PATH = Path("activation.log")
DATABASE_URL = os.environ.get("TUXFLOTTE_DATABASE_URL")
AGENT_POLL_INTERVAL_SECONDS = int(os.environ.get("TUXFLOTTE_AGENT_POLL_INTERVAL", "300"))
ANSIBLE_CONTENT_REPO = os.environ.get("TUXFLOTTE_ANSIBLE_CONTENT_REPO", "")
ADMIN_TOKEN = os.environ.get("TUXFLOTTE_ADMIN_TOKEN", "")
KUNDENPLATTFORM_TOKEN = os.environ.get("TUXFLOTTE_KUNDENPLATTFORM_TOKEN", "")
AGENT_REPORTABLE_EVENT_TYPES = {"applied", "apply_failed", "removed", "remove_failed"}
app = FastAPI(title="Provisioning Activation Server", version="0.1.0")


class ActivationRequest(BaseModel):
    activation_code: str
    device_fingerprint: str
    hostname: str | None = None
    machine_id: str | None = None
    client_version: str | None = None
    hardware: dict


class ResolveRequest(BaseModel):
    device_id: str


class AgentBootstrapRequest(BaseModel):
    device_id: str


class AgentCheckinRequest(BaseModel):
    device_id: str


class AgentReportEntry(BaseModel):
    merkmal: str
    event_type: str
    detail: dict | None = None


class AgentReportRequest(BaseModel):
    device_id: str
    results: list[AgentReportEntry]


class AuftragSelectRequest(BaseModel):
    optionen: dict = {}


class CreateOrganizationRequest(BaseModel):
    name: str


class UpdateOrganizationRequest(BaseModel):
    name: str


class CreateMerkmalRequest(BaseModel):
    key: str
    name: str
    description: str | None = None


class UpdateMerkmalRequest(BaseModel):
    name: str
    description: str | None = None
    kategorie_id: str | None = None
    im_auftragskatalog: bool = False


class CreateKategorieRequest(BaseModel):
    key: str
    name: str
    description: str | None = None
    sort_order: int = 0


class CreateWorkspaceRequest(BaseModel):
    key: str
    name: str
    description: str | None = None
    organization_id: str | None = None


class CreateEnrollmentSessionRequest(BaseModel):
    bereitstellungsvorlage_id: str
    max_devices: int
    expires_at: str


def write_log(entry: dict) -> None:
    with LOG_PATH.open("a", encoding="utf-8") as f:
        f.write(json.dumps(entry, ensure_ascii=False) + "\n")

def get_database_connection():
    if not DATABASE_URL:
        raise RuntimeError("TUXFLOTTE_DATABASE_URL ist nicht gesetzt.")

    return psycopg.connect(DATABASE_URL)

def load_or_create_device(
    organization_id,
    device_fingerprint: str,
    hostname: str | None,
) -> tuple[dict, bool]:
    """
    Lädt ein bekanntes Gerät oder legt es neu an.

    Rückgabe:
        (device, created)
    """

    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                SELECT
                    id,
                    organization_id,
                    device_fingerprint,
                    hostname,
                    created_at,
                    last_seen
                FROM devices
                WHERE device_fingerprint = %s
                """,
                (device_fingerprint,),
            )

            row = cur.fetchone()

            if row is not None:
                if str(row[1]) != str(organization_id):
                    raise RuntimeError(
                    "Das Gerät ist bereits einer anderen Organization zugeordnet."
                    )
                cur.execute(
                    """
                    UPDATE devices
                    SET
                        hostname = %s,
                        last_seen = CURRENT_TIMESTAMP
                    WHERE id = %s
                    RETURNING
                        id,
                        organization_id,
                        device_fingerprint,
                        hostname,
                        created_at,
                        last_seen
                    """,
                    (hostname, row[0]),
                )

                row = cur.fetchone()
                created = False
            else:
                device_id = uuid4()

                cur.execute(
                    """
                    INSERT INTO devices (
                        id,
                        organization_id,
                        device_fingerprint,
                        hostname
                    )
                    VALUES (%s, %s, %s, %s)
                    RETURNING
                        id,
                        organization_id,
                        device_fingerprint,
                        hostname,
                        created_at,
                        last_seen
                    """,
                    (
                        device_id,
                        organization_id,
                        device_fingerprint,
                        hostname,
                    ),
                )

                row = cur.fetchone()
                created = True

    device = {
        "id": str(row[0]),
        "organization_id": str(row[1]),
        "device_fingerprint": row[2],
        "hostname": row[3],
        "created_at": row[4].isoformat(),
        "last_seen": row[5].isoformat(),
    }

    return device, created

def store_hardware_snapshot(
    device_id: str,
    hardware: dict,
) -> str:
    snapshot_id = uuid4()

    identity = hardware.get("identity", {})
    system = hardware.get("system", {})
    mainboard = hardware.get("mainboard", {})
    firmware = hardware.get("firmware", {})
    security = hardware.get("security", {})
    cpu = system.get("cpu", {})

    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                INSERT INTO hardware_snapshots (
                    id,
                    device_id,
                    architecture,
                    manufacturer,
                    product_name,
                    product_version,
                    system_uuid,
                    system_serial,
                    board_vendor,
                    board_name,
                    board_serial,
                    bios_vendor,
                    bios_version,
                    boot_mode,
                    secure_boot,
                    tpm_version,
                    cpu_model,
                    cpu_logical_count,
                    memory_bytes
                )
                VALUES (
                    %s, %s, %s, %s, %s,
                    %s, %s, %s, %s, %s,
                    %s, %s, %s, %s, %s,
                    %s, %s, %s, %s
                )
                """,
                (
                    snapshot_id,
                    device_id,
                    system["architecture"],
                    system.get("manufacturer"),
                    system.get("product_name"),
                    system.get("product_version"),
                    identity.get("system_uuid"),
                    identity.get("system_serial"),
                    mainboard.get("vendor"),
                    mainboard.get("name"),
                    identity.get("board_serial"),
                    firmware.get("bios_vendor"),
                    firmware.get("bios_version"),
                    firmware.get("boot_mode"),
                    firmware.get("secure_boot"),
                    security.get("tpm_version"),
                    cpu.get("model"),
                    cpu.get("logical_count"),
                    system.get("memory_bytes"),
                ),
            )

            for interface in hardware.get("network_interfaces", []):
                cur.execute(
                    """
                    INSERT INTO network_interfaces (
                        id,
                        hardware_snapshot_id,
                        name,
                        type,
                        mac_address
                    )
                    VALUES (%s, %s, %s, %s, %s)
                    """,
                    (
                        uuid4(),
                        snapshot_id,
                        interface["name"],
                        interface["type"],
                        interface["mac"],
                    ),
                )

            for storage_device in hardware.get("storage_devices", []):
                cur.execute(
                    """
                    INSERT INTO storage_devices (
                        id,
                        hardware_snapshot_id,
                        name,
                        model,
                        serial,
                        size_bytes,
                        transport
                    )
                    VALUES (%s, %s, %s, %s, %s, %s, %s)
                    """,
                    (
                        uuid4(),
                        snapshot_id,
                        storage_device["name"],
                        storage_device.get("model"),
                        storage_device.get("serial"),
                        storage_device["size_bytes"],
                        storage_device.get("transport"),
                    ),
                )

    return str(snapshot_id)

def find_activation_code(code: str):
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                SELECT ac.organization_id, o.name
                FROM activation_codes ac
                JOIN organizations o ON o.id = ac.organization_id
                WHERE ac.code = %s AND ac.active
                """,
                (code,),
            )
            row = cur.fetchone()

    if row is None:
        return None

    return {"organization_id": str(row[0]), "organization_name": row[1]}

def find_enrollment_session(code: str):
    """
    Enrollment Sessions haben kein eigenes code-Feld - ihre id dient direkt
    als Bearer-Credential (unratbare UUID, siehe migrations/0012). Nur
    gültige Sessions (nicht widerrufen, nicht abgelaufen, Kontingent nicht
    erschöpft) werden zurückgegeben; jede andere Bedingung lässt /activate
    denselben "invalid_activation_code"-Fehlschlag melden wie ein
    ungültiger klassischer Aktivierungscode - das bricht den Installer
    bereits beim Server-Handshake (Schritt 15) ab, lange vor jeder
    destruktiven Aktion (siehe ADR-0008).
    """

    try:
        session_id = UUID(code)
    except ValueError:
        return None

    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                SELECT es.id, es.organization_id, o.name, es.bereitstellungsvorlage_id,
                       es.max_devices, es.devices_used, es.expires_at, es.revoked_at
                FROM enrollment_sessions es
                JOIN organizations o ON o.id = es.organization_id
                WHERE es.id = %s
                """,
                (session_id,),
            )
            row = cur.fetchone()

    if row is None:
        return None

    (
        session_id, organization_id, organization_name, bereitstellungsvorlage_id,
        max_devices, devices_used, expires_at, revoked_at,
    ) = row

    if revoked_at is not None:
        return None
    if expires_at <= datetime.now(timezone.utc):
        return None
    if devices_used >= max_devices:
        return None

    return {
        "session_id": str(session_id),
        "organization_id": str(organization_id),
        "organization_name": organization_name,
        "bereitstellungsvorlage_id": str(bereitstellungsvorlage_id),
    }

def consume_enrollment_session(session_id: str) -> None:
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "UPDATE enrollment_sessions SET devices_used = devices_used + 1 WHERE id = %s",
                (session_id,),
            )

def fetch_templates(organization_id: str) -> list[dict]:
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                SELECT
                    bv.id, bv.label, bv.is_default,
                    w.id, w.name,
                    b.id, b.name, b.version
                FROM bereitstellungsvorlagen bv
                JOIN workspaces w ON w.id = bv.workspace_id
                JOIN backends b ON b.id = bv.backend_id
                WHERE bv.organization_id = %s
                ORDER BY bv.is_default DESC, bv.label
                """,
                (organization_id,),
            )
            rows = cur.fetchall()

    return [
        {
            "id": str(row[0]),
            "label": row[1],
            "workspace": {"id": str(row[3]), "name": row[4]},
            "backend": {"id": str(row[5]), "name": row[6], "version": row[7]},
            "is_default": row[2],
        }
        for row in rows
    ]

def require_service_token(authorization: str | None) -> bool:
    """
    Akzeptiert entweder den Betreiber-Admin-Token oder das separate
    Kundenplattform-Service-Token (siehe ADR-0011) - beide dürfen die
    Auftragskatalog-Endpoints aufrufen, Kompromittierung/Rotation des einen
    betrifft den anderen nicht.
    """

    if authorization is None or not authorization.startswith("Bearer "):
        return False

    provided_token = authorization.removeprefix("Bearer ")

    if ADMIN_TOKEN and hmac.compare_digest(provided_token, ADMIN_TOKEN):
        return True

    if KUNDENPLATTFORM_TOKEN and hmac.compare_digest(provided_token, KUNDENPLATTFORM_TOKEN):
        return True

    return False

def hash_agent_secret(secret: str) -> str:
    return hashlib.sha256(secret.encode("utf-8")).hexdigest()

def verify_agent_secret(device_id: str, provided_secret: str) -> bool:
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "SELECT agent_secret_hash FROM devices WHERE id = %s",
                (device_id,),
            )
            row = cur.fetchone()

    if row is None or row[0] is None:
        return False

    return hmac.compare_digest(row[0], hash_agent_secret(provided_secret))

def fetch_assigned_blueprints(device_id: str):
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                SELECT bv.workspace_id, bv.backend_id
                FROM assignments a
                JOIN bereitstellungsvorlagen bv ON bv.id = a.bereitstellungsvorlage_id
                WHERE a.device_id = %s
                """,
                (device_id,),
            )
            assignment_row = cur.fetchone()

            if assignment_row is None:
                return []

            workspace_id, backend_id = assignment_row

            cur.execute(
                """
                SELECT m.key, bp.ansible_role
                FROM workspace_merkmale wm
                JOIN merkmale m ON m.id = wm.merkmal_id
                JOIN blueprints bp ON bp.merkmal_id = m.id AND bp.backend_id = %s
                WHERE wm.workspace_id = %s
                """,
                (backend_id, workspace_id),
            )
            return [
                {"merkmal": key, "ansible_role": ansible_role}
                for key, ansible_role in cur.fetchall()
            ]

def fetch_auftragskatalog_state(device_id: str):
    """
    Voller Soll-Zustand (present/absent) aller katalogfähigen Merkmale für
    das Backend des Device (siehe ADR-0010). Zustandslos aus der aktuellen
    Auswahl abgeleitet, keine Historie nötig.

    Default ohne explizite Auftragszuweisung ist die Workspace-Zugehörigkeit:
    der Auftragskatalog besteht aus denselben Merkmalen, aus denen auch
    Workspaces zusammengesetzt werden, und ein Workspace ist fachlich nichts
    anderes als eine Vorauswahl aus dem Katalog. Eine vorhandene
    device_merkmale-Zeile überschreibt diesen Default in beide Richtungen
    (auch ein workspace-komponiertes Merkmal lässt sich damit geräteweise
    abwählen).
    """

    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                SELECT bv.workspace_id, bv.backend_id
                FROM assignments a
                JOIN bereitstellungsvorlagen bv ON bv.id = a.bereitstellungsvorlage_id
                WHERE a.device_id = %s
                """,
                (device_id,),
            )
            assignment_row = cur.fetchone()

            if assignment_row is None:
                return []

            workspace_id, backend_id = assignment_row

            cur.execute(
                """
                SELECT m.key, bp.ansible_role,
                       COALESCE(dm.aktiv, wm.merkmal_id IS NOT NULL),
                       COALESCE(dm.optionen, '{}'::jsonb)
                FROM merkmale m
                JOIN blueprints bp ON bp.merkmal_id = m.id AND bp.backend_id = %s
                LEFT JOIN device_merkmale dm
                    ON dm.merkmal_id = m.id AND dm.device_id = %s
                LEFT JOIN workspace_merkmale wm
                    ON wm.merkmal_id = m.id AND wm.workspace_id = %s
                WHERE m.im_auftragskatalog
                """,
                (backend_id, device_id, workspace_id),
            )
            return [
                {
                    "merkmal": key,
                    "ansible_role": ansible_role,
                    "state": "present" if aktiv else "absent",
                    "optionen": optionen,
                }
                for key, ansible_role, aktiv, optionen in cur.fetchall()
            ]

def fetch_auftragskatalog_listing(device_id: str):
    """
    Wie fetch_auftragskatalog_state, aber für die Auswahl-API angereichert um
    Anzeige-relevante Felder (Name, Beschreibung, Kategorie) statt nur die
    für den Agenten nötigen (Rollenname, State).
    """

    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                SELECT bv.workspace_id, bv.backend_id
                FROM assignments a
                JOIN bereitstellungsvorlagen bv ON bv.id = a.bereitstellungsvorlage_id
                WHERE a.device_id = %s
                """,
                (device_id,),
            )
            assignment_row = cur.fetchone()

            if assignment_row is None:
                return None

            workspace_id, backend_id = assignment_row

            cur.execute(
                """
                SELECT m.key, m.name, m.description,
                       k.key, k.name, k.sort_order,
                       COALESCE(dm.aktiv, wm.merkmal_id IS NOT NULL),
                       COALESCE(dm.optionen, '{}'::jsonb)
                FROM merkmale m
                JOIN blueprints bp ON bp.merkmal_id = m.id AND bp.backend_id = %s
                LEFT JOIN kategorien k ON k.id = m.kategorie_id
                LEFT JOIN device_merkmale dm
                    ON dm.merkmal_id = m.id AND dm.device_id = %s
                LEFT JOIN workspace_merkmale wm
                    ON wm.merkmal_id = m.id AND wm.workspace_id = %s
                WHERE m.im_auftragskatalog
                ORDER BY k.sort_order NULLS LAST, m.name
                """,
                (backend_id, device_id, workspace_id),
            )
            return [
                {
                    "merkmal": key,
                    "name": name,
                    "description": description,
                    "kategorie": (
                        {"key": kat_key, "name": kat_name, "sort_order": sort_order}
                        if kat_key is not None else None
                    ),
                    "state": "present" if aktiv else "absent",
                    "optionen": optionen,
                }
                for (
                    key, name, description,
                    kat_key, kat_name, sort_order,
                    aktiv, optionen,
                ) in cur.fetchall()
            ]

def set_auftrag_selection(device_id: str, merkmal_key: str, aktiv: bool, optionen: dict):
    """
    Setzt die geräteweise Auswahl eines katalogfähigen Merkmals (Upsert in
    device_merkmale) und protokolliert die Änderung als selected/deselected-
    Event. Gibt False zurück, wenn kein katalogfähiges Merkmal mit diesem Key
    existiert (unbekannter Key oder im_auftragskatalog = false).
    """

    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "SELECT id FROM merkmale WHERE key = %s AND im_auftragskatalog",
                (merkmal_key,),
            )
            merkmal_row = cur.fetchone()

            if merkmal_row is None:
                return False

            merkmal_id = merkmal_row[0]

            cur.execute(
                """
                INSERT INTO device_merkmale (id, device_id, merkmal_id, aktiv, optionen)
                VALUES (%s, %s, %s, %s, %s)
                ON CONFLICT (device_id, merkmal_id) DO UPDATE
                    SET aktiv = EXCLUDED.aktiv,
                        optionen = EXCLUDED.optionen,
                        updated_at = CURRENT_TIMESTAMP
                """,
                (uuid4(), device_id, merkmal_id, aktiv, Jsonb(optionen)),
            )

            cur.execute(
                """
                INSERT INTO device_merkmal_events (id, device_id, merkmal_id, event_type)
                VALUES (%s, %s, %s, %s)
                """,
                (uuid4(), device_id, merkmal_id, "selected" if aktiv else "deselected"),
            )

    return True

def fetch_devices_for_organization(organization_id: str):
    """
    Für Kundenplattforms Geräteliste + Besitz-Validierung (siehe ADR-0011):
    alle Geräte einer Organisation, unabhängig von Bereitstellungsvorlagen-
    Zuweisung.
    """

    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                SELECT id, hostname, device_fingerprint, agent_last_checkin
                FROM devices
                WHERE organization_id = %s
                ORDER BY hostname NULLS LAST, created_at
                """,
                (organization_id,),
            )
            return [
                {
                    "id": str(device_id),
                    "hostname": hostname,
                    "device_fingerprint": fingerprint,
                    "agent_last_checkin": (
                        last_checkin.isoformat() if last_checkin is not None else None
                    ),
                }
                for device_id, hostname, fingerprint, last_checkin in cur.fetchall()
            ]

def fetch_all_devices():
    """
    Organisationsübergreifende Geräteliste für den Kundenplattform-Admin-
    Bereich (Verwaltung -> Geräte) - Pendant zu fetch_devices_for_organization,
    ohne Org-Filter, mit Organisationsname gejoint.
    """

    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                SELECT d.id, d.hostname, d.device_fingerprint, d.agent_last_checkin,
                       d.organization_id, o.name
                FROM devices d
                JOIN organizations o ON o.id = d.organization_id
                ORDER BY o.name, d.hostname NULLS LAST, d.created_at
                """
            )
            return [
                {
                    "id": str(device_id),
                    "hostname": hostname,
                    "device_fingerprint": fingerprint,
                    "agent_last_checkin": (
                        last_checkin.isoformat() if last_checkin is not None else None
                    ),
                    "organization_id": str(organization_id),
                    "organization_name": organization_name,
                }
                for (
                    device_id, hostname, fingerprint, last_checkin,
                    organization_id, organization_name,
                ) in cur.fetchall()
            ]

def fetch_organizations():
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "SELECT id, name, created_at FROM organizations ORDER BY name"
            )
            return [
                {"id": str(org_id), "name": name, "created_at": created_at.isoformat()}
                for org_id, name, created_at in cur.fetchall()
            ]

def create_organization(name: str):
    organization_id = uuid4()

    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "INSERT INTO organizations (id, name) VALUES (%s, %s)",
                (organization_id, name),
            )

    return {"id": str(organization_id), "name": name}

def update_organization(organization_id: str, name: str):
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "UPDATE organizations SET name = %s WHERE id = %s RETURNING id, name",
                (name, organization_id),
            )
            row = cur.fetchone()

    if row is None:
        return None

    return {"id": str(row[0]), "name": row[1]}

def fetch_activation_codes(organization_id: str):
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                SELECT code, active, created_at
                FROM activation_codes
                WHERE organization_id = %s
                ORDER BY created_at DESC
                """,
                (organization_id,),
            )
            return [
                {"code": code, "active": active, "created_at": created_at.isoformat()}
                for code, active, created_at in cur.fetchall()
            ]

def create_activation_code(organization_id: str):
    code = "-".join(
        secrets.token_hex(3).upper()[i:i + 3] for i in range(0, 6, 3)
    )

    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "INSERT INTO activation_codes (code, organization_id) VALUES (%s, %s)",
                (code, organization_id),
            )

    return {"code": code, "active": True}

def fetch_merkmale():
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                SELECT m.id, m.key, m.name, m.description, m.im_auftragskatalog,
                       m.kategorie_id, k.name
                FROM merkmale m
                LEFT JOIN kategorien k ON k.id = m.kategorie_id
                ORDER BY m.key
                """
            )
            return [
                {
                    "id": str(mid),
                    "key": key,
                    "name": name,
                    "description": description,
                    "im_auftragskatalog": im_auftragskatalog,
                    "kategorie_id": str(kategorie_id) if kategorie_id else None,
                    "kategorie_name": kategorie_name,
                }
                for (
                    mid, key, name, description, im_auftragskatalog,
                    kategorie_id, kategorie_name,
                ) in cur.fetchall()
            ]

def create_merkmal(key: str, name: str, description: str | None):
    merkmal_id = uuid4()

    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "INSERT INTO merkmale (id, key, name, description) VALUES (%s, %s, %s, %s)",
                (merkmal_id, key, name, description),
            )

    return {"id": str(merkmal_id), "key": key, "name": name}

def update_merkmal(merkmal_id: str, name: str, description: str | None, kategorie_id: str | None, im_auftragskatalog: bool):
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                UPDATE merkmale
                SET name = %s, description = %s, kategorie_id = %s, im_auftragskatalog = %s
                WHERE id = %s
                RETURNING id
                """,
                (name, description, kategorie_id, im_auftragskatalog, merkmal_id),
            )
            return cur.fetchone() is not None

def fetch_kategorien():
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "SELECT id, key, name, description, sort_order FROM kategorien ORDER BY sort_order, name"
            )
            return [
                {
                    "id": str(kid),
                    "key": key,
                    "name": name,
                    "description": description,
                    "sort_order": sort_order,
                }
                for kid, key, name, description, sort_order in cur.fetchall()
            ]

def create_kategorie(key: str, name: str, description: str | None, sort_order: int):
    kategorie_id = uuid4()

    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                INSERT INTO kategorien (id, key, name, description, sort_order)
                VALUES (%s, %s, %s, %s, %s)
                """,
                (kategorie_id, key, name, description, sort_order),
            )

    return {"id": str(kategorie_id), "key": key, "name": name}

def fetch_workspaces():
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                SELECT w.id, w.key, w.name, w.description, w.organization_id, o.name
                FROM workspaces w
                LEFT JOIN organizations o ON o.id = w.organization_id
                ORDER BY o.name NULLS FIRST, w.name
                """
            )
            return [
                {
                    "id": str(wid),
                    "key": key,
                    "name": name,
                    "description": description,
                    "organization_id": str(organization_id) if organization_id else None,
                    "organization_name": organization_name,
                }
                for (
                    wid, key, name, description, organization_id, organization_name,
                ) in cur.fetchall()
            ]

def create_workspace(key: str, name: str, description: str | None, organization_id: str | None):
    workspace_id = uuid4()

    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                INSERT INTO workspaces (id, organization_id, key, name, description)
                VALUES (%s, %s, %s, %s, %s)
                """,
                (workspace_id, organization_id, key, name, description),
            )

    return {"id": str(workspace_id), "key": key, "name": name}

def fetch_workspace_detail(workspace_id: str):
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                SELECT w.id, w.key, w.name, w.description, w.organization_id, o.name
                FROM workspaces w
                LEFT JOIN organizations o ON o.id = w.organization_id
                WHERE w.id = %s
                """,
                (workspace_id,),
            )
            row = cur.fetchone()

            if row is None:
                return None

            cur.execute(
                """
                SELECT m.id, m.key, m.name
                FROM workspace_merkmale wm
                JOIN merkmale m ON m.id = wm.merkmal_id
                WHERE wm.workspace_id = %s
                ORDER BY m.key
                """,
                (workspace_id,),
            )
            merkmale = [
                {"id": str(mid), "key": key, "name": name}
                for mid, key, name in cur.fetchall()
            ]

    return {
        "id": str(row[0]),
        "key": row[1],
        "name": row[2],
        "description": row[3],
        "organization_id": str(row[4]) if row[4] else None,
        "organization_name": row[5],
        "merkmale": merkmale,
    }

def add_merkmal_to_workspace(workspace_id: str, merkmal_id: str):
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                INSERT INTO workspace_merkmale (workspace_id, merkmal_id)
                VALUES (%s, %s)
                ON CONFLICT DO NOTHING
                """,
                (workspace_id, merkmal_id),
            )

def remove_merkmal_from_workspace(workspace_id: str, merkmal_id: str):
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "DELETE FROM workspace_merkmale WHERE workspace_id = %s AND merkmal_id = %s",
                (workspace_id, merkmal_id),
            )

def fetch_backends():
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute("SELECT id, key, name, installer_type, version FROM backends ORDER BY key")
            return [
                {"id": str(bid), "key": key, "name": name, "installer_type": installer_type, "version": version}
                for bid, key, name, installer_type, version in cur.fetchall()
            ]

def fetch_blueprints():
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                SELECT m.key, b.key, bp.ansible_role
                FROM blueprints bp
                JOIN merkmale m ON m.id = bp.merkmal_id
                JOIN backends b ON b.id = bp.backend_id
                ORDER BY m.key, b.key
                """
            )
            return [
                {"merkmal": merkmal_key, "backend": backend_key, "ansible_role": ansible_role}
                for merkmal_key, backend_key, ansible_role in cur.fetchall()
            ]

def fetch_unassigned_devices(organization_id: str):
    """
    Geräte einer Organisation ohne Bereitstellungsvorlagen-Zuweisung - die
    Kandidaten für die Neugerät-Bestätigung (ADR-0008) im Flows-Bereich.
    """

    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                SELECT d.id, d.hostname, d.device_fingerprint, d.created_at
                FROM devices d
                LEFT JOIN assignments a ON a.device_id = d.id
                WHERE d.organization_id = %s AND a.id IS NULL
                ORDER BY d.created_at
                """,
                (organization_id,),
            )
            return [
                {
                    "id": str(device_id),
                    "hostname": hostname,
                    "device_fingerprint": fingerprint,
                    "created_at": created_at.isoformat(),
                }
                for device_id, hostname, fingerprint, created_at in cur.fetchall()
            ]

def fetch_enrollment_sessions(organization_id: str):
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                SELECT es.id, bv.label, es.max_devices, es.devices_used,
                       es.expires_at, es.revoked_at, es.created_at
                FROM enrollment_sessions es
                JOIN bereitstellungsvorlagen bv ON bv.id = es.bereitstellungsvorlage_id
                WHERE es.organization_id = %s
                ORDER BY es.created_at DESC
                """,
                (organization_id,),
            )
            return [
                {
                    "id": str(sid),
                    "bereitstellungsvorlage_label": label,
                    "max_devices": max_devices,
                    "devices_used": devices_used,
                    "expires_at": expires_at.isoformat(),
                    "revoked_at": revoked_at.isoformat() if revoked_at else None,
                    "created_at": created_at.isoformat(),
                }
                for (
                    sid, label, max_devices, devices_used,
                    expires_at, revoked_at, created_at,
                ) in cur.fetchall()
            ]

def create_enrollment_session(organization_id: str, bereitstellungsvorlage_id: str, max_devices: int, expires_at: str):
    session_id = uuid4()

    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                INSERT INTO enrollment_sessions
                    (id, organization_id, bereitstellungsvorlage_id, max_devices, expires_at)
                VALUES (%s, %s, %s, %s, %s)
                """,
                (session_id, organization_id, bereitstellungsvorlage_id, max_devices, expires_at),
            )

    return {"id": str(session_id)}

def revoke_enrollment_session(session_id: str):
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                UPDATE enrollment_sessions
                SET revoked_at = CURRENT_TIMESTAMP
                WHERE id = %s AND revoked_at IS NULL
                RETURNING id
                """,
                (session_id,),
            )
            return cur.fetchone() is not None

@app.get("/health")
def health():
    return {
        "status": "ok",
        "service": "provisioning-server",
        "version": "0.1.0"
    }


@app.post("/api/v1/activate")
def activate(payload: ActivationRequest, request: Request):
    # Enrollment Sessions zuerst versuchen (Auto-Modus-ISOs, siehe
    # tuxflotte-installer Phase 2/3) - ihre id ist selbst der Code, kollidiert
    # nicht mit klassischen Aktivierungscodes (eigene, meist sprechende
    # Strings wie "LAB-2026-START"). Fällt bei Nicht-UUID sofort auf den
    # klassischen Pfad zurück.
    enrollment_session = find_enrollment_session(payload.activation_code)
    activation = None

    if enrollment_session is not None:
        organization_id = enrollment_session["organization_id"]
        organization_name = enrollment_session["organization_name"]
        success = True
    else:
        activation = find_activation_code(payload.activation_code)
        success = activation is not None

        if success:
            organization_id = activation["organization_id"]
            organization_name = activation["organization_name"]

    device = None
    device_created = False
    hardware_snapshot_id = None

    if success:
        device, device_created = load_or_create_device(
            organization_id,
            payload.device_fingerprint,
            payload.hostname,
        )
        hardware_snapshot_id = store_hardware_snapshot(
            device["id"],
            payload.hardware,
        )

        if enrollment_session is not None:
            consume_enrollment_session(enrollment_session["session_id"])

    write_log({
        "timestamp": datetime.now(timezone.utc).isoformat(),
        "event": "activate",
        "success": success,
        "remote_ip": request.client.host if request.client else None,
        "activation_code": payload.activation_code,
        "hostname": payload.hostname,
        "machine_id": payload.machine_id,
        "client_version": payload.client_version
    })

    if not success:
        return {
            "success": False,
            "error": "invalid_activation_code",
            "message": "Der Aktivierungscode ist ungültig."
        }

    if enrollment_session is not None:
        # Die Bereitstellungsvorlage steht durch die Enrollment Session schon
        # fest - nicht die volle Organisationsliste zurückgeben (20_profile_
        # selection.sh würde im Auto-Modus sonst nichts Eindeutiges zum
        # Auswählen haben), sondern nur diese eine, als is_default markiert
        # (dieselbe Erkennung, die der Installer schon für den regulären
        # Standard-Vorlagen-Fall benutzt - keine Installer-Änderung nötig).
        templates = [
            {**template, "is_default": True}
            for template in fetch_templates(organization_id)
            if template["id"] == enrollment_session["bereitstellungsvorlage_id"]
        ]
    else:
        templates = fetch_templates(organization_id)

    return {
        "success": True,

        "device": {
            "id": device["id"],
            "fingerprint": device["device_fingerprint"],
            "hostname": device["hostname"],
            "registration_status": (
                "registered"
                if device_created
                else "existing"
            ),
            "hardware_snapshot_id": hardware_snapshot_id,
        },

        "customer": {
            "id": organization_id,
            "organization_id": organization_id,
            "name": organization_name,
        },
        "templates": templates,
    }


@app.post("/api/v1/templates/{template_id}/resolve")
def resolve_template(template_id: str, payload: ResolveRequest):
    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                SELECT bv.workspace_id, bv.backend_id, w.key, b.key,
                       bv.disk_encryption, bv.partitioning, bv.secure_boot_required
                FROM bereitstellungsvorlagen bv
                JOIN workspaces w ON w.id = bv.workspace_id
                JOIN backends b ON b.id = bv.backend_id
                WHERE bv.id = %s
                """,
                (template_id,),
            )
            template_row = cur.fetchone()

            if template_row is None:
                return {
                    "success": False,
                    "error": "template_not_found",
                    "message": "Die angeforderte Bereitstellungsvorlage wurde nicht gefunden."
                }

            (
                workspace_id, backend_id, workspace_key, backend_key,
                disk_encryption, partitioning, secure_boot_required,
            ) = template_row

            cur.execute(
                """
                SELECT m.key, bp.ansible_role
                FROM workspace_merkmale wm
                JOIN merkmale m ON m.id = wm.merkmal_id
                JOIN blueprints bp ON bp.merkmal_id = m.id AND bp.backend_id = %s
                WHERE wm.workspace_id = %s
                """,
                (backend_id, workspace_id),
            )
            blueprints = [
                {"merkmal": key, "ansible_role": ansible_role}
                for key, ansible_role in cur.fetchall()
            ]

            cur.execute(
                """
                INSERT INTO assignments (id, device_id, bereitstellungsvorlage_id)
                VALUES (%s, %s, %s)
                ON CONFLICT (device_id) DO UPDATE
                    SET bereitstellungsvorlage_id = EXCLUDED.bereitstellungsvorlage_id
                """,
                (uuid4(), payload.device_id, template_id),
            )

    return {
        "success": True,
        "runtime_blueprint": {
            "workspace_id": workspace_key,
            "backend_id": backend_key,
            "blueprints": blueprints,
            "installation_directives": {
                "disk_encryption": disk_encryption,
                "partitioning": partitioning,
                "secure_boot_required": secure_boot_required,
            },
        },
    }

@app.get("/installers/fedora-workstation/ks.cfg")
def get_fedora_kickstart():
    return FileResponse(
        "installers/fedora-workstation/ks.cfg",
        media_type="text/plain"
    )


@app.post("/api/v1/agent/bootstrap")
def agent_bootstrap(payload: AgentBootstrapRequest):
    agent_secret = secrets.token_urlsafe(32)

    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                """
                UPDATE devices
                SET agent_secret_hash = %s, agent_secret_issued_at = %s
                WHERE id = %s
                RETURNING id
                """,
                (
                    hash_agent_secret(agent_secret),
                    datetime.now(timezone.utc),
                    payload.device_id,
                ),
            )
            updated = cur.fetchone()

    if updated is None:
        return {
            "success": False,
            "error": "device_not_found",
            "message": "Das angegebene Gerät wurde nicht gefunden.",
        }

    return {"success": True, "agent_secret": agent_secret}


@app.post("/api/v1/agent/checkin")
def agent_checkin(
    payload: AgentCheckinRequest,
    authorization: str | None = Header(default=None),
):
    if authorization is None or not authorization.startswith("Bearer "):
        return {
            "success": False,
            "error": "unauthorized",
            "message": "Fehlendes oder ungültiges Authorization-Header.",
        }

    provided_secret = authorization.removeprefix("Bearer ")

    if not verify_agent_secret(payload.device_id, provided_secret):
        return {
            "success": False,
            "error": "unauthorized",
            "message": "Ungültiges Agent-Secret.",
        }

    with get_database_connection() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "UPDATE devices SET agent_last_checkin = %s WHERE id = %s",
                (datetime.now(timezone.utc), payload.device_id),
            )

    return {
        "success": True,
        "blueprints": fetch_assigned_blueprints(payload.device_id),
        "auftraege": fetch_auftragskatalog_state(payload.device_id),
        "ansible_repo": ANSIBLE_CONTENT_REPO,
        "poll_interval_seconds": AGENT_POLL_INTERVAL_SECONDS,
    }


@app.post("/api/v1/agent/report")
def agent_report(
    payload: AgentReportRequest,
    authorization: str | None = Header(default=None),
):
    if authorization is None or not authorization.startswith("Bearer "):
        return {
            "success": False,
            "error": "unauthorized",
            "message": "Fehlendes oder ungültiges Authorization-Header.",
        }

    provided_secret = authorization.removeprefix("Bearer ")

    if not verify_agent_secret(payload.device_id, provided_secret):
        return {
            "success": False,
            "error": "unauthorized",
            "message": "Ungültiges Agent-Secret.",
        }

    for entry in payload.results:
        if entry.event_type not in AGENT_REPORTABLE_EVENT_TYPES:
            return {
                "success": False,
                "error": "invalid_event_type",
                "message": f"Kein vom Agenten meldbarer event_type: {entry.event_type}",
            }

    with get_database_connection() as conn:
        with conn.cursor() as cur:
            merkmal_ids = {}

            for entry in payload.results:
                if entry.merkmal in merkmal_ids:
                    continue

                cur.execute(
                    "SELECT id FROM merkmale WHERE key = %s",
                    (entry.merkmal,),
                )
                merkmal_row = cur.fetchone()

                if merkmal_row is None:
                    return {
                        "success": False,
                        "error": "unknown_merkmal",
                        "message": f"Unbekanntes Merkmal: {entry.merkmal}",
                    }

                merkmal_ids[entry.merkmal] = merkmal_row[0]

            for entry in payload.results:
                cur.execute(
                    """
                    INSERT INTO device_merkmal_events (
                        id, device_id, merkmal_id, event_type, detail
                    )
                    VALUES (%s, %s, %s, %s, %s)
                    """,
                    (
                        uuid4(),
                        payload.device_id,
                        merkmal_ids[entry.merkmal],
                        entry.event_type,
                        Jsonb(entry.detail) if entry.detail is not None else None,
                    ),
                )

    return {"success": True}


@app.get("/api/v1/organizations/{organization_id}/devices")
def get_organization_devices(
    organization_id: str,
    authorization: str | None = Header(default=None),
):
    if not require_service_token(authorization):
        return {
            "success": False,
            "error": "unauthorized",
            "message": "Fehlendes oder ungültiges Service-Token.",
        }

    return {"success": True, "devices": fetch_devices_for_organization(organization_id)}


@app.get("/api/v1/devices")
def list_all_devices(authorization: str | None = Header(default=None)):
    if not require_service_token(authorization):
        return {
            "success": False,
            "error": "unauthorized",
            "message": "Fehlendes oder ungültiges Service-Token.",
        }

    return {"success": True, "devices": fetch_all_devices()}


@app.get("/api/v1/organizations")
def list_organizations(authorization: str | None = Header(default=None)):
    if not require_service_token(authorization):
        return {
            "success": False,
            "error": "unauthorized",
            "message": "Fehlendes oder ungültiges Service-Token.",
        }

    return {"success": True, "organizations": fetch_organizations()}


@app.post("/api/v1/organizations")
def create_organization_endpoint(
    payload: CreateOrganizationRequest,
    authorization: str | None = Header(default=None),
):
    if not require_service_token(authorization):
        return {
            "success": False,
            "error": "unauthorized",
            "message": "Fehlendes oder ungültiges Service-Token.",
        }

    return {"success": True, "organization": create_organization(payload.name)}


@app.patch("/api/v1/organizations/{organization_id}")
def update_organization_endpoint(
    organization_id: str,
    payload: UpdateOrganizationRequest,
    authorization: str | None = Header(default=None),
):
    if not require_service_token(authorization):
        return {
            "success": False,
            "error": "unauthorized",
            "message": "Fehlendes oder ungültiges Service-Token.",
        }

    organization = update_organization(organization_id, payload.name)

    if organization is None:
        return {
            "success": False,
            "error": "organization_not_found",
            "message": "Die Organisation wurde nicht gefunden.",
        }

    return {"success": True, "organization": organization}


@app.get("/api/v1/organizations/{organization_id}/activation-codes")
def list_activation_codes(
    organization_id: str,
    authorization: str | None = Header(default=None),
):
    if not require_service_token(authorization):
        return {
            "success": False,
            "error": "unauthorized",
            "message": "Fehlendes oder ungültiges Service-Token.",
        }

    return {"success": True, "activation_codes": fetch_activation_codes(organization_id)}


@app.post("/api/v1/organizations/{organization_id}/activation-codes")
def create_activation_code_endpoint(
    organization_id: str,
    authorization: str | None = Header(default=None),
):
    if not require_service_token(authorization):
        return {
            "success": False,
            "error": "unauthorized",
            "message": "Fehlendes oder ungültiges Service-Token.",
        }

    return {"success": True, "activation_code": create_activation_code(organization_id)}


@app.get("/api/v1/merkmale")
def list_merkmale(authorization: str | None = Header(default=None)):
    if not require_service_token(authorization):
        return {"success": False, "error": "unauthorized", "message": "Fehlendes oder ungültiges Service-Token."}

    return {"success": True, "merkmale": fetch_merkmale()}


@app.post("/api/v1/merkmale")
def create_merkmal_endpoint(payload: CreateMerkmalRequest, authorization: str | None = Header(default=None)):
    if not require_service_token(authorization):
        return {"success": False, "error": "unauthorized", "message": "Fehlendes oder ungültiges Service-Token."}

    return {"success": True, "merkmal": create_merkmal(payload.key, payload.name, payload.description)}


@app.patch("/api/v1/merkmale/{merkmal_id}")
def update_merkmal_endpoint(
    merkmal_id: str, payload: UpdateMerkmalRequest, authorization: str | None = Header(default=None)
):
    if not require_service_token(authorization):
        return {"success": False, "error": "unauthorized", "message": "Fehlendes oder ungültiges Service-Token."}

    updated = update_merkmal(
        merkmal_id, payload.name, payload.description, payload.kategorie_id, payload.im_auftragskatalog
    )

    if not updated:
        return {"success": False, "error": "not_found", "message": "Merkmal wurde nicht gefunden."}

    return {"success": True}


@app.get("/api/v1/kategorien")
def list_kategorien(authorization: str | None = Header(default=None)):
    if not require_service_token(authorization):
        return {"success": False, "error": "unauthorized", "message": "Fehlendes oder ungültiges Service-Token."}

    return {"success": True, "kategorien": fetch_kategorien()}


@app.post("/api/v1/kategorien")
def create_kategorie_endpoint(payload: CreateKategorieRequest, authorization: str | None = Header(default=None)):
    if not require_service_token(authorization):
        return {"success": False, "error": "unauthorized", "message": "Fehlendes oder ungültiges Service-Token."}

    return {
        "success": True,
        "kategorie": create_kategorie(payload.key, payload.name, payload.description, payload.sort_order),
    }


@app.get("/api/v1/workspaces")
def list_workspaces(authorization: str | None = Header(default=None)):
    if not require_service_token(authorization):
        return {"success": False, "error": "unauthorized", "message": "Fehlendes oder ungültiges Service-Token."}

    return {"success": True, "workspaces": fetch_workspaces()}


@app.post("/api/v1/workspaces")
def create_workspace_endpoint(payload: CreateWorkspaceRequest, authorization: str | None = Header(default=None)):
    if not require_service_token(authorization):
        return {"success": False, "error": "unauthorized", "message": "Fehlendes oder ungültiges Service-Token."}

    return {
        "success": True,
        "workspace": create_workspace(payload.key, payload.name, payload.description, payload.organization_id),
    }


@app.get("/api/v1/workspaces/{workspace_id}")
def get_workspace(workspace_id: str, authorization: str | None = Header(default=None)):
    if not require_service_token(authorization):
        return {"success": False, "error": "unauthorized", "message": "Fehlendes oder ungültiges Service-Token."}

    workspace = fetch_workspace_detail(workspace_id)

    if workspace is None:
        return {"success": False, "error": "not_found", "message": "Workspace wurde nicht gefunden."}

    return {"success": True, "workspace": workspace}


@app.post("/api/v1/workspaces/{workspace_id}/merkmale/{merkmal_id}")
def add_workspace_merkmal(workspace_id: str, merkmal_id: str, authorization: str | None = Header(default=None)):
    if not require_service_token(authorization):
        return {"success": False, "error": "unauthorized", "message": "Fehlendes oder ungültiges Service-Token."}

    add_merkmal_to_workspace(workspace_id, merkmal_id)

    return {"success": True}


@app.delete("/api/v1/workspaces/{workspace_id}/merkmale/{merkmal_id}")
def remove_workspace_merkmal(workspace_id: str, merkmal_id: str, authorization: str | None = Header(default=None)):
    if not require_service_token(authorization):
        return {"success": False, "error": "unauthorized", "message": "Fehlendes oder ungültiges Service-Token."}

    remove_merkmal_from_workspace(workspace_id, merkmal_id)

    return {"success": True}


@app.get("/api/v1/backends")
def list_backends(authorization: str | None = Header(default=None)):
    if not require_service_token(authorization):
        return {"success": False, "error": "unauthorized", "message": "Fehlendes oder ungültiges Service-Token."}

    return {"success": True, "backends": fetch_backends()}


@app.get("/api/v1/blueprints")
def list_blueprints(authorization: str | None = Header(default=None)):
    if not require_service_token(authorization):
        return {"success": False, "error": "unauthorized", "message": "Fehlendes oder ungültiges Service-Token."}

    return {"success": True, "blueprints": fetch_blueprints()}


@app.get("/api/v1/organizations/{organization_id}/bereitstellungsvorlagen")
def list_bereitstellungsvorlagen(organization_id: str, authorization: str | None = Header(default=None)):
    if not require_service_token(authorization):
        return {"success": False, "error": "unauthorized", "message": "Fehlendes oder ungültiges Service-Token."}

    return {"success": True, "bereitstellungsvorlagen": fetch_templates(organization_id)}


@app.get("/api/v1/organizations/{organization_id}/devices/unassigned")
def list_unassigned_devices(organization_id: str, authorization: str | None = Header(default=None)):
    if not require_service_token(authorization):
        return {"success": False, "error": "unauthorized", "message": "Fehlendes oder ungültiges Service-Token."}

    return {"success": True, "devices": fetch_unassigned_devices(organization_id)}


@app.get("/api/v1/organizations/{organization_id}/enrollment-sessions")
def list_enrollment_sessions(organization_id: str, authorization: str | None = Header(default=None)):
    if not require_service_token(authorization):
        return {"success": False, "error": "unauthorized", "message": "Fehlendes oder ungültiges Service-Token."}

    return {"success": True, "enrollment_sessions": fetch_enrollment_sessions(organization_id)}


@app.post("/api/v1/organizations/{organization_id}/enrollment-sessions")
def create_enrollment_session_endpoint(
    organization_id: str,
    payload: CreateEnrollmentSessionRequest,
    authorization: str | None = Header(default=None),
):
    if not require_service_token(authorization):
        return {"success": False, "error": "unauthorized", "message": "Fehlendes oder ungültiges Service-Token."}

    session = create_enrollment_session(
        organization_id, payload.bereitstellungsvorlage_id, payload.max_devices, payload.expires_at
    )

    return {"success": True, "enrollment_session": session}


@app.post("/api/v1/enrollment-sessions/{session_id}/revoke")
def revoke_enrollment_session_endpoint(session_id: str, authorization: str | None = Header(default=None)):
    if not require_service_token(authorization):
        return {"success": False, "error": "unauthorized", "message": "Fehlendes oder ungültiges Service-Token."}

    revoked = revoke_enrollment_session(session_id)

    if not revoked:
        return {"success": False, "error": "not_found", "message": "Enrollment Session wurde nicht gefunden oder ist bereits widerrufen."}

    return {"success": True}


@app.get("/api/v1/devices/{device_id}/auftragskatalog")
def get_device_auftragskatalog(
    device_id: str,
    authorization: str | None = Header(default=None),
):
    if not require_service_token(authorization):
        return {
            "success": False,
            "error": "unauthorized",
            "message": "Fehlendes oder ungültiges Admin-Token.",
        }

    katalog = fetch_auftragskatalog_listing(device_id)

    if katalog is None:
        return {
            "success": False,
            "error": "device_not_assigned",
            "message": "Das Gerät hat keine aktive Bereitstellungsvorlagen-Zuweisung.",
        }

    return {"success": True, "auftragskatalog": katalog}


@app.post("/api/v1/devices/{device_id}/auftragskatalog/{merkmal_key}/select")
def select_auftrag(
    device_id: str,
    merkmal_key: str,
    payload: AuftragSelectRequest,
    authorization: str | None = Header(default=None),
):
    if not require_service_token(authorization):
        return {
            "success": False,
            "error": "unauthorized",
            "message": "Fehlendes oder ungültiges Admin-Token.",
        }

    if not set_auftrag_selection(device_id, merkmal_key, True, payload.optionen):
        return {
            "success": False,
            "error": "unknown_merkmal",
            "message": f"Kein katalogfähiges Merkmal mit Key: {merkmal_key}",
        }

    return {"success": True}


@app.post("/api/v1/devices/{device_id}/auftragskatalog/{merkmal_key}/deselect")
def deselect_auftrag(
    device_id: str,
    merkmal_key: str,
    authorization: str | None = Header(default=None),
):
    if not require_service_token(authorization):
        return {
            "success": False,
            "error": "unauthorized",
            "message": "Fehlendes oder ungültiges Admin-Token.",
        }

    if not set_auftrag_selection(device_id, merkmal_key, False, {}):
        return {
            "success": False,
            "error": "unknown_merkmal",
            "message": f"Kein katalogfähiges Merkmal mit Key: {merkmal_key}",
        }

    return {"success": True}