"""
Geschützter App-Bereich: Dashboard-Lab Layout (kein Produktiv-Dashboard).

/api/app/dashboard-layout — nur mit Session + aktivem Profil (X-Profile-Id).
"""
from typing import Any, Optional

from fastapi import APIRouter, Depends, Header, HTTPException
from psycopg2.extras import Json

from auth import require_auth
from dashboard_layout_schema import DashboardLayoutPayload, coalesce_effective_layout, default_layout_dict
from db import get_cursor, get_db
from routers.profiles import get_pid
from widget_catalog import catalog_response

router = APIRouter(prefix="/api/app", tags=["app-dashboard-lab"])


@router.get("/widgets/catalog")
def get_widgets_catalog(session: dict = Depends(require_auth)) -> dict[str, Any]:
    """Metadaten aller registrierbaren Dashboard-Widgets (IDs, Titel)."""
    _ = session
    return catalog_response()


@router.get("/dashboard-layout")
def get_dashboard_layout(
    x_profile_id: Optional[str] = Header(default=None),
    session: dict = Depends(require_auth),
) -> dict[str, Any]:
    _ = session
    pid = get_pid(x_profile_id)
    with get_db() as conn:
        cur = get_cursor(conn)
        cur.execute(
            "SELECT dashboard_layout FROM profiles WHERE id = %s",
            (pid,),
        )
        row = cur.fetchone()
    raw = row["dashboard_layout"] if row else None
    custom, effective = coalesce_effective_layout(raw)
    return {
        "custom": custom,
        "layout": effective,
        "default_layout": default_layout_dict(),
    }


@router.put("/dashboard-layout")
def put_dashboard_layout(
    body: dict[str, Any],
    x_profile_id: Optional[str] = Header(default=None),
    session: dict = Depends(require_auth),
) -> dict[str, Any]:
    _ = session
    pid = get_pid(x_profile_id)
    try:
        payload = DashboardLayoutPayload.model_validate(body)
    except Exception as e:
        raise HTTPException(422, str(e)) from e
    stored = payload.to_stored_dict()
    with get_db() as conn:
        cur = get_cursor(conn)
        cur.execute(
            "UPDATE profiles SET dashboard_layout = %s WHERE id = %s",
            (Json(stored), pid),
        )
        if cur.rowcount == 0:
            raise HTTPException(404, "Profil nicht gefunden")
    return {"ok": True, "layout": stored}


@router.post("/dashboard-layout/reset")
def reset_dashboard_layout(
    x_profile_id: Optional[str] = Header(default=None),
    session: dict = Depends(require_auth),
) -> dict[str, Any]:
    _ = session
    pid = get_pid(x_profile_id)
    with get_db() as conn:
        cur = get_cursor(conn)
        cur.execute(
            "UPDATE profiles SET dashboard_layout = NULL WHERE id = %s",
            (pid,),
        )
        if cur.rowcount == 0:
            raise HTTPException(404, "Profil nicht gefunden")
    return {"ok": True, "layout": default_layout_dict()}