"""Admin API endpoints"""
from fastapi import APIRouter, HTTPException, Header, Query
from typing import Optional, List
from app.core.config import settings
from app.core.database import init_db, pool as db_pool
from app.services.sync import sync_all_arrs

router = APIRouter()


async def verify_admin_token(authorization: Optional[str] = Header(None)):
    """Verify admin token if configured"""
    if settings.admin_token:
        if not authorization or authorization != f"Bearer {settings.admin_token}":
            raise HTTPException(status_code=401, detail="Unauthorized")
    # If no admin token configured, allow (assuming localhost-only access)


@router.post("/sync")
async def trigger_sync(authorization: Optional[str] = Header(None)):
    """
    Trigger sync from all *arr instances.
    Requires admin token if MOVIEMAP_ADMIN_TOKEN is set.
    """
    await verify_admin_token(authorization)
    
    try:
        result = await sync_all_arrs()
        return {
            "status": "success",
            "synced": result
        }
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Sync failed: {str(e)}")


@router.get("/missing-countries")
async def get_missing_countries(
    authorization: Optional[str] = Header(None),
    source_kind: Optional[str] = Query(None, description="Filter by source: radarr, sonarr, lidarr"),
    media_type: Optional[str] = Query(None, description="Filter by media type: movie, show, music"),
    limit: int = Query(100, ge=1, le=1000)
):
    """
    Get list of media items without country metadata.
    Requires admin token if MOVIEMAP_ADMIN_TOKEN is set.
    """
    await verify_admin_token(authorization)
    await init_db()
    if db_pool is None:
        raise HTTPException(status_code=503, detail="Database not available")
    
    async with db_pool.connection() as conn:
        async with conn.cursor() as cur:
            # Get total count
            count_query = """
                SELECT COUNT(DISTINCT mi.id)
                FROM moviemap.media_item mi
                LEFT JOIN moviemap.media_country mc ON mi.id = mc.media_item_id
                WHERE mc.media_item_id IS NULL
            """
            count_params = []
            
            if source_kind:
                count_query += " AND mi.source_kind = %s"
                count_params.append(source_kind)
            if media_type:
                count_query += " AND mi.media_type = %s"
                count_params.append(media_type)
            
            await cur.execute(count_query, count_params if count_params else None)
            total_count = (await cur.fetchone())[0]
            
            # Get items
            query = """
                SELECT 
                    mi.id,
                    mi.source_kind,
                    mi.source_item_id,
                    mi.title,
                    mi.year,
                    mi.media_type
                FROM moviemap.media_item mi
                LEFT JOIN moviemap.media_country mc ON mi.id = mc.media_item_id
                WHERE mc.media_item_id IS NULL
            """
            params = []
            
            if source_kind:
                query += " AND mi.source_kind = %s"
                params.append(source_kind)
            if media_type:
                query += " AND mi.media_type = %s"
                params.append(media_type)
            
            query += " ORDER BY mi.title LIMIT %s"
            params.append(limit)
            
            await cur.execute(query, params)
            rows = await cur.fetchall()
            
            items = []
            for row in rows:
                items.append({
                    "id": str(row[0]),
                    "source_kind": row[1],
                    "source_item_id": row[2],
                    "title": row[3],
                    "year": row[4],
                    "media_type": row[5],
                })
            
            return {
                "total": total_count,
                "returned": len(items),
                "items": items
            }


@router.post("/assign-country")
async def assign_country_manually(
    item_id: str,
    country_code: str,
    authorization: Optional[str] = Header(None)
):
    """
    Manually assign a country code to a media item.
    Requires admin token if MOVIEMAP_ADMIN_TOKEN is set.
    """
    await verify_admin_token(authorization)
    await init_db()
    if db_pool is None:
        raise HTTPException(status_code=503, detail="Database not available")
    
    # Validate country code (should be 2 letters)
    if len(country_code) != 2 or not country_code.isalpha():
        raise HTTPException(status_code=400, detail="Country code must be 2 letters (ISO 3166-1 alpha-2)")
    
    country_code = country_code.upper()
    
    async with db_pool.connection() as conn:
        async with conn.cursor() as cur:
            # Check if item exists
            await cur.execute("SELECT id FROM moviemap.media_item WHERE id = %s", (item_id,))
            if not await cur.fetchone():
                raise HTTPException(status_code=404, detail="Media item not found")
            
            # Insert or update country association
            await cur.execute(
                """
                INSERT INTO moviemap.media_country (media_item_id, country_code)
                VALUES (%s, %s)
                ON CONFLICT (media_item_id, country_code) DO NOTHING
                """,
                (item_id, country_code)
            )
            await conn.commit()
            
            return {
                "status": "success",
                "item_id": item_id,
                "country_code": country_code
            }