"""Collection API endpoints"""
from fastapi import APIRouter, Query, HTTPException
from typing import List, Optional
import json
from app.core.database import init_db, pool as db_pool

router = APIRouter()


@router.get("/summary")
async def get_collection_summary(
    types: Optional[str] = Query(None, description="Comma-separated list: movie,show,music")
):
    """
    Get collection summary by country and media type.
    Returns counts per country per media type.
    """
    # Ensure pool is initialized
    from app.core.database import init_db, pool as db_pool
    await init_db()
    
    if db_pool is None:
        from fastapi import HTTPException
        raise HTTPException(status_code=503, detail="Database not available")
    
    # Parse types filter
    type_filter = []
    if types:
        type_filter = [t.strip() for t in types.split(",") if t.strip() in ["movie", "show", "music"]]
    
    async with db_pool.connection() as conn:
        async with conn.cursor() as cur:
            # Build query
            query = """
                SELECT 
                    mc.country_code,
                    mi.media_type,
                    COUNT(*) as count
                FROM moviemap.media_country mc
                JOIN moviemap.media_item mi ON mc.media_item_id = mi.id
            """
            params = []
            if type_filter:
                query += " WHERE mi.media_type = ANY(%s)"
                params.append(type_filter)
            
            query += """
                GROUP BY mc.country_code, mi.media_type
                ORDER BY mc.country_code, mi.media_type
            """
            
            await cur.execute(query, params if params else None)
            rows = await cur.fetchall()
            
            # Transform to nested dict structure
            result = {}
            for row in rows:
                country_code, media_type, count = row
                if country_code not in result:
                    result[country_code] = {}
                result[country_code][media_type] = count
            
            return result


@router.get("/by-country")
async def get_media_by_country(
    country_code: str = Query(..., description="ISO 3166-1 alpha-2 country code"),
    types: Optional[str] = Query(None, description="Comma-separated list: movie,show,music")
):
    """
    Get list of media items for a specific country.
    Returns media items with their details.
    """
    await init_db()
    if db_pool is None:
        raise HTTPException(status_code=503, detail="Database not available")
    
    # Validate country code
    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()
    
    # Parse types filter
    type_filter = []
    if types:
        type_filter = [t.strip() for t in types.split(",") if t.strip() in ["movie", "show", "music"]]
    
    async with db_pool.connection() as conn:
        async with conn.cursor() as cur:
            query = """
                SELECT 
                    mi.id,
                    mi.source_kind,
                    mi.source_item_id,
                    mi.title,
                    mi.year,
                    mi.media_type
                FROM moviemap.media_country mc
                JOIN moviemap.media_item mi ON mc.media_item_id = mi.id
                WHERE mc.country_code = %s
            """
            params = [country_code]
            
            if type_filter:
                query += " AND mi.media_type = ANY(%s)"
                params.append(type_filter)
            
            query += " ORDER BY mi.title"
            
            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 {
                "country_code": country_code,
                "count": len(items),
                "items": items
            }