"""
API Router for catalog module
Endpoints for enseignes, catalogues, and admin operations
"""

import logging
from datetime import datetime

from fastapi import APIRouter, Depends, HTTPException, Query
from sqlalchemy.orm import Session
from sqlalchemy import func, and_

from app.database import get_db
from app.models import Enseigne, Catalogue, CataloguePage, ScrapingLog
from app.schemas_catalogues import (
    EnseigneResponse,
    CatalogueListResponse,
    CatalogueDetailResponse,
    CataloguePageResponse,
    CataloguesPaginatedResponse,
    PaginationMeta,
    ScrapingLogResponse,
    ScrapingStatsResponse,
)
from app.services.bonial_scraper import scrape_all_enseignes, scrape_enseigne

logger = logging.getLogger(__name__)

router = APIRouter(prefix="/api/catalogues", tags=["catalogues"])


# === Enseignes Endpoints ===

@router.get("/enseignes", response_model=list[EnseigneResponse])
async def get_enseignes(
    db: Session = Depends(get_db),
):
    """Get all active enseignes with catalog counts"""
    enseignes = (
        db.query(Enseigne)
        .filter(Enseigne.is_active == True)
        .order_by(Enseigne.ordre_affichage)
        .all()
    )
    
    # Add catalog counts
    result = []
    for enseigne in enseignes:
        count = (
            db.query(func.count(Catalogue.id))
            .filter(
                and_(
                    Catalogue.enseigne_id == enseigne.id,
                    Catalogue.statut == "actif"
                )
            )
            .scalar()
        )
        
        enseigne_data = EnseigneResponse.model_validate(enseigne)
        enseigne_data.catalogues_actifs_count = count
        result.append(enseigne_data)
    
    return result


# === Catalogues Endpoints ===

@router.get("", response_model=CataloguesPaginatedResponse)
async def get_catalogues(
    enseigne_ids: str | None = Query(None, description="Comma-separated enseigne IDs"),
    statut: str | None = Query(None, description="Filter by status: actif, termine, erreur, tous"),
    date_debut_min: datetime | None = Query(None, description="Start date minimum"),
    date_fin_max: datetime | None = Query(None, description="End date maximum"),
    recherche: str | None = Query(None, description="Search in titles"),
    page: int = Query(1, ge=1, description="Page number"),
    limit: int = Query(20, ge=1, le=100, description="Items per page"),
    sort: str = Query("date_debut", description="Sort by: date_debut, date_fin, enseigne"),
    order: str = Query("desc", description="Order: asc, desc"),
    db: Session = Depends(get_db),
):
    """Get catalogues with filters and pagination"""
    
    # Build query
    query = db.query(Catalogue)
    
    # Filter by enseignes
    if enseigne_ids:
        try:
            ids = [int(id_str.strip()) for id_str in enseigne_ids.split(",")]
            query = query.filter(Catalogue.enseigne_id.in_(ids))
        except ValueError:
            raise HTTPException(status_code=400, detail="Invalid enseigne_ids format")
    
    # Filter by status
    if statut and statut != "tous":
        query = query.filter(Catalogue.statut == statut)
    
    # Filter by dates
    if date_debut_min:
        query = query.filter(Catalogue.date_debut >= date_debut_min)
    if date_fin_max:
        query = query.filter(Catalogue.date_fin <= date_fin_max)
    
    # Search in titles
    if recherche:
        query = query.filter(Catalogue.titre.ilike(f"%{recherche}%"))
    
    # Sort
    sort_column = {
        "date_debut": Catalogue.date_debut,
        "date_fin": Catalogue.date_fin,
        "enseigne": Catalogue.enseigne_id,
    }.get(sort, Catalogue.date_debut)
    
    if order == "desc":
        query = query.order_by(sort_column.desc())
    else:
        query = query.order_by(sort_column.asc())
    
    # Count total
    total = query.count()
    
    # Paginate
    offset = (page - 1) * limit
    catalogues = query.offset(offset).limit(limit).all()
    
    # Build response
    data = []
    for catalogue in catalogues:
        cat_response = CatalogueListResponse.model_validate(catalogue)
        data.append(cat_response)
    
    pagination = PaginationMeta(
        total=total,
        page=page,
        limit=limit,
        pages_total=(total + limit - 1) // limit,
    )
    
    # Get last scraping time
    last_scraping = (
        db.query(ScrapingLog)
        .order_by(ScrapingLog.date_execution.desc())
        .first()
    )
    
    metadata = {
        "derniere_mise_a_jour": last_scraping.date_execution if last_scraping else None
    }
    
    return CataloguesPaginatedResponse(
        data=data,
        pagination=pagination,
        metadata=metadata,
    )


@router.get("/{catalogue_id}", response_model=CatalogueDetailResponse)
async def get_catalogue_detail(
    catalogue_id: int,
    db: Session = Depends(get_db),
):
    """Get detailed information for a specific catalogue"""
    catalogue = db.query(Catalogue).filter(Catalogue.id == catalogue_id).first()
    
    if not catalogue:
        raise HTTPException(status_code=404, detail="Catalogue not found")
    
    return CatalogueDetailResponse.model_validate(catalogue)


@router.get("/{catalogue_id}/pages", response_model=list[CataloguePageResponse])
async def get_catalogue_pages(
    catalogue_id: int,
    db: Session = Depends(get_db),
):
    """Get all pages of a catalogue"""
    # Verify catalogue exists
    catalogue = db.query(Catalogue).filter(Catalogue.id == catalogue_id).first()
    
    if not catalogue:
        raise HTTPException(status_code=404, detail="Catalogue not found")
    
    # Get pages ordered by page number
    pages = (
        db.query(CataloguePage)
        .filter(CataloguePage.catalogue_id == catalogue_id)
        .order_by(CataloguePage.numero_page)
        .all()
    )
    
    return [CataloguePageResponse.model_validate(page) for page in pages]


# === Admin Endpoints ===

@router.post("/admin/scraping/trigger", response_model=dict)
async def trigger_scraping(
    enseigne_id: int | None = Query(None, description="Enseigne ID to scrape (null = all)"),
    db: Session = Depends(get_db),
):
    """Manually trigger catalog scraping"""
    
    if enseigne_id:
        # Scrape single enseigne
        enseigne = db.query(Enseigne).filter(Enseigne.id == enseigne_id).first()
        
        if not enseigne:
            raise HTTPException(status_code=404, detail="Enseigne not found")
        
        # Run scraping asynchronously (in background)
        import asyncio
        from app.services.bonial_scraper import scrape_enseigne as scrape_ens
        
        log = await scrape_ens(enseigne, db)
        
        return {
            "success": True,
            "message": f"Scraping complete for {enseigne.nom}",
            "catalogues_trouves": log.catalogues_trouves,
            "catalogues_nouveaux": log.catalogues_nouveaux,
        }
    else:
        # Scrape all enseignes
        logs = await scrape_all_enseignes(db)
        
        total_new = sum(log.catalogues_nouveaux for log in logs)
        total_found = sum(log.catalogues_trouves for log in logs)
        
        return {
            "success": True,
            "message": f"Scraping complete for all enseignes",
            "enseignes_processed": len(logs),
            "catalogues_trouves": total_found,
            "catalogues_nouveaux": total_new,
        }


@router.get("/admin/scraping/logs", response_model=list[ScrapingLogResponse])
async def get_scraping_logs(
    enseigne_id: int | None = Query(None, description="Filter by enseigne"),
    statut: str | None = Query(None, description="Filter by status"),
    limit: int = Query(50, ge=1, le=200, description="Number of logs to return"),
    db: Session = Depends(get_db),
):
    """Get scraping execution logs"""
    query = db.query(ScrapingLog)
    
    if enseigne_id:
        query = query.filter(ScrapingLog.enseigne_id == enseigne_id)
    
    if statut:
        query = query.filter(ScrapingLog.statut == statut)
    
    logs = query.order_by(ScrapingLog.date_execution.desc()).limit(limit).all()
    
    # Add enseigne name
    result = []
    for log in logs:
        log_dict = ScrapingLogResponse.model_validate(log).model_dump()
        if log.enseigne_id:
            enseigne = db.query(Enseigne).filter(Enseigne.id == log.enseigne_id).first()
            log_dict["enseigne_nom"] = enseigne.nom if enseigne else None
        else:
            log_dict["enseigne_nom"] = "Toutes"
        
        result.append(ScrapingLogResponse(**log_dict))
    
    return result


@router.get("/admin/stats", response_model=ScrapingStatsResponse)
async def get_scraping_stats(
    db: Session = Depends(get_db),
):
    """Get scraping statistics"""
    
    # Total catalogues
    total_catalogues = db.query(func.count(Catalogue.id)).scalar()
    
    # Catalogues par enseigne
    catalogues_par_enseigne = {}
    enseignes = db.query(Enseigne).all()
    
    for enseigne in enseignes:
        count = (
            db.query(func.count(Catalogue.id))
            .filter(Catalogue.enseigne_id == enseigne.id)
            .scalar()
        )
        catalogues_par_enseigne[enseigne.nom] = count
    
    # Last scraping time
    last_log = (
        db.query(ScrapingLog)
        .order_by(ScrapingLog.date_execution.desc())
        .first()
    )
    
    derniere_mise_a_jour = last_log.date_execution if last_log else None
    
    # Next execution (6:00 or 18:00)
    now = datetime.now()
    if now.hour < 6:
        prochaine = f"Aujourd'hui à 6:00"
    elif now.hour < 18:
        prochaine = f"Aujourd'hui à 18:00"
    else:
        prochaine = f"Demain à 6:00"
    
    return ScrapingStatsResponse(
        total_catalogues=total_catalogues,
        catalogues_par_enseigne=catalogues_par_enseigne,
        derniere_mise_a_jour=derniere_mise_a_jour,
        prochaine_execution=prochaine,
    )