"""
API Routes para gestión del Calendario de Contenido.
"""

from datetime import datetime, time
from typing import List, Optional
from fastapi import APIRouter, Depends, HTTPException, Query
from sqlalchemy.orm import Session
from pydantic import BaseModel

from app.core.database import get_db
from app.models.content_calendar import ContentCalendar

router = APIRouter()


# ===========================================
# SCHEMAS
# ===========================================

class CalendarEntryCreate(BaseModel):
    day_of_week: int  # 0=Lunes, 6=Domingo
    time: str  # Formato "HH:MM"
    content_type: str
    platforms: List[str]
    requires_approval: bool = False
    category_filter: Optional[str] = None
    priority: int = 0
    description: Optional[str] = None

    class Config:
        from_attributes = True


class CalendarEntryUpdate(BaseModel):
    day_of_week: Optional[int] = None
    time: Optional[str] = None
    content_type: Optional[str] = None
    platforms: Optional[List[str]] = None
    is_active: Optional[bool] = None
    requires_approval: Optional[bool] = None
    category_filter: Optional[str] = None
    priority: Optional[int] = None
    description: Optional[str] = None

    class Config:
        from_attributes = True


# ===========================================
# ENDPOINTS
# ===========================================

@router.get("/")
async def list_calendar_entries(
    day_of_week: Optional[int] = Query(None),
    content_type: Optional[str] = Query(None),
    platform: Optional[str] = Query(None),
    is_active: Optional[bool] = Query(True),
    db: Session = Depends(get_db)
):
    """Listar entradas del calendario."""
    query = db.query(ContentCalendar)

    if day_of_week is not None:
        query = query.filter(ContentCalendar.day_of_week == day_of_week)
    if content_type:
        query = query.filter(ContentCalendar.content_type == content_type)
    if is_active is not None:
        query = query.filter(ContentCalendar.is_active == is_active)
    if platform:
        query = query.filter(ContentCalendar.platforms.contains([platform]))

    entries = query.order_by(
        ContentCalendar.day_of_week,
        ContentCalendar.time
    ).all()

    return [e.to_dict() for e in entries]


@router.get("/week")
async def get_week_schedule(db: Session = Depends(get_db)):
    """Obtener el calendario semanal completo."""
    entries = db.query(ContentCalendar).filter(
        ContentCalendar.is_active == True
    ).order_by(
        ContentCalendar.day_of_week,
        ContentCalendar.time
    ).all()

    # Organizar por día
    week = {i: [] for i in range(7)}
    for entry in entries:
        week[entry.day_of_week].append(entry.to_dict())

    days = ["Lunes", "Martes", "Miércoles", "Jueves", "Viernes", "Sábado", "Domingo"]
    return {
        days[i]: week[i] for i in range(7)
    }


@router.get("/today")
async def get_today_schedule(db: Session = Depends(get_db)):
    """Obtener el calendario de hoy."""
    today = datetime.now().weekday()

    entries = db.query(ContentCalendar).filter(
        ContentCalendar.day_of_week == today,
        ContentCalendar.is_active == True
    ).order_by(ContentCalendar.time).all()

    return [e.to_dict() for e in entries]


@router.get("/{entry_id}")
async def get_calendar_entry(entry_id: int, db: Session = Depends(get_db)):
    """Obtener una entrada del calendario por ID."""
    entry = db.query(ContentCalendar).filter(ContentCalendar.id == entry_id).first()
    if not entry:
        raise HTTPException(status_code=404, detail="Entrada no encontrada")
    return entry.to_dict()


@router.post("/")
async def create_calendar_entry(entry_data: CalendarEntryCreate, db: Session = Depends(get_db)):
    """Crear una nueva entrada en el calendario."""
    # Parsear hora
    hour, minute = map(int, entry_data.time.split(":"))
    entry_time = time(hour=hour, minute=minute)

    entry = ContentCalendar(
        day_of_week=entry_data.day_of_week,
        time=entry_time,
        content_type=entry_data.content_type,
        platforms=entry_data.platforms,
        requires_approval=entry_data.requires_approval,
        category_filter=entry_data.category_filter,
        priority=entry_data.priority,
        description=entry_data.description
    )

    db.add(entry)
    db.commit()
    db.refresh(entry)
    return entry.to_dict()


@router.put("/{entry_id}")
async def update_calendar_entry(
    entry_id: int,
    entry_data: CalendarEntryUpdate,
    db: Session = Depends(get_db)
):
    """Actualizar una entrada del calendario."""
    entry = db.query(ContentCalendar).filter(ContentCalendar.id == entry_id).first()
    if not entry:
        raise HTTPException(status_code=404, detail="Entrada no encontrada")

    update_data = entry_data.dict(exclude_unset=True)

    # Parsear hora si se proporciona
    if "time" in update_data and update_data["time"]:
        hour, minute = map(int, update_data["time"].split(":"))
        update_data["time"] = time(hour=hour, minute=minute)

    for field, value in update_data.items():
        setattr(entry, field, value)

    entry.updated_at = datetime.utcnow()
    db.commit()
    db.refresh(entry)
    return entry.to_dict()


@router.delete("/{entry_id}")
async def delete_calendar_entry(entry_id: int, db: Session = Depends(get_db)):
    """Eliminar una entrada del calendario."""
    entry = db.query(ContentCalendar).filter(ContentCalendar.id == entry_id).first()
    if not entry:
        raise HTTPException(status_code=404, detail="Entrada no encontrada")

    db.delete(entry)
    db.commit()
    return {"message": "Entrada eliminada", "entry_id": entry_id}


@router.post("/{entry_id}/toggle")
async def toggle_calendar_entry(entry_id: int, db: Session = Depends(get_db)):
    """Activar/desactivar una entrada del calendario."""
    entry = db.query(ContentCalendar).filter(ContentCalendar.id == entry_id).first()
    if not entry:
        raise HTTPException(status_code=404, detail="Entrada no encontrada")

    entry.is_active = not entry.is_active
    db.commit()

    return {
        "message": f"Entrada {'activada' if entry.is_active else 'desactivada'}",
        "is_active": entry.is_active
    }