from typing import List, Optional
from fastapi import APIRouter, Depends, HTTPException, status, Request
from sqlalchemy.orm import Session
from datetime import date
from app.api.deps import get_db, get_current_read_user, get_current_operator_user
from app.crud.crud_overflight import overflight as crud_overflight
from app.schemas.overflight import Overflight, OverflightCreate, OverflightUpdate, OverflightStatus, OverflightStatusUpdate
from app.models.ppr import User
from app.core.utils import get_client_ip

router = APIRouter()


@router.get("/", response_model=List[Overflight])
async def get_overflights(
    request: Request,
    skip: int = 0,
    limit: int = 100,
    status: Optional[OverflightStatus] = None,
    date_from: Optional[date] = None,
    date_to: Optional[date] = None,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_read_user)
):
    """Get overflight records with optional filtering"""
    overflights = crud_overflight.get_multi(
        db, skip=skip, limit=limit, status=status, 
        date_from=date_from, date_to=date_to
    )
    return overflights


@router.post("/", response_model=Overflight)
async def create_overflight(
    request: Request,
    overflight_in: OverflightCreate,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_operator_user)
):
    """Create a new overflight record"""
    overflight = crud_overflight.create(db, obj_in=overflight_in, created_by=current_user.username)
    
    # Send real-time update via WebSocket
    if hasattr(request.app.state, 'connection_manager'):
        await request.app.state.connection_manager.broadcast({
            "type": "overflight_created",
            "data": {
                "id": overflight.id,
                "registration": overflight.registration,
                "departure_airfield": overflight.departure_airfield,
                "destination_airfield": overflight.destination_airfield,
                "status": overflight.status.value
            }
        })
    
    return overflight


@router.get("/{overflight_id}", response_model=Overflight)
async def get_overflight(
    overflight_id: int,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_read_user)
):
    """Get a specific overflight record"""
    overflight = crud_overflight.get(db, overflight_id=overflight_id)
    if not overflight:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Overflight record not found"
        )
    return overflight


@router.put("/{overflight_id}", response_model=Overflight)
async def update_overflight(
    request: Request,
    overflight_id: int,
    overflight_in: OverflightUpdate,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_operator_user)
):
    """Update an overflight record"""
    db_overflight = crud_overflight.get(db, overflight_id=overflight_id)
    if not db_overflight:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Overflight record not found"
        )
    
    # Get user IP from request
    user_ip = request.client.host if request.client else None
    
    overflight = crud_overflight.update(
        db, 
        db_obj=db_overflight, 
        obj_in=overflight_in,
        user=current_user.username,
        user_ip=user_ip
    )
    
    # Send real-time update
    if hasattr(request.app.state, 'connection_manager'):
        await request.app.state.connection_manager.broadcast({
            "type": "overflight_updated",
            "data": {
                "id": overflight.id,
                "registration": overflight.registration,
                "status": overflight.status.value
            }
        })
    
    return overflight


@router.patch("/{overflight_id}/status", response_model=Overflight)
async def update_overflight_status(
    request: Request,
    overflight_id: int,
    status_update: OverflightStatusUpdate,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_operator_user)
):
    """Update overflight status (ACTIVE -> INACTIVE for QSY)"""
    client_ip = get_client_ip(request)
    overflight = crud_overflight.update_status(
        db, 
        overflight_id=overflight_id, 
        status=status_update.status,
        timestamp=status_update.timestamp if hasattr(status_update, 'timestamp') else None,
        user=current_user.username,
        user_ip=client_ip
    )
    if not overflight:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Overflight record not found"
        )
    
    # Send real-time update
    if hasattr(request.app.state, 'connection_manager'):
        await request.app.state.connection_manager.broadcast({
            "type": "overflight_status_update",
            "data": {
                "id": overflight.id,
                "registration": overflight.registration,
                "status": overflight.status.value,
                "qsy_dt": overflight.qsy_dt.isoformat() if overflight.qsy_dt else None
            }
        })
    
    return overflight


@router.delete("/{overflight_id}", response_model=Overflight)
async def cancel_overflight(
    request: Request,
    overflight_id: int,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_operator_user)
):
    """Cancel an overflight record"""
    client_ip = get_client_ip(request)
    overflight = crud_overflight.cancel(
        db, 
        overflight_id=overflight_id,
        user=current_user.username,
        user_ip=client_ip
    )
    if not overflight:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Overflight record not found"
        )
    
    # Send real-time update
    if hasattr(request.app.state, 'connection_manager'):
        await request.app.state.connection_manager.broadcast({
            "type": "overflight_cancelled",
            "data": {
                "id": overflight.id,
                "registration": overflight.registration
            }
        })
    
    return overflight


@router.get("/active/list", response_model=List[Overflight])
async def get_active_overflights(
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_read_user)
):
    """Get currently active overflights"""
    overflights = crud_overflight.get_active_overflights(db)
    return overflights


@router.get("/today/list", response_model=List[Overflight])
async def get_overflights_today(
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_read_user)
):
    """Get today's overflights"""
    overflights = crud_overflight.get_overflights_today(db)
    return overflights