from fastapi import APIRouter, Depends
from sqlalchemy.orm import Session
from datetime import datetime
from ..database import get_db
from ..models import Court, Match, Event, Stage, Player, CourtReservation

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


@router.get("/")
def get_dashboard(db: Session = Depends(get_db)):
    courts = db.query(Court).all()
    courts_data = []

    for court in courts:
        current_match = db.query(Match).filter(
            Match.court_id == court.id,
            Match.status == "in_progress"
        ).first()

        match_data = None
        elapsed = None
        if current_match:
            p1 = db.query(Player).filter(Player.id == current_match.player1_id).first() if current_match.player1_id else None
            p2 = db.query(Player).filter(Player.id == current_match.player2_id).first() if current_match.player2_id else None
            if current_match.started_at:
                elapsed = int((datetime.utcnow() - current_match.started_at).total_seconds())
            match_data = {
                "id": current_match.id,
                "player1_id": current_match.player1_id,
                "player2_id": current_match.player2_id,
                "player1_name": p1.name if p1 else None,
                "player2_name": p2.name if p2 else None,
                "score1": current_match.score1,
                "score2": current_match.score2,
                "status": current_match.status,
                "elapsed_seconds": elapsed,
                "stage_id": current_match.stage_id,
            }

        # Next reservation
        now = datetime.utcnow()
        next_reservation = db.query(CourtReservation).filter(
            CourtReservation.court_id == court.id,
            CourtReservation.start_time > now
        ).order_by(CourtReservation.start_time).first()

        courts_data.append({
            "id": court.id,
            "name": court.name,
            "court_type": court.court_type,
            "status": court.status,
            "current_match": match_data,
            "elapsed_seconds": elapsed,
            "next_reservation": {
                "start_time": next_reservation.start_time,
                "group_name": next_reservation.group_name,
            } if next_reservation else None,
        })

    # Upcoming scheduled matches (not yet in progress)
    upcoming = db.query(Match).filter(
        Match.status == "scheduled",
        Match.player1_id.isnot(None),
        Match.player2_id.isnot(None)
    ).limit(10).all()

    upcoming_data = []
    for m in upcoming:
        p1 = db.query(Player).filter(Player.id == m.player1_id).first()
        p2 = db.query(Player).filter(Player.id == m.player2_id).first()
        stage = db.query(Stage).filter(Stage.id == m.stage_id).first()
        event = db.query(Event).filter(Event.id == stage.event_id).first() if stage else None
        upcoming_data.append({
            "id": m.id,
            "player1_name": p1.name if p1 else None,
            "player2_name": p2.name if p2 else None,
            "round_number": m.round_number,
            "event_name": event.name if event else None,
            "stage_name": stage.name if stage else None,
        })

    # Active event summary
    active_event = db.query(Event).filter(Event.status == "active").first()
    active_event_data = None
    if active_event:
        active_stage = None
        if active_event.current_stage_id:
            active_stage = db.query(Stage).filter(Stage.id == active_event.current_stage_id).first()
        active_event_data = {
            "id": active_event.id,
            "name": active_event.name,
            "format": active_event.format,
            "current_stage": active_stage.name if active_stage else None,
            "current_stage_id": active_event.current_stage_id,
        }

    return {
        "courts": courts_data,
        "upcoming_matches": upcoming_data,
        "active_event": active_event_data,
    }


@router.get("/screen/{court_id}")
def screen_view(court_id: int, db: Session = Depends(get_db)):
    """TV/screen display for a specific court"""
    court = db.query(Court).filter(Court.id == court_id).first()
    if not court:
        return {"error": "Court not found"}

    current_match = db.query(Match).filter(
        Match.court_id == court_id,
        Match.status == "in_progress"
    ).first()

    match_data = None
    if current_match:
        p1 = db.query(Player).filter(Player.id == current_match.player1_id).first()
        p2 = db.query(Player).filter(Player.id == current_match.player2_id).first()
        elapsed = None
        if current_match.started_at:
            elapsed = int((datetime.utcnow() - current_match.started_at).total_seconds())
        match_data = {
            "id": current_match.id,
            "player1_name": p1.name if p1 else "TBD",
            "player2_name": p2.name if p2 else "TBD",
            "score1": current_match.score1 if current_match.score1 is not None else 0,
            "score2": current_match.score2 if current_match.score2 is not None else 0,
            "elapsed_seconds": elapsed,
        }

    return {
        "court": {"id": court.id, "name": court.name, "status": court.status},
        "current_match": match_data,
    }