from datetime import timedelta

from django.http import HttpRequest
from django.utils import timezone
from ninja import Router
from ninja.decorators import decorate_view

from games.decorators import require_game_enabled

from .models import PRESS_BONUS_SECONDS, ClockTimer, Press
from .schemas import ClockStateOut, PlayerStatsOut
from .scoring import ranked_players

router = Router()

PREFIX = "/events/{event_path}/clock"


@router.get(f"{PREFIX}/current", response=ClockStateOut)
@decorate_view(require_game_enabled(path="clock"))
def current_state(request: HttpRequest, event_path: str):
    timer = ClockTimer.current(request.event)
    timer.reset_if_expired()
    now = timezone.now()

    next_press_at = None
    cooldown_seconds = None
    if request.user.is_authenticated:
        last_press = (
            Press.objects.filter(player=request.user, event=request.event)
            .order_by("-pressed_at")
            .first()
        )
        if last_press is not None:
            candidate = last_press.pressed_at + timedelta(
                seconds=last_press.cooldown_seconds
            )
            if candidate > now:
                next_press_at = candidate
                cooldown_seconds = last_press.cooldown_seconds

    return {
        "server_time": now,
        "end_time": timer.end_time,
        "initial_duration": timer.initial_duration,
        "press_bonus_seconds": PRESS_BONUS_SECONDS,
        "next_press_at": next_press_at,
        "cooldown_seconds": cooldown_seconds,
    }


@router.get(f"{PREFIX}/me", response=PlayerStatsOut)
@decorate_view(require_game_enabled(path="clock"))
def my_stats(request: HttpRequest, event_path: str):
    ranked = list(
        ranked_players(request.event)
        .values("id", "clock_points", "rank")
        .order_by("-clock_points", "id")
    )
    total_players = len(ranked)
    my_index = next(
        (i for i, row in enumerate(ranked) if row["id"] == request.user.id), None
    )

    mine = ranked[my_index] if my_index is not None else None
    above = ranked[my_index - 1] if my_index is not None and my_index > 0 else None
    below = (
        ranked[my_index + 1]
        if my_index is not None and my_index + 1 < total_players
        else None
    )

    return {
        "points": mine["clock_points"] if mine else 0.0,
        "rank": mine["rank"] if mine else total_players,
        "total_players": total_players,
        "points_above": above["clock_points"] if above else None,
        "points_below": below["clock_points"] if below else None,
    }