<?php

namespace App\Http\Controllers;

use App\Enums\RoomStateChange;
use App\Events\RoomStateChanged;
use App\Models\Player;
use App\Models\Room;
use App\Models\Vote;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Validation\ValidationException;

class RoundController extends Controller
{
    public function reset(
        Request $request,
        Room $room,
    ): RedirectResponse {
        $player = $request->attributes->get('currentPlayer');

        abort_unless(
            $player instanceof Player
            && $player->room_id === $room->id
            && $player->is_moderator,
            403,
        );

        $stateVersion = DB::transaction(function () use ($room): int {
            $lockedRoom = Room::query()
                ->lockForUpdate()
                ->findOrFail($room->id);

            $this->ensureRoomIsOpen($lockedRoom);

            Vote::query()
                ->where('room_id', $lockedRoom->id)
                ->where('round', $lockedRoom->current_round)
                ->delete();

            $lockedRoom->update([
                'revealed_at' => null,
                'last_activity_at' => now(),
                'state_version' => $lockedRoom->state_version + 1,
            ]);

            return $lockedRoom->state_version;
        });

        RoomStateChanged::dispatch(
            $room->id,
            $stateVersion,
            RoomStateChange::VotesReset,
        );

        return back();
    }

    public function reveal(
        Request $request,
        Room $room,
    ): RedirectResponse {
        $player = $request->attributes->get('currentPlayer');

        abort_unless(
            $player instanceof Player
            && $player->room_id === $room->id
            && $player->is_moderator,
            403,
        );

        $stateVersion = DB::transaction(function () use ($room): int {
            $lockedRoom = Room::query()
                ->lockForUpdate()
                ->findOrFail($room->id);

            $this->ensureRoomIsOpen($lockedRoom);

            if ($lockedRoom->revealed_at !== null) {
                throw ValidationException::withMessages([
                    'room' => 'Die Karten sind bereits aufgedeckt.',
                ]);
            }

            $lockedRoom->update([
                'revealed_at' => now(),
                'last_activity_at' => now(),
                'state_version' => $lockedRoom->state_version + 1,
            ]);

            return $lockedRoom->state_version;
        });

        RoomStateChanged::dispatch(
            $room->id,
            $stateVersion,
            RoomStateChange::CardsRevealed,
        );

        return back();
    }

    public function nextRound(
        Request $request,
        Room $room,
    ): RedirectResponse {
        $player = $request->attributes->get('currentPlayer');

        abort_unless(
            $player instanceof Player
            && $player->room_id === $room->id
            && $player->is_moderator,
            403,
        );

        $stateVersion = DB::transaction(function () use ($room): int {
            $lockedRoom = Room::query()
                ->lockForUpdate()
                ->findOrFail($room->id);

            $this->ensureRoomIsOpen($lockedRoom);

            if ($lockedRoom->revealed_at === null) {
                throw ValidationException::withMessages([
                    'room' => 'Die aktuelle Runde muss zuerst aufgedeckt werden.',
                ]);
            }

            $lockedRoom->update([
                'current_round' => $lockedRoom->current_round + 1,
                'revealed_at' => null,
                'last_activity_at' => now(),
                'state_version' => $lockedRoom->state_version + 1,
            ]);

            return $lockedRoom->state_version;
        });

        RoomStateChanged::dispatch(
            $room->id,
            $stateVersion,
            RoomStateChange::NextRound,
        );

        return back();
    }

    private function ensureRoomIsOpen(Room $room): void
    {
        if ($room->isClosed()) {
            throw ValidationException::withMessages([
                'room' => 'Dieser Raum ist geschlossen.',
            ]);
        }
    }
}