<?php

namespace App\Services\Rooms;

use App\Models\Deck;
use App\Models\Player;
use App\Models\Room;
use App\Models\User;
use Illuminate\Database\Eloquent\Collection;
use Illuminate\Support\Facades\DB;

class RoomCreationService
{
    /**
     * @return Collection<int, Deck>
     */
    public function availableDecks(?User $user): Collection
    {
        return Deck::query()
            ->where(function ($query) use ($user) {
                $query->where('is_system', true);

                if ($user !== null) {
                    $query->orWhere('user_id', $user->id);
                }
            })
            ->orderBy('name')
            ->get(['id', 'name', 'cards']);
    }

    /**
     * @param  array{deck_id: int, player_name: string, title?: string|null}  $data
     * @return array{Room, Player}
     */
    public function create(array $data, ?User $user): array
    {
        $deck = Deck::query()
            ->whereKey($data['deck_id'])
            ->where(function ($query) use ($user) {
                $query->where('is_system', true);

                if ($user !== null) {
                    $query->orWhere('user_id', $user->id);
                }
            })
            ->firstOrFail();

        return DB::transaction(function () use ($data, $deck, $user): array {
            $room = Room::create([
                'owner_id' => $user?->id,
                'title' => $data['title'] ?? null,
                'last_activity_at' => now(),
                'deck_config' => [
                    'id' => $deck->id,
                    'name' => $deck->name,
                    'cards' => $deck->cards,
                ],
            ]);

            $player = $room->players()->create([
                'user_id' => $user?->id,
                'name' => $data['player_name'],
                'is_moderator' => true,
                'last_seen_at' => now(),
            ]);

            return [$room, $player];
        });
    }
}