<?php

namespace App\Http\Controllers;

use App\Models\Game;
use Illuminate\Http\Request;
use App\Http\Requests\StoreGameRequest;
use Illuminate\Support\Facades\Auth;

class GameController extends Controller
{
    public function index(Request $request)
    {
        $query = Game::query()->with(['winner', 'player1', 'player2']);

        if ($request->has('type') && in_array($request->type, ['3', '9'])) {
            $query->where('type', $request->type);
        }

        if ($request->has('status') && in_array($request->status, ['Pending', 'Playing', 'Ended', 'Interrupted'])) {
            $query->where('status', $request->status);
        }

        $query->orderBy('began_at', 'desc');

        return response()->json($query->paginate(15));
    }

    public function store(Request $request)
    {
        $validated = $request->validate([
            'type' => 'required|in:3,9',
        ]);

        $user = Auth::user();

        $activeGame = Game::where(function ($query) use ($user) {
            $query->where('player1_user_id', $user->id)
                  ->orWhere('player2_user_id', $user->id);
        })
        ->whereIn('status', ['Pending', 'Playing'])
        ->exists();

        if ($activeGame) {
            return response()->json(['message' => 'You already have an active game.'], 400);
        }

        $game = Game::create([
            'type' => $validated['type'],
            'status' => 'Pending',
            'player1_user_id' => $user->id,
            'player2_user_id' => $user->id, 
            'winner_user_id' => $user->id,  
            'loser_user_id' => $user->id,   
            'began_at' => now(),
            'player1_points' => 0,
            'player2_points' => 0,
            'custom' => null
        ]);

        return response()->json([
            'message' => 'Multiplayer game room created',
            'game' => $game
        ], 201);
    }

    public function join(Game $game)
    {
        $user = Auth::user();

        if ($game->player1_user_id == $user->id) {
            return response()->json([
                'message' => 'Waiting for opponent...',
                'game' => $game
            ], 200);
        }

        if ($game->status !== 'Pending') {
            return response()->json(['message' => 'Game is full or already started'], 400);
        }

        $activeGame = Game::where(function ($query) use ($user) {
            $query->where('player1_user_id', $user->id)
                  ->orWhere('player2_user_id', $user->id);
        })
        ->whereIn('status', ['Pending', 'Playing'])
        ->exists();

        if ($activeGame) {
            return response()->json(['message' => 'You are already in another active game.'], 400);
        }

        $game->update([
            'status' => 'Playing',
            'player2_user_id' => $user->id,
        ]);

        return response()->json([
            'message' => 'Joined successfully! Game starts now.',
            'game' => $game
        ], 200);
    }

    public function show(Game $game)
    {
        $game->load(['player1', 'player2', 'winner']);
        return response()->json($game);
    }

    public function update(Request $request, Game $game)
    {
        if ($game->status == 'Ended') {
            return response()->json(['message' => 'Game already ended'], 400);
        }

        $data = $request->validate([
            'status' => 'in:Playing,Ended,Interrupted',
            'winner_user_id' => 'exists:users,id', 
            'loser_user_id' => 'exists:users,id',
            'player1_points' => 'integer',
            'player2_points' => 'integer',
            'is_draw' => 'boolean',
            'total_time' => 'numeric'
        ]);

        if (isset($data['status']) && $data['status'] === 'Ended') {
            $data['ended_at'] = now();
        }

        $game->update($data);

        return response()->json($game);
    }
}