<?php

namespace App\Http\Controllers;

use App\Models\Game;
use Illuminate\Http\Request;
use App\Http\Requests\StoreGameRequest;

class GameController extends Controller
{
    /**
     * Display a listing of the resource.
     */
    public function index(Request $request)
    {
        $query = Game::query()->with(['winner']);

        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);
        }

        // Sorting
        $sortField = $request->input('sort_by', 'began_at');
        $sortDirection = $request->input('sort_direction', 'desc');

        $allowedSortFields = [
            'began_at',
            'ended_at',
            'total_time',
            'type',
            'status'
        ];

        if (in_array($sortField, $allowedSortFields)) {
            $query->orderBy($sortField, $sortDirection === 'asc' ? 'asc' : 'desc');
        }

        // Pagination
        $perPage = $request->input('per_page', 15);
        $games = $query->paginate($perPage);

        return response()->json([
            'data' => $games->items(),
            'meta' => [
                'current_page' => $games->currentPage(),
                'last_page' => $games->lastPage(),
                'per_page' => $games->perPage(),
                'total' => $games->total()
            ]
        ]);
    }

    /**
     * Store a newly created resource in storage.
     */
    public function store(StoreGameRequest $request)
    {
        $validated = $request->validated();
        $user = $request->user();

        $type = $validated['variant'] === 'bisca-3' ? '3' : '9';
        $initialState = $this->initializeGameState($type);

        $game = Game::create([
            'type' => $type,
            'status' => 'in_progress',
            'player1_user_id' => $user->id,
            'player2_user_id' => $validated['mode'] === 'multiplayer' 
                ? $validated['opponent_id'] 
                : 1, // REPLACE 1 with your actual Bot User ID
            'began_at' => now(),
            'custom' => json_encode($initialState),
            'player1_points' => 0,
            'player2_points' => 0,
        ]);
        
        return response()->json([
            'message' => 'Game created successfully',
            'game_id' => $game->id,
            'game_state' => $initialState,
        ], 201);  
    }

    private function initializeGameState($type)
    {
        $handSize = $type === 'S' ? 3 : 9;
        
        $suits = ['H', 'D', 'C', 'S']; 
        $ranks = ['2', '3', '4', '5', '6', '7', 'J', 'Q', 'K', 'A'];
        
        $values = [
            '2' => 0, '3' => 0, '4' => 0, '5' => 0, '6' => 0, 
            '7' => 10, 'J' => 3, 'Q' => 2, 'K' => 4, 'A' => 11
        ];
        
        $deck = [];
        foreach ($suits as $suit) {
            foreach ($ranks as $rank) {
                $deck[] = ['suit' => $suit, 'rank' => $rank, 'value' => $values[$rank]];
            }
        }
        
        // Shuffle and deal
        shuffle($deck);
        $player1Hand = array_splice($deck, 0, $handSize);
        $player2Hand = array_splice($deck, 0, $handSize);
        
        // Trump is the suit of the last card in the remaining stock
        $trumpCard = null;
        if (count($deck) > 0) {
            $trumpCard = $deck[count($deck) - 1]; // Bottom card
        }        

        return [
            'player1_hand' => $player1Hand,
            'player2_hand' => $player2Hand,
            'stock' => $deck,
            'trump' => $trumpCard ? $trumpCard['suit'] : null,
            'current_trick' => [],
            'current_turn' => 'player1',
            'score' => [
                'player1' => 0,
                'player2' => 0
            ],
            'captured' => [
                'player1' => [],
                'player2' => []
            ]
        ];
    }
    /**
     * Display the specified resource.
     */
    public function show(Game $game)
    {
        return $game;
    }

    /**
     * Update the specified resource in storage.
     */
    public function update(Request $request, Game $game)
    {
        $game->update($request->validated());
        return response()->json($game);
    }

    /**
     * Remove the specified resource from storage.
     */
    public function destroy(Game $game)
    {
        //
    }
}