<?php

namespace App\Controllers;

use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
use App\Models\Game;
use Slim\Views\Twig;

class GameController extends Controller
{
    private \PDO $pdo;

    public function __construct(\PDO $pdo, Twig $view)
    {
        parent::__construct($view);
        $this->pdo = $pdo;
    }

    public function index(Request $request, Response $response, $args)
    {
        $queryParams = $request->getQueryParams();

        // Get pagination parameters
        $page = max(1, (int)($queryParams['page'] ?? 1));
        $perPage = max(12, min(100, (int)($queryParams['per_page'] ?? 24)));

        // Get search parameters
        $search = trim($queryParams['search'] ?? '');

        // Get filter parameters
        $genres = $queryParams['genres'] ?? [];
        if (!is_array($genres)) {
            $genres = [$genres];
        }
        $genres = array_filter($genres);

        $platforms = $queryParams['platforms'] ?? [];
        if (!is_array($platforms)) {
            $platforms = [$platforms];
        }
        $platforms = array_filter($platforms);

        // Get view mode
        $viewMode = $queryParams['view'] ?? 'grid'; // grid, list, covers

        // Get games with pagination and filters
        $games = Game::getGroupedGamesWithPagination($this->pdo, $page, $perPage, $search, $genres, $platforms);

        // Get total count for pagination
        $totalCount = Game::getTotalCount($this->pdo, $search, $genres, $platforms);

        // Get available filter options
        $availableGenres = Game::getAvailableGenres($this->pdo);
        $availablePlatforms = Game::getAvailablePlatforms($this->pdo);

        // Calculate pagination info
        $totalPages = ceil($totalCount / $perPage);
        $hasNextPage = $page < $totalPages;
        $hasPrevPage = $page > 1;

        return $this->view->render($response, 'games/index.twig', [
            'title' => 'Games',
            'games' => $games,
            'pagination' => [
                'current_page' => $page,
                'per_page' => $perPage,
                'total_pages' => $totalPages,
                'total_items' => $totalCount,
                'has_next' => $hasNextPage,
                'has_prev' => $hasPrevPage,
                'next_page' => $page + 1,
                'prev_page' => $page - 1
            ],
            'search' => $search,
            'view_mode' => $viewMode,
            'view_modes' => ['grid', 'list', 'covers'],
            'filters' => [
                'genres' => $genres,
                'platforms' => $platforms
            ],
            'available_filters' => [
                'genres' => $availableGenres,
                'platforms' => $availablePlatforms
            ]
        ]);
    }

    public function show(Request $request, Response $response, $args)
    {
        $gameKey = $args['game_key'];

        // Find the main game entry (could be any platform version)
        $stmt = $this->pdo->prepare("
            SELECT g.*, s.display_name as source_name
            FROM games g
            JOIN sources s ON g.source_id = s.id
            WHERE g.game_key = :game_key
            LIMIT 1
        ");
        $stmt->execute(['game_key' => $gameKey]);
        $mainGame = $stmt->fetch(\PDO::FETCH_ASSOC);

        if (!$mainGame) {
            return $response->withStatus(404);
        }

        // Get all platform versions
        $gameModel = new Game($this->pdo);
        $gameModel->id = $mainGame['id'];
        $gameModel->game_key = $mainGame['game_key'];
        $platformVersions = $gameModel->getPlatformVersions();

        return $this->view->render($response, 'games/show.twig', [
            'title' => $mainGame['title'],
            'main_game' => $mainGame,
            'platform_versions' => $platformVersions
        ]);
    }
}