<?php
declare(strict_types=1);

/**
 * 快速数据库检查脚本
 * 用法: php scripts/quick-db-check.php
 */

// 加载环境配置
function loadEnv(): void
{
    $envFile = __DIR__ . '/../.env';
    if (file_exists($envFile)) {
        $lines = file($envFile, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
        foreach ($lines as $line) {
            if (strpos($line, '=') !== false && !str_starts_with($line, '#')) {
                list($key, $value) = explode('=', $line, 2);
                $_ENV[trim($key)] = trim($value);
                $_SERVER[trim($key)] = trim($value);
            }
        }
    }
}

// 检查数据库连接
function checkDatabaseConnection(): array
{
    $config = [
        'host' => $_ENV['DB_HOST'] ?? 'localhost',
        'port' => $_ENV['DB_PORT'] ?? '3306',
        'database' => $_ENV['DB_DATABASE'] ?? 'fendx_php',
        'username' => $_ENV['DB_USERNAME'] ?? 'root',
        'password' => $_ENV['DB_PASSWORD'] ?? '',
    ];

    echo "🔍 检查数据库连接...\n";
    echo "   主机: {$config['host']}:{$config['port']}\n";
    echo "   数据库: {$config['database']}\n";
    echo "   用户名: {$config['username']}\n\n";

    try {
        $dsn = "mysql:host={$config['host']};port={$config['port']};charset=utf8mb4";
        $pdo = new PDO($dsn, $config['username'], $config['password'], [
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
        ]);

        echo "✅ 数据库连接成功\n";
        return ['success' => true, 'pdo' => $pdo, 'config' => $config];
    } catch (PDOException $e) {
        echo "❌ 数据库连接失败: " . $e->getMessage() . "\n";
        return ['success' => false, 'error' => $e->getMessage()];
    }
}

// 检查数据库是否存在
function checkDatabaseExists(PDO $pdo, string $database): bool
{
    try {
        $stmt = $pdo->query("SHOW DATABASES LIKE '$database'");
        $result = $stmt->fetch();

        if ($result) {
            echo "✅ 数据库 '$database' 存在\n";
            return true;
        } else {
            echo "❌ 数据库 '$database' 不存在\n";
            return false;
        }
    } catch (PDOException $e) {
        echo "❌ 检查数据库失败: " . $e->getMessage() . "\n";
        return false;
    }
}

// 创建数据库
function createDatabase(PDO $pdo, string $database): bool
{
    try {
        $pdo->exec("CREATE DATABASE IF NOT EXISTS `$database` CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci");
        echo "✅ 数据库 '$database' 创建成功\n";
        return true;
    } catch (PDOException $e) {
        echo "❌ 创建数据库失败: " . $e->getMessage() . "\n";
        return false;
    }
}

// 检查表结构
function checkTables(PDO $pdo, string $database): void
{
    try {
        $pdo->exec("USE `$database`");
        $stmt = $pdo->query("SHOW TABLES");
        $tables = $stmt->fetchAll(PDO::FETCH_COLUMN);

        if (empty($tables)) {
            echo "⚠️  数据库中没有表\n";
            return;
        }

        echo "📊 数据库表:\n";
        foreach ($tables as $table) {
            $stmt = $pdo->query("SELECT COUNT(*) FROM `$table`");
            $count = $stmt->fetchColumn();
            echo "   - $table ($count 条记录)\n";
        }
    } catch (PDOException $e) {
        echo "❌ 检查表失败: " . $e->getMessage() . "\n";
    }
}

// 主检查函数
function main(): void
{
    echo "🚀 FendxPHP 快速数据库检查\n";
    echo str_repeat("=", 40) . "\n";

    // 加载环境配置
    loadEnv();

    // 检查数据库连接
    $result = checkDatabaseConnection();
    
    if (!$result['success']) {
        echo "\n💡 解决建议:\n";
        echo "   1. 检查数据库服务是否启动\n";
        echo "   2. 验证数据库连接配置\n";
        echo "   3. 确认用户权限正确\n";
        return;
    }

    $pdo = $result['pdo'];
    $database = $result['config']['database'];

    echo "\n";

    // 检查数据库是否存在
    if (!checkDatabaseExists($pdo, $database)) {
        echo "\n🔧 尝试创建数据库...\n";
        if (createDatabase($pdo, $database)) {
            echo "✅ 数据库已创建，请运行迁移命令:\n";
            echo "   php bin/console migrate:run\n";
        }
        return;
    }

    echo "\n";

    // 检查表结构
    checkTables($pdo, $database);

    echo "\n" . str_repeat("=", 40) . "\n";
    echo "✅ 数据库检查完成\n";
}

// 运行检查
main();
?>