<?php
/**
 * Database Migration Runner
 * Executes all migration files in order
 */

error_reporting(E_ALL);
ini_set('display_errors', 1);

// Load environment variables
$envFile = dirname(__DIR__) . '/.env';
if (!file_exists($envFile)) {
    die("Error: .env file not found at $envFile\n");
}

$envVars = parse_ini_file($envFile);
if (!$envVars) {
    die("Error: Could not parse .env file\n");
}

// Connect to database
$conn = new mysqli(
    $envVars['DB_HOST'],
    $envVars['DB_USER'],
    $envVars['DB_PASS'],
    $envVars['DB_NAME']
);

if ($conn->connect_error) {
    die("Database connection failed: " . $conn->connect_error . "\n");
}

echo "Connected to database: {$envVars['DB_NAME']}\n\n";

// Get all migration files
$migrationFiles = glob(__DIR__ . '/*.sql');
sort($migrationFiles);

// Filter out rollback script
$migrationFiles = array_filter($migrationFiles, function($file) {
    return !strpos($file, 'rollback');
});

if (empty($migrationFiles)) {
    echo "No migration files found.\n";
    exit(0);
}

echo "Found " . count($migrationFiles) . " migration(s):\n";
foreach ($migrationFiles as $file) {
    echo "  - " . basename($file) . "\n";
}
echo "\n";

// Execute each migration
$successCount = 0;
$errorCount = 0;

foreach ($migrationFiles as $file) {
    $filename = basename($file);
    echo "Executing: $filename... ";

    $sql = file_get_contents($file);

    // Split SQL into individual statements
    // This handles multi-statement migrations
    if ($conn->multi_query($sql)) {
        do {
            // Store first result set
            if ($result = $conn->store_result()) {
                $result->free();
            }
            // Check for errors
            if ($conn->errno) {
                echo "FAILED\n";
                echo "  Error: " . $conn->error . "\n";
                $errorCount++;
                break;
            }
        } while ($conn->more_results() && $conn->next_result());

        // If we got through all results without error
        if (!$conn->errno) {
            echo "OK\n";
            $successCount++;
        }
    } else {
        echo "FAILED\n";
        echo "  Error: " . $conn->error . "\n";
        $errorCount++;
    }
}

echo "\n";
echo "Migration Summary:\n";
echo "  Success: $successCount\n";
echo "  Errors: $errorCount\n";

if ($errorCount > 0) {
    echo "\nSome migrations failed. Please review errors above.\n";
    exit(1);
} else {
    echo "\nAll migrations completed successfully!\n";
    exit(0);
}

$conn->close();