#!/usr/bin/env php
<?php
/**
 * Run pending migrations on the production database.
 *
 * Usage: php app/migrations/run.php [DB_PATH]
 *
 * If no DB_PATH is given, defaults to storage/xamxam.db.
 *
 * Scans both migrations/pending/ and migrations/applied/ for .sql files.
 * Each is applied in alphabetical order if not already tracked in _migrations.
 */

$root = dirname(__DIR__);
$dbPath = $argv[1] ?? ($root . '/storage/xamxam.db');

// Load the composer autoloader (classmap over src/). PHP migrations require
// src/ files directly, and those files reference sibling classes
// (e.g. Database -> DatabaseMigrations) that are only resolvable via the
// autoloader. Without this, run.php dies on a fresh database.
// vendor/ is a sibling dir in dev (repo root) and same-dir in prod.
$autoloadCandidates = [
    dirname($root) . '/vendor/autoload.php',
    $root . '/vendor/autoload.php',
];
$autoloadPath = null;
foreach ($autoloadCandidates as $candidate) {
    if (file_exists($candidate)) {
        $autoloadPath = $candidate;
        require_once $candidate;
        break;
    }
}

// PHP migrations run as isolated subprocesses, so they do not inherit the
// autoloader above. Export the resolved path so run.php (and any code it
// invokes) can inject it into those subprocesses.
if ($autoloadPath !== null) {
    putenv('XAMXAM_AUTOLOAD=' . $autoloadPath);
    $_ENV['XAMXAM_AUTOLOAD'] = $autoloadPath;
    $_SERVER['XAMXAM_AUTOLOAD'] = $autoloadPath;
}

if (!file_exists($dbPath)) {
    die("Database not found: $dbPath\n");
}

$pdo = new PDO('sqlite:' . $dbPath);
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

// Create migrations tracking table
$pdo->exec("
    CREATE TABLE IF NOT EXISTS _migrations (
        name TEXT PRIMARY KEY,
        applied_at DATETIME DEFAULT CURRENT_TIMESTAMP
    )
");

$applied = $pdo->query("SELECT name FROM _migrations")->fetchAll(PDO::FETCH_COLUMN);

$pendingDir = $root . '/migrations/pending';
$appliedDir = $root . '/migrations/applied';

if (!is_dir($appliedDir)) {
    mkdir($appliedDir, 0755, true);
}

// Collect .sql and .php files from both pending and applied dirs
$files = [];
foreach ([$pendingDir, $appliedDir] as $dir) {
    if (!is_dir($dir)) continue;
    foreach (glob($dir . '/*.{sql,php}', GLOB_BRACE) as $f) {
        $files[basename($f)] = $f;
    }
}
ksort($files);

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

$count = 0;
foreach ($files as $name => $file) {

    if (in_array($name, $applied, true)) {
        echo "Skip (already applied): $name\n";
        continue;
    }

    $ext = strtolower(pathinfo($name, PATHINFO_EXTENSION));
    echo "Applying: $name\n";

    $isPhp = $ext === 'php';

    try {
        if ($isPhp) {
            // PHP migrations: execute in a subprocess for isolation.
            // The subprocess only requires the migration file, so composer's
            // autoloader has to be loaded there too. -d auto_prepend_file
            // injects it without altering the migration's own $argv contract
            // ($argv[1] must remain the DB path).
            $phpArgs = '';
            if ($autoloadPath !== null) {
                $phpArgs = '-d auto_prepend_file=' . escapeshellarg($autoloadPath) . ' ';
            }
            $cmd = sprintf(
                'php %s%s %s 2>&1',
                $phpArgs,
                escapeshellarg($file),
                escapeshellarg($dbPath)
            );
            exec($cmd, $output, $exitCode);
            $outputStr = implode("\n", $output);
            echo $outputStr . "\n";
            if ($exitCode !== 0) {
                // Check output for idempotent errors before treating as fatal
                $skipPatterns = [
                    'no such column',
                    'duplicate column name',
                    'already exists',
                ];
                $shouldSkip = false;
                foreach ($skipPatterns as $pat) {
                    if (stripos($outputStr, $pat) !== false) {
                        $shouldSkip = true;
                        break;
                    }
                }
                if ($shouldSkip) {
                    echo "  Skipping (already applied)\n";
                    // Mark as applied so we don't re-attempt
                    $pdo->prepare("INSERT OR REPLACE INTO _migrations (name) VALUES (?)")->execute([$name]);
                    $count++;
                    continue;
                }
                throw new RuntimeException("PHP migration exited with code $exitCode");
            }
        } else {
            // SQL migrations: execute inline
            $sql = file_get_contents($file);
            $pdo->exec($sql);
        }
    } catch (\Throwable $e) {
        $msg = $e->getMessage();
        // Ignore idempotent errors (column/trigger/index already exists or already removed)
        if (stripos($msg, 'duplicate column name') !== false
            || stripos($msg, 'already exists') !== false
            || stripos($msg, 'no such column') !== false) {
            echo "  Skipping (already applied)\n";
        } else {
            echo "  FAILED: $msg\n";
            throw $e;
        }
    }

    $pdo->prepare("INSERT OR REPLACE INTO _migrations (name) VALUES (?)")->execute([$name]);
    if (str_starts_with($file, $pendingDir)) {
        rename($file, $appliedDir . '/' . $name);
    }
    $count++;
}

echo "$count migration(s) applied.\n";