<?php
// ─────────────────────────────────────────────────────────────────────────
// One-off permission fixer for the PayPal integration's data/ directory.
// Upload to /pp-integration/ and open in a browser:
//     https://dev.hotlunches.net/pp-integration/fix_perms.php
// It makes data/ writable so onboarding can save school_merchants.json etc.
// DELETE THIS FILE once data/ is writable.
// ─────────────────────────────────────────────────────────────────────────
header('Content-Type: text/plain');

$base    = __DIR__;
$dataDir = $base . '/data';
$dataFiles = ['school_merchants.json', 'pending_onboarding.json'];

function describe($p) {
    if (!file_exists($p)) return '(missing)';
    clearstatcache(true, $p);
    $perms = substr(sprintf('%o', fileperms($p)), -4);
    $owner = fileowner($p);
    $group = filegroup($p);
    if (function_exists('posix_getpwuid')) { $o = posix_getpwuid($owner); if ($o) $owner = $o['name'] . " ($owner)"; }
    if (function_exists('posix_getgrgid')) { $g = posix_getgrgid($group); if ($g) $group = $g['name'] . " ($group)"; }
    return "perms=$perms owner=$owner group=$group writable=" . (is_writable($p) ? 'YES' : 'NO');
}

function testWrite($dir) {
    clearstatcache();
    $probe = $dir . '/_write_probe.txt';
    $ok = @file_put_contents($probe, 'ok ' . date('c'));
    if ($ok !== false) @unlink($probe);
    return $ok !== false;
}

echo "=== data/ permission fixer ===\n";
echo "Script dir : $base\n";
echo "Data dir   : $dataDir\n\n";

echo "PHP runs as:\n";
echo "  getmyuid()        : " . getmyuid() . "\n";
echo "  getmygid()        : " . getmygid() . "\n";
if (function_exists('posix_geteuid')) {
    echo "  effective uid     : " . posix_geteuid() . "\n";
    if (function_exists('posix_getpwuid')) {
        $pw = posix_getpwuid(posix_geteuid());
        echo "  effective user    : " . ($pw['name'] ?? '?') . "\n";
    }
}
echo "  get_current_user(): " . get_current_user() . "\n\n";

echo "Before:\n";
echo "  parent : " . describe($base) . "\n";
echo "  data   : " . describe($dataDir) . "\n\n";

if (testWrite($dataDir)) {
    echo "data/ is ALREADY writable. Nothing to do. You can delete fix_perms.php.\n";
    exit;
}

// ── Attempt 1: chmod the directory (works if PHP owns it) ──────────────────
echo "--- Attempt 1: chmod 0777 data/ ---\n";
$r = @chmod($dataDir, 0777);
echo "  chmod: " . ($r ? 'OK' : 'FAILED') . "\n";
foreach ($dataFiles as $f) {
    $fp = $dataDir . '/' . $f;
    if (file_exists($fp)) { @chmod($fp, 0666); }
}
echo "  data now: " . describe($dataDir) . "\n";

if (testWrite($dataDir)) {
    echo "\nSUCCESS: data/ is now writable. Re-run onboarding, then DELETE fix_perms.php.\n";
    exit;
}

// ── Attempt 2: recreate data/ so it is owned by the PHP user ───────────────
// Only possible if PHP can write the parent directory.
echo "\n--- Attempt 2: recreate data/ as PHP-owned ---\n";
if (is_writable($base)) {
    // preserve existing JSON in memory
    $preserved = [];
    foreach ($dataFiles as $f) {
        $fp = $dataDir . '/' . $f;
        if (file_exists($fp)) $preserved[$f] = file_get_contents($fp);
    }
    $backup = $base . '/data_old_' . date('Ymd_His');
    if (@rename($dataDir, $backup)) {
        echo "  moved old data/ -> " . basename($backup) . " (kept as backup)\n";
        if (@mkdir($dataDir, 0777, true)) {
            echo "  created fresh data/ (owned by PHP user)\n";
            foreach ($preserved as $f => $c) @file_put_contents($dataDir . '/' . $f, $c);
            if (testWrite($dataDir)) {
                echo "  data now: " . describe($dataDir) . "\n";
                echo "\nSUCCESS via recreate. Old data kept in " . basename($backup) . ".\n";
                echo "Re-run onboarding, then DELETE fix_perms.php (and the backup folder if you like).\n";
                exit;
            }
            echo "  still not writable; restoring original...\n";
            // best-effort restore
            @array_map('unlink', glob($dataDir . '/*'));
            @rmdir($dataDir);
        }
        @rename($backup, $dataDir);
        echo "  restored original data/\n";
    } else {
        echo "  rename failed (parent not writable enough by PHP)\n";
    }
} else {
    echo "  parent dir is not writable by PHP — cannot recreate automatically.\n";
}

// ── Could not fix from PHP ─────────────────────────────────────────────────
echo "\n=========================================================\n";
echo "Could not fix automatically (PHP does not own the folder).\n";
echo "Use your hosting control panel's File Manager (or an FTP client):\n";
echo "  1. Go to the 'pp-integration' folder.\n";
echo "  2. Right-click the 'data' folder -> Change Permissions / CHMOD.\n";
echo "  3. Set it to 777 (read/write/execute for all).\n";
echo "  4. Also set the two .json files inside to 666.\n";
echo "Then reload onboard.php?debug=1 to confirm 'is_writable: yes'.\n";
echo "=========================================================\n";