#!/usr/bin/env php
<?php
/**
 * Cleanup Orphan Uploads
 *
 * Removes uploaded files that are no longer associated with any ticket.
 * Run periodically via cron: 0 2 * * * php /path/to/cleanup_orphan_uploads.php
 */

require_once dirname(__DIR__) . '/config/config.php';

$conn = new mysqli(
    $GLOBALS['config']['DB_HOST'],
    $GLOBALS['config']['DB_USER'],
    $GLOBALS['config']['DB_PASS'],
    $GLOBALS['config']['DB_NAME']
);

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

$uploadsDir = dirname(__DIR__) . '/uploads';
$dryRun = in_array('--dry-run', $argv);

if ($dryRun) {
    echo "DRY RUN MODE - No files will be deleted\n";
}

echo "Scanning uploads directory: $uploadsDir\n";

// Get all valid ticket IDs from database
$ticketIds = [];
$result = $conn->query("SELECT ticket_id FROM tickets");
while ($row = $result->fetch_assoc()) {
    $ticketIds[] = $row['ticket_id'];
}
echo "Found " . count($ticketIds) . " tickets in database\n";

// Get all attachment records
$attachments = [];
$result = $conn->query("SELECT ticket_id, filename FROM ticket_attachments");
if ($result) {
    while ($row = $result->fetch_assoc()) {
        $key = $row['ticket_id'] . '/' . $row['filename'];
        $attachments[$key] = true;
    }
}
echo "Found " . count($attachments) . " attachment records in database\n";

// Scan uploads directory
$orphanedFolders = [];
$orphanedFiles = [];
$totalSize = 0;

$ticketDirs = glob($uploadsDir . '/*', GLOB_ONLYDIR);
foreach ($ticketDirs as $ticketDir) {
    $ticketId = basename($ticketDir);

    // Skip non-ticket directories
    if (!preg_match('/^\d{9}$/', $ticketId)) {
        continue;
    }

    // Check if ticket exists
    if (!in_array($ticketId, $ticketIds)) {
        // Ticket doesn't exist - entire folder is orphaned
        $orphanedFolders[] = $ticketDir;
        $folderSize = 0;
        foreach (glob($ticketDir . '/*') as $file) {
            if (is_file($file)) {
                $folderSize += filesize($file);
            }
        }
        $totalSize += $folderSize;
        echo "Orphan folder (ticket deleted): $ticketDir (" . formatBytes($folderSize) . ")\n";
        continue;
    }

    // Check individual files
    $files = glob($ticketDir . '/*');
    foreach ($files as $file) {
        if (is_file($file)) {
            $filename = basename($file);
            $key = $ticketId . '/' . $filename;

            if (!isset($attachments[$key])) {
                $orphanedFiles[] = $file;
                $fileSize = filesize($file);
                $totalSize += $fileSize;
                echo "Orphan file (no DB record): $file (" . formatBytes($fileSize) . ")\n";
            }
        }
    }
}

echo "\n=== Summary ===\n";
echo "Orphaned folders: " . count($orphanedFolders) . "\n";
echo "Orphaned files: " . count($orphanedFiles) . "\n";
echo "Total size to recover: " . formatBytes($totalSize) . "\n";

if (!$dryRun && ($orphanedFolders || $orphanedFiles)) {
    echo "\nDeleting orphaned items...\n";

    foreach ($orphanedFiles as $file) {
        if (unlink($file)) {
            echo "Deleted: $file\n";
        } else {
            echo "Failed to delete: $file\n";
        }
    }

    foreach ($orphanedFolders as $folder) {
        deleteDirectory($folder);
        echo "Deleted folder: $folder\n";
    }

    echo "Cleanup complete!\n";
} elseif ($dryRun) {
    echo "\nRun without --dry-run to delete these items.\n";
} else {
    echo "\nNo orphaned items found.\n";
}

$conn->close();

function formatBytes($bytes) {
    if ($bytes >= 1073741824) {
        return number_format($bytes / 1073741824, 2) . ' GB';
    } elseif ($bytes >= 1048576) {
        return number_format($bytes / 1048576, 2) . ' MB';
    } elseif ($bytes >= 1024) {
        return number_format($bytes / 1024, 2) . ' KB';
    } else {
        return $bytes . ' bytes';
    }
}

function deleteDirectory($dir) {
    if (!is_dir($dir)) return;

    $files = array_diff(scandir($dir), ['.', '..']);
    foreach ($files as $file) {
        $path = "$dir/$file";
        is_dir($path) ? deleteDirectory($path) : unlink($path);
    }
    rmdir($dir);
}