<?php
class Downloadbackup extends MY_Controller
{
    var $db_onedev;

    var $backup_folder;
    var $load;
    var $output;
    function __construct()
    {
        parent::__construct();
        $this->backup_folder = "/data-sda/backup-db/";
        $this->load->helper(array('url', 'file')); // Load helper untuk URL dan file
    }

    public function index()
    {
        echo "CPONE DOWNLOAD BACKUP API";
    }
    public function list_backup()
    {
        if (!$this->isLogin) {
            $this->sys_error("Invalid Token");
            exit;
        }
        $cpones = glob($this->backup_folder . 'cpone/*');
        $cpone_logs = glob($this->backup_folder . 'cpone_log/*');
        // Recursive function to scan files
        $allFile = [];
        $files = [];
        $files["cpone"] = [];
        foreach ($cpones as $file) {
            if (is_file($file)) {
                $files["cpone"][] = [
                    'name' => basename($file),
                    'full_path' => $file,
                    'last_modified' => date("Y-m-d H:i:s", filemtime($file)),
                    'size' => $this->formatSize(filesize($file)),
                    'type' => 'cpone'
                ];
            }
        }

        $files["cpone_log"] = [];
        foreach ($cpone_logs as $file) {
            if (is_file($file)) {
                $files["cpone_log"][] = [
                    'name' => basename($file),
                    'full_path' => $file,
                    'last_modified' => date("Y-m-d H:i:s", filemtime($file)),
                    'size' => $this->formatSize(filesize($file)),
                    'type' => 'log'
                ];
            }
        }
        // Sort files by last modified date descending
        usort($files["cpone"], function ($a, $b) {
            return strtotime($b['last_modified']) - strtotime($a['last_modified']);
        });
        usort($files["cpone_log"], function ($a, $b) {
            return strtotime($b['last_modified']) - strtotime($a['last_modified']);
        });


        // Return JSON response
        // echo json_encode(["status" => "OK", "result" => $files]);
        $this->sys_ok($files);
    }

    private function formatSize($size)
    {
        $units = ['B', 'KB', 'MB', 'GB', 'TB'];
        $i = 0;
        while ($size >= 1024 && $i < count($units) - 1) {
            $size /= 1024;
            $i++;
        }
        return round($size, 2) . ' ' . $units[$i];
    }
    public function file()
    {
        if (!$this->isLogin) {
            $this->sys_error("Invalid Token");
            exit;
        }

        $prm = $this->sys_input;
        $path = $prm['path'];
        $userid = $this->sys_user["M_UserID"];

        if (!file_exists($path)) {
            $this->sys_error("File not exist");
            exit;
        }

        $filesize = filesize($path);
        $filename = basename($path);

        // Set header yang benar untuk mendukung progress
        header('Content-Type: application/octet-stream');
        header('Content-Disposition: attachment; filename="' . $filename . '"');
        header('Content-Length: ' . $filesize);
        header('Accept-Ranges: bytes');
        header('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');
        header('Cache-Control: post-check=0, pre-check=0', false);
        header('Pragma: no-cache');
        header('Access-Control-Expose-Headers: Content-Length, Content-Disposition, Accept-Ranges');

        // Matikan output buffering
        if (ob_get_level()) {
            ob_end_clean();
        }

        // Untuk file kecil (<10MB), gunakan readfile
        if ($filesize < 10 * 1024 * 1024) {
            readfile($path);
            exit;
        }

        // Untuk file besar, gunakan chunked transfer
        $handle = fopen($path, 'rb');
        $chunkSize = 8192; // Gunakan chunk yang lebih kecil (8KB)

        while (!feof($handle)) {
            echo fread($handle, $chunkSize);
            flush();
        }

        fclose($handle);
        exit;
    }
}