<?php

namespace Utils;

use Utils\SanitizeName;

use Utils\Debug;

class File {

    private $path = __DIR__ . '/../../data/';
    public $subPath;

    /**
     * Define a subpath for $path
     * example for file
     *   - imilo
     *   - region
     *   - local
     *
     * @var string
     */
    public $type;

    public $filterType = '*';

    private $mimePermit = [
        'png' => 'png',
        'jpg' => 'jpg',
        'bmp' => 'bmp',
        'gif' => 'gif',
        'webp' => 'webp'
    ];

    public function __construct() {
        return $this;
    }

    /*
    * @todo define list of authorized path
    */
    public function setPath($path) {
        $this->path = $path;
    }

    public function getFile($filename) {
        ob_end_clean();
        $path = realpath($this->path . $this->type);
        $file = $path . '/' . $filename;
        if (file_exists($file)) {
            header('Content-Description: File Transfer');
            header('Content-Type: ' . mime_content_type($file));
            header('Content-Disposition: attachment; filename="' . basename($file) . '"');
            header('Expires: 0');
            header('Cache-Control: must-revalidate');
            header('Pragma: public');
            header('Content-Length: ' . filesize($file));
            readfile($file);
            exit;
        }
    }

    public function getFileList(): array {
        $path = realpath($this->path . $this->type);

        foreach (glob($path . '/' . $this->filterType) as $filename) {
            $path_parts = pathinfo($filename);
            $fileList[] = [
                'file' => basename($filename),
                'path' => $this->subPath . '/' . $this->type . '/' . basename($filename),
                'type' => mime_content_type($filename),
                'ext' => $path_parts['extension'],
                'icon' => $this->defineIcon($path_parts['extension']),
                'size' => $this->human_filesize(filesize($filename)),
                'addTime' => date("d-m-Y H:i", filectime($filename))
            ];
        }

        if (empty($fileList)) {
            $fileList = [];
        }

        return $fileList;
    }

    private function defineIcon(string $mimeFile): string {
        if (array_key_exists($mimeFile, $this->mimePermit)) {
            return $this->mimePermit[$mimeFile];
        } else {
            return 'raw';
        }
    }

    private function human_filesize(int $bytes, int $decimals = 2): string {
        $factor = floor((strlen($bytes) - 1) / 3);
        if ($factor > 0) $sz = 'KMGT';

        return sprintf("%.{$decimals}f ", $bytes / pow(1024, $factor)) . @$sz[$factor - 1] . 'B';
    }

    public function saveFile($file, $replace = true): array {
        $fileType = strtolower(pathinfo($_FILES["fileName"]["name"], PATHINFO_EXTENSION));
        $fileName = strtolower(pathinfo($_FILES["fileName"]["name"], PATHINFO_FILENAME));
        $file = SanitizeName::sanitizeName($fileName);
        $cleanName = $file . '.' . $fileType;

        $target_file = $this->path . '/' . $this->type . '/' . $cleanName;


        /*
        * @todo permit replace
        */
        if (file_exists($target_file) && $replace === false) {
            return [
                'status' => 'danger',
                'msg' => 'Le fichier existe déjà.'
            ];
        }

        $upload_max_size = ini_get('upload_max_filesize');

        /*
        * @Todo return max upload
        */
        if ($_FILES["fileName"]["size"] > $upload_max_size) {
            return [
                'status' => 'danger',
                'msg' => 'Le fichier soumis est trop volumineux.'
            ];
        }

        if (!array_key_exists($fileType, $this->mimePermit)) {
            return [
                'status' => 'danger',
                'msg' => 'Les fichiers ' . $fileType . ' ne sont pas autorisés.'
            ];
        }

        if (move_uploaded_file($_FILES["fileName"]["tmp_name"], $target_file)) {
            return [
                'status' => 'success',
                'msg' => 'Le fichier ' . htmlspecialchars($cleanName) . ' à bien été envoyé.'
            ];
        } else {
            return [
                'status' => 'danger',
                'msg' => 'Une erreur c\'est produite.'
            ];
        }
    }

    public function deleteFile($filename) {
        $path = realpath($this->path . $this->type);
        $file = $path . '/' . $filename;

        if (file_exists($file)) {
            if (unlink($file)) {
                return [
                    'status' => 'success',
                    'msg' => 'Le fichier a été supprimé avec succès.'
                ];
            } else {
                return [
                    'status' => 'danger',
                    'msg' => 'Une erreur c\'est produite lors de la suppression du fichier.'
                ];
            }
        } else {
            return [
                'status' => 'danger',
                'msg' => 'Le fichier n\'existe pas.'
            ];
        }
    }
}