<?php

namespace ProfilePress\Core\Classes;

use WP_Error;

/**
 * @package ProfilePress custom file upload PHP class
 */
class FileUploader
{
    /** init poop */
    public static function init()
    {
        $result = array();

        if (empty($_FILES)) return $result;

        // remove registration and edit profile avatar and cover photo from files uploaded to be processed.
        $skip = ['wpua-file', 'reg_avatar', 'eup_avatar', 'reg_cover_image', 'eup_cover_image'];

        $valid_custom_usermeta = array_keys(ppress_custom_fields_key_value_pair(true));

        foreach ($_FILES as $field_key => $uploaded_file_array) {

            if ( ! in_array($field_key, $skip) && in_array($field_key, $valid_custom_usermeta) && ! empty($uploaded_file_array['name'])) {
                $result[$field_key] = self::process($uploaded_file_array, $field_key);
            }
        }

        return $result;
    }

    /**
     * Upload the file
     *
     * @param $file
     *
     * @return bool|WP_Error
     */
    public static function process($file, $field_key)
    {
        /**
         * Fires before image is process for validation and uploading
         */
        do_action('ppress_before_saving_file', $file, $field_key);

        // validate all uploaded file but only return error for file with hidden "required-"field-key" field POSTed data.
        // i.e if the file has the "required" shortcode attribute.
        // added in "reg_custom_profile_field" in registration shortcode parser.

        if ($file["error"] !== 0) {
            self::error_file_logger($file, self::codeToMessage($file["error"]));
            if (isset($_POST["required-{$field_key}"])) {
                return new WP_Error(
                    'file_error',
                    apply_filters('ppress_file_unexpected_error',
                        esc_html__('Unexpected error with file upload, Please try again.', 'wp-user-avatar'),
                        $field_key
                    )
                );
            }

            return false;
        }

        // filesize in megabyte. default is 10MB
        $file_size = apply_filters('ppress_file_upload_size', 10, $field_key);

        if ($file["size"] > ($file_size * 1000000)) {
            return new WP_Error('file_too_large', apply_filters(
                    'ppress_file_too_large',
                    sprintf(
                        esc_html__('Uploaded file is greater than the allowed sized of %s', 'wp-user-avatar'),
                        "$file_size MB"
                    ),
                    $field_key
                )
            );
        }

        // array of allowed file extensions
        $extensions = PROFILEPRESS_sql::get_field_option_values($field_key);

        $allowed_extensions = array_filter(array_map('trim', explode(',', $extensions)), function ($value) {
            return ! empty($value);
        });

        if (empty($allowed_extensions)) $allowed_extensions = [];

        $filename = $file['name'];

        $mime_check = ppress_check_type_and_ext($file, [], $allowed_extensions);

        if (is_wp_error($mime_check)) {

            return new WP_Error('invalid_file', $filename . ' ' . apply_filters('ppress_invalid_file_error', esc_html__('appears to be of an invalid file format. Please try again.', 'wp-user-avatar'), $field_key));
        }

        $file_upload_dir = apply_filters('ppress_file_upload_dir', PPRESS_FILE_UPLOAD_DIR, $field_key);

        // ensure a safe filename
        $file_name = preg_replace("/[^A-Z0-9._-]/i", "_", $filename);

        // don't overwrite an existing file
        $i                = 0;
        $file_exist_parts = pathinfo($file_name);
        while (file_exists($file_upload_dir . $file_name)) {
            $i++;
            $file_name = $file_exist_parts["filename"] . "-" . $i . "." . $file_exist_parts["extension"];
        }

        // does file uploads folder exist? if NO, create it.
        if ( ! file_exists($file_upload_dir)) {
            mkdir($file_upload_dir, 0755);
        }

        // create index.php file in file uploads folder
        if ( ! file_exists($file_upload_dir . '/index.php')) {
            ppress_create_index_file($file_upload_dir);
        }

        // preserve file from temporary directory
        $success = @move_uploaded_file($file["tmp_name"], $file_upload_dir . $file_name);

        if ( ! $success) {
            return new WP_Error ('save_error',
                sprintf(__("Unable to save %s, please try again.", 'wp-user-avatar'), $file_name));
        }

        // set proper permissions on the new file
        chmod($file_upload_dir . $file_name, 0644);

        /**
         * Fires after file have been saved
         *
         * @param string $file_name uploaded image url
         */
        do_action('ppress_after_saving_file', $file_name, $file_upload_dir);

        return $file_name;
    }

    /**
     * Error message of file upload converted from errorCode to readable message.
     *
     * @param int $code
     *
     * @return string
     */
    public static function codeToMessage($code)
    {
        switch ($code) {
            case UPLOAD_ERR_INI_SIZE:
                $message = __("The uploaded file exceeds the upload_max_filesize directive in php.ini", 'wp-user-avatar');
                break;
            case UPLOAD_ERR_FORM_SIZE:
                $message = __("The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form", 'wp-user-avatar');
                break;
            case UPLOAD_ERR_PARTIAL:
                $message = __("The uploaded file was only partially uploaded", 'wp-user-avatar');
                break;
            case UPLOAD_ERR_NO_FILE:
                $message = __("No file was uploaded", 'wp-user-avatar');
                break;
            case UPLOAD_ERR_NO_TMP_DIR:
                $message = __("Missing a temporary folder", 'wp-user-avatar');
                break;
            case UPLOAD_ERR_CANT_WRITE:
                $message = __("Failed to write file to disk", 'wp-user-avatar');
                break;
            case UPLOAD_ERR_EXTENSION:
                $message = __("File upload stopped by extension", 'wp-user-avatar');
                break;

            default:
                $message = "Unknown upload error";
                break;
        }

        return $message;
    }


    /**
     * @param array $file_array global $_File['field_key'] of the file.
     * @param string $error_message
     */
    public static function error_file_logger($file_array, $error_message)
    {
        $error = $error_message . ' => ' . json_encode($file_array);

        ppress_log_error($error);
    }
}