/*
 * jQuery File Upload Validation Plugin
 * https://github.com/blueimp/jQuery-File-Upload
 *
 * © Sebastian Tschan
 * https://blueimp.net
 *
 * Licensed under the MIT license:
 * https://opensource.org/licenses/MIT
 */

/* global define, require */

(function (factory) {
  'use strict';
  if (typeof define === 'function' && define.amd) {
    // Register as an anonymous AMD module:
    define(['jquery', './jquery.fileupload-process'], factory);
  } else if (typeof exports === 'object') {
    // Node/CommonJS:
    factory(require('jquery'), require('./jquery.fileupload-process'));
  } else {
    // Browser globals:
    factory(window.jQuery);
  }
})(function ($) {
  'use strict';

  // Append to the default processQueue:
  $.blueimp.fileupload.prototype.options.processQueue.push({
    action: 'validate',
    // Always trigger this action,
    // even if the previous action was rejected:
    always: true,
    // Options taken from the global options map:
    acceptFileTypes: '@',
    maxFileSize: '@',
    minFileSize: '@',
    maxNumberOfFiles: '@',
    disabled: '@disableValidation'
  });

  // The File Upload Validation plugin extends the fileupload widget
  // with file validation functionality:
  $.widget('blueimp.fileupload', $.blueimp.fileupload, {
    options: {
      /*
            // The regular expression for allowed file types, matches
            // against either file type or file name:
            acceptFileTypes: /(\.|\/)(gif|jpe?g|png)$/i,
            // The maximum allowed file size in bytes:
            maxFileSize: 10000000, // 10 MB
            // The minimum allowed file size in bytes:
            minFileSize: undefined, // No minimal file size
            // The limit of files to be uploaded:
            maxNumberOfFiles: 10,
            */

      // Function returning the current number of files,
      // has to be overriden for maxNumberOfFiles validation:
      getNumberOfFiles: $.noop,

      // Error and info messages:
      messages: {
        maxNumberOfFiles: 'Maximum number of files exceeded',
        acceptFileTypes: 'File type not allowed',
        maxFileSize: 'File is too large',
        minFileSize: 'File is too small'
      }
    },

    processActions: {
      validate: function (data, options) {
        if (options.disabled) {
          return data;
        }
        // eslint-disable-next-line new-cap
        var dfd = $.Deferred(),
          settings = this.options,
          file = data.files[data.index],
          fileSize;
        if (options.minFileSize || options.maxFileSize) {
          fileSize = file.size;
        }
        if (
          $.type(options.maxNumberOfFiles) === 'number' &&
          (settings.getNumberOfFiles() || 0) + data.files.length >
            options.maxNumberOfFiles
        ) {
          file.error = settings.i18n('maxNumberOfFiles');
        } else if (
          options.acceptFileTypes &&
          !(
            options.acceptFileTypes.test(file.type) ||
            options.acceptFileTypes.test(file.name)
          )
        ) {
          file.error = settings.i18n('acceptFileTypes');
        } else if (fileSize > options.maxFileSize) {
          file.error = settings.i18n('maxFileSize');
        } else if (
          $.type(fileSize) === 'number' &&
          fileSize < options.minFileSize
        ) {
          file.error = settings.i18n('minFileSize');
        } else {
          delete file.error;
        }
        if (file.error || data.files.error) {
          data.files.error = true;
          dfd.rejectWith(this, [data]);
        } else {
          dfd.resolveWith(this, [data]);
        }
        return dfd.promise();
      }
    }
  });
});
