/*
 * jQuery File Upload User Interface Plugin
 * https://github.com/blueimp/jQuery-File-Upload
 *
 * Copyright 2010, 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',
      'blueimp-tmpl',
      './jquery.fileupload-image',
      './jquery.fileupload-audio',
      './jquery.fileupload-video',
      './jquery.fileupload-validate'
    ], factory);
  } else if (typeof exports === 'object') {
    // Node/CommonJS:
    factory(
      require('jquery'),
      require('blueimp-tmpl'),
      require('./jquery.fileupload-image'),
      require('./jquery.fileupload-audio'),
      require('./jquery.fileupload-video'),
      require('./jquery.fileupload-validate')
    );
  } else {
    // Browser globals:
    factory(window.jQuery, window.tmpl);
  }
})(function($, tmpl) {
  'use strict';

  $.blueimp.fileupload.prototype._specialOptions.push(
    'filesContainer',
    'uploadTemplateId',
    'downloadTemplateId'
  );

  // The UI version extends the file upload widget
  // and adds complete user interface interaction:
  $.widget('blueimp.fileupload', $.blueimp.fileupload, {
    options: {
      // By default, files added to the widget are uploaded as soon
      // as the user clicks on the start buttons. To enable automatic
      // uploads, set the following option to true:
      autoUpload: false,
      // The ID of the upload template:
      uploadTemplateId: 'template-upload',
      // The ID of the download template:
      downloadTemplateId: 'template-download',
      // The container for the list of files. If undefined, it is set to
      // an element with class "files" inside of the widget element:
      filesContainer: undefined,
      // By default, files are appended to the files container.
      // Set the following option to true, to prepend files instead:
      prependFiles: false,
      // The expected data type of the upload response, sets the dataType
      // option of the $.ajax upload requests:
      dataType: 'json',

      // Error and info messages:
      messages: {
        unknownError: 'Unknown error'
      },

      // Function returning the current number of files,
      // used by the maxNumberOfFiles validation:
      getNumberOfFiles: function() {
        return this.filesContainer.children().not('.processing').length;
      },

      // Callback to retrieve the list of files from the server response:
      getFilesFromResponse: function(data) {
        if (data.result && $.isArray(data.result.files)) {
          return data.result.files;
        }
        return [];
      },

      // The add callback is invoked as soon as files are added to the fileupload
      // widget (via file input selection, drag & drop or add API call).
      // See the basic file upload widget for more information:
      add: function(e, data) {
        if (e.isDefaultPrevented()) {
          return false;
        }
        var $this = $(this),
          that = $this.data('blueimp-fileupload') || $this.data('fileupload'),
          options = that.options;
        data.context = that
          ._renderUpload(data.files)
          .data('data', data)
          .addClass('processing');
        options.filesContainer[options.prependFiles ? 'prepend' : 'append'](
          data.context
        );
        that._forceReflow(data.context);
        that._transition(data.context);
        data
          .process(function() {
            return $this.fileupload('process', data);
          })
          .always(function() {
            data.context
              .each(function(index) {
                $(this)
                  .find('.size')
                  .text(that._formatFileSize(data.files[index].size));
              })
              .removeClass('processing');
            that._renderPreviews(data);
          })
          .done(function() {
            data.context.find('.edit,.start').prop('disabled', false);
            if (
              that._trigger('added', e, data) !== false &&
              (options.autoUpload || data.autoUpload) &&
              data.autoUpload !== false
            ) {
              data.submit();
            }
          })
          .fail(function() {
            if (data.files.error) {
              data.context.each(function(index) {
                var error = data.files[index].error;
                if (error) {
                  $(this)
                    .find('.error')
                    .text(error);
                }
              });
            }
          });
      },
      // Callback for the start of each file upload request:
      send: function(e, data) {
        if (e.isDefaultPrevented()) {
          return false;
        }
        var that =
          $(this).data('blueimp-fileupload') || $(this).data('fileupload');
        if (
          data.context &&
          data.dataType &&
          data.dataType.substr(0, 6) === 'iframe'
        ) {
          // Iframe Transport does not support progress events.
          // In lack of an indeterminate progress bar, we set
          // the progress to 100%, showing the full animated bar:
          data.context
            .find('.progress')
            .addClass(!$.support.transition && 'progress-animated')
            .attr('aria-valuenow', 100)
            .children()
            .first()
            .css('width', '100%');
        }
        return that._trigger('sent', e, data);
      },
      // Callback for successful uploads:
      done: function(e, data) {
        if (e.isDefaultPrevented()) {
          return false;
        }
        var that =
            $(this).data('blueimp-fileupload') || $(this).data('fileupload'),
          getFilesFromResponse =
            data.getFilesFromResponse || that.options.getFilesFromResponse,
          files = getFilesFromResponse(data),
          template,
          deferred;
        if (data.context) {
          data.context.each(function(index) {
            var file = files[index] || { error: 'Empty file upload result' };
            deferred = that._addFinishedDeferreds();
            that._transition($(this)).done(function() {
              var node = $(this);
              template = that._renderDownload([file]).replaceAll(node);
              that._forceReflow(template);
              that._transition(template).done(function() {
                data.context = $(this);
                that._trigger('completed', e, data);
                that._trigger('finished', e, data);
                deferred.resolve();
              });
            });
          });
        } else {
          template = that
            ._renderDownload(files)
            [that.options.prependFiles ? 'prependTo' : 'appendTo'](
              that.options.filesContainer
            );
          that._forceReflow(template);
          deferred = that._addFinishedDeferreds();
          that._transition(template).done(function() {
            data.context = $(this);
            that._trigger('completed', e, data);
            that._trigger('finished', e, data);
            deferred.resolve();
          });
        }
      },
      // Callback for failed (abort or error) uploads:
      fail: function(e, data) {
        if (e.isDefaultPrevented()) {
          return false;
        }
        var that =
            $(this).data('blueimp-fileupload') || $(this).data('fileupload'),
          template,
          deferred;
        if (data.context) {
          data.context.each(function(index) {
            if (data.errorThrown !== 'abort') {
              var file = data.files[index];
              file.error =
                file.error || data.errorThrown || data.i18n('unknownError');
              deferred = that._addFinishedDeferreds();
              that._transition($(this)).done(function() {
                var node = $(this);
                template = that._renderDownload([file]).replaceAll(node);
                that._forceReflow(template);
                that._transition(template).done(function() {
                  data.context = $(this);
                  that._trigger('failed', e, data);
                  that._trigger('finished', e, data);
                  deferred.resolve();
                });
              });
            } else {
              deferred = that._addFinishedDeferreds();
              that._transition($(this)).done(function() {
                $(this).remove();
                that._trigger('failed', e, data);
                that._trigger('finished', e, data);
                deferred.resolve();
              });
            }
          });
        } else if (data.errorThrown !== 'abort') {
          data.context = that
            ._renderUpload(data.files)
            [that.options.prependFiles ? 'prependTo' : 'appendTo'](
              that.options.filesContainer
            )
            .data('data', data);
          that._forceReflow(data.context);
          deferred = that._addFinishedDeferreds();
          that._transition(data.context).done(function() {
            data.context = $(this);
            that._trigger('failed', e, data);
            that._trigger('finished', e, data);
            deferred.resolve();
          });
        } else {
          that._trigger('failed', e, data);
          that._trigger('finished', e, data);
          that._addFinishedDeferreds().resolve();
        }
      },
      // Callback for upload progress events:
      progress: function(e, data) {
        if (e.isDefaultPrevented()) {
          return false;
        }
        var progress = Math.floor((data.loaded / data.total) * 100);
        if (data.context) {
          data.context.each(function() {
            $(this)
              .find('.progress')
              .attr('aria-valuenow', progress)
              .children()
              .first()
              .css('width', progress + '%');
          });
        }
      },
      // Callback for global upload progress events:
      progressall: function(e, data) {
        if (e.isDefaultPrevented()) {
          return false;
        }
        var $this = $(this),
          progress = Math.floor((data.loaded / data.total) * 100),
          globalProgressNode = $this.find('.fileupload-progress'),
          extendedProgressNode = globalProgressNode.find('.progress-extended');
        if (extendedProgressNode.length) {
          extendedProgressNode.html(
            (
              $this.data('blueimp-fileupload') || $this.data('fileupload')
            )._renderExtendedProgress(data)
          );
        }
        globalProgressNode
          .find('.progress')
          .attr('aria-valuenow', progress)
          .children()
          .first()
          .css('width', progress + '%');
      },
      // Callback for uploads start, equivalent to the global ajaxStart event:
      start: function(e) {
        if (e.isDefaultPrevented()) {
          return false;
        }
        var that =
          $(this).data('blueimp-fileupload') || $(this).data('fileupload');
        that._resetFinishedDeferreds();
        that._transition($(this).find('.fileupload-progress')).done(function() {
          that._trigger('started', e);
        });
      },
      // Callback for uploads stop, equivalent to the global ajaxStop event:
      stop: function(e) {
        if (e.isDefaultPrevented()) {
          return false;
        }
        var that =
            $(this).data('blueimp-fileupload') || $(this).data('fileupload'),
          deferred = that._addFinishedDeferreds();
        $.when.apply($, that._getFinishedDeferreds()).done(function() {
          that._trigger('stopped', e);
        });
        that._transition($(this).find('.fileupload-progress')).done(function() {
          $(this)
            .find('.progress')
            .attr('aria-valuenow', '0')
            .children()
            .first()
            .css('width', '0%');
          $(this)
            .find('.progress-extended')
            .html('&nbsp;');
          deferred.resolve();
        });
      },
      processstart: function(e) {
        if (e.isDefaultPrevented()) {
          return false;
        }
        $(this).addClass('fileupload-processing');
      },
      processstop: function(e) {
        if (e.isDefaultPrevented()) {
          return false;
        }
        $(this).removeClass('fileupload-processing');
      },
      // Callback for file deletion:
      destroy: function(e, data) {
        if (e.isDefaultPrevented()) {
          return false;
        }
        var that =
            $(this).data('blueimp-fileupload') || $(this).data('fileupload'),
          removeNode = function() {
            that._transition(data.context).done(function() {
              $(this).remove();
              that._trigger('destroyed', e, data);
            });
          };
        if (data.url) {
          data.dataType = data.dataType || that.options.dataType;
          $.ajax(data)
            .done(removeNode)
            .fail(function() {
              that._trigger('destroyfailed', e, data);
            });
        } else {
          removeNode();
        }
      }
    },

    _resetFinishedDeferreds: function() {
      this._finishedUploads = [];
    },

    _addFinishedDeferreds: function(deferred) {
      // eslint-disable-next-line new-cap
      var promise = deferred || $.Deferred();
      this._finishedUploads.push(promise);
      return promise;
    },

    _getFinishedDeferreds: function() {
      return this._finishedUploads;
    },

    // Link handler, that allows to download files
    // by drag & drop of the links to the desktop:
    _enableDragToDesktop: function() {
      var link = $(this),
        url = link.prop('href'),
        name = link.prop('download'),
        type = 'application/octet-stream';
      link.bind('dragstart', function(e) {
        try {
          e.originalEvent.dataTransfer.setData(
            'DownloadURL',
            [type, name, url].join(':')
          );
        } catch (ignore) {
          // Ignore exceptions
        }
      });
    },

    _formatFileSize: function(bytes) {
      if (typeof bytes !== 'number') {
        return '';
      }
      if (bytes >= 1000000000) {
        return (bytes / 1000000000).toFixed(2) + ' GB';
      }
      if (bytes >= 1000000) {
        return (bytes / 1000000).toFixed(2) + ' MB';
      }
      return (bytes / 1000).toFixed(2) + ' KB';
    },

    _formatBitrate: function(bits) {
      if (typeof bits !== 'number') {
        return '';
      }
      if (bits >= 1000000000) {
        return (bits / 1000000000).toFixed(2) + ' Gbit/s';
      }
      if (bits >= 1000000) {
        return (bits / 1000000).toFixed(2) + ' Mbit/s';
      }
      if (bits >= 1000) {
        return (bits / 1000).toFixed(2) + ' kbit/s';
      }
      return bits.toFixed(2) + ' bit/s';
    },

    _formatTime: function(seconds) {
      var date = new Date(seconds * 1000),
        days = Math.floor(seconds / 86400);
      days = days ? days + 'd ' : '';
      return (
        days +
        ('0' + date.getUTCHours()).slice(-2) +
        ':' +
        ('0' + date.getUTCMinutes()).slice(-2) +
        ':' +
        ('0' + date.getUTCSeconds()).slice(-2)
      );
    },

    _formatPercentage: function(floatValue) {
      return (floatValue * 100).toFixed(2) + ' %';
    },

    _renderExtendedProgress: function(data) {
      return (
        this._formatBitrate(data.bitrate) +
        ' | ' +
        this._formatTime(((data.total - data.loaded) * 8) / data.bitrate) +
        ' | ' +
        this._formatPercentage(data.loaded / data.total) +
        ' | ' +
        this._formatFileSize(data.loaded) +
        ' / ' +
        this._formatFileSize(data.total)
      );
    },

    _renderTemplate: function(func, files) {
      if (!func) {
        return $();
      }
      var result = func({
        files: files,
        formatFileSize: this._formatFileSize,
        options: this.options
      });
      if (result instanceof $) {
        return result;
      }
      return $(this.options.templatesContainer)
        .html(result)
        .children();
    },

    _renderPreviews: function(data) {
      data.context.find('.preview').each(function(index, elm) {
        $(elm)
          .empty()
          .append(data.files[index].preview);
      });
    },

    _renderUpload: function(files) {
      return this._renderTemplate(this.options.uploadTemplate, files);
    },

    _renderDownload: function(files) {
      return this._renderTemplate(this.options.downloadTemplate, files)
        .find('a[download]')
        .each(this._enableDragToDesktop)
        .end();
    },

    _editHandler: function(e) {
      e.preventDefault();
      if (!this.options.edit) return;
      var that = this,
        button = $(e.currentTarget),
        template = button.closest('.template-upload'),
        data = template.data('data'),
        index = button.data().index;
      this.options.edit(data.files[index]).then(function(file) {
        if (!file) return;
        data.files[index] = file;
        data.context.addClass('processing');
        template.find('.edit,.start').prop('disabled', true);
        $(that.element)
          .fileupload('process', data)
          .always(function() {
            template
              .find('.size')
              .text(that._formatFileSize(data.files[index].size));
            data.context.removeClass('processing');
            that._renderPreviews(data);
          })
          .done(function() {
            template.find('.edit,.start').prop('disabled', false);
          })
          .fail(function() {
            template.find('.edit').prop('disabled', false);
            var error = data.files[index].error;
            if (error) {
              template.find('.error').text(error);
            }
          });
      });
    },

    _startHandler: function(e) {
      e.preventDefault();
      var button = $(e.currentTarget),
        template = button.closest('.template-upload'),
        data = template.data('data');
      button.prop('disabled', true);
      if (data && data.submit) {
        data.submit();
      }
    },

    _cancelHandler: function(e) {
      e.preventDefault();
      var template = $(e.currentTarget).closest(
          '.template-upload,.template-download'
        ),
        data = template.data('data') || {};
      data.context = data.context || template;
      if (data.abort) {
        data.abort();
      } else {
        data.errorThrown = 'abort';
        this._trigger('fail', e, data);
      }
    },

    _deleteHandler: function(e) {
      e.preventDefault();
      var button = $(e.currentTarget);
      this._trigger(
        'destroy',
        e,
        $.extend(
          {
            context: button.closest('.template-download'),
            type: 'DELETE'
          },
          button.data()
        )
      );
    },

    _forceReflow: function(node) {
      return $.support.transition && node.length && node[0].offsetWidth;
    },

    _transition: function(node) {
      // eslint-disable-next-line new-cap
      var dfd = $.Deferred();
      if (
        $.support.transition &&
        node.hasClass('fade') &&
        node.is(':visible')
      ) {
        node
          .bind($.support.transition.end, function(e) {
            // Make sure we don't respond to other transitions events
            // in the container element, e.g. from button elements:
            if (e.target === node[0]) {
              node.off($.support.transition.end);
              dfd.resolveWith(node);
            }
          })
          .toggleClass('in');
      } else {
        node.toggleClass('in');
        dfd.resolveWith(node);
      }
      return dfd;
    },

    _initButtonBarEventHandlers: function() {
      var fileUploadButtonBar = this.element.find('.fileupload-buttonbar'),
        filesList = this.options.filesContainer;
      this._on(fileUploadButtonBar.find('.start'), {
        click: function(e) {
          e.preventDefault();
          filesList.find('.start').trigger('click');
        }
      });
      this._on(fileUploadButtonBar.find('.cancel'), {
        click: function(e) {
          e.preventDefault();
          filesList.find('.cancel').trigger('click');
        }
      });
      this._on(fileUploadButtonBar.find('.delete'), {
        click: function(e) {
          e.preventDefault();
          filesList
            .find('.toggle:checked')
            .closest('.template-download')
            .find('.delete')
            .trigger('click');
          fileUploadButtonBar.find('.toggle').prop('checked', false);
        }
      });
      this._on(fileUploadButtonBar.find('.toggle'), {
        change: function(e) {
          filesList
            .find('.toggle')
            .prop('checked', $(e.currentTarget).is(':checked'));
        }
      });
    },

    _destroyButtonBarEventHandlers: function() {
      this._off(
        this.element
          .find('.fileupload-buttonbar')
          .find('.start, .cancel, .delete'),
        'click'
      );
      this._off(this.element.find('.fileupload-buttonbar .toggle'), 'change.');
    },

    _initEventHandlers: function() {
      this._super();
      this._on(this.options.filesContainer, {
        'click .edit': this._editHandler,
        'click .start': this._startHandler,
        'click .cancel': this._cancelHandler,
        'click .delete': this._deleteHandler
      });
      this._initButtonBarEventHandlers();
    },

    _destroyEventHandlers: function() {
      this._destroyButtonBarEventHandlers();
      this._off(this.options.filesContainer, 'click');
      this._super();
    },

    _enableFileInputButton: function() {
      this.element
        .find('.fileinput-button input')
        .prop('disabled', false)
        .parent()
        .removeClass('disabled');
    },

    _disableFileInputButton: function() {
      this.element
        .find('.fileinput-button input')
        .prop('disabled', true)
        .parent()
        .addClass('disabled');
    },

    _initTemplates: function() {
      var options = this.options;
      options.templatesContainer = this.document[0].createElement(
        options.filesContainer.prop('nodeName')
      );
      if (tmpl) {
        if (options.uploadTemplateId) {
          options.uploadTemplate = tmpl(options.uploadTemplateId);
        }
        if (options.downloadTemplateId) {
          options.downloadTemplate = tmpl(options.downloadTemplateId);
        }
      }
    },

    _initFilesContainer: function() {
      var options = this.options;
      if (options.filesContainer === undefined) {
        options.filesContainer = this.element.find('.files');
      } else if (!(options.filesContainer instanceof $)) {
        options.filesContainer = $(options.filesContainer);
      }
    },

    _initSpecialOptions: function() {
      this._super();
      this._initFilesContainer();
      this._initTemplates();
    },

    _create: function() {
      this._super();
      this._resetFinishedDeferreds();
      if (!$.support.fileInput) {
        this._disableFileInputButton();
      }
    },

    enable: function() {
      var wasDisabled = false;
      if (this.options.disabled) {
        wasDisabled = true;
      }
      this._super();
      if (wasDisabled) {
        this.element.find('input, button').prop('disabled', false);
        this._enableFileInputButton();
      }
    },

    disable: function() {
      if (!this.options.disabled) {
        this.element.find('input, button').prop('disabled', true);
        this._disableFileInputButton();
      }
      this._super();
    }
  });
});
