// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
(function($, cloudStack, _l) {
  /**
   * Notification handling
   */
  var notifications = {
    activeTasks: [],
    cornerAlert: function(args, options) {
      if (!options) options = {};

      var $container = $('#container'); // Put in main container box
      var $cornerAlert = $('<div>').addClass('notification corner-alert')
            .hide()
            .appendTo($container)
            .append(
              $('<div>').addClass('title').append(
                $('<span>').html(
                  options.error ? options.error : _l('label.task.completed')
                )
              )
            )
            .append(
              $('<div>').addClass('message')
                .append(
                  $('<span>').html(_l(args.message))
                )
            );

      if (options.error) {
        $cornerAlert.addClass('error');
      }

      return $cornerAlert
        .css({
          opacity: 0,
          position: 'absolute',
          top: $($container).height(),
          left: $($container).width() - $cornerAlert.width()
        })
        .animate({
          opacity: 1,
          top: $container.height() - $cornerAlert.height()
        }, {
          complete: function() {
            setTimeout(function() {
              $cornerAlert.fadeOut('fast', function() {
                $cornerAlert.remove();
              });
            }, 5000);
          }
        })
        .show();
    },
    add: function(args, $popup, $total) {
      var currentTotal = parseInt($total.html());
      var newTotal = currentTotal + 1;
      var desc = args.desc;
      var section = $('html body')
            .find('[cloudStack-container]')
            .data('cloudStack-args')
            .sections[args.section];
      var _custom = args._custom;

      var $item = $('<li>')
            .append(
              $('<span>').html(_l(args.desc))
            )
            .append(
              $('<div>').addClass('remove')
            );
      var additionalComplete = args.complete;

      // Get information for specified section path
      $item.data('notification-section', args.section);
      $item.data('notification-custom', _custom);
      $popup.find('ul').append($item);
      $total.html(newTotal);
      $total.parent().addClass('pending');
      $item.addClass('pending');

      // Setup timer
      var pollTimer = setInterval(function() {
        args.poll({
          _custom: _custom,
          pollTimer: pollTimer,
          complete: function(args) {
            clearInterval(pollTimer);

            notifications.cornerAlert({ message: $item.html() });
            notifications.activeTasks.pop(pollTimer);
            $item.removeClass('pending');

            if (additionalComplete) additionalComplete();
          },
          incomplete: function(args) {},
          error: function(args) {
            if (args.message) {
              cloudStack.dialog.notice({ message: _s(args.message) });
            }

            clearInterval(pollTimer);
            notifications.activeTasks.pop(pollTimer);
            notifications.cornerAlert({ message: $item.html() }, {
              error: _l('label.error')
            });
            $item.removeClass('pending').addClass('error');

            if (additionalComplete) additionalComplete();
          }
        });
      }, args.interval);
      notifications.activeTasks.push(pollTimer);

      return $total;
    },

    /**
     * Set total to 0
     */
    resetTotal: function($popup) {
      var $total = $popup.data('notifications-attach-to').find('div.total span');
      var $items = $popup.find('ul li');
      var total = $items.size();
      var completed = $items.filter(':not(.pending)').size();
      var newTotal = total - completed;

      if (newTotal < 0) newTotal = completed;

      $total.html(newTotal);

      if (!newTotal)
        $total.parent().removeClass('pending');
    },

    /**
     * Remove item from notification list
     */
    removeItem: function($popup, $item) {
      if ($item.closest('li').hasClass('pending')) return false;

      $item.remove();

      return true;
    },

    /**
     * Remove all completed notifications
     */
    clear: function($popup) {
      $popup.find('ul li').each(function() {
        var $item = $(this);

        if (!$item.hasClass('pending')) {
          notifications.removeItem($popup, $item);
        }
      });
    },
    popup: {
      create: function($attachTo) {
        var $popup = $('<div>')
              .addClass('notification-box')
              .append(
                // Header
                $('<h3>').html(_l('label.notifications'))
              )
              .append(
                // Container
                $('<div>').addClass('container')
                  .append(
                    // Notification list
                    $('<ul>')
                  )
              )
              .append(
                // Buttons
                $('<div>').addClass('buttons')
                  .append(
                    // Clear list
                    $('<div>').addClass('button clear-list')
                      .append(
                        $('<span>').html(_l('label.clear.list'))
                      )
                  )
                  .append(
                    $('<div>').addClass('button close')
                      .append(
                        $('<span>').html(_l('label.close'))
                      )
                  )
              )
              .css({ position: 'absolute' })
              .data('notifications-attach-to', $attachTo)
              .hide();

        if (!$attachTo.hasClass('notifications')) $attachTo.addClass('notifications');
        $attachTo.data('notifications-popup', $popup);

        return $popup;
      },
      show: function($popup, $attachTo) {
        notifications.resetTotal($popup);
        return notifications.popup.reposition($popup, $attachTo)
          .overlay({
            closeAction: function() {
              notifications.popup.hide($popup);
            }
          })
          .fadeIn();
      },
      hide: function($popup) {
        $popup.fadeOut();
      },
      reposition: function($popup, $attachTo) {
        return $popup
          .css({
            zIndex: 10000,
            top: $attachTo.offset().top + $attachTo.height() + 10,
            left: $attachTo.offset().left - $attachTo.width()
          });
      }
    }
  };

  /**
   * Define notification widget -- this is basically represented in a
   * notifications icon, that contains a pop-up list of notifications
   */
  $.fn.notifications = function(method, args) {
    var $attachTo = this;
    var $total = $attachTo.find('div.total span');
    var $popup;

    var init = function() {
      $popup = notifications.popup.create($attachTo).appendTo('html body');
    };

    if (method == 'add')
      notifications.add(args, $attachTo.data('notifications-popup'), $total);
    else
      init();

    return this;
  };

  /**
   * Notifications UI helpers
   */
  cloudStack.ui.notifications = {
    add: function(notification, success, successArgs, error, errorArgs) {
      if (!notification) {
        success(successArgs);

        return false;
      };

      var $notifications = $('div.notifications');

      if (!notification.poll) {
        cloudStack.ui.event.call('addNotification', {
          section: notification.section,
          desc: notification.desc,
          interval: 0,
          poll: function(args) { success(successArgs); args.complete(); }
        });
      } else {
        cloudStack.ui.event.call('addNotification', {
          section: notification.section,
          desc: notification.desc,
          interval: notification.interval ? notification.interval : 5000,
          _custom: notification._custom,
          poll: function(args) {
            var complete = args.complete;
            var notificationError = args.error;

            notification.poll({
              _custom: args._custom,
              complete: function(args) {
                success($.extend(successArgs, args));
                complete(args);
              },
              error: function(args) {
                error($.extend(errorArgs, args));
                notificationError(args);
              }
            });
          }
        });
      }

      return true;
    }
  };

  // Setup notification listener -- accepts same args as
  $(window).bind('cloudStack.addNotification', function(event, data) {
    $('.notifications').notifications('add', data);
  });

  $(document).click(function(event) {
    var $target = $(event.target);
    var $attachTo, $popup;

    // Notifications header area
    if ($target.closest('.notifications').size()) {
      $attachTo = $target.closest('.notifications');
      $popup = $attachTo.data('notifications-popup');
      notifications.popup.show($popup, $attachTo);

      return false;
    }

    // Notification item
    if ($target.is('.notification-box li span')) {
      var $li = $target.closest('.notification-box li');

      $('#navigation ul li').filter(function() {
        return $(this).hasClass($li.data('notification-section'));
      }).click();
      $('div.overlay').click();

      return false;
    }

    // Popup
    if ($target.closest('div.notification-box').size()) {
      $popup = $target.closest('div.notification-box');

      // Clear list
      if ($target.closest('.button.clear-list').size()) {
        notifications.clear($popup);
      }

      // Remove instance item
      else if ($target.hasClass('remove')) {
        notifications.removeItem($popup, $target.closest('li'));
      }

      // Close button
      else if ($target.closest('.button.close')) {
        $('div.overlay').click();
      }

      return false;
    }

    return true;
  });

  $(window).resize(function(event) {
    var $popup = $('div.notification-box:visible');

    if ($popup.size())
      notifications.popup.reposition($popup, $popup.data('notifications-attach-to'));
  });
})(window.jQuery, window.cloudStack, window._l);