/*
 *    Copyright [2015] [wisemapping]
 *
 *   Licensed under WiseMapping Public License, Version 1.0 (the "License").
 *   It is basically the Apache License, Version 2.0 (the "License") plus the
 *   "powered by wisemapping" text requirement on every single page;
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the license at
 *
 *       http://www.wisemapping.org/license
 *
 *   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.
 */
import { $assert, $defined } from '@wisemapping/core-js';
import * as web2d from '@wisemapping/web2d';

import Icon from './Icon';

const IconGroup = new Class(
  /** @lends IconGroup */ {
    /**
         * @constructs
         * @param topicId
         * @param iconSize
         * @throws will throw an error if topicId is null or undefined
         * @throws will throw an error if iconSize is null or undefined
         */
    initialize(topicId, iconSize) {
      $assert($defined(topicId), 'topicId can not be null');
      $assert($defined(iconSize), 'iconSize can not be null');

      this._icons = [];
      this._group = new web2d.Group({
        width: 0,
        height: iconSize,
        x: 0,
        y: 0,
        coordSizeWidth: 0,
        coordSizeHeight: 100,
      });
      this._removeTip = new IconGroup.RemoveTip(this._group, topicId);
      this.seIconSize(iconSize, iconSize);

      this._registerListeners();
    },

    /** */
    setPosition(x, y) {
      this._group.setPosition(x, y);
    },

    /** */
    getPosition() {
      return this._group.getPosition();
    },

    /** */
    getNativeElement() {
      return this._group;
    },

    /** */
    getSize() {
      return this._group.getSize();
    },

    /** */
    seIconSize(width, height) {
      this._iconSize = { width, height };
      this._resize(this._icons.length);
    },

    /**
         * @param icon the icon to be added to the icon group
         * @param {Boolean} remove
         * @throws will throw an error if icon is not defined
         */
    addIcon(icon, remove) {
      $defined(icon, 'icon is not defined');

      icon.setGroup(this);
      this._icons.push(icon);

      // Adjust group and position ...
      this._resize(this._icons.length);
      this._positionIcon(icon, this._icons.length - 1);

      const imageShape = icon.getImage();
      this._group.append(imageShape);

      // Register event for the group ..
      if (remove) {
        this._removeTip.decorate(this._topicId, icon);
      }
    },

    _findIconFromModel(iconModel) {
      let result = null;

      this._icons.forEach((icon) => {
        const elModel = icon.getModel();

        if (elModel.getId() === iconModel.getId()) {
          result = icon;
        }
      });

      if (result == null) {
        throw new Error(`Icon can no be found:${iconModel.getId()}, Icons:${this._icons}`);
      }

      return result;
    },

    /** */
    removeIconByModel(featureModel) {
      $assert(featureModel, 'featureModel can not be null');

      const icon = this._findIconFromModel(featureModel);
      this._removeIcon(icon);
    },

    _removeIcon(icon) {
      $assert(icon, 'icon can not be null');

      this._removeTip.close(0);
      this._group.removeChild(icon.getImage());

      this._icons.erase(icon);
      this._resize(this._icons.length);
      const me = this;

      // Add all again ...
      this._icons.forEach((elem, i) => {
        me._positionIcon(elem, i);
      });
    },

    /** */
    moveToFront() {
      this._group.moveToFront();
    },

    _registerListeners() {
      this._group.addEvent('click', (event) => {
        // Avoid node creation ...
        event.stopPropagation();
      });

      this._group.addEvent('dblclick', (event) => {
        event.stopPropagation();
      });
    },

    _resize(iconsLength) {
      this._group.setSize(iconsLength * this._iconSize.width, this._iconSize.height);

      const iconSize = Icon.SIZE + IconGroup.ICON_PADDING * 2;
      this._group.setCoordSize(iconsLength * iconSize, iconSize);
    },

    _positionIcon(icon, order) {
      const iconSize = Icon.SIZE + IconGroup.ICON_PADDING * 2;
      icon.getImage().setPosition(
        iconSize * order + IconGroup.ICON_PADDING,
        IconGroup.ICON_PADDING,
      );
    },
  },
);

/**
 * @constant
 * @type {Number}
 * @default
 */
IconGroup.ICON_PADDING = 5;

IconGroup.RemoveTip = new Class(
  /** @lends IconGroup.RemoveTip */ {
    /**
         * @classdesc inner class of IconGroup
         * @constructs
         * @param container
         */
    initialize(container) {
      $assert(container, 'group can not be null');
      this._fadeElem = container;
    },

    /**
         * @param topicId
         * @param icon
         * @throws will throw an error if icon is null or undefined
         */
    show(topicId, icon) {
      $assert(icon, 'icon can not be null');

      // Nothing to do ...
      if (this._activeIcon != icon) {
        // If there is an active icon, close it first ...
        if (this._activeIcon) {
          this.close(0);
        }

        // Now, let move the position the icon...
        const pos = icon.getPosition();

        // Register events ...
        const widget = this._buildWeb2d();
        widget.addEvent('click', () => {
          icon.remove();
        });

        const me = this;

        widget.addEvent('mouseover', () => {
          me.show(topicId, icon);
        });

        widget.addEvent('mouseout', () => {
          me.hide();
        });

        widget.setPosition(pos.x + 80, pos.y - 50);
        this._fadeElem.append(widget);

        // Setup current element ...
        this._activeIcon = icon;
        this._widget = widget;
      } else {
        clearTimeout(this._closeTimeoutId);
      }
    },

    /** */
    hide() {
      this.close(200);
    },

    /**
         * @param delay
         */
    close(delay) {
      // This is not ok, trying to close the same dialog twice ?
      if (this._closeTimeoutId) {
        clearTimeout(this._closeTimeoutId);
      }

      const me = this;
      if (this._activeIcon) {
        const widget = this._widget;
        const close = function () {
          me._activeIcon = null;
          me._fadeElem.removeChild(widget);
          me._widget = null;
          me._closeTimeoutId = null;
        };

        if (!$defined(delay) || delay == 0) {
          close();
        } else {
          this._closeTimeoutId = close.delay(delay);
        }
      }
    },

    _buildWeb2d() {
      const result = new web2d.Group({
        width: 10,
        height: 10,
        x: 0,
        y: 0,
        coordSizeWidth: 10,
        coordSizeHeight: 10,
      });

      const outerRect = new web2d.Rect(0, {
        x: 0,
        y: 0,
        width: 10,
        height: 10,
        stroke: '0',
        fillColor: 'black',
      });
      result.append(outerRect);
      outerRect.setCursor('pointer');

      const innerRect = new web2d.Rect(0, {
        x: 1,
        y: 1,
        width: 8,
        height: 8,
        stroke: '1 solid white',
        fillColor: 'gray',
      });
      result.append(innerRect);

      const line = new web2d.Line({ stroke: '1 solid white' });
      line.setFrom(1, 1);
      line.setTo(9, 9);
      result.append(line);

      const line2 = new web2d.Line({ stroke: '1 solid white' });
      line2.setFrom(1, 9);
      line2.setTo(9, 1);
      result.append(line2);

      // Some events ...
      result.addEvent('mouseover', () => {
        innerRect.setFill('#CC0033');
      });
      result.addEvent('mouseout', () => {
        innerRect.setFill('gray');
      });

      result.setSize(50, 50);
      return result;
    },

    /**
         * @param topicId
         * @param icon
         */
    decorate(topicId, icon) {
      const me = this;

      if (!icon.__remove) {
        icon.addEvent('mouseover', () => {
          me.show(topicId, icon);
        });

        icon.addEvent('mouseout', () => {
          me.hide();
        });
        icon.__remove = true;
      }
    },
  },
);

export default IconGroup;