'use strict';

import $ from 'jquery';

import { GetYoDigits } from './foundation.util.core';
import { MediaQuery } from './foundation.util.mediaQuery';
import { Triggers } from './foundation.util.triggers';
import { Positionable } from './foundation.positionable';

/**
 * Tooltip module.
 * @module foundation.tooltip
 * @requires foundation.util.box
 * @requires foundation.util.mediaQuery
 * @requires foundation.util.triggers
 */

class Tooltip extends Positionable {
  /**
   * Creates a new instance of a Tooltip.
   * @class
   * @name Tooltip
   * @fires Tooltip#init
   * @param {jQuery} element - jQuery object to attach a tooltip to.
   * @param {Object} options - object to extend the default configuration.
   */
  _setup(element, options) {
    this.$element = element;
    this.options = $.extend({}, Tooltip.defaults, this.$element.data(), options);
    this.className = 'Tooltip'; // ie9 back compat

    this.isActive = false;
    this.isClick = false;

    // Triggers init is idempotent, just need to make sure it is initialized
    Triggers.init($);

    this._init();
  }

  /**
   * Initializes the tooltip by setting the creating the tip element, adding it's text, setting private variables and setting attributes on the anchor.
   * @private
   */
  _init() {
    MediaQuery._init();
    var elemId = this.$element.attr('aria-describedby') || GetYoDigits(6, 'tooltip');

    this.options.tipText = this.options.tipText || this.$element.attr('title');
    this.template = this.options.template ? $(this.options.template) : this._buildTemplate(elemId);

    if (this.options.allowHtml) {
      this.template.appendTo(document.body)
        .html(this.options.tipText)
        .hide();
    } else {
      this.template.appendTo(document.body)
        .text(this.options.tipText)
        .hide();
    }

    this.$element.attr({
      'title': '',
      'aria-describedby': elemId,
      'data-yeti-box': elemId,
      'data-toggle': elemId,
      'data-resize': elemId
    }).addClass(this.options.triggerClass);

    super._init();
    this._events();
  }

  _getDefaultPosition() {
    // handle legacy classnames
    var position = this.$element[0].className.match(/\b(top|left|right|bottom)\b/g);
    return position ? position[0] : 'top';
  }

  _getDefaultAlignment() {
    return 'center';
  }

  _getHOffset() {
    if(this.position === 'left' || this.position === 'right') {
      return this.options.hOffset + this.options.tooltipWidth;
    } else {
      return this.options.hOffset
    }
  }

  _getVOffset() {
    if(this.position === 'top' || this.position === 'bottom') {
      return this.options.vOffset + this.options.tooltipHeight;
    } else {
      return this.options.vOffset
    }
  }

  /**
   * builds the tooltip element, adds attributes, and returns the template.
   * @private
   */
  _buildTemplate(id) {
    var templateClasses = (`${this.options.tooltipClass} ${this.options.positionClass} ${this.options.templateClasses}`).trim();
    var $template =  $('<div></div>').addClass(templateClasses).attr({
      'role': 'tooltip',
      'aria-hidden': true,
      'data-is-active': false,
      'data-is-focus': false,
      'id': id
    });
    return $template;
  }

  /**
   * sets the position class of an element and recursively calls itself until there are no more possible positions to attempt, or the tooltip element is no longer colliding.
   * if the tooltip is larger than the screen width, default to full width - any user selected margin
   * @private
   */
  _setPosition() {
    super._setPosition(this.$element, this.template);
  }

  /**
   * reveals the tooltip, and fires an event to close any other open tooltips on the page
   * @fires Tooltip#closeme
   * @fires Tooltip#show
   * @function
   */
  show() {
    if (this.options.showOn !== 'all' && !MediaQuery.is(this.options.showOn)) {
      // console.error('The screen is too small to display this tooltip');
      return false;
    }

    var _this = this;
    this.template.css('visibility', 'hidden').show();
    this._setPosition();
    this.template.removeClass('top bottom left right').addClass(this.position)
    this.template.removeClass('align-top align-bottom align-left align-right align-center').addClass('align-' + this.alignment);

    /**
     * Fires to close all other open tooltips on the page
     * @event Closeme#tooltip
     */
    this.$element.trigger('closeme.zf.tooltip', this.template.attr('id'));


    this.template.attr({
      'data-is-active': true,
      'aria-hidden': false
    });
    _this.isActive = true;
    // console.log(this.template);
    this.template.stop().hide().css('visibility', '').fadeIn(this.options.fadeInDuration, function() {
      //maybe do stuff?
    });
    /**
     * Fires when the tooltip is shown
     * @event Tooltip#show
     */
    this.$element.trigger('show.zf.tooltip');
  }

  /**
   * Hides the current tooltip, and resets the positioning class if it was changed due to collision
   * @fires Tooltip#hide
   * @function
   */
  hide() {
    // console.log('hiding', this.$element.data('yeti-box'));
    var _this = this;
    this.template.stop().attr({
      'aria-hidden': true,
      'data-is-active': false
    }).fadeOut(this.options.fadeOutDuration, function() {
      _this.isActive = false;
      _this.isClick = false;
    });
    /**
     * fires when the tooltip is hidden
     * @event Tooltip#hide
     */
    this.$element.trigger('hide.zf.tooltip');
  }

  /**
   * adds event listeners for the tooltip and its anchor
   * TODO combine some of the listeners like focus and mouseenter, etc.
   * @private
   */
  _events() {
    var _this = this;
    var $template = this.template;
    var isFocus = false;

    if (!this.options.disableHover) {

      this.$element
      .on('mouseenter.zf.tooltip', function(e) {
        if (!_this.isActive) {
          _this.timeout = setTimeout(function() {
            _this.show();
          }, _this.options.hoverDelay);
        }
      })
      .on('mouseleave.zf.tooltip', function(e) {
        clearTimeout(_this.timeout);
        if (!isFocus || (_this.isClick && !_this.options.clickOpen)) {
          _this.hide();
        }
      });
    }

    if (this.options.clickOpen) {
      this.$element.on('mousedown.zf.tooltip', function(e) {
        e.stopImmediatePropagation();
        if (_this.isClick) {
          //_this.hide();
          // _this.isClick = false;
        } else {
          _this.isClick = true;
          if ((_this.options.disableHover || !_this.$element.attr('tabindex')) && !_this.isActive) {
            _this.show();
          }
        }
      });
    } else {
      this.$element.on('mousedown.zf.tooltip', function(e) {
        e.stopImmediatePropagation();
        _this.isClick = true;
      });
    }

    if (!this.options.disableForTouch) {
      this.$element
      .on('tap.zf.tooltip touchend.zf.tooltip', function(e) {
        _this.isActive ? _this.hide() : _this.show();
      });
    }

    this.$element.on({
      // 'toggle.zf.trigger': this.toggle.bind(this),
      // 'close.zf.trigger': this.hide.bind(this)
      'close.zf.trigger': this.hide.bind(this)
    });

    this.$element
      .on('focus.zf.tooltip', function(e) {
        isFocus = true;
        if (_this.isClick) {
          // If we're not showing open on clicks, we need to pretend a click-launched focus isn't
          // a real focus, otherwise on hover and come back we get bad behavior
          if(!_this.options.clickOpen) { isFocus = false; }
          return false;
        } else {
          _this.show();
        }
      })

      .on('focusout.zf.tooltip', function(e) {
        isFocus = false;
        _this.isClick = false;
        _this.hide();
      })

      .on('resizeme.zf.trigger', function() {
        if (_this.isActive) {
          _this._setPosition();
        }
      });
  }

  /**
   * adds a toggle method, in addition to the static show() & hide() functions
   * @function
   */
  toggle() {
    if (this.isActive) {
      this.hide();
    } else {
      this.show();
    }
  }

  /**
   * Destroys an instance of tooltip, removes template element from the view.
   * @function
   */
  _destroy() {
    this.$element.attr('title', this.template.text())
                 .off('.zf.trigger .zf.tooltip')
                 .removeClass('has-tip top right left')
                 .removeAttr('aria-describedby aria-haspopup data-disable-hover data-resize data-toggle data-tooltip data-yeti-box');

    this.template.remove();
  }
}

Tooltip.defaults = {
  disableForTouch: false,
  /**
   * Time, in ms, before a tooltip should open on hover.
   * @option
   * @type {number}
   * @default 200
   */
  hoverDelay: 200,
  /**
   * Time, in ms, a tooltip should take to fade into view.
   * @option
   * @type {number}
   * @default 150
   */
  fadeInDuration: 150,
  /**
   * Time, in ms, a tooltip should take to fade out of view.
   * @option
   * @type {number}
   * @default 150
   */
  fadeOutDuration: 150,
  /**
   * Disables hover events from opening the tooltip if set to true
   * @option
   * @type {boolean}
   * @default false
   */
  disableHover: false,
  /**
   * Optional addtional classes to apply to the tooltip template on init.
   * @option
   * @type {string}
   * @default ''
   */
  templateClasses: '',
  /**
   * Non-optional class added to tooltip templates. Foundation default is 'tooltip'.
   * @option
   * @type {string}
   * @default 'tooltip'
   */
  tooltipClass: 'tooltip',
  /**
   * Class applied to the tooltip anchor element.
   * @option
   * @type {string}
   * @default 'has-tip'
   */
  triggerClass: 'has-tip',
  /**
   * Minimum breakpoint size at which to open the tooltip.
   * @option
   * @type {string}
   * @default 'small'
   */
  showOn: 'small',
  /**
   * Custom template to be used to generate markup for tooltip.
   * @option
   * @type {string}
   * @default ''
   */
  template: '',
  /**
   * Text displayed in the tooltip template on open.
   * @option
   * @type {string}
   * @default ''
   */
  tipText: '',
  touchCloseText: 'Tap to close.',
  /**
   * Allows the tooltip to remain open if triggered with a click or touch event.
   * @option
   * @type {boolean}
   * @default true
   */
  clickOpen: true,
  /**
   * DEPRECATED Additional positioning classes, set by the JS
   * @option
   * @type {string}
   * @default ''
   */
  positionClass: '',
  /**
   * Position of tooltip. Can be left, right, bottom, top, or auto.
   * @option
   * @type {string}
   * @default 'auto'
   */
  position: 'auto',
  /**
   * Alignment of tooltip relative to anchor. Can be left, right, bottom, top, center, or auto.
   * @option
   * @type {string}
   * @default 'auto'
   */
  alignment: 'auto',
  /**
   * Allow overlap of container/window. If false, tooltip will first try to
   * position as defined by data-position and data-alignment, but reposition if
   * it would cause an overflow.  @option
   * @type {boolean}
   * @default false
   */
  allowOverlap: false,
  /**
   * Allow overlap of only the bottom of the container. This is the most common
   * behavior for dropdowns, allowing the dropdown to extend the bottom of the
   * screen but not otherwise influence or break out of the container.
   * Less common for tooltips.
   * @option
   * @type {boolean}
   * @default false
   */
  allowBottomOverlap: false,
  /**
   * Distance, in pixels, the template should push away from the anchor on the Y axis.
   * @option
   * @type {number}
   * @default 0
   */
  vOffset: 0,
  /**
   * Distance, in pixels, the template should push away from the anchor on the X axis
   * @option
   * @type {number}
   * @default 0
   */
  hOffset: 0,
  /**
   * Distance, in pixels, the template spacing auto-adjust for a vertical tooltip
   * @option
   * @type {number}
   * @default 14
   */
  tooltipHeight: 14,
  /**
   * Distance, in pixels, the template spacing auto-adjust for a horizontal tooltip
   * @option
   * @type {number}
   * @default 12
   */
  tooltipWidth: 12,
    /**
   * Allow HTML in tooltip. Warning: If you are loading user-generated content into tooltips,
   * allowing HTML may open yourself up to XSS attacks.
   * @option
   * @type {boolean}
   * @default false
   */
  allowHtml: false
};

/**
 * TODO utilize resize event trigger
 */

export {Tooltip};