import $ from 'jquery';
import { GetYoDigits } from './foundation.core.utils';
import { MediaQuery } from './foundation.util.mediaQuery';

var FOUNDATION_VERSION = '6.8.1';

// Global Foundation object
// This is attached to the window, or used as a module for AMD/Browserify
var Foundation = {
  version: FOUNDATION_VERSION,

  /**
   * Stores initialized plugins.
   */
  _plugins: {},

  /**
   * Stores generated unique ids for plugin instances
   */
  _uuids: [],

  /**
   * Defines a Foundation plugin, adding it to the `Foundation` namespace and the list of plugins to initialize when reflowing.
   * @param {Object} plugin - The constructor of the plugin.
   */
  plugin: function(plugin, name) {
    // Object key to use when adding to global Foundation object
    // Examples: Foundation.Reveal, Foundation.OffCanvas
    var className = (name || functionName(plugin));
    // Object key to use when storing the plugin, also used to create the identifying data attribute for the plugin
    // Examples: data-reveal, data-off-canvas
    var attrName  = hyphenate(className);

    // Add to the Foundation object and the plugins list (for reflowing)
    this._plugins[attrName] = this[className] = plugin;
  },
  /**
   * @function
   * Populates the _uuids array with pointers to each individual plugin instance.
   * Adds the `zfPlugin` data-attribute to programmatically created plugins to allow use of $(selector).foundation(method) calls.
   * Also fires the initialization event for each plugin, consolidating repetitive code.
   * @param {Object} plugin - an instance of a plugin, usually `this` in context.
   * @param {String} name - the name of the plugin, passed as a camelCased string.
   * @fires Plugin#init
   */
  registerPlugin: function(plugin, name){
    var pluginName = name ? hyphenate(name) : functionName(plugin.constructor).toLowerCase();
    plugin.uuid = GetYoDigits(6, pluginName);

    if(!plugin.$element.attr(`data-${pluginName}`)){ plugin.$element.attr(`data-${pluginName}`, plugin.uuid); }
    if(!plugin.$element.data('zfPlugin')){ plugin.$element.data('zfPlugin', plugin); }
          /**
           * Fires when the plugin has initialized.
           * @event Plugin#init
           */
    plugin.$element.trigger(`init.zf.${pluginName}`);

    this._uuids.push(plugin.uuid);

    return;
  },
  /**
   * @function
   * Removes the plugins uuid from the _uuids array.
   * Removes the zfPlugin data attribute, as well as the data-plugin-name attribute.
   * Also fires the destroyed event for the plugin, consolidating repetitive code.
   * @param {Object} plugin - an instance of a plugin, usually `this` in context.
   * @fires Plugin#destroyed
   */
  unregisterPlugin: function(plugin){
    var pluginName = hyphenate(functionName(plugin.$element.data('zfPlugin').constructor));

    this._uuids.splice(this._uuids.indexOf(plugin.uuid), 1);
    plugin.$element.removeAttr(`data-${pluginName}`).removeData('zfPlugin')
          /**
           * Fires when the plugin has been destroyed.
           * @event Plugin#destroyed
           */
          .trigger(`destroyed.zf.${pluginName}`);
    for(var prop in plugin){
      if(typeof plugin[prop] === 'function'){
        plugin[prop] = null; //clean up script to prep for garbage collection.
      }
    }
    return;
  },

  /**
   * @function
   * Causes one or more active plugins to re-initialize, resetting event listeners, recalculating positions, etc.
   * @param {String} plugins - optional string of an individual plugin key, attained by calling `$(element).data('pluginName')`, or string of a plugin class i.e. `'dropdown'`
   * @default If no argument is passed, reflow all currently active plugins.
   */
   reInit: function(plugins){
     var isJQ = plugins instanceof $;
     try{
       if(isJQ){
         plugins.each(function(){
           $(this).data('zfPlugin')._init();
         });
       }else{
         var type = typeof plugins,
         _this = this,
         fns = {
           'object': function(plgs){
             plgs.forEach(function(p){
               p = hyphenate(p);
               $('[data-'+ p +']').foundation('_init');
             });
           },
           'string': function(){
             plugins = hyphenate(plugins);
             $('[data-'+ plugins +']').foundation('_init');
           },
           'undefined': function(){
             this.object(Object.keys(_this._plugins));
           }
         };
         fns[type](plugins);
       }
     }catch(err){
       console.error(err);
     }finally{
       return plugins;
     }
   },

  /**
   * Initialize plugins on any elements within `elem` (and `elem` itself) that aren't already initialized.
   * @param {Object} elem - jQuery object containing the element to check inside. Also checks the element itself, unless it's the `document` object.
   * @param {String|Array} plugins - A list of plugins to initialize. Leave this out to initialize everything.
   */
  reflow: function(elem, plugins) {

    // If plugins is undefined, just grab everything
    if (typeof plugins === 'undefined') {
      plugins = Object.keys(this._plugins);
    }
    // If plugins is a string, convert it to an array with one item
    else if (typeof plugins === 'string') {
      plugins = [plugins];
    }

    var _this = this;

    // Iterate through each plugin
    $.each(plugins, function(i, name) {
      // Get the current plugin
      var plugin = _this._plugins[name];

      // Localize the search to all elements inside elem, as well as elem itself, unless elem === document
      var $elem = $(elem).find('[data-'+name+']').addBack('[data-'+name+']').filter(function () {
        return typeof $(this).data("zfPlugin") === 'undefined';
      });

      // For each plugin found, initialize it
      $elem.each(function() {
        var $el = $(this),
            opts = { reflow: true };

        if($el.attr('data-options')){
          $el.attr('data-options').split(';').forEach(function(option){
            var opt = option.split(':').map(function(el){ return el.trim(); });
            if(opt[0]) opts[opt[0]] = parseValue(opt[1]);
          });
        }
        try{
          $el.data('zfPlugin', new plugin($(this), opts));
        }catch(er){
          console.error(er);
        }finally{
          return;
        }
      });
    });
  },
  getFnName: functionName,

  addToJquery: function() {
    // TODO: consider not making this a jQuery function
    // TODO: need way to reflow vs. re-initialize
    /**
     * The Foundation jQuery method.
     * @param {String|Array} method - An action to perform on the current jQuery object.
     */
    var foundation = function(method) {
      var type = typeof method,
          $noJS = $('.no-js');

      if($noJS.length){
        $noJS.removeClass('no-js');
      }

      if(type === 'undefined'){//needs to initialize the Foundation object, or an individual plugin.
        MediaQuery._init();
        Foundation.reflow(this);
      }else if(type === 'string'){//an individual method to invoke on a plugin or group of plugins
        var args = Array.prototype.slice.call(arguments, 1);//collect all the arguments, if necessary
        var plugClass = this.data('zfPlugin');//determine the class of plugin

        if(typeof plugClass !== 'undefined' && typeof plugClass[method] !== 'undefined'){//make sure both the class and method exist
          if(this.length === 1){//if there's only one, call it directly.
              plugClass[method].apply(plugClass, args);
          }else{
            this.each(function(i, el){//otherwise loop through the jQuery collection and invoke the method on each
              plugClass[method].apply($(el).data('zfPlugin'), args);
            });
          }
        }else{//error for no class or no method
          throw new ReferenceError("We're sorry, '" + method + "' is not an available method for " + (plugClass ? functionName(plugClass) : 'this element') + '.');
        }
      }else{//error for invalid argument type
        throw new TypeError(`We're sorry, ${type} is not a valid parameter. You must use a string representing the method you wish to invoke.`);
      }
      return this;
    };
    $.fn.foundation = foundation;
    return $;
  }
};

Foundation.util = {
  /**
   * Function for applying a debounce effect to a function call.
   * @function
   * @param {Function} func - Function to be called at end of timeout.
   * @param {Number} delay - Time in ms to delay the call of `func`.
   * @returns function
   */
  throttle: function (func, delay) {
    var timer = null;

    return function () {
      var context = this, args = arguments;

      if (timer === null) {
        timer = setTimeout(function () {
          func.apply(context, args);
          timer = null;
        }, delay);
      }
    };
  }
};

window.Foundation = Foundation;

// Polyfill for requestAnimationFrame
(function() {
  if (!Date.now || !window.Date.now)
    window.Date.now = Date.now = function() { return new Date().getTime(); };

  var vendors = ['webkit', 'moz'];
  for (var i = 0; i < vendors.length && !window.requestAnimationFrame; ++i) {
      var vp = vendors[i];
      window.requestAnimationFrame = window[vp+'RequestAnimationFrame'];
      window.cancelAnimationFrame = (window[vp+'CancelAnimationFrame']
                                 || window[vp+'CancelRequestAnimationFrame']);
  }
  if (/iP(ad|hone|od).*OS 6/.test(window.navigator.userAgent)
    || !window.requestAnimationFrame || !window.cancelAnimationFrame) {
    var lastTime = 0;
    window.requestAnimationFrame = function(callback) {
        var now = Date.now();
        var nextTime = Math.max(lastTime + 16, now);
        return setTimeout(function() { callback(lastTime = nextTime); },
                          nextTime - now);
    };
    window.cancelAnimationFrame = clearTimeout;
  }
  /**
   * Polyfill for performance.now, required by rAF
   */
  if(!window.performance || !window.performance.now){
    window.performance = {
      start: Date.now(),
      now: function(){ return Date.now() - this.start; }
    };
  }
})();
if (!Function.prototype.bind) {
  /* eslint-disable no-extend-native */
  Function.prototype.bind = function(oThis) {
    if (typeof this !== 'function') {
      // closest thing possible to the ECMAScript 5
      // internal IsCallable function
      throw new TypeError('Function.prototype.bind - what is trying to be bound is not callable');
    }

    var aArgs   = Array.prototype.slice.call(arguments, 1),
        fToBind = this,
        fNOP    = function() {},
        fBound  = function() {
          return fToBind.apply(this instanceof fNOP
                 ? this
                 : oThis,
                 aArgs.concat(Array.prototype.slice.call(arguments)));
        };

    if (this.prototype) {
      // native functions don't have a prototype
      fNOP.prototype = this.prototype;
    }
    fBound.prototype = new fNOP();

    return fBound;
  };
}
// Polyfill to get the name of a function in IE9
function functionName(fn) {
  if (typeof Function.prototype.name === 'undefined') {
    var funcNameRegex = /function\s([^(]{1,})\(/;
    var results = (funcNameRegex).exec((fn).toString());
    return (results && results.length > 1) ? results[1].trim() : "";
  }
  else if (typeof fn.prototype === 'undefined') {
    return fn.constructor.name;
  }
  else {
    return fn.prototype.constructor.name;
  }
}
function parseValue(str){
  if ('true' === str) return true;
  else if ('false' === str) return false;
  else if (!isNaN(str * 1)) return parseFloat(str);
  return str;
}
// Convert PascalCase to kebab-case
// Thank you: http://stackoverflow.com/a/8955580
function hyphenate(str) {
  return str.replace(/([a-z])([A-Z])/g, '$1-$2').toLowerCase();
}

export {Foundation};