/**
 * humane.js
 * Humanized Messages for Notifications
 * @author Marc Harter (@wavded)
 * @example
 *   humane.log('hello world');
 * See more usage examples at: http://wavded.github.com/humane-js/
 */

;!function (name, context, definition) {
   if (typeof module !== 'undefined') module.exports = definition(name, context)
   else if (typeof define === 'function' && typeof define.amd  === 'object') define(definition)
   else context[name] = definition(name, context)
}('humane', this, function (name, context) {
   var win = window
   var doc = document

   var ENV = {
      on: function (el, type, cb) {
         'addEventListener' in win ? el.addEventListener(type,cb,false) : el.attachEvent('on'+type,cb)
      },
      off: function (el, type, cb) {
         'removeEventListener' in win ? el.removeEventListener(type,cb,false) : el.detachEvent('on'+type,cb)
      },
      bind: function (fn, ctx) {
         return function () { fn.apply(ctx,arguments) }
      },
      isArray: Array.isArray || function (obj) { return Object.prototype.toString.call(obj) === '[object Array]' },
      config: function (preferred, fallback) {
         return preferred != null ? preferred : fallback
      },
      transSupport: false,
      useFilter: /msie [678]/i.test(navigator.userAgent), // sniff, sniff
      _checkTransition: function () {
         var el = doc.createElement('div')
         var vendors = { webkit: 'webkit', Moz: '', O: 'o', ms: 'MS' }

         for (var vendor in vendors)
            if (vendor + 'Transition' in el.style) {
               this.vendorPrefix = vendors[vendor]
               this.transSupport = true
            }
      }
   }
   ENV._checkTransition()

   var Humane = function (o) {
      o || (o = {})
      this.queue = []
      this.baseCls = o.baseCls || 'humane'
      this.addnCls = o.addnCls || ''
      this.timeout = 'timeout' in o ? o.timeout : 2500
      this.waitForMove = o.waitForMove || false
      this.clickToClose = o.clickToClose || false
      this.forceNew = o.forceNew || false
      this.container = o.container || doc.body

      try { this._setupEl() } // attempt to setup elements
      catch (e) {
        ENV.on(win,'load',ENV.bind(this._setupEl, this)) // dom wasn't ready, wait till ready
      }
   }

   Humane.prototype = {
      constructor: Humane,
      _setupEl: function () {
         var el = doc.createElement('div')
         el.style.display = 'none'
         this.container.appendChild(el)
         this.el = el
         this.removeEvent = ENV.bind(this.remove,this)
         this.transEvent = ENV.bind(this._afterAnimation,this)
         this._run()
      },
      _afterTimeout: function () {
         if (!ENV.config(this.currentMsg.waitForMove,this.waitForMove)) this.remove()

         else if (!this.removeEventsSet) {
            ENV.on(doc.body,'mousemove',this.removeEvent)
            ENV.on(doc.body,'click',this.removeEvent)
            ENV.on(doc.body,'keypress',this.removeEvent)
            ENV.on(doc.body,'touchstart',this.removeEvent)
            this.removeEventsSet = true
         }
      },
      _run: function () {
         if (this._animating || !this.queue.length || !this.el) return

         this._animating = true
         if (this.currentTimer) {
            clearTimeout(this.currentTimer)
            this.currentTimer = null
         }

         var msg = this.queue.shift()
         var clickToClose = ENV.config(msg.clickToClose,this.clickToClose)

         if (clickToClose) {
            ENV.on(this.el,'click',this.removeEvent)
            ENV.on(this.el,'touchstart',this.removeEvent)
         }

         var timeout = ENV.config(msg.timeout,this.timeout)

         if (timeout > 0)
            this.currentTimer = setTimeout(ENV.bind(this._afterTimeout,this), timeout)

         if (ENV.isArray(msg.html)) msg.html = '<ul><li>'+msg.html.join('<li>')+'</ul>'

         this.el.innerHTML = msg.html
         this.currentMsg = msg
         this.el.className = this.baseCls
         if (ENV.transSupport) {
            this.el.style.display = 'block'
            setTimeout(ENV.bind(this._showMsg,this),50)
         } else {
            this._showMsg()
         }

      },
      _setOpacity: function (opacity) {
         if (ENV.useFilter)
            this.el.filters.item('DXImageTransform.Microsoft.Alpha').Opacity = opacity*100
         else
            this.el.style.opacity = String(opacity)
      },
      _showMsg: function () {
         var addnCls = ENV.config(this.currentMsg.addnCls,this.addnCls)
         if (ENV.transSupport) {
            this.el.className = this.baseCls+' '+addnCls+' '+this.baseCls+'-animate'
         }
         else {
            var opacity = 0
            this.el.className = this.baseCls+' '+addnCls+' '+this.baseCls+'-js-animate'
            this._setOpacity(0) // reset value so hover states work
            this.el.style.display = 'block'

            var self = this
            var interval = setInterval(function(){
               if (opacity < 1) {
                  opacity += 0.1
                  if (opacity > 1) opacity = 1
                  self._setOpacity(opacity)
               }
               else clearInterval(interval)
            }, 30)
         }
      },
      _hideMsg: function () {
         var addnCls = ENV.config(this.currentMsg.addnCls,this.addnCls)
         if (ENV.transSupport) {
            this.el.className = this.baseCls+' '+addnCls
            ENV.on(this.el,ENV.vendorPrefix ? ENV.vendorPrefix+'TransitionEnd' : 'transitionend',this.transEvent)
         }
         else {
            var opacity = 1
            var self = this
            var interval = setInterval(function(){
               if(opacity > 0) {
                  opacity -= 0.1
                  if (opacity < 0) opacity = 0
                  self._setOpacity(opacity);
               }
               else {
                  self.el.className = self.baseCls+' '+addnCls
                  clearInterval(interval)
                  self._afterAnimation()
               }
            }, 30)
         }
      },
      _afterAnimation: function () {
         if (ENV.transSupport) ENV.off(this.el,ENV.vendorPrefix ? ENV.vendorPrefix+'TransitionEnd' : 'transitionend',this.transEvent)

         if (this.currentMsg.cb) this.currentMsg.cb()
         this.el.style.display = 'none'

         this._animating = false
         this._run()
      },
      remove: function (e) {
         var cb = typeof e == 'function' ? e : null

         ENV.off(doc.body,'mousemove',this.removeEvent)
         ENV.off(doc.body,'click',this.removeEvent)
         ENV.off(doc.body,'keypress',this.removeEvent)
         ENV.off(doc.body,'touchstart',this.removeEvent)
         ENV.off(this.el,'click',this.removeEvent)
         ENV.off(this.el,'touchstart',this.removeEvent)
         this.removeEventsSet = false

         if (cb) this.currentMsg.cb = cb
         if (this._animating) this._hideMsg()
         else if (cb) cb()
      },
      log: function (html, o, cb, defaults) {
         var msg = {}
         if (defaults)
           for (var opt in defaults)
               msg[opt] = defaults[opt]

         if (typeof o == 'function') cb = o
         else if (o)
            for (var opt in o) msg[opt] = o[opt]

         msg.html = html
         if (cb) msg.cb = cb
         this.queue.push(msg)
         this._run()
         return this
      },
      spawn: function (defaults) {
         var self = this
         return function (html, o, cb) {
            self.log.call(self,html,o,cb,defaults)
            return self
         }
      },
      create: function (o) { return new Humane(o) }
   }
   return new Humane()
})
