// ==========================================================================
//
// SlideShow
// Enables slideshow functionality
//
// Example of usage:
// $.fancybox.getInstance().SlideShow.start()
//
// ==========================================================================
(function(document, $) {
  "use strict";

  $.extend(true, $.fancybox.defaults, {
    btnTpl: {
      slideShow:
        '<button data-fancybox-play class="fancybox-button fancybox-button--play" title="{{PLAY_START}}">' +
        '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M6.5 5.4v13.2l11-6.6z"/></svg>' +
        '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M8.33 5.75h2.2v12.5h-2.2V5.75zm5.15 0h2.2v12.5h-2.2V5.75z"/></svg>' +
        "</button>"
    },
    slideShow: {
      autoStart: false,
      speed: 3000,
      progress: true
    }
  });

  var SlideShow = function(instance) {
    this.instance = instance;
    this.init();
  };

  $.extend(SlideShow.prototype, {
    timer: null,
    isActive: false,
    $button: null,

    init: function() {
      var self = this,
        instance = self.instance,
        opts = instance.group[instance.currIndex].opts.slideShow;

      self.$button = instance.$refs.toolbar.find("[data-fancybox-play]").on("click", function() {
        self.toggle();
      });

      if (instance.group.length < 2 || !opts) {
        self.$button.hide();
      } else if (opts.progress) {
        self.$progress = $('<div class="fancybox-progress"></div>').appendTo(instance.$refs.inner);
      }
    },

    set: function(force) {
      var self = this,
        instance = self.instance,
        current = instance.current;

      // Check if reached last element
      if (current && (force === true || current.opts.loop || instance.currIndex < instance.group.length - 1)) {
        if (self.isActive && current.contentType !== "video") {
          if (self.$progress) {
            $.fancybox.animate(self.$progress.show(), {scaleX: 1}, current.opts.slideShow.speed);
          }

          self.timer = setTimeout(function() {
            if (!instance.current.opts.loop && instance.current.index == instance.group.length - 1) {
              instance.jumpTo(0);
            } else {
              instance.next();
            }
          }, current.opts.slideShow.speed);
        }
      } else {
        self.stop();
        instance.idleSecondsCounter = 0;
        instance.showControls();
      }
    },

    clear: function() {
      var self = this;

      clearTimeout(self.timer);

      self.timer = null;

      if (self.$progress) {
        self.$progress.removeAttr("style").hide();
      }
    },

    start: function() {
      var self = this,
        current = self.instance.current;

      if (current) {
        self.$button
          .attr("title", (current.opts.i18n[current.opts.lang] || current.opts.i18n.en).PLAY_STOP)
          .removeClass("fancybox-button--play")
          .addClass("fancybox-button--pause");

        self.isActive = true;

        if (current.isComplete) {
          self.set(true);
        }

        self.instance.trigger("onSlideShowChange", true);
      }
    },

    stop: function() {
      var self = this,
        current = self.instance.current;

      self.clear();

      self.$button
        .attr("title", (current.opts.i18n[current.opts.lang] || current.opts.i18n.en).PLAY_START)
        .removeClass("fancybox-button--pause")
        .addClass("fancybox-button--play");

      self.isActive = false;

      self.instance.trigger("onSlideShowChange", false);

      if (self.$progress) {
        self.$progress.removeAttr("style").hide();
      }
    },

    toggle: function() {
      var self = this;

      if (self.isActive) {
        self.stop();
      } else {
        self.start();
      }
    }
  });

  $(document).on({
    "onInit.fb": function(e, instance) {
      if (instance && !instance.SlideShow) {
        instance.SlideShow = new SlideShow(instance);
      }
    },

    "beforeShow.fb": function(e, instance, current, firstRun) {
      var SlideShow = instance && instance.SlideShow;

      if (firstRun) {
        if (SlideShow && current.opts.slideShow.autoStart) {
          SlideShow.start();
        }
      } else if (SlideShow && SlideShow.isActive) {
        SlideShow.clear();
      }
    },

    "afterShow.fb": function(e, instance, current) {
      var SlideShow = instance && instance.SlideShow;

      if (SlideShow && SlideShow.isActive) {
        SlideShow.set();
      }
    },

    "afterKeydown.fb": function(e, instance, current, keypress, keycode) {
      var SlideShow = instance && instance.SlideShow;

      // "P" or Spacebar
      if (SlideShow && current.opts.slideShow && (keycode === 80 || keycode === 32) && !$(document.activeElement).is("button,a,input")) {
        keypress.preventDefault();

        SlideShow.toggle();
      }
    },

    "beforeClose.fb onDeactivate.fb": function(e, instance) {
      var SlideShow = instance && instance.SlideShow;

      if (SlideShow) {
        SlideShow.stop();
      }
    }
  });

  // Page Visibility API to pause slideshow when window is not active
  $(document).on("visibilitychange", function() {
    var instance = $.fancybox.getInstance(),
      SlideShow = instance && instance.SlideShow;

    if (SlideShow && SlideShow.isActive) {
      if (document.hidden) {
        SlideShow.clear();
      } else {
        SlideShow.set();
      }
    }
  });
})(document, jQuery);
