var H5P = H5P || {};

//
// Initialize H5P content
// Scans for ".h5p-content"
H5P.init = function () {
  if (H5P.$window === undefined) {
    H5P.$window = H5P.jQuery(window);
  }
  if (H5P.$body === undefined) {
    H5P.$body = H5P.jQuery('body');
  }
  
  if (H5P.fullScreenBrowserPrefix === undefined) {
    if (document.cancelFullScreen) {
      H5P.fullScreenBrowserPrefix = '';
    }
    else if (document.webkitCancelFullScreen) {
      H5P.fullScreenBrowserPrefix = 'webkit';
    }
    else if (document.mozCancelFullScreen) {
      H5P.fullScreenBrowserPrefix = 'moz';
    }
    else if (document.msCancelFullScreen) {
      H5P.fullScreenBrowserPrefix = 'ms';
    }
  }
  
  H5P.jQuery(".h5p-content").each(function (idx, el) {
    var $el = H5P.jQuery(el);
    var contentId = $el.data('content-id');
    var obj = new (H5P.classFromName($el.data('class')))(H5P.jQuery.parseJSON(H5PIntegration.getJsonContent(contentId)), contentId);
    obj.attach($el);
    
    if (H5PIntegration.getFullscreen(contentId)) {
      H5P.jQuery('<div class="h5p-content-controls"><a href="#" class="h5p-enable-fullscreen">Enable fullscreen</a><div>').insertBefore($el).children().click(function () {
        H5P.fullScreen($el, obj);
        return false;
      });
    }
  });
};

/**
 * Enable full screen for the given h5p.
 * 
 * @param {jQuery} $el Container
 * @param {object} obj H5P
 * @returns {undefined}
 */
H5P.fullScreen = function ($el, obj) {
  if (H5P.fullScreenBrowserPrefix === undefined) {
    // Create semi fullscreen.
    $el.add(H5P.$body).addClass('h5p-semi-fullscreen');
    var $disable = H5P.jQuery('<a href="#" class="h5p-disable-fullscreen">Disable fullscreen</a>').appendTo($el);
    var keyup, disableSemiFullscreen = function () {
      $el.add(H5P.$body).removeClass('h5p-semi-fullscreen');
      $disable.remove();
      H5P.$body.unbind('keyup', keyup);
            
      if (obj.resize !== undefined) {
        obj.resize(false);
      }
              
      return false;
    };
    keyup = function (event) {
      if (event.keyCode === 27) {
        disableSemiFullscreen();
      }
    };
    $disable.click(disableSemiFullscreen);
    H5P.$body.keyup(keyup);
  }
  else {
    var first, eventName = H5P.fullScreenBrowserPrefix + 'fullscreenchange';
    document.addEventListener(eventName, function () {
      if (first === undefined) {
        first = false;
        return;
      }
      $el.add(H5P.$body).removeClass('h5p-fullscreen');
      document.removeEventListener(eventName, arguments.callee, false);
    });
    
    if (H5P.fullScreenBrowserPrefix === '') {
      $el[0].requestFullScreen();
    }
    else {
      $el[0][H5P.fullScreenBrowserPrefix + 'RequestFullScreen']();
    }
    
    $el.add(H5P.$body).addClass('h5p-fullscreen');
  }
  
  if (obj.resize !== undefined) {
    obj.resize(true);
  }
};

H5P.getContentPath = function(contentId) {
  // TODO: Rewrite or remove... H5P.getContentPath = H5PIntegration.getContentPath would probably work f.i.
  return H5PIntegration.getContentPath(contentId);
};

//
// Used from libraries to construct instances of other libraries' objects by
// name.
//
H5P.classFromName = function(name) {
  var arr = name.split(".");
  return this[arr[arr.length-1]];
};

// Helper object for keeping coordinates in the same format all over.
H5P.Coords = function(x, y, w, h) {
  if ( !(this instanceof H5P.Coords) )
    return new H5P.Coords(x, y, w, h);

  this.x = 0;
  this.y = 0;
  this.w = 1;
  this.h = 1;

  if (typeof(x) === 'object') {
    this.x = x.x;
    this.y = x.y;
    this.w = x.w;
    this.h = x.h;
  } else {
    if (x !== undefined) {
      this.x = x;
    }
    if (y !== undefined) {
      this.y = y;
    }
    if (w !== undefined) {
      this.w = w;
    }
    if (h !== undefined) {
      this.h = h;
    }
  }
  return this;
};

/**
 *@param {string} library
 *  library in the format machineName majorVersion.minorVersion
 * @returns
 *  library as an object with machineName, majorVersion and minorVersion properties
 *  return false if the library parameter is invalid
 */
H5P.libraryFromString = function (library) {
  var regExp = /(.+)\s(\d)+\.(\d)$/g;
  var res = regExp.exec(library);
  if (res !== null) {
    return {
      'machineName': res[1],
      'majorVersion': res[2],
      'minorVersion': res[3]
    };
  }
  else {
    return false;
  }
};
// Play a video. $target is jQuery object to attach video to. (Appended).
// Params are video-params from content. cp is content path. onEnded is
// function to call when finished.
//
// TODO: Try to get rid of content path.
H5P.playVideo = function ($target, params, skipButtonText, cp, onEnded) {
  var $ = H5P.jQuery;

  var width = 635,  // TODO: These should come from some dimension setting.
    height = 500;

  var $container = $('<div class="video-container"></div>').css({
    position: "absolute",
    top: "0px",
    left: "0px",
    "z-index": "500",
    width: width,
    height: height
  });

  var sources = '';
  var willWork = false; // Used for testing if video tag is supported, AND for testing if we can play back our given formats

  var video = document.createElement('video');
  video.autoplay = true;
  video.width = width;
  video.height = height;

  if (video.canPlayType !== undefined) {
    for (var i = 0; i < params.length; i++) {
      var file = params[i];
      // TODO: The files should probably be in their own group.
      if (file.mime.indexOf('video') === 0) {
        if (video.canPlayType(file.mime)) {
          var source = document.createElement('source');
          source.src = cp + file.path;
          source.type = file.mime;
          video.appendChild(source);
          willWork = willWork || true;
        }
      }
    }

    if (willWork) {
      $container.append(video);
      $(video).on('ended', function() {
        onEnded();
      });
    }
  }
  
  var fplayer = undefined;
  if (!willWork) {
    // use flowplayer fallback
    var fp_container = document.createElement("div");
    fp_container.width = "100%";
    fp_container.height = "100%";
    fplayer = flowplayer(fp_container, {
      src: "http://releases.flowplayer.org/swf/flowplayer-3.2.16.swf",
      wmode: "opaque",
      width: width,
      height: height
    }, {
      buffering: true,
      clip: {
        url: window.location.protocol + '//' + window.location.host + cp + params[0].path,
        autoPlay: true,
        autoBuffering: true,
        onFinish: function () {
          onEnded();
        },
        onError: function () {
          onEnded();
        }
      }
    });

    willWork = true;
    $container.append(fp_container);
  }

  if (!willWork) {
    // Video tag is not supported and flash player failed too.
    onEnded();
    return;
  }

  if (skipButtonText) {
    var $skipButton = $('<a class="button skip">' + skipButtonText + '</a>').click(function (ev) {
      if (fplayer !== undefined) {
        // Must stop this first. Errorama if we don't
        fplayer.stop().close().unload();
      }
      $container.hide();
      onEnded();
    });
    $container.append($skipButton);
  }

  // Finally, append to target.
  $target.append($container);
};

/**
 * Recursivly clone the given object.
 * 
 * @param {object} object Object to clone.
 * @param {type} recursive
 * @returns {object} A clone of object.
 */
H5P.cloneObject = function (object, recursive) {
  var clone = {};
  
  for (var i in object) {
    if (object.hasOwnProperty(i)) {
      if (recursive !== undefined && recursive && typeof object[i] === 'object') {
        clone[i] = object[i] instanceof Array ? object[i].slice() : H5P.cloneObject(object[i]);
      }
      else {
        clone[i] = object[i];
      }
    }
   }
   
   return clone;
};

// We have several situations where we want to shuffle an array, extend array
// to do so.
Array.prototype.shuffle = function() {
  var i = this.length, j, tempi, tempj;
  if ( i === 0 ) return false;
  while ( --i ) {
    j       = Math.floor( Math.random() * ( i + 1 ) );
    tempi   = this[i];
    tempj   = this[j];
    this[i] = tempj;
    this[j] = tempi;
  }
  return this;
};

// Add indexOf to browsers that lack them. (IEs)
if(!Array.prototype.indexOf) {
  Array.prototype.indexOf = function(needle) {
    for(var i = 0; i < this.length; i++) {
      if(this[i] === needle) {
        return i;
      }
    }
    return -1;
  };
}

// Simple 'contains' function. Easier to use than keep testing indexOf to -1.
Array.prototype.contains = function (needle) {
  return (this.indexOf(needle) > -1);
};

// Finally, we want to run init when document is ready.
H5P.jQuery(document).ready(function(){
  H5P.init();
});