/*

YUI 3.10.3 (build 2fb5187)

Copyright 2013 Yahoo! Inc. All rights reserved.

Licensed under the BSD License.

http://yuilibrary.com/license/

*/

YUI.add('pluginhost-config', function (Y, NAME) {

    /**

     * Adds pluginhost constructor configuration and static configuration support

     * @submodule pluginhost-config

     */

    var PluginHost = Y.Plugin.Host,

        L = Y.Lang;

    /**

     * A protected initialization method, used by the host class to initialize

     * plugin configurations passed the constructor, through the config object.

     * 

     * Host objects should invoke this method at the appropriate time in their

     * construction lifecycle.

     * 

     * @method _initConfigPlugins

     * @param {Object} config The configuration object passed to the constructor

     * @protected

     * @for Plugin.Host

     */

    PluginHost.prototype._initConfigPlugins = function(config) {

        // Class Configuration

        var classes = (this._getClasses) ? this._getClasses() : [this.constructor],

            plug = [],

            unplug = {},

            constructor, i, classPlug, classUnplug, pluginClassName;

        // TODO: Room for optimization. Can we apply statically/unplug in same pass?

        for (i = classes.length - 1; i >= 0; i--) {

            constructor = classes[i];

            classUnplug = constructor._UNPLUG;

            if (classUnplug) {

                // subclasses over-write

                Y.mix(unplug, classUnplug, true);

            }

            classPlug = constructor._PLUG;

            if (classPlug) {

                // subclasses over-write

                Y.mix(plug, classPlug, true);

            }

        }

        for (pluginClassName in plug) {

            if (plug.hasOwnProperty(pluginClassName)) {

                if (!unplug[pluginClassName]) {

                    this.plug(plug[pluginClassName]);

                }

            }

        }

        // User Configuration

        if (config && config.plugins) {

            this.plug(config.plugins);

        }

    };

    /**

     * Registers plugins to be instantiated at the class level (plugins 

     * which should be plugged into every instance of the class by default).

     *

     * @method plug

     * @static

     *

     * @param {Function} hostClass The host class on which to register the plugins

     * @param {Function | Array} plugin Either the plugin class, an array of plugin classes or an array of objects (with fn and cfg properties defined)

     * @param {Object} config (Optional) If plugin is the plugin class, the configuration for the plugin

     * @for Plugin.Host

     */

    PluginHost.plug = function(hostClass, plugin, config) {

        // Cannot plug into Base, since Plugins derive from Base [ will cause infinite recurrsion ]

        var p, i, l, name;

        if (hostClass !== Y.Base) {

            hostClass._PLUG = hostClass._PLUG || {};

            if (!L.isArray(plugin)) {

                if (config) {

                    plugin = {fn:plugin, cfg:config};

                }

                plugin = [plugin];

            }

            for (i = 0, l = plugin.length; i < l;i++) {

                p = plugin[i];

                name = p.NAME || p.fn.NAME;

                hostClass._PLUG[name] = p;

            }

        }

    };

    /**

     * Unregisters any class level plugins which have been registered by the host class, or any

     * other class in the hierarchy.

     *

     * @method unplug

     * @static

     *

     * @param {Function} hostClass The host class from which to unregister the plugins

     * @param {Function | Array} plugin The plugin class, or an array of plugin classes

     * @for Plugin.Host

     */

    PluginHost.unplug = function(hostClass, plugin) {

        var p, i, l, name;

        if (hostClass !== Y.Base) {

            hostClass._UNPLUG = hostClass._UNPLUG || {};

            if (!L.isArray(plugin)) {

                plugin = [plugin];

            }

            for (i = 0, l = plugin.length; i < l; i++) {

                p = plugin[i];

                name = p.NAME;

                if (!hostClass._PLUG[name]) {

                    hostClass._UNPLUG[name] = p;

                } else {

                    delete hostClass._PLUG[name];

                }

            }

        }

    };

}, '3.10.3', {"requires": ["pluginhost-base"]});