/* Button features:
 * - observe selection changes to enable/disable the button using enableFn()
 * - pop up confirmation dialog using confirmMsg()
 *
 *   does this for the button and every menu item
 */
Ext.define('PVE.button.Split', {
    extend: 'Ext.button.Split',
    alias: 'widget.pveSplitButton',

    // the selection model to observe
    selModel: undefined,

    // if 'false' handler will not be called (button disabled)
    enableFn: function(record) { },

    // function(record) or text
    confirmMsg: false,

    // take special care in confirm box (select no as default).
    dangerous: false,

    handlerWrapper: function(button, event) {
	var me = this;
	var rec, msg;
	if (me.selModel) {
	    rec = me.selModel.getSelection()[0];
	    if (!rec || (me.enableFn(rec) === false)) {
		return;
	    }
	}

	if (me.confirmMsg) {
	    msg = me.confirmMsg;
	    // confirMsg can be boolean or function
	    /*jslint confusion: true*/
	    if (Ext.isFunction(me.confirmMsg)) {
		msg = me.confirmMsg(rec);
	    }
	    /*jslint confusion: false*/
	    Ext.MessageBox.defaultButton = me.dangerous ? 2 : 1;
	    Ext.Msg.show({
		title: gettext('Confirm'),
		icon: me.dangerous ? Ext.Msg.WARNING : Ext.Msg.QUESTION,
		msg: msg,
		buttons: Ext.Msg.YESNO,
		callback: function(btn) {
		    if (btn !== 'yes') {
			return;
		    }
		    me.realHandler(button, event, rec);
		}
	    });
	} else {
	    me.realHandler(button, event, rec);
	}
    },

    initComponent: function() {
	/*jslint confusion: true */

        var me = this;

	if (me.handler) {
	    me.realHandler = me.handler;
	    me.handler = me.handlerWrapper;
	}

	if (me.menu && me.menu.items) {
	    me.menu.items.forEach(function(item) {
		if (item.handler) {
		    item.realHandler = item.handler;
		    item.handler = me.handlerWrapper;
		}

		if (item.selModel) {
		    me.mon(item.selModel, "selectionchange", function() {
			var rec = item.selModel.getSelection()[0];
			if (!rec || (item.enableFn(rec) === false )) {
			    item.setDisabled(true);
			} else {
			    item.setDisabled(false);
			}
		    });
		}
	    });
	}

	me.callParent();

	if (me.selModel) {

	    me.mon(me.selModel, "selectionchange", function() {
		var rec = me.selModel.getSelection()[0];
		if (!rec || (me.enableFn(rec) === false)) {
		    me.setDisabled(true);
		} else {
		    me.setDisabled(false);
		}
	    });
	}
    }
});