var mockData = [
    {
        id: "无锡",
        text: "无锡",
        isParent: true,
        layer: 0
    }, {
        id: "锡山区",
        text: "锡山区",
        pId: "无锡",
        isParent: true,
        layer: 1
    }, {
        id: "安镇街道",
        text: "安镇街道",
        pId: "锡山区",
        layer: 2
    }, {
        id: "滨湖区",
        text: "滨湖区",
        pId: "无锡",
        layer: 1
    }, {
        id: "南京",
        text: "南京",
        isParent: true,
        layer: 0
    }, {
        id: "建邺区",
        text: "建邺区",
        pId: "南京",
        layer: 1
    }
];


var Tree = BI.inherit(BI.Widget, {

    render: function () {
        return {
            type: "bi.custom_tree",
            expander: {
                type: "bi.expander",
                isDefaultInit: false,
                el: {},
                popup: {
                    type: "bi.custom_tree",
                },
            },
            el: {
                type: "bi.loader",
                next: false,
                el: {
                    type: "bi.button_tree",
                    chooseType: -1,
                    layouts: [
                        {
                            type: "bi.vertical",
                        },
                    ],
                },
            },
            itemsCreator: BI.bind(this._itemsCreator, this),
            listeners: [
                {
                    eventName: BI.Controller.EVENT_CHANGE,
                    action: function (type, value) {
                        if (type === BI.Events.CLICK) {
                            this.setValue(value);
                        }
                    },
                },
            ],
        }
    },

    _formatItems: function (items) {
        return BI.map(items, function (index, item) {
            return BI.extend({
                type: item.isParent ? "bi.example.sync_custom_tree.node" : "bi.example.sync_custom_tree.item"
            }, item)
        })
    },

    _itemsCreator: function (op, callback) {
        var items = [];
        if (!op.node) { // 初次回调的时候是没有节点信息的
            items = BI.filter(mockData, function (index, item) {
                return BI.isNull(item.pId);
            })
        } else {
            var id = op.node.id;
            items = BI.filter(mockData, function (index, item) {
                return item.pId === id;
            })
        }
        callback(this._formatItems(items))
    },
});

BI.shortcut("bi.example.sync_custom_tree", Tree);

BI.createWidget({
    type: "bi.example.sync_custom_tree",
    element: "#wrapper"
})