/**
 * 自适应布局
 *
 * 1、resize
 * 2、吸附
 * 3、当前组件在最上方
 * 4、可以撤销
 * 5、上下之间插入组件
 *
 * Created by GUY on 2016/2/23.
 * @class BI.AdaptiveArrangement
 * @extends BI.Widget
 */
BI.AdaptiveArrangement = BI.inherit(BI.Widget, {

    _defaultConfig: function () {
        return BI.extend(BI.AdaptiveArrangement.superclass._defaultConfig.apply(this, arguments), {
            baseCls: "bi-adaptive-arrangement",
            resizable: true,
            layoutType: BI.Arrangement.LAYOUT_TYPE.FREE,
            items: []
        });
    },

    _init: function () {
        BI.AdaptiveArrangement.superclass._init.apply(this, arguments);
        var self = this, o = this.options;
        this.arrangement = BI.createWidget({
            type: "bi.arrangement",
            element: this,
            layoutType: o.layoutType,
            items: o.items
        });
        this.arrangement.on(BI.Arrangement.EVENT_SCROLL, function () {
            self.fireEvent(BI.AdaptiveArrangement.EVENT_SCROLL, arguments);
        });
        this.zIndex = 0;
        BI.each(o.items, function (i, item) {
            self._initResizable(item.el);
        });

        $(document).mousedown(function (e) {
            BI.each(self.getAllRegions(), function (i, region) {
                if (region.el.element.find(e.target).length === 0) {
                    region.el.element.removeClass("selected");
                }
            });
        });
        BI.ResizeDetector.addResizeListener(this, function () {
            self.arrangement.resize();
            self.fireEvent(BI.AdaptiveArrangement.EVENT_RESIZE);
        });
    },

    _isEqual: function () {
        return this.arrangement._isEqual.apply(this.arrangement, arguments);
    },

    _setSelect: function (item) {
        if (!item.element.hasClass("selected")) {
            item.element.css("zIndex", ++this.zIndex);
            BI.each(this.getAllRegions(), function (i, region) {
                region.el.element.removeClass("selected");
            });
            item.element.addClass("selected");
        }
    },

    _initResizable: function (item) {
        var self = this, o = this.options;
        item.element.css("zIndex", ++this.zIndex);
        item.element.mousedown(function () {
            self._setSelect(item)
        });
    },

    _getScrollOffset: function () {
        return this.arrangement._getScrollOffset();
    },

    getClientWidth: function () {
        return this.arrangement.getClientWidth();
    },

    getClientHeight: function () {
        return this.arrangement.getClientHeight();
    },

    addRegion: function (region, position) {
        this._initResizable(region.el);
        this._setSelect(region.el);
        var self = this, flag;
        var old = this.arrangement.getAllRegions();
        if (flag = this.arrangement.addRegion(region, position)) {
            this._old = old;
        }
        return flag;
    },

    deleteRegion: function (name) {
        var flag;
        var old = this.getAllRegions();
        if (flag = this.arrangement.deleteRegion(name)) {
            this._old = old;
        } else {
            this._old = this.getAllRegions();
            this.relayout();
        }
        return flag;
    },

    setRegionSize: function (name, size) {
        var flag;
        var old = this.getAllRegions();
        if (flag = this.arrangement.setRegionSize(name, size)) {
            this._old = old;
        }
        return flag;
    },

    setPosition: function (position, size) {
        var self = this;
        return this.arrangement.setPosition(position, size);
    },

    setRegionPosition: function (name, position) {
        var region = this.getRegionByName(name);
        return this.arrangement.setRegionPosition(name, position);
    },

    setDropPosition: function (position, size) {
        return this.arrangement.setDropPosition(position, size);
    },

    scrollInterval: function (e, isBorderScroll, isOverflowScroll, cb) {
        // var self = this;
        // var map = {
        //     top: [-1, 0],
        //     bottom: [1, 0],
        //     left: [0, -1],
        //     right: [0, 1]
        // };
        // var clientWidth = this.arrangement.getClientWidth();
        // var clientHeight = this.arrangement.getClientHeight();
        //
        // function scrollTo(direction, callback) {
        //     if (direction === "") {
        //         self.lastActiveRegion = "";
        //         if (self._scrollInterval) {
        //             clearInterval(self._scrollInterval);
        //             self._scrollInterval = null;
        //         }
        //         return;
        //     }
        //     if (self.lastActiveRegion !== direction) {
        //         self.lastActiveRegion = direction;
        //         if (self._scrollInterval) {
        //             clearInterval(self._scrollInterval);
        //             self._scrollInterval = null;
        //         }
        //         var count = 0;
        //         self._scrollInterval = setInterval(function () {
        //             count++;
        //             if (count <= 3) {
        //                 return;
        //             }
        //             var offset = self._getScrollOffset();
        //             var t = offset.top + map[direction][0] * 40;
        //             var l = offset.left + map[direction][1] * 40;
        //             if (t < 0 || l < 0) {
        //                 return;
        //             }
        //             callback({
        //                 offsetX: map[direction][1] * 40,
        //                 offsetY: map[direction][0] * 40
        //             });
        //             self.scrollTo({
        //                 top: t,
        //                 left: l
        //             });
        //         }, 300);
        //     }
        // }

        cb({
            offsetX: 0,
            offsetY: 0
        });
        // var offset = this.element.offset();
        // var p = {
        //     left: e.pageX - offset.left,
        //     top: e.pageY - offset.top
        // };
        // //向上滚
        // if (isBorderScroll && p.top >= 0 && p.top <= 30) {
        //     scrollTo("top", cb)
        // }
        // //向下滚
        // else if (isBorderScroll && p.top >= clientHeight - 30 && p.top <= clientHeight) {
        //     scrollTo("bottom", cb)
        // }
        // //向左滚
        // else if (isBorderScroll && p.left >= 0 && p.left <= 30) {
        //     scrollTo("left", cb)
        // }
        // //向右滚
        // else if (isBorderScroll && p.left >= clientWidth - 30 && p.left <= clientWidth) {
        //     scrollTo("right", cb)
        // } else {
        //     if (isOverflowScroll === true) {
        //         if (p.top < 0) {
        //             scrollTo("top", cb);
        //         }
        //         else if (p.top > clientHeight) {
        //             scrollTo("bottom", cb);
        //         }
        //         else if (p.left < 0) {
        //             scrollTo("left", cb);
        //         }
        //         else if (p.left > clientWidth) {
        //             scrollTo("right", cb);
        //         } else {
        //             scrollTo("", cb);
        //         }
        //     } else {
        //         scrollTo("", cb);
        //     }
        // }
    },

    scrollEnd: function () {
        this.lastActiveRegion = "";
        if (this._scrollInterval) {
            clearInterval(this._scrollInterval);
            this._scrollInterval = null;
        }
    },

    scrollTo: function (scroll) {
        this.arrangement.scrollTo(scroll);
    },

    zoom: function (ratio) {
        this.arrangement.zoom(ratio);
    },

    resize: function () {
        this.arrangement.resize();
    },

    relayout: function () {
        return this.arrangement.relayout();
    },

    setLayoutType: function (type) {
        var self = this;
        this.arrangement.setLayoutType(type);
    },

    getLayoutType: function () {
        return this.arrangement.getLayoutType();
    },

    getLayoutRatio: function () {
        return this.arrangement.getLayoutRatio();
    },

    getHelper: function () {
        return this.arrangement.getHelper();
    },

    getRegionByName: function (name) {
        return this.arrangement.getRegionByName(name);
    },

    getAllRegions: function () {
        return this.arrangement.getAllRegions();
    },

    revoke: function () {
        if (this._old) {
            this.populate(BI.toArray(this._old));
        }
    },

    populate: function (items) {
        var self = this;
        BI.each(items, function (i, item) {
            self._initResizable(item.el);
        });
        this.arrangement.populate(items);
    }
});
BI.AdaptiveArrangement.EVENT_ELEMENT_START_RESIZE = "AdaptiveArrangement.EVENT_ELEMENT_START_RESIZE";
BI.AdaptiveArrangement.EVENT_ELEMENT_RESIZE = "AdaptiveArrangement.EVENT_ELEMENT_RESIZE";
BI.AdaptiveArrangement.EVENT_ELEMENT_STOP_RESIZE = "AdaptiveArrangement.EVENT_ELEMENT_STOP_RESIZE";
BI.AdaptiveArrangement.EVENT_RESIZE = "AdaptiveArrangement.EVENT_RESIZE";
BI.AdaptiveArrangement.EVENT_SCROLL = "AdaptiveArrangement.EVENT_SCROLL";
BI.shortcut('bi.adaptive_arrangement', BI.AdaptiveArrangement);