/**
 * Created by Mai on 2017/4/5.
 */
var cacheTree = {
    createNew: function (owner) {
        var tools = {
            findNode: function (nodes, check) {
                for (var i = 0; i < nodes.length; i++) {
                    if (check(nodes[i])) {
                        return nodes[i];
                    }
                }
                return null;
            },
            reSortNodes: function (nodes, recursive) {
                var temp = [], first;
                var findFirstNode = function (nodes) {
                    return tools.findNode(nodes, function (node) {
                        return node.preSibling === null;
                    });
                };
                var moveNode = function (node, orgArray, newArray, newIndex) {
                    var next;
                    orgArray.splice(orgArray.indexOf(node), 1);
                    newArray.splice(newIndex, 0, node);
                    if (node.getNextSiblingID() !== -1) {
                        next = node.nextSibling;
                        if (next && (orgArray.indexOf(next) >= 0)) {
                            moveNode(next, orgArray, newArray, newIndex + 1);
                        }
                    }
                };
                if (nodes.length === 0) {
                    return nodes;
                }
                if (recursive) {
                    nodes.forEach(function (node) {
                        node.children = tools.reSortNodes(node.children, recursive);
                    });
                }
                while (nodes.length > 0) {
                    first = findFirstNode(nodes);
                    first = first ? first : nodes[0];
                    moveNode(first, nodes, temp, temp.length);
                }
                nodes = null;
                tools.reSiblingNodes(temp);
                return temp;
            },
            reSiblingNodes: function (nodes) {
                var i;
                for (i = 0; i < nodes.length; i++) {
                    nodes[i].preSibling = (i === 0) ? null : nodes[i - 1];
                    nodes[i].nextSibling = (i === nodes.length - 1) ? null : nodes[i + 1];
                }
            },
            // ��nodes�У���iIndex����������ʼȫ���Ƴ�
            removeNodes: function (tree, parent, iIndex, count) {
                var children = parent ? parent.children : tree.roots;
                var pre = (iIndex < 0 || iIndex >= children.length) ? null : children[iIndex].preSibling;
                var next = (pre && iIndex + count - 1 < children.length) ? children[iIndex + count] : null;
                if (pre) {
                    pre.setNextSibling(next);
                } else if (next) {
                    next.preSibling = null;
                }
                if (arguments.length === 4) {
                    children.splice(iIndex, count);
                } else {
                    children.splice(iIndex, children.length - iIndex);
                }
            },
            // 在parent.children/tree.roots中增加nodes, 位置从index开始
            addNodes: function (tree, parent, nodes, iIndex) {
                var children = parent ? parent.children : tree.roots;
                var pre, next, i;
                if (nodes.length === 0) { return; }
                if (arguments.length === 4) {
                    pre = (iIndex <=0 || iIndex > children.length) ? null : children[iIndex-1];
                    if(pre==null){
                        next = iIndex==0?children[0]:null;
                    }else {
                        next = pre.nextSibling;
                    }
                } else if (arguments.length === 3) {
                    pre = children.length === 0 ? null : children[children.length - 1];
                    next = null;
                }
                if (pre) {
                    pre.setNextSibling(nodes[0]);
                } else {
                    nodes[0].preSibling = null;
                }
                nodes[nodes.length - 1].setNextSibling(next);
                for (i = 0; i < nodes.length; i++) {
                    if (arguments.length === 4) {
                        children.splice(iIndex + i, 0, nodes[i]);
                    } else if (arguments.length === 3) {
                        children.push(nodes[i]);
                    }
                    nodes[i].parent = parent;
                }
            }
        };

        var Node = function (tree, id) {
            var ID = id;
            // ���µ����ԣ�����Ԫ��������ֱ���޸�
            this.tree = tree;
            this.children = [];

            this.parent = null;
            this.nextSibling = null;
            this.preSibling = null;

            this.expanded = true;
            this.visible = true;

            this.sourceType = null;
            this.source = null;

            this.getID = function () {
                return ID;
            }
        };
        Node.prototype.getParentID = function () {
            return this.parent ? this.parent.getID() : -1;
        };
        Node.prototype.getNextSiblingID = function () {
            return this.nextSibling ? this.nextSibling.getID() : -1;
        };

        Node.prototype.setParent = function (parent) {
            this.parent = parent;
        };
        Node.prototype.setNextSibling = function (nextSibling) {
            this.nextSibling = nextSibling;
            if (nextSibling) {
                nextSibling.preSibling = this;
            }
        }

        Node.prototype.firstChild = function () {
            return this.children.length === 0 ? null : this.children[0];
        };
        Node.prototype.lastChild = function () {
            return this.children.length === 0 ? null : this.children[this.children.length - 1];
        };
        Node.prototype.depth = function () {
            return this.parent ? this.parent.depth() + 1 : 0;
        };
        Node.prototype.isFirst = function () {
            if (this.parent) {
                return this.parent.children.indexOf(this) === 0 ? true : false;
            } else {
                return this.tree.roots.indexOf(this) === 0 ? true : false;
            }
        };
        Node.prototype.isLast = function () {
            if (this.parent) {
                return this.parent.children.indexOf(this) === this.parent.children.length - 1 ? true : false;
            } else {
                return this.tree.roots.indexOf(this) === this.tree.roots.length - 1 ? true : false;
            }
        };
        Node.prototype.siblingIndex = function () {
            return this.parent ? this.parent.children.indexOf(this) : this.tree.roots.indexOf(this);
        }
        Node.prototype.posterityCount = function () {
            var iCount = 0;
            if (this.children.length !== 0) {
                iCount += this.children.length;
                this.children.forEach(function (child) {
                    iCount += child.posterityCount();
                });
            }
            return iCount;
        };

        Node.prototype.setExpanded = function (expanded) {
            var setNodesVisible = function (nodes, visible) {
                nodes.forEach(function (node) {
                    node.visible = visible;
                    setNodesVisible(node.children, visible && node.expanded);
                })
            };
            this.expanded = expanded;
            setNodesVisible(this.children, expanded);
        };
        Node.prototype.serialNo = function () {
            return this.tree.items.indexOf(this);
        }

        Node.prototype.addChild = function (node) {
            var preSibling = this.children.length === 0 ? null : this.children[this.children.length - 1];
            node.parent = this;
            if (preSibling) {
                preSibling.nextSibling = node;
            }
            node.preSibling = preSibling;
            this.children.push(node);
        };
        Node.prototype.removeChild = function (node) {
            var preSibling = node.preSibling, nextSibling = node.nextSibling;
            if (preSibling) {
                preSibling.nextSibling = nextSibling;
            }
            if (nextSibling) {
                nextSibling.preSibling = preSibling;
            }
            this.children.splice(this.children.re)
        };

        Node.prototype.canUpLevel = function () {
            if (this.sourceType === this.tree.owner.Bills.getSourceType()) {
                return this.parent ? true : false;
            } else {
                return false;
            }
        };
        Node.prototype.canDownLevel = function () {
            return this.sourceType === this.tree.owner.Bills.getSourceType() ? !this.isFirst() : false;
        };
        Node.prototype.canUpMove = function () {
            return !this.isFirst();
        };
        Node.prototype.canDownMove = function () {
            return !this.isLast();
        }

        Node.prototype.upLevel = function () {
            var success = false,
                iIndex = this.parent.children.indexOf(this), orgParent = this.parent, newNextSibling = this.parent.nextSibling;
            if (this.canUpLevel) {
                // NextSiblings become child
                tools.addNodes(this.tree, this, this.parent.children.slice(iIndex + 1));
                // Orginal Parent remove node and nextSiblings
                tools.removeNodes(this.tree, this.parent, iIndex);
                // New Parent add node
                tools.addNodes(this.tree, this.parent.parent, [this], this.parent.siblingIndex() + 1);
                if (!this.expanded) {
                    this.setExpanded(true);
                }
                success = true;
            }
            return success;
        };
        Node.prototype.downLevel = function () {
            var success = false, iIndex = this.parent ? this.parent.children.indexOf(this) : this.tree.roots.indexOf(this);
            var newParent = this.preSibling;
            if (this.canDownLevel()) {
                tools.removeNodes(this.tree, this.parent, this.siblingIndex(), 1);
                tools.addNodes(this.tree, this.preSibling, [this]);
                if (!newParent.expanded) {
                    newParent.setExpanded(true);
                }
                success = true;
            }
            return success;
        };
        Node.prototype.upMove = function () {
            var success = false;
            var iIndex = this.siblingIndex(), belongArray = this.parent ? this.parent.children : this.tree.roots, orgPre = this.preSibling;
            if (this.canUpMove()) {
                if (orgPre.preSibling) {
                    orgPre.preSibling.setNextSibling(this);
                } else {
                    this.preSibling = null;
                }
                orgPre.setNextSibling(this.nextSibling);
                this.setNextSibling(orgPre);
                belongArray.splice(iIndex, 1);
                belongArray.splice(iIndex - 1, 0, this);
                this.tree.sortTreeItems();
                success = true;
            }
            return success;
        };
        Node.prototype.downMove = function () {
            var success = false;
            var iIndex = this.siblingIndex(), belongArray = this.parent ? this.parent.children : this.tree.roots, orgNext = this.nextSibling;
            if (this.canDownMove()) {
                if (this.preSibling) {
                    this.preSibling.setNextSibling(orgNext);
                } else if (orgNext) {
                    orgNext.preSibling = null;
                }
                this.setNextSibling(orgNext.nextSibling);
                orgNext.setNextSibling(this);
                belongArray.splice(iIndex, 1);
                belongArray.splice(iIndex + 1, 0, this);
                this.tree.sortTreeItems();
                success = true;
            }
            return success;
        };

        var Tree = function (owner) {
            this.owner = owner;
            this.nodes = {};
            this.roots = [];
            this.items = [];
            this.prefix = 'id_';
            this.selected = null;

            var _MaxID = 0;
            this.newNodeID = function (id) {
                if (arguments.length === 0) {
                    _MaxID += 1;
                    return _MaxID;
                } else {
                    _MaxID = Math.max(_MaxID, id);
                }
            };

            var rootId = -1;
            this.rootID = function () {
                return rootId;
            }
        };

        Tree.prototype.addNode = function (parent, nextSibling, id) {
            if(!isDef(id) || id == -1){
                return null;
            }
            var newNode = new Node(this, id);
            this.nodes[this.prefix + newNode.getID()] = newNode;
            if (nextSibling) {
                tools.addNodes(this, parent, [newNode], nextSibling.siblingIndex());
            } else {
                tools.addNodes(this, parent, [newNode]);
            }
            return newNode;
        };
        Tree.prototype.sortTreeItems = function () {
            var that = this;
            var addItems = function (nodes) {
                var i;
                for (i = 0; i < nodes.length; i++) {
                    that.items.push(nodes[i]);
                    addItems(nodes[i].children);
                }
            };
            this.items.splice(0, this.items.length);
            addItems(this.roots);
        };

        Tree.prototype.firstNode = function () {
            return this.roots.length === 0 ? null : this.roots[0];
        };
        Tree.prototype.findNode = function (id) {
            return this.nodes[this.prefix + id];
        };
        Tree.prototype.count = function () {
            var iCount = 0;
            if (this.roots.length !== 0) {
                iCount += this.roots.length;
                this.roots.forEach(function (node) {
                    iCount += node.posterityCount();
                });
            }
            return iCount;
        };

        Tree.prototype.insert = function (parentID, nextSiblingID, id) {
            var parent = !parentID || parentID === -1 ? null : this.nodes[this.prefix + parentID];
            var nextSibling = !nextSiblingID || nextSiblingID === -1 ? null: this.nodes[this.prefix + nextSiblingID];

            var newNode = this.addNode(parent, nextSibling, id);
            this.sortTreeItems();

            return newNode;
        };
        Tree.prototype.insertByDatas = function (datas) {
            let rst = [];
            for(let data of datas){
                this.nodes[this.prefix + data.ID] = new Node(this, data.ID);
                rst.push(this.nodes[this.prefix + data.ID]);
            }
            for(let data of datas){
                let node = this.nodes[this.prefix + data.ID];
                let parent = data.ParentID == -1 ? null : this.nodes[this.prefix + data.ParentID];
                node.parent = parent;
                if(!parent){
                    this.roots.push(node);
                }
                else {
                    parent.children.push(node);
                }
                let next = data.NextSiblingID == -1 ? null : this.nodes[this.prefix + data.NextSiblingID];
                node.nextSibling = next;
                if(next){
                    next.preSibling = node;
                }
            }
            //resort
            this.roots = tools.reSortNodes(this.roots, true);
            this.sortTreeItems();
            return rst;
        };
        Tree.prototype.delete = function (node) {
            var success = false;
            success=this.cascadeRemove(node);
            this.sortTreeItems();
            this.preSelected = null;
            return success;
        };
        Tree.prototype.cascadeRemove = function (node) {
            var success = false;
            var me = this;
            var removeNodes = function (node) {
                delete me.nodes[me.prefix + node.getID()];
                for(let ch of node.children){
                    removeNodes(ch);
                }
            };
            if (node) {
                removeNodes(node);
                if (node.preSibling) {
                    node.preSibling.setNextSibling(node.nextSibling);
                } else if (node.nextSibling) {
                    node.nextSibling.preSibling = null;
                }
                if (node.parent) {
                    node.parent.children.splice(node.siblingIndex(), 1);
                } else {
                    this.roots.splice(node.siblingIndex(), 1);
                }
                success = true;
            }
            return success;
        };

        Tree.prototype.m_delete = function (nodes) {//删除多个节点，级联删除
            for(let node of nodes){
                this.cascadeRemove(node);
            }
            this.sortTreeItems();
            return true;
        };

        Tree.prototype.singleDelete = function (node) {//只删除当前节点，不删除子节点
            var success = false;
            var me = this;
            if(node){
                delete me.nodes[me.prefix + node.getID()];
                if (node.parent) {//从父项的子节点中移除
                    node.parent.children.splice(node.siblingIndex(), 1);
                } else {
                    this.roots.splice(node.siblingIndex(), 1);
                }
                if(node.children.length>0){
                    if(node.preSibling){//子项变成前兄弟的子项
                        for(let c of node.children){
                            node.preSibling.addChild(c);
                        }
                    }else if(node.nextSibling){//没有前兄弟，有后兄弟
                        let oldChild = node.parent.children;
                        node.parent.children = [];
                        for(let c of node.children){
                            node.parent.addChild(c);
                        }
                        for(let oc of oldChild){
                            node.parent.addChild(oc);
                        }
                    }else {//都没有的情况
                         node.parent.children = [];//删除本身节点
                        for(let c of node.children){
                            node.parent.addChild(c);
                        }
                    }
                    this.sortTreeItems();
                    success = true;
                }
            }
            return success
        };
        Tree.prototype.getAllSubNode = function (node,nodeArray) {
          for(let c of node.children){
              nodeArray.push(c);
              this.getAllSubNode(c,nodeArray);
          }
        };
        Tree.prototype.getLeavesNodes = function (node) {//取该节点下的所有叶子节点
            let leaves = [];
            getLeaves(node,leaves);
            return leaves;

            function getLeaves(node,nodeArr) {
                if(node.children.length>0){
                    for(let ch of node.children){
                        getLeaves(ch,nodeArr);
                    }
                }else {
                    nodeArr.push(node);
                }
            }
        };
        Tree.prototype.getNodeByID = function (ID) {
          let node = this.nodes[this.prefix+ID];
          return node;
        };
        return new Tree(owner);
    }
};