///import editor.js
///import core/utils.js
///import core/dom/dom.js
///import core/dom/dtd.js
///import core/htmlparser.js
//模拟的节点类
//by zhanyi
(function () {
    var uNode = UE.uNode = function (obj) {
        this.type = obj.type;
        this.data = obj.data;
        this.tagName = obj.tagName;
        this.parentNode = obj.parentNode;
        this.attrs = obj.attrs || {};
        this.children = obj.children;
    };
    var indentChar = '    ',
        breakChar = '\n';

    function insertLine(arr, current, begin) {
        arr.push(breakChar);
        return current + (begin ? 1 : -1);
    }

    function insertIndent(arr, current) {
        //插入缩进
        for (var i = 0; i < current; i++) {
            arr.push(indentChar);
        }
    }

    //创建uNode的静态方法
    //支持标签和html
    uNode.createElement = function (html) {
        if (/[<>]/.test(html)) {
            return UE.htmlparser(html).children[0]
        } else {
            return new uNode({
                type:'element',
                children:[],
                tagName:html
            })
        }
    };
    uNode.createText = function (data) {
        return new UE.uNode({
            type:'text',
            'data':data || ''
        })
    };
    function nodeToHtml(node, arr, formatter, current) {
        switch (node.type) {
            case 'root':
                for (var i = 0, ci; ci = node.children[i++];) {
                    //插入新行
                    if (formatter && ci.type == 'element' && !dtd.$inline[ci.tagName] && i > 1) {
                        insertLine(arr, current, true);
                        insertIndent(arr, current)
                    }
                    nodeToHtml(ci, arr, formatter, current)
                }
                break;
            case 'text':
                isText(node, arr);
                break;
            case 'element':
                isElement(node, arr, formatter, current);
                break;
            case 'comment':
                isComment(node, arr, formatter);
        }
        return arr;
    }

    function isText(node, arr) {
        arr.push(node.data)
    }

    function isElement(node, arr, formatter, current) {
        var attrhtml = '';
        if (node.attrs) {
            attrhtml = [];
            var attrs = node.attrs;
            for (var a in attrs) {
                attrhtml.push(a + (attrs[a] !== undefined ? '="' + utils.unhtml(attrs[a]) + '"' : ''))
            }
            attrhtml = attrhtml.join(' ');
        }
        arr.push('<' + node.tagName +
            (attrhtml ? ' ' + attrhtml + ' ' : '') +
            (dtd.$empty[node.tagName] ? '\/' : '' ) + '>'
        );
        //插入新行
        if (formatter &&  !dtd.$inline[node.tagName]) {
            current = insertLine(arr, current, true);
            insertIndent(arr, current)
        }
        if (node.children && node.children.length) {
            for (var i = 0, ci; ci = node.children[i++];) {
                if (formatter && ci.type == 'element' &&  !dtd.$inline[ci.tagName] && i > 1) {
                    insertLine(arr, current);
                    insertIndent(arr, current)
                }
                nodeToHtml(ci, arr, formatter, current)
            }
        }
        if (!dtd.$empty[node.tagName]) {
            if (formatter && !dtd.$inline[node.tagName]) {
                current = insertLine(arr, current);
                insertIndent(arr, current)
            }
            arr.push('<\/' + node.tagName + '>');
        }

    }

    function isComment(node, arr) {
        arr.push('<!--' + node.data + '-->');
    }

    function getNodeById(root, id) {
        var node;
        if (root.type == 'element' && root.getAttr('id') == id) {
            return root;
        }
        if (root.children && root.children.length) {
            for (var i = 0, ci; ci = root.children[i++];) {
                if (node = getNodeById(ci, id)) {
                    return node;
                }
            }
        }
    }

    function getNodesByTagName(node, tagName, arr) {
        if (node.type == 'element' && node.tagName == tagName) {
            arr.push(node);
        }
        if (node.children && node.children.length) {
            for (var i = 0, ci; ci = node.children[i++];) {
                getNodesByTagName(ci, tagName, arr)
            }
        }
    }
    function nodeTraversal(root,fn){
        if(root.children && root.children.length){
            for(var i= 0,ci;ci=root.children[i];){
                nodeTraversal(ci,fn);
                //ci被替换的情况，这里就不再走 fn了
                if(ci.parentNode ){
                    if(ci.children){
                        fn(ci)
                    }
                    if(ci.parentNode) i++
                }
            }
        }else{
            fn(root)
        }

    }
    uNode.prototype = {
        toHtml:function (formatter) {
            var arr = [];
            nodeToHtml(this, arr, formatter, 0);
            return arr.join('')
        },
        innerHTML:function (htmlstr) {
            if (this.type != 'element' || dtd.$empty[this.tagName]) {
                return this;
            }
            if (htmlstr) {
                if(this.children){
                    for (var i = 0, ci; ci = this.children[i++];) {
                        ci.parentNode = null;
                    }
                }
                this.children = [];
                var tmpRoot = UE.htmlparser(htmlstr);
                for (var i = 0, ci; ci = tmpRoot.children[i++];) {
                    this.children.push(ci);
                    ci.parentNode = this;
                }
                return this;
            } else {
                var tmpRoot = new UE.uNode({
                    type:'root',
                    children:this.children
                });
                return tmpRoot.toHtml();
            }
        },
        innerText:function () {
            if (this.type != 'element' || dtd.$empty[this.tagName]) {
                return this;
            }
            var html = this.toHtml();
            return html.replace(/<[^>]+>/g, '');
        },
        getData:function () {
            if (this.type == 'element')
                return '';
            return this.data
        },
        firstChild:function () {
//            if (this.type != 'element' || dtd.$empty[this.tagName]) {
//                return this;
//            }
            return this.children ? this.children[0] : null;
        },
        lastChild:function () {
//            if (this.type != 'element' || dtd.$empty[this.tagName] ) {
//                return this;
//            }
            return this.children ? this.children[this.children.length - 1] : null;
        },
        previousSibling : function(){
            var parent = this.parentNode;
            for (var i = 0, ci; ci = parent.children[i]; i++) {
                if (ci === this) {
                   return i == 0 ? null : parent.children[i-1];
                }
            }

        },
        nextSibling : function(){
            var parent = this.parentNode;
            for (var i = 0, ci; ci = parent.children[i++];) {
                if (ci === this) {
                    return parent.children[i];
                }
            }
        },
        replaceChild:function (target, source) {
            if (this.children) {
                if(target.parentNode){
                    target.parentNode.removeChild(target);
                }
                for (var i = 0, ci; ci = this.children[i]; i++) {
                    if (ci === source) {
                        this.children.splice(i, 1, target);
                        source.parentNode = null;
                        target.parentNode = this;
                        return target;
                    }
                }
            }
        },
        appendChild:function (node) {
            if (this.type == 'root' || (this.type == 'element' && !dtd.$empty[this.tagName])) {
                if (!this.children) {
                    this.children = []
                }
                if(node.parentNode){
                    node.parentNode.removeChild(node);
                }
                for (var i = 0, ci; ci = this.children[i]; i++) {
                    if (ci === node) {
                        this.children.splice(i, 1);
                        break;
                    }
                }
                this.children.push(node);
                node.parentNode = this;
                return node;
            }


        },
        insertBefore:function (target, source) {
            if (this.children) {
                if(target.parentNode){
                    target.parentNode.removeChild(target);
                }
                for (var i = 0, ci; ci = this.children[i]; i++) {
                    if (ci === source) {
                        this.children.splice(i, 0, target);
                        target.parentNode = this;
                        return target;
                    }
                }

            }
        },
        insertAfter:function (target, source) {
            if (this.children) {
                if(target.parentNode){
                    target.parentNode.removeChild(target);
                }
                for (var i = 0, ci; ci = this.children[i]; i++) {
                    if (ci === source) {
                        this.children.splice(i + 1, 0, target);
                        target.parentNode = this;
                        return target;
                    }

                }
            }
        },
        removeChild:function (node,keepChildren) {
            if (this.children) {
                for (var i = 0, ci; ci = this.children[i]; i++) {
                    if (ci === node) {
                        this.children.splice(i, 1);
                        ci.parentNode = null;
                        if(keepChildren && ci.children && ci.children.length){
                            for(var j= 0,cj;cj=ci.children[j];j++){
                                this.children.splice(i+j,0,cj);
                                cj.parentNode = this;

                            }
                        }
                        return ci;
                    }
                }
            }
        },
        getAttr:function (attrName) {
            return this.attrs && this.attrs[attrName.toLowerCase()]
        },
        setAttr:function (attrName, attrVal) {
            if (!attrName) {
                delete this.attrs;
                return;
            }
            if(!this.attrs){
                this.attrs = {};
            }
            if (utils.isObject(attrName)) {
                for (var a in attrName) {
                    if (!attrName[a]) {
                        delete this.attrs[a]
                    } else {
                        this.attrs[a.toLowerCase()] = attrName[a];
                    }
                }
            } else {
                if (!attrVal) {
                    delete this.attrs[attrName]
                } else {
                    this.attrs[attrName.toLowerCase()] = attrVal;
                }

            }
        },
        getIndex:function(){
            var parent = this.parentNode;
            for(var i= 0,ci;ci=parent.children[i];i++){
                if(ci === this){
                    return i;
                }
            }
            return -1;
        },
        getNodeById:function (id) {
            var node;
            if (this.children && this.children.length) {
                for (var i = 0, ci; ci = this.children[i++];) {
                    if (node = getNodeById(ci, id)) {
                        return node;
                    }
                }
            }
        },
        getNodesByTagName:function (tagNames) {
            tagNames = utils.trim(tagNames).replace(/[ ]{2,}/g, ' ').split(' ');
            var arr = [], me = this;
            utils.each(tagNames, function (tagName) {
                if (me.children && me.children.length) {
                    for (var i = 0, ci; ci = me.children[i++];) {
                        getNodesByTagName(ci, tagName, arr)
                    }
                }
            });
            return arr;
        },
        getStyle:function (name) {
            var cssStyle = this.getAttr('style');
            if (!cssStyle) {
                return ''
            }
            var reg = new RegExp(name + ':([^;]+)');
            var match = cssStyle.match(reg);
            if (match && match[0]) {
                return match[1]
            }
            return '';
        },
        setStyle:function (name, val) {
            function exec(name, val) {
                var reg = new RegExp(name + ':([^;]+);?', 'gi');
                cssStyle = cssStyle.replace(reg, '');
                if (val) {
                    cssStyle = name + ':' + utils.unhtml(val) + ';' + cssStyle
                }

            }

            var cssStyle = this.getAttr('style');
            if (!cssStyle) {
                cssStyle = '';
            }
            if (utils.isObject(name)) {
                for (var a in name) {
                    exec(a, name[a])
                }
            } else {
                exec(name, val)
            }
            this.setAttr('style', cssStyle)
        },
        traversal:function(fn){
            if(this.children && this.children.length){
                nodeTraversal(this,fn);
            };
            return this;
        }
    }
})();