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/* DreemGL is a collaboration between Teeming Society & Samsung Electronics, sponsored by Samsung and others.
   Copyright 2015-2016 Teeming Society. Licensed under the Apache License, Version 2.0 (the "License"); You may not use this file except in compliance with the License.
   You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing,
   software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and limitations under the License.*/


define.class(function($ui$, view, label){
        // Markdown display class - this element can display a small subset of the "markdown" syntax. See the SUPPORTED_MARKDOWN.md file in the docviewer for supported elements.

        this.attributes = {
                // Body can be a single string or an array of strings - each string will be its own paragraph.
                body: {},

                // alignment of the bodytext.
                // accepted values are "left", "right", "justify" and "center"
                align: Config({type: String,  value: "left"}),

                // Base fontsize - heading sizes will be multiples of this value.
                fontsize: Config({type:Number, value: 14}),

                // The color to use as the default color for this textblock.
                fontcolor: Config({type:vec4, value: vec4("#202020")})
        }

        this.flexdirection = "column"

        var markdown = this.constructor

        // Create a set of visual elements for an array of textlines.
        this.buildMarkdown= function(lines){
                var res = [];

                for(var a in lines)
                {
                        var L = lines[a];
                        var LT = L.trim();
                        if (LT.length == 0) continue;

                        var fontsize = this.fontsize;
                        var Margin = vec4(10,10,10,10);
                        if (LT.indexOf("######") == 0){
                                L = LT.substr(7);
                                fontsize = this.fontsize * (16. / 14.);
                        } else if (LT.indexOf("#####") == 0){
                                L = LT.substr(6);
                                fontsize = this.fontsize * (18. / 14.);
                        } else if (LT.indexOf("####") == 0){
                                L = LT.substr(5);
                                fontsize = this.fontsize * (22. / 14.);
                        } else if (LT.indexOf("###") == 0){
                                L = LT.substr(4);
                                fontsize = this.fontsize * (25. / 14.);
                        } else if (LT.indexOf("##") == 0){
                                L = LT.substr(3);
                                fontsize = this.fontsize * (27. / 14.);
                        } else if (LT.indexOf("#") == 0){
                                L = LT.substr(2);
                                fontsize = this.fontsize * (30. / 14.);
                        } else {
                                // default text
                        }

                        res.push(label({fgcolor: this.fontcolor, bgcolor:NaN, margin: Margin, text: L, fontsize: fontsize, multiline: true, align: this.align}));
                }

                return res;
        }

        this.render = function(){
                if (!this.body) return [];
                if (typeof(this.body) === "array" || (this.body.length && typeof(this.body) !== "string" ) ){
                                // join parts and do markup

                        var lines = [];
                        for(var i = 0;i<this.body.length;i++)
                        {
                                var splitted = this.body[i].split('\n')
                                for(var j in splitted) lines.push(splitted[j]);
                        }

                        return this.buildMarkdown(lines);;
                }
                else{
                        if (typeof(this.body) === "string"){

                                var lines = [];
                                var splitted = this.body.split('\n');
                                for(var j in splitted) lines.push(splitted[j]);

                                return this.buildMarkdown(lines);
                        }
                        else{
                                return [label({fgcolor:"#303030", bgcolor:NaN, text:"unknown format for body!\n\n" + this.body.toString(), multiline: true, fontsize:12})];
                        }
                }
        }

        this.constructor.examples = {
                Usage:function(){
                        return [
                                markdown({align:"right", body:"# Heading on the right\nBodytext"})
                                ,markdown({align:"justify",body:"## Justified text\nShould space out neatly on the line."})
                                ,markdown({align:"left",body:"### Basic leftalignment\nAs usual"})
                                ,markdown({align:"center",body:"#### CENTER STAGE\nText in the middle"})
                        ]
                }
        }
});