/**
 *   jQuery.Markdown.js v0.0.10
 *   Author: taknakamu
 *   Git: https://github.com/taknakamu/jquery-markdown
 *
 *   Copyright (c) 2013 Kosuke Nakamuta
 *   Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php
 */
(function($) {
    $.fn.extend({
        markdown: function(options) {
            var defaults = {
                target_form : $(this).selector
            }
            options = $.extend(defaults, options);

            function markdownConvert(art_body) {
                var md = {
                    options : {
                        empty_mark : "\n" // "\n" or "<br>"
                    },
                    vs       : {},
                    variable : {
                        editbody : null,
                        stack : {
                            tag  : [],
                            text : []
                        },
                        text  : "",
                        html  : ""
                    },
                    convert : {
                        tags : {
                            hr : {
                                default_ : function()  { return "<hr />"; }
                            },
                            a  : {
                                default_ : function(href, v) { return '<a href="' + href + '">' + v + '</a>'; },
                                title   : function(href, v, title) { return '<a href="' + href + '" title="' + title + '" target="_blank">' + v + '</a>'; },
                                target_blank : function(href, v) { return '<a href="' + href + '" target="_blank">' + v + '</a>'; }
                            },
                            img : {
                                default_ : function(src, alt) { return '<img class="img-frame" style="max-width:100%;" src="' + src + '" alt="' + alt + '"/>'; },
                                title   : function(src, alt, title) { return '<img title="' + title + '" class="img-frame" style="max-width:100%;" src="' + src + '" alt="' + alt + '"/>'; }
                            },
                            pre : {
                                default_ : function(lang, v) { return '<pre class="brush: ' + lang.toLowerCase() + ';">' + v + '</pre>'; }
                            },
                            empty : {
                                default_ : function()  { return md.options.empty_mark; }
                            },
                            th : {
                                default_ : function(v) { return '<th>' + v + '</th>'; },
                                center  : function(v) { return '<th align="center">' + v + '</th>'; },
                                left    : function(v) { return '<th align="left">' + v + '</th>'; },
                                right   : function(v) { return '<th align="right">' + v + '</th>'; }
                            },
                            td : {
                                default_ : function(v) { return '<td>' + v + '</td>'; },
                                center  : function(v) { return '<td align="center">' + v + '</td>'; },
                                left    : function(v) { return '<td align="left">' + v + '</td>'; },
                                right   : function(v) { return '<td align="right">' + v + '</td>'; }
                            },
                            notag : {
                                default_ : function(tag, v) { return '<' + tag + '>' + v + '</' + tag + '>'; }
                            }
                        },
                        replacer : {
                            strong : ["__([^_]+)__", "\\\*\\\*([^*]+)\\\*\\\*"],
                            em     : ["_([^_]+)_", "\\\*([^*]+)\\\*"],
                            del    : ["~~([^~]+)~~"],
                            code   : ["`([^`]+)`"]
                        },
                        push : function(tag, text) {
                            if (!md.convert.inStack(tag)) {
                                md.variable.stack.tag.push(tag);
                            }
                            if (!md.variable.stack.text[tag]) {
                                md.variable.stack.text[tag] = [];
                            }
                            if (typeof text !== 'undefined') {
                                md.variable.stack.text[tag].push(text);
                            }
                            return this;
                        },
                        pushest : function(text) {
                            if (md.convert.inStack()) {
                                var maxi = md.variable.stack.tag.length - 1;
                                var tag  = md.variable.stack.tag[maxi];
                                return md.convert.push(tag, text);
                            }
                            return this;
                        },
                        pop : function(called, arguments_) {
                            if (md.convert.inStack()) {
                                var tag = md.variable.stack.tag.pop();
                                var text = innerHtml = "";
                                var args = (arguments_ || []);

                                while (typeof (text = md.variable.stack.text[tag].shift()) !== 'undefined') {
                                    if (tag === "pre" && args.length === 0) {
                                        args.push(text);
                                        continue;
                                    }
                                    md.convert.text(md.convert.text() + text);

                                    if (tag === "pre" || tag === "blockquote") {
                                        md.convert.text(md.convert.text() + md.options.empty_mark);
                                    }
                                }

                                if (tag === "blockquote") {
                                    md.convert.text(markdownConvert(md.convert.text()));
                                }

                                if (typeof called === 'undefined') {
                                    called = 'default_';
                                }

                                if (args.length === 0 && !md.convert.tags[tag]) {
                                    args.push(tag);
                                    tag = "notag";
                                }
                                args.push(md.convert.text());

                                innerHtml = md.convert.tags[tag][called].apply(this, args);

                                $.each(md.convert.replacer, function(rep, regs) {
                                    $(regs).each(function(i, exp) {
                                        var regexp = new RegExp(exp, "g");
                                        innerHtml = innerHtml.replace(regexp, '<' + rep + '>$1</' + rep + '>');
                                    });
                                });

                                if (!md.convert.inStack()) {
                                    md.convert.html(innerHtml);
                                }
                                md.convert.text("");

                                return innerHtml;
                            }
                            return this;
                        },
                        _string : function(variable, string) {
                            if (typeof string === 'undefined') {
                                return md.variable[variable];
                            } else {
                                md.variable[variable] = string;
                                return this;
                            }
                        },
                        text : function(text) { return md.convert._string("text", text); },
                        html : function(html) { return md.convert._string("html", html); },
                        inStack : function(tag) {
                            if (typeof tag === 'undefined') {
                                return (md.variable.stack.tag.length !== 0) ? true : false;
                            }

                            if (tag === "h" && md.convert.inStack()) {
                                var maxi = md.variable.stack.tag.length - 1;
                                if (md.variable.stack.tag[maxi].match(/^h[1-6]/)) {
                                    return true;
                                }
                            }
                            return ($.inArray(tag, md.variable.stack.tag) !== -1) ? true : false;
                        }
                    },
                    check : {
                        init  : function() {
                            md.vs = {};
                        },
                        valid : function(callmethod) {
                            if ('' !== md.convert.html()) {
                                return false;
                            }
                            if (md.convert.inStack() && !md.convert.inStack(callmethod)) {
                                return false;
                            }
                            return true;
                        },
                        _pre : function(i, v) {
                            return {
                                "nowv" : v,
                                "prev" : md.variable.editbody[i-1],
                                "nexv" : md.variable.editbody[i+1],
                                "tag"  : "",
                                "args" : false
                            };
                        },
                        isset : function(v) {
                            return (md.options.empty_mark !== v && "" !== v) ? true : false;
                        },
                        wrapper : function(callmethod, args) {
                            md.check.init();

                            if (md.check.valid(callmethod)) {
                                md.vs = md.check._pre.apply(this, args);
                            } else {
                                return false;
                            }
                            md.check.tags[callmethod].apply(this);

                            if (typeof md.vs.nexv === 'undefined') {
                                while (md.convert.inStack()) {
                                    md.convert.pushest(md.convert.pop());
                                }
                            }
                        },
                        tags : {
                            h : function(args) {
                                /**
                                 *  # H1 Text - ###### H6 Text
                                 */
                                if (null !== md.vs.nowv.match(/^#{1,6}\s/)) {
                                    var tag  = "h" + md.vs.nowv.match(/^#{1,6}/)[0].length;
                                    var text = md.vs.nowv.replace(/^#{1,6}\s/, "")
                                    md.convert.push(tag, text).pop();
                                } else if (md.check.isset(md.vs.nowv) && md.vs.nexv) {
                                    if (md.convert.inStack("h")) {
                                        md.convert.pop();
                                    }

                                    /**
                                     *  H1 Text
                                     *  ================
                                     */
                                    if (md.vs.nexv.match(/^=+$/)) {
                                        md.convert.push("h1", md.vs.nowv);
                                    }

                                    /**
                                     *  H2 Text
                                     *  ----------------
                                     */
                                    if (md.vs.nexv.match(/^\-+$/)) {
                                        md.convert.push("h2", md.vs.nowv);
                                    }
                                } else if (md.convert.inStack("h")) {
                                    md.convert.pop();
                                }
                            },
                            hr : function() {
                                var checker = function(mark) {
                                    if (md.vs.nowv.indexOf(mark) === 0) {
                                        var regexp = new RegExp(((mark === "*") ? "\\" + mark : mark), "g");

                                        if ("" === md.vs.nowv.replace(regexp, "")) {
                                            md.convert.push("hr").pop();
                                        }
                                    }
                                }

                                checker("-");
                                checker("*");
                                checker("_");
                            },
                            empty : function() {
                                if ("" === md.vs.nowv || md.vs.nowv.match(/^!?\[.*\]:.*/)) {
                                    md.convert.push("empty").pop();
                                }
                            },
                            pre : function() {
                                if (md.vs.nowv.indexOf("```") !== -1) {
                                    (!md.convert.inStack("pre")) ?
                                        md.convert.push("pre", md.vs.nowv.replace(/`/g, "")):
                                        md.convert.pop();
                                } else if (md.convert.inStack("pre")) {
                                    md.convert.pushest(md.vs.nowv);
                                }
                            },
                            blockquote : function(args) {
                                if (md.vs.nowv.match(/^(\s{1,3})?>\s?/)) {
                                    md.vs.nowv = md.vs.nowv.replace(/^(\s{1,3})?>\s?/, "");
                                    md.convert.push("blockquote", md.vs.nowv);
                                } else if (!md.check.isset(md.vs.nowv)) {
                                    if (typeof md.vs.nexv !== 'undefined' && md.check.isset(md.vs.nexv)) {
                                        if (!md.vs.nexv.match(/^(\s{1,3})?>/)) {
                                            md.convert.pop();
                                        }
                                    }
                                } else if (md.convert.inStack("blockquote")) {
                                    md.convert.pushest(md.vs.nowv);
                                }
                            },
                            ol : function() {
                                var nv = md.vs.nowv;
                                var nn = md.vs.nexv;

                                if (nv.match(/^(\s{0,7})?[0-9]+[.]\s/)) {
                                    if (!md.convert.inStack("ol")) {
                                        md.convert.push("ol");
                                        nv = nv.replace(/^\s+/g, "");
                                    }
                                }

                                if (md.convert.inStack("ol")) {
                                    if (nv.match(/^[0-9]+[.]\s/) || nv.match(/^[\*\+\-]\s/)) {
                                        lipop();
                                        md.convert.push("li", nv.replace(/^\s{0,7}?[0-9]+[.]\s(.*)/, "$1")
                                                                .replace(/^[\*\+\-]\s(.*)/, "$1"));
                                    } else if (nv.match(/^\s+/)) {

                                        nv = nv.replace(/^\s+/g, "");

                                        if (nv.match(/^[\*\+\-]\s/)) {
                                            md.convert.pushest(nv);

                                            if (nn.match(/^[0-9]+[.]\s/)) {
                                                lipop();
                                            }
                                        } else if (nv.match(/^.*/)) {
                                            md.convert.pushest(nv);
                                        } else if (!md.check.isset(nv)) {
                                            md.convert.pushest(nv);
                                        }

                                    } else if (!md.check.isset(nv)) {
                                        if (!md.check.isset(nn)) {
                                            md.convert.pushest(nv);
                                            return true;
                                        }

                                        if (nn && nn.match(/^\s+/)) {
                                            if (!nn.match(/^\s{1,7}?[\*\+\-]\s/)) {
                                                md.convert.pushest(nv);
                                                return true;
                                            }
                                        } else if (nn) {
                                            if (nn.match(/^[0-9]+[.]\s/)) {
                                                md.convert.pushest(nv);
                                                return true;
                                            }
                                        }

                                        lipop();
                                        md.convert.pop();
                                        md.addP = false;
                                    } else {
                                        md.convert.pushest(nv);
                                    }
                                }
                            },
                            ul : function() {
                                var nv = md.vs.nowv;
                                var nn = md.vs.nexv;

                                if (nv.match(/^(\s{0,7})?[\*\+\-]\s/)) {
                                    if (!md.convert.inStack("ul")) {
                                        md.convert.push("ul");
                                        nv = nv.replace(/^\s+/g, "");
                                    }
                                }

                                if (md.convert.inStack("ul")) {
                                    if (nv.match(/^[0-9]+[.]\s/) || nv.match(/^[\*\+\-]\s/)) {
                                        lipop();
                                        md.convert.push("li", nv.replace(/^\s{0,7}?[0-9]+[.]\s(.*)/, "$1")
                                                                .replace(/^[\*\+\-]\s(.*)/, "$1"));
                                    } else if (nv.match(/^\s+/)) {

                                        nv = nv.replace(/^\s+/g, "");

                                        if (nv.match(/^[0-9]+[.]\s/)) {
                                            md.convert.pushest(nv);

                                            if (nn.match(/^[\*\+\-]\s/)) {
                                                lipop();
                                            }
                                        } else if (nv.match(/^.*/)) {
                                            md.convert.pushest(nv);
                                        } else if (!md.check.isset(nv)) {
                                            md.convert.pushest(nv);
                                        }

                                    } else if (!md.check.isset(nv)) {
                                        if (!md.check.isset(nn)) {
                                            md.convert.pushest(nv);
                                            return true;
                                        }

                                        if (nn && nn.match(/^\s+/)) {
                                            if (!nn.match(/^\s{1,7}?[0-9]+[.]\s/)) {
                                                md.convert.pushest(nv);
                                                return true;
                                            }
                                        } else if (nn) {
                                            if (nn.match(/^[\*\+\-]\s/)) {
                                                md.convert.pushest(nv);
                                                return true;
                                            }
                                        }

                                        lipop();
                                        md.convert.pop();
                                        md.addP = false;
                                    } else {
                                        md.convert.pushest(nv);
                                    }
                                }
                            },
                            table : function() {
                                var nv = md.vs.nowv;
                                var nn = md.vs.nexv;

                                if (nn && nv.match(/\|/) && nn.match(/:?-+:?[\s+]?\|/)) {
                                    if (!md.convert.inStack("table")) {
                                        md.convert.push("table").push("thead").push("tr");

                                        var trs = nn.replace(/^\|(.*)\|$/, "$1").split("|");
                                        md.aligns = [];

                                        $(trs).each(function(i, v) {
                                            var repv = v.replace(/^\s+|\s+$/g, "");

                                            if (repv.match(/^:.*:$/)) {
                                                md.aligns[i] = "center";
                                            } else if (repv.match(/^:/)) {
                                                md.aligns[i] = "left";
                                            } else if (repv.match(/:$/)) {
                                                md.aligns[i] = "right";
                                            } else {
                                                md.aligns[i] = "default_";
                                            }
                                        });

                                        var ths = nv.replace(/^\|(.*)\|$/, "$1").split("|");

                                        $(ths).each(function(i, v) {
                                            md.convert.pushest(
                                                md.convert.push("th", v.replace(/^\s+|\s+$/g, "")).pop(md.aligns[i])
                                            );
                                        });

                                        md.convert.pushest((md.convert.pop()));
                                        md.convert.pushest((md.convert.pop()));
                                    }
                                } else if (nn && nv.match(/\|/)) {
                                    if (!md.convert.inStack("tbody")) {
                                        md.convert.push("tbody");
                                    } else {
                                        md.convert.push("tr");

                                        var tds = nv.replace(/^\|(.*)\|$/, "$1").split("|");

                                        $(tds).each(function(i, v) {
                                            md.convert.pushest(
                                                md.convert.push("td", v.replace(/^\s+|\s+$/g, "")).pop(md.aligns[i])
                                            );
                                        });

                                        md.convert.pushest((md.convert.pop()));
                                    }
                                } else if (md.convert.inStack("table")) {
                                    md.convert.pushest((md.convert.pop()));
                                    md.convert.pop();
                                }
                            },
                            p : function() {
                                if ((!md.vs.nowv.match(/^\s*?</) && md.vs.nowv !== "\n")) {
                                    if (!md.vs.nowv.match(/^\s*?</)) {
                                        if (!md.convert.inStack("p")) {
                                            md.convert.push("p");
                                        }

                                        var getTitle = function(src) {
                                            src = src.replace(/\\/g, "\\\\")
                                                     .replace(/\*/g, "\\*")
                                                     .replace(/\(/g, "\\(")
                                                     .replace(/\)/g, "\\)")
                                                     .replace(/\[/g, "\\[")
                                                     .replace(/\]/g, "\\]")
                                                     .replace(/\^/g, "\\^")
                                                     .replace(/\$/g, "\\$")
                                                     .replace(/\-/g, "\\-")
                                                     .replace(/\|/g, "\\|")
                                                     .replace(/\//g, "\\/");

                                            var title = null;
                                            var matches = new RegExp("\\[" + src + "\\]:", "i");

                                            $.each(md.variable.editbody, function(i, v) {
                                                if (v.match(matches)) {
                                                    if ((uri = v.match(/\[.*\]:(.*)/))) {
                                                        uri = uri[1].replace(/^\s+/, "");
                                                        src = uri.split(" ")[0];
                                                        title = uri.match(/.*"(.*)"/);
                                                        title = (title) ? title[1] : null;
                                                    }
                                                }
                                            });

                                            return [src, title];
                                        }

                                        var createtags = function(src, alt, title) {
                                            if (null !== md.vs.nowv.match(/!/)) {
                                                var img = md.convert.push("img").pop((title ? "title" : "default_"), [src, alt, title]);
                                                var a   = md.convert.push("a").pushest(img).pop("target_blank", [src]);
                                            } else {
                                                a = md.convert.push("a").pop((title ? "title" : "default_"), [src, alt, title]);
                                            }
                                            return a;
                                        }

                                        while (null !== md.vs.nowv.match(/!?\[.*?\]\(.*?\)/)) {
                                            var a_match = md.vs.nowv.match(/\[(.*?)\]\((.*?)\)/);
                                            var src_title = a_match[2].split(" ");
                                            var title = src_title[1] && src_title[1].replace(/"/g, "");
                                            var a = createtags(src_title[0], a_match[1], title);
                                            md.vs.nowv = md.vs.nowv.replace(a_match[0], a);
                                        }

                                        if (null !== md.vs.nowv.match(/!?\[.*\]\[.*\]/)) {
                                            var alt = md.vs.nowv.replace(/!?\[(.*)\]\[.*\]/, "$1");
                                            var src = md.vs.nowv.replace(/!?\[.*\]\[(.*)\]/, "$1");

                                            var title_matches = getTitle(src);
                                            src   = title_matches[0];
                                            title = title_matches[1];

                                            md.vs.nowv = createtags(src, alt, title);
                                        }

                                        if (null !== md.vs.nowv.match(/!?\[.*\]/)) {
                                            var alt = src = md.vs.nowv.replace(/^.*?!?\[(.*)\].*?/, "$1");

                                            var title_matches = getTitle(src);
                                            src   = title_matches[0];
                                            title = title_matches[1];

                                            var a = createtags(src, alt, title);
                                            md.vs.nowv = md.vs.nowv.replace(/^(.*)?!?\[(.*)\](.*)?/, "$1" + a + "$3");
                                        }

                                        if (typeof md.vs.nexv !== 'undefined') {
                                            if (md.convert.inStack("p")) {
                                                if (md.vs.nexv.match(/^=+$/)) {
                                                    md.convert.pop();
                                                    md.convert.push("h1", md.vs.nowv);
                                                    return true;
                                                }
                                                if (md.vs.nexv.match(/^\-+$/)) {
                                                    md.convert.pop();
                                                    md.convert.push("h2", md.vs.nowv);
                                                    return true;
                                                }
                                            }

                                            var convertedtext = markdownConvert(md.vs.nexv);

                                            if ("" !== convertedtext && "<p>" !== convertedtext.substr(0,3)) {
                                                md.convert.pushest(md.vs.nowv).pop();
                                            }
                                        }

                                        if (typeof md.vs.nexv === 'undefined') {
                                            md.convert.pushest(md.vs.nowv).pop();
                                        } else {
                                            md.convert.pushest(md.vs.nowv + '<br>');
                                        }
                                    }
                                }
                            },
                            etc : function() {
                                var innerHtml = md.vs.nowv;
/*
                                $.each(md.convert.replacer, function(rep, regs) {
                                    $(regs).each(function(i, exp) {
                                        var regexp = new RegExp(exp, "g");
                                        innerHtml = innerHtml.replace(regexp, '<' + rep + '>$1</' + rep + '>');
                                    });
                                });
*/
                                md.convert.html(innerHtml);
                            }
                        }
                    }
                };

                var lipop = function() {
                    var tag = "li";

                    if (md.convert.inStack(tag)) {
                        var textlength = getTextLength();
                        var textlengthAddSpace = getTextLength(true);
                        var converttext = getConvertText();

                        if (textlength !== 1 && textlength !== textlengthAddSpace) {
                            md.addP = true;
                        }

                        md.convert.pop();

                        var poped = markdownConvert(converttext);

                        if (!md.addP) {
                            poped = poped.replace("<p>", "").replace("</p>", "");
                        }

                        md.convert.push(tag, poped);
                        md.convert.pushest(md.convert.pop());
                    }
                };

                var getConvertText = function(mode_length) {
                    var tag = "li";
                    var textlength = 0;
                    var converttext = "";

                    $(md.variable.stack.text[tag]).each(function(i, v) {
                        if ("" !== v) {
                            textlength++;
                        }
                        converttext += v + md.options.empty_mark;
                    });

                    return ((mode_length) ? textlength : converttext);
                };

                var getTextLength = function(isset_) {
                    tag = "li";
                    return ((isset_) ? getConvertText(true) : md.variable.stack.text[tag].length);
                };

                md.variable.editbody = art_body.split(/\n/);

                var md_format = "";

                $.each(md.variable.editbody, function() {
                    var args = arguments;

                    $.each(md.check.tags, function(tagname) {
                        md.check.wrapper(tagname, args);
                    })
                    md_format += md.convert.html();
                    md.convert.html("");
                });
                return md_format;
            }

            return this.each(function() {

                var markdownconvert = "";

                $.each($(this), function(i, v) {
                    var v = ($(v).val() || $(v).html());
                    markdownconvert += markdownConvert.apply(this, [v]);
                });
                $(this).addClass("markdown-body").html(markdownconvert);

            });

        }
    });
})(jQuery);