// doT.js
// 2011, Laura Doktorova, https://github.com/olado/doT
// Licensed under the MIT license.

(function () {
	"use strict";

	var doT = {
		version: '1.0.1',
		templateSettings: {
			evaluate: /\{\{([\s\S]+?(\}?)+)\}\}/g,
			interpolate: /\{\{=([\s\S]+?)\}\}/g,
			encode: /\{\{!([\s\S]+?)\}\}/g,
			use: /\{\{#([\s\S]+?)\}\}/g,
			useParams: /(^|[^\w$])def(?:\.|\[[\'\"])([\w$\.]+)(?:[\'\"]\])?\s*\:\s*([\w$\.]+|\"[^\"]+\"|\'[^\']+\'|\{[^\}]+\})/g,
			define: /\{\{##\s*([\w\.$]+)\s*(\:|=)([\s\S]+?)#\}\}/g,
			defineParams: /^\s*([\w$]+):([\s\S]+)/,
			conditional: /\{\{\?(\?)?\s*([\s\S]*?)\s*\}\}/g,
			iterate: /\{\{~\s*(?:\}\}|([\s\S]+?)\s*\:\s*([\w$]+)\s*(?:\:\s*([\w$]+))?\s*\}\})/g,
			varname: 'it',
			extvarname: 'ext',
			strip: true,
			append: true,
			selfcontained: false
		},
		template: undefined, //fn, compile template
		compile: undefined  //fn, for express
	}, global;

	if (typeof module !== 'undefined' && module.exports) {
		module.exports = doT;
	} else if (typeof define === 'function' && define.amd) {
		define(function () { return doT; });
	} else {
		global = (function () { return this || (0, eval)('this'); }());
		global.doT = doT;
	}

	function encodeHTMLSource() {
		var encodeHTMLRules = { "&": "&#38;", "<": "&#60;", ">": "&#62;", '"': '&#34;', "'": '&#39;', "/": '&#47;' },
			matchHTML = /&(?!#?\w+;)|<|>|"|'|\//g;
		return function () {
			return this ? this.replace(matchHTML, function (m) { return encodeHTMLRules[m] || m; }) : this;
		};
	}
	String.prototype.encodeHTML = encodeHTMLSource();

	var startend = {
		append: { start: "'+(", end: ")+'", endencode: "||'').toString().encodeHTML()+'" },
		split: { start: "';out+=(", end: ");out+='", endencode: "||'').toString().encodeHTML();out+='" }
	}, skip = /$^/;

	function resolveDefs(c, block, def) {
		return ((typeof block === 'string') ? block : block.toString())
		.replace(c.define || skip, function (m, code, assign, value) {
			if (code.indexOf('def.') === 0) {
				code = code.substring(4);
			}
			if (!(code in def)) {
				if (assign === ':') {
					if (c.defineParams) value.replace(c.defineParams, function (m, param, v) {
						def[code] = { arg: param, text: v };
					});
					if (!(code in def)) def[code] = value;
				} else {
					new Function("def", "def['" + code + "']=" + value)(def);
				}
			}
			return '';
		})
		.replace(c.use || skip, function (m, code) {
			if (c.useParams) code = code.replace(c.useParams, function (m, s, d, param) {
				if (def[d] && def[d].arg && param) {
					var rw = (d + ":" + param).replace(/'|\\/g, '_');
					def.__exp = def.__exp || {};
					def.__exp[rw] = def[d].text.replace(new RegExp("(^|[^\\w$])" + def[d].arg + "([^\\w$])", "g"), "$1" + param + "$2");
					return s + "def.__exp['" + rw + "']";
				}
			});
			var v = new Function("def", c.extvarname, "return " + code)(def);
			return v ? resolveDefs(c, v, def) : v;
		});
	}

	function unescape(code) {
		return code.replace(/\\('|\\)/g, "$1").replace(/[\r\t\n]/g, ' ');
	}

	doT.template = function (tmpl, c, def) {
		c = c || doT.templateSettings;
		var cse = c.append ? startend.append : startend.split, needhtmlencode, sid = 0, indv,
			str = (c.use || c.define) ? resolveDefs(c, tmpl, def || {}) : tmpl;

		str = ("var out='" + (c.strip ? str.replace(/(^|\r|\n)\t* +| +\t*(\r|\n|$)/g, ' ')
					.replace(/\r|\n|\t|\/\*[\s\S]*?\*\//g, '') : str)
			.replace(/'|\\/g, '\\$&')
			.replace(c.interpolate || skip, function (m, code) {
				return cse.start + unescape(code) + cse.end;
			})
			.replace(c.encode || skip, function (m, code) {
				needhtmlencode = true;
				return cse.start + unescape(code) + cse.endencode;
			})
			.replace(c.conditional || skip, function (m, elsecase, code) {
				return elsecase ?
					(code ? "';}else if(" + unescape(code) + "){out+='" : "';}else{out+='") :
					(code ? "';if(" + unescape(code) + "){out+='" : "';}out+='");
			})
			.replace(c.iterate || skip, function (m, iterate, vname, iname) {
				if (!iterate) return "';} } out+='";
				sid += 1; indv = iname || "i" + sid; iterate = unescape(iterate);
				return "';var arr" + sid + "=" + iterate + ";if(arr" + sid + "){var " + vname + "," + indv + "=-1,l" + sid + "=arr" + sid + ".length-1;while(" + indv + "<l" + sid + "){"
					+ vname + "=arr" + sid + "[" + indv + "+=1];out+='";
			})
			.replace(c.evaluate || skip, function (m, code) {
				return "';" + unescape(code) + "out+='";
			})
			+ "';return out;")
			.replace(/\n/g, '\\n').replace(/\t/g, '\\t').replace(/\r/g, '\\r')
			.replace(/(\s|;|\}|^|\{)out\+='';/g, '$1').replace(/\+''/g, '')
			.replace(/(\s|;|\}|^|\{)out\+=''\+/g, '$1out+=');

		if (needhtmlencode && c.selfcontained) {
			str = "String.prototype.encodeHTML=(" + encodeHTMLSource.toString() + "());" + str;
		}
		try {
			return new Function(c.varname, c.extvarname, str);
		} catch (e) {
			if (typeof console !== 'undefined') console.log("Could not create a template function: " + str);
			throw e;
		}
	};

	doT.compile = function (tmpl, def) {
		return doT.template(tmpl, null, def);
	};

	//add jquery support
	if (window.jQuery) {
		window.jQuery.fn.extend({
			doT: function () {
				var args = Array.prototype.slice.call(arguments);
				args.unshift(this.text());
				return doT.template.apply(this, args);
			}
		});
	}
}());