/**
 * JSLogger (via Meta Tags)
 * @author Dan Allen (http://www.mojavelinux.com)
 */

function LogLevel() {}
LogLevel.TRACE = 0;
LogLevel.DEBUG = 1;
LogLevel.WARN = 2;
LogLevel.ERROR = 3;

LogLevel.valueOf = function(level) {
	switch (level) {
		case LogLevel.TRACE:
			return "TRACE";

		case LogLevel.DEBUG:
			return "DEBUG";

		case LogLevel.WARN:
			return "WARN";

		case LogLevel.ERROR:
			return "ERROR";
	}
}

function Logger() {}
Logger.level = LogLevel.DEBUG;
Logger.defaultLevel = LogLevel.DEBUG;
Logger.currentLine = 1;

Logger.isLoggable = function(level) {
	return (level >= Logger.level);
}

Logger.log = function (message, level) {
	if (typeof(level) == 'undefined') {
		level = Logger.defaultLevel;
	}

	if (!Logger.isLoggable(level))	{
		return;
	}

	var lines = message.split("\n");
	var headTag = document.getElementsByTagName("head")[0];
        var curDate = new Date()
        var curDateStr = "";

        var curHours = curDate.getHours();
        if (curHours < 10) {
           curDateStr += "0" + curHours;
        } else {
           curDateStr += curHours;
        }
        curDateStr += ":";

        var curMins = curDate.getMinutes();
        if (curMins < 10) {
           curDateStr += "0" + curMins;
        } else {
           curDateStr += curMins;
        }
        curDateStr += ":";

        var curSecs = curDate.getSeconds();
        if (curSecs < 10) {
           curDateStr += "0" + curSecs;
        } else {
           curDateStr += curSecs
        }

	for (var i = 1; i <= lines.length; i++) {
		var value = lines[i - 1];

		if (i == 1) {
			value = curDateStr + " - " + LogLevel.valueOf(level) + ": " + value;
		}
		else
		{
			value = "> " + value;
		}

		var metaTag = document.createElement("meta");
		metaTag.setAttribute("name", "X-jslog:" + Logger.currentLine++);
		metaTag.setAttribute("content", value);
		headTag.appendChild(metaTag);
	}
}

// make a convenience method log()
log = Logger.log;