var LoggerSystem = require('./system');
var LogWriter = require('./writer');
var LogAdapter = require('./adapter');

var util = require('util');

var Logger = class Logger {

	constructor(name) {
		this.name = name;
		this.lastTime = process.hrtime();
		this.count = 0;
	}
	base(LVL,args) {
		var msg = args.map(a => (typeof(a) == "object")? util.inspect(a):a).join(" ");
		this.sys.base(this,LVL,msg);
		this.lastTime = process.hrtime();
		this.count++;
	}

	info(...args) {
		this.base(Logger.INFO,args);
	}
	error(...args) {
		this.base(Logger.ERROR,args);
	}
	warn(...args) {
		this.base(Logger.WARN,args);
	}
	verb(...args) {
		this.base(Logger.VERBOSE,args);
	}
}


Logger.root = new LoggerSystem();
// statics
	
Logger.createLogger = function (name) {
	var logger = new Logger(name);
	logger.sys = Logger.root;
	return logger;
}

// By order of importance
//Logger.logTags = ["ERROR","WARN","INFO","VERBOSE"];
for( var i in LoggerSystem.TAGS) {
	Logger[LoggerSystem.TAGS[i]] = i;
}

// Filter functions
//
//
Logger.le = function(TAG) {
	return function(itag) {
		return itag <= TAG;
	}
}
Logger.ge = function(TAG) {
	return function(itag) {
		return itag <= TAG;
	}
}
Logger.eq = function(TAG) {
	return function(itag) {
		return itag == TAG;
	}
};
Logger.in = function(args) {
	return function(itag) {
		var TAGS = args;
		return TAGS.indexOf(itag) >= 0;	
	}
}


Logger.reset = function reset() {
	Logger.root.adapters = [];
}

Logger.setup = function (conf) {
	var writerInst = [];	

	Logger.root.loggerLevels = conf.loggers;

	conf.adapters.forEach(function(ad) {
		var adapterWriter = [];
		ad.writers.forEach(function(e) { // Writer selection
			// Use same or create new, should be stored in Logger somehow	
			if(conf.writers[e] == undefined) {
				throw new Error	("Adapter requested an inexistent writer: '" + e + "'");
			}
			if(Logger.root.writers[conf.writers[e].writer] == undefined) {
				throw new Error ("Requested writer: '" + conf.writers[e].writer + "' does not exists in context");
			}
			if(writerInst[e] == undefined) {
				writerInst[e] = new Logger.root.writers[conf.writers[e].writer](conf.writers[e].opts);
			}
		
			if(writerInst[e] != undefined) {
				adapterWriter.push( writerInst[e]);
			};
		})
		var levels = [];
		ad.levels.forEach(function(e) {
			levels.push(Logger[e]);		
		});
		var adapter = new LogAdapter(Logger.in(levels),adapterWriter,ad.fmt);
		adapter.loggerLevels = ad.loggers;
		Logger.root.adapter(adapter);
	})
}



module.exports = Logger;