package kernel.log;

import haxe.ds.ReadOnlyArray;
#if webconsole
import lib.Debug;
#end

using tink.CoreApi;

/**
	Central logging system.
**/
class Log {
	public static var instance:Log;

	private static inline final MAX_LINES:Int = 100;

	public final onLog:Signal<LogLine>;

	private final onLogTrigger:SignalTrigger<LogLine> = new SignalTrigger();
	private final logLines:Array<LogLine> = [];

	public function new() {
		onLog = onLogTrigger.asSignal();
	}

	public static function info(msg:Dynamic, ?pos:haxe.PosInfos) {
		instance.log({level: Info, message: Std.string(msg),time: 0},pos);
	}

	public static function warn(msg:Dynamic, ?pos:haxe.PosInfos) {
		instance.log({level: Warn, message: Std.string(msg),time: 0},pos);
	}

	public static function error(msg:Dynamic, ?pos:haxe.PosInfos) {
		instance.log({level: Error, message: Std.string(msg),time: 0},pos);
	}

	public static function debug(msg:Dynamic, ?pos:haxe.PosInfos) {
		#if debug
		instance.log({level: Debug, message: Std.string(msg),time: 0},pos);
		#end
	}

	public static function silly(msg:Dynamic, ?pos:haxe.PosInfos) {
		instance.log({level: Silly, message: Std.string(msg),time: 0},pos);
	}

	private function log(line: LogLine, ?pos:haxe.PosInfos) {
		line.origin = pos.className;
		logLines.push(line);

		if (logLines.length > MAX_LINES) {
			logLines.shift();
		}

		#if webconsole
		Debug.printWeb('[${Std.string(line.level)}][${line.origin}] ${line.message}');
		#end

		onLogTrigger.trigger(line);
	}

	public function getLines():ReadOnlyArray<LogLine> {
		return logLines;
	}
}