export enum LogSeverity {
	FATAL,
	ERROR,
	WARN,
	INFO,
	DEBUG,
	TRACE
}

export enum LogModule {
	PROCESS,
	USER,
	DATABASE
}

abstract class Logger {
	readonly module = {
		...LogModule
	}

	abstract log(severity: LogSeverity, module: LogModule, message: string): void
	fatal(module: LogModule, message: string): void { this.log(LogSeverity.FATAL, module, message) }
	error(module: LogModule, message: string): void { this.log(LogSeverity.ERROR, module, message) }
	warn(module: LogModule, message: string): void { this.log(LogSeverity.WARN, module, message) }
	info(module: LogModule, message: string): void { this.log(LogSeverity.INFO, module, message) }
	debug(module: LogModule, message: string): void { this.log(LogSeverity.DEBUG, module, message) }
	trace(module: LogModule, message: string): void { this.log(LogSeverity.TRACE, module, message) }
}

function create_log_string(severity: LogSeverity, module: LogModule, message: string): string {
	return `${(new Date()).toISOString()} [${LogModule[module]}] [${LogSeverity[severity]}] ${message}`
}

class DebugLogger extends Logger {

	log(severity: LogSeverity, module: LogModule, message: string): void {
		console.log(create_log_string(severity, module, message))
	}
}

const _logger: Logger = new DebugLogger()


export default _logger