package swap.log;

import java.time.Instant;

public abstract class Log {
	static final int LOW = 0;
	static final int HINT = 3;
	static final int DEFAULT = 4;
	static final int WARNING = 5;
	static final int ERROR = 7;
	static final int HIGH = 10;
	
	public static int saneLevel(int level) {
		if (level < LOW) {
			return LOW;
		} else if (level > HIGH) {
			return HIGH;
		} else {
			return level;
		}
	}
	
	public static String stringLevel(int level) {
		level = saneLevel(level);
		switch(level) {
		case LOW:
			return "LOW";
		case HINT:
			return "HINT";
		case DEFAULT:
			return "DEFAULT";
		case WARNING:
			return "WARNING";
		case ERROR:
			return "ERROR";
		case HIGH:
			return "HIGH";
		default:
			return "LEVEL " + level;
		}
	}
	
	public static String stringLine(Object[] line) {
		String r = "";
		boolean first = true;
		for (Object o: line) {
			if (first) {
				first = false;
			} else {
				r += " ";
			}
			r += o;
		}
		return r;
	}
	
	public static String stringThread() {
		return Thread.currentThread().toString();
	}
	
	public static String stringTime() {
		return Instant.now().toString();
	}
	
	protected abstract void doWriteLine(int saneLevel, Object[] line);
	
	public synchronized final void writeLine(int level, Object...line) {
		doWriteLine(saneLevel(level), line);
	}
	
	public synchronized final void line(Object...line) {
		doWriteLine(DEFAULT, line);
	}
}