package io.github.lonamiwebs.overgram.logging;

import java.io.PrintStream;
import java.util.IllegalFormatConversionException;

public class Log {
    private static final int LEVEL;
    private static final PrintStream OUTPUT;

    // Level - Name
    // 1     - debug
    // 2     - info
    // 3     - warning
    // 4     - error/exception
    // 5     - none
    static {
        LEVEL = 1;
        OUTPUT = System.err;
    }

    public static void debug(final Object message, final Object... args) {
        if (LEVEL <= 1 && OUTPUT != null) {
            show(message, args);
        }
    }

    public static void info(final Object message, final Object... args) {
        if (LEVEL <= 2 && OUTPUT != null) {
            show(message, args);
        }
    }

    public static void warn(final Object message, final Object... args) {
        if (LEVEL <= 3 && OUTPUT != null) {
            show(message, args);
        }
    }

    public static void error(final Object message, final Object... args) {
        if (LEVEL <= 4 && OUTPUT != null) {
            show(message, args);
        }
    }

    public static void exception(final Throwable exception, final Object message, final Object... args) {
        if (LEVEL <= 4 && OUTPUT != null) {
            show(message, args);
            exception.printStackTrace(OUTPUT);
        }
    }

    private static void show(Object message, Object... args) {
        if (args.length == 0) {
            OUTPUT.println(message);
        } else {
            try {
                OUTPUT.println(String.format(message.toString(), args));
            } catch (IllegalFormatConversionException ignored) {
                OUTPUT.println(message);
            }
        }
    }
}