package org.rx.common;

import org.slf4j.LoggerFactory;

import java.util.Collections;

import java.util.List;

import java.util.function.Function;

import java.util.regex.Pattern;

import static org.rx.common.Contract.require;

public final class Logger {

    static final org.slf4j.Logger log1, log2;

    static {

        System.setProperty("bootstrapPath", App.getBootstrapPath());

        log1 = LoggerFactory.getLogger("infoLogger");

        log2 = LoggerFactory.getLogger("errorLogger");

    }

    public static org.slf4j.Logger getSlf4j(Class signature) {

        return getSlf4j(signature, Collections.emptyList(), null);

    }

    public static org.slf4j.Logger getSlf4j(Class signature, List<String> regs, String cacheMethodName) {

        require(signature, regs);

        Function<String, org.slf4j.Logger> func = k -> {

            Class owner = signature;

            if (!regs.isEmpty()) {

                String fType;

                if ((fType = NQuery.of(Thread.currentThread().getStackTrace()).select(p -> p.getClassName())

                        .firstOrDefault(p -> NQuery.of(regs).any(reg -> Pattern.matches(reg, p)))) != null) {

                    owner = App.loadClass(fType, false);

                }

            }

            return org.slf4j.LoggerFactory.getLogger(owner);

        };

        return cacheMethodName != null ? App.getOrStore("Logger" + signature.getName() + cacheMethodName, func)

                : func.apply(null);

    }

    public static void debug(String format, Object... args) {

        if (!log1.isDebugEnabled()) {

            return;

        }

        String msg = args.length == 0 ? format : String.format(format, args);

        log1.debug(msg);

    }

    public static void info(String format, Object... args) {

        String msg = args.length == 0 ? format : String.format(format, args);

        log1.info(msg);

    }

    public static void error(Throwable ex, String format, Object... args) {

        String msg = args.length == 0 ? format : String.format(format, args);

        log2.error(msg, ex);

    }

}