/*
 * Copyright 2016 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.gradle.internal.logging.slf4j;

import org.gradle.api.logging.LogLevel;
import org.gradle.api.logging.Logger;
import org.gradle.api.logging.Logging;
import org.gradle.internal.logging.events.LogEvent;
import org.gradle.internal.logging.events.OutputEventListener;
import org.gradle.internal.operations.CurrentBuildOperationRef;
import org.gradle.internal.operations.OperationIdentifier;
import org.gradle.internal.time.Clock;
import org.slf4j.Marker;
import org.slf4j.helpers.FormattingTuple;
import org.slf4j.helpers.MessageFormatter;

public class OutputEventListenerBackedLogger implements Logger {

    private final String name;
    private final OutputEventListenerBackedLoggerContext context;
    private final Clock clock;

    public OutputEventListenerBackedLogger(String name, OutputEventListenerBackedLoggerContext context, Clock clock) {
        this.name = name;
        this.context = context;
        this.clock = clock;
    }

    public String getName() {
        return name;
    }

    private boolean isLevelAtMost(LogLevel levelLimit) {
        return levelLimit.compareTo(context.getLevel()) >= 0;
    }

    public boolean isTraceEnabled() {
        return false;
    }

    public boolean isTraceEnabled(Marker marker) {
        return isTraceEnabled();
    }

    public boolean isDebugEnabled() {
        return isLevelAtMost(LogLevel.DEBUG);
    }

    public boolean isDebugEnabled(Marker marker) {
        return isDebugEnabled();
    }

    public boolean isInfoEnabled() {
        return isLevelAtMost(LogLevel.INFO);
    }

    public boolean isInfoEnabled(Marker marker) {
        return isLevelAtMost(toLogLevel(marker));
    }

    public boolean isWarnEnabled() {
        return isLevelAtMost(LogLevel.WARN);
    }

    public boolean isWarnEnabled(Marker marker) {
        return isWarnEnabled();
    }

    public boolean isErrorEnabled() {
        return isLevelAtMost(LogLevel.ERROR);
    }

    public boolean isErrorEnabled(Marker marker) {
        return isErrorEnabled();
    }

    @Override
    public boolean isLifecycleEnabled() {
        return isLevelAtMost(LogLevel.LIFECYCLE);
    }

    @Override
    public boolean isQuietEnabled() {
        return isLevelAtMost(LogLevel.QUIET);
    }

    public void trace(String msg) {
    }

    public void trace(String format, Object arg) {
    }

    public void trace(String format, Object arg1, Object arg2) {
    }

    public void trace(String format, Object... arguments) {
    }

    public void trace(String msg, Throwable t) {
    }

    public void trace(Marker marker, String msg) {
    }

    public void trace(Marker marker, String format, Object arg) {
    }

    public void trace(Marker marker, String format, Object arg1, Object arg2) {
    }

    public void trace(Marker marker, String format, Object... argArray) {
    }

    public void trace(Marker marker, String msg, Throwable t) {
    }

    private void log(LogLevel logLevel, Throwable throwable, String message) {
        OperationIdentifier buildOperationId = CurrentBuildOperationRef.instance().getId();
        LogEvent logEvent = new LogEvent(clock.getCurrentTime(), name, logLevel, message, throwable, buildOperationId);
        OutputEventListener outputEventListener = context.getOutputEventListener();
        try {
            outputEventListener.onOutput(logEvent);
        } catch (Throwable e) {
            // fall back to standard out
            e.printStackTrace(System.out);
        }
    }

    private void log(LogLevel logLevel, Throwable throwable, String format, Object arg) {
        log(logLevel, throwable, format, new Object[]{arg});
    }

    private void log(LogLevel logLevel, Throwable throwable, String format, Object arg1, Object arg2) {
        log(logLevel, throwable, format, new Object[]{arg1, arg2});
    }

    private void log(LogLevel logLevel, Throwable throwable, String format, Object[] args) {
        FormattingTuple tuple = MessageFormatter.arrayFormat(format, args);
        Throwable loggedThrowable = throwable == null ? tuple.getThrowable() : throwable;

        log(logLevel, loggedThrowable, tuple.getMessage());
    }

    public void debug(String message) {
        if (isDebugEnabled()) {
            log(LogLevel.DEBUG, null, message);
        }
    }

    public void debug(String format, Object arg) {
        if (isDebugEnabled()) {
            log(LogLevel.DEBUG, null, format, arg);
        }
    }

    public void debug(String format, Object arg1, Object arg2) {
        if (isDebugEnabled()) {
            log(LogLevel.DEBUG, null, format, arg1, arg2);
        }
    }

    public void debug(String format, Object... arguments) {
        if (isDebugEnabled()) {
            log(LogLevel.DEBUG, null, format, arguments);
        }
    }

    public void debug(String msg, Throwable t) {
        if (isDebugEnabled()) {
            log(LogLevel.DEBUG, t, msg);
        }
    }

    public void debug(Marker marker, String msg) {
        if (isDebugEnabled(marker)) {
            log(LogLevel.DEBUG, null, msg);
        }
    }

    public void debug(Marker marker, String format, Object arg) {
        if (isDebugEnabled(marker)) {
            log(LogLevel.DEBUG, null, format, arg);
        }
    }

    public void debug(Marker marker, String format, Object arg1, Object arg2) {
        if (isDebugEnabled(marker)) {
            log(LogLevel.DEBUG, null, format, arg1, arg2);
        }
    }

    public void debug(Marker marker, String format, Object... argArray) {
        if (isDebugEnabled(marker)) {
            log(LogLevel.DEBUG, null, format, argArray);
        }
    }

    public void debug(Marker marker, String msg, Throwable t) {
        if (isDebugEnabled(marker)) {
            log(LogLevel.DEBUG, t, msg);
        }
    }

    public void info(String message) {
        if (isInfoEnabled()) {
            log(LogLevel.INFO, null, message);
        }
    }

    public void info(String format, Object arg) {
        if (isInfoEnabled()) {
            log(LogLevel.INFO, null, format, arg);
        }
    }

    public void info(String format, Object arg1, Object arg2) {
        if (isInfoEnabled()) {
            log(LogLevel.INFO, null, format, arg1, arg2);
        }
    }

    public void info(String format, Object... arguments) {
        if (isInfoEnabled()) {
            log(LogLevel.INFO, null, format, arguments);
        }
    }

    @Override
    public void lifecycle(String message) {
        if (isLifecycleEnabled()) {
            log(LogLevel.LIFECYCLE, null, message);
        }
    }

    @Override
    public void lifecycle(String message, Object... objects) {
        if (isLifecycleEnabled()) {
            log(LogLevel.LIFECYCLE, null, message, objects);
        }
    }

    @Override
    public void lifecycle(String message, Throwable throwable) {
        if (isLifecycleEnabled()) {
            log(LogLevel.LIFECYCLE, throwable, message);
        }
    }


    @Override
    public void quiet(String message) {
        if (isQuietEnabled()) {
            log(LogLevel.QUIET, null, message);
        }
    }

    @Override
    public void quiet(String message, Object... objects) {
        if (isQuietEnabled()) {
            log(LogLevel.QUIET, null, message, objects);
        }
    }

    @Override
    public void quiet(String message, Throwable throwable) {
        if (isQuietEnabled()) {
            log(LogLevel.QUIET, throwable, message);
        }
    }

    @Override
    public boolean isEnabled(LogLevel level) {
        return isLevelAtMost(level);
    }

    @Override
    public void log(LogLevel level, String message) {
        if (isEnabled(level)) {
            log(level, null, message);
        }
    }

    @Override
    public void log(LogLevel level, String message, Object... objects) {
        if (isEnabled(level)) {
            log(level, null, message, objects);
        }
    }

    @Override
    public void log(LogLevel level, String message, Throwable throwable) {
        if (isEnabled(level)) {
            log(level, throwable, message);
        }
    }

    public void info(String msg, Throwable t) {
        if (isInfoEnabled()) {
            log(LogLevel.INFO, t, msg);
        }
    }

    private LogLevel toLogLevel(Marker marker) {
        if (marker == null) {
            return LogLevel.INFO;
        }
        if (marker == Logging.LIFECYCLE) {
            return LogLevel.LIFECYCLE;
        }
        if (marker == Logging.QUIET) {
            return LogLevel.QUIET;
        }
        return LogLevel.INFO;
    }

    public void info(Marker marker, String msg) {
        if (isInfoEnabled(marker)) {
            log(toLogLevel(marker), null, msg);
        }
    }

    public void info(Marker marker, String format, Object arg) {
        if (isInfoEnabled(marker)) {
            log(toLogLevel(marker), null, format, arg);
        }
    }

    public void info(Marker marker, String format, Object arg1, Object arg2) {
        if (isInfoEnabled(marker)) {
            log(toLogLevel(marker), null, format, arg1, arg2);
        }
    }

    public void info(Marker marker, String format, Object... argArray) {
        if (isInfoEnabled(marker)) {
            log(toLogLevel(marker), null, format, argArray);
        }
    }

    public void info(Marker marker, String msg, Throwable t) {
        if (isInfoEnabled(marker)) {
            log(toLogLevel(marker), t, msg);
        }
    }

    public void warn(String message) {
        if (isWarnEnabled()) {
            log(LogLevel.WARN, null, message);
        }
    }

    public void warn(String format, Object arg) {
        if (isWarnEnabled()) {
            log(LogLevel.WARN, null, format, arg);
        }
    }

    public void warn(String format, Object arg1, Object arg2) {
        if (isWarnEnabled()) {
            log(LogLevel.WARN, null, format, arg1, arg2);
        }
    }

    public void warn(String format, Object... arguments) {
        if (isWarnEnabled()) {
            log(LogLevel.WARN, null, format, arguments);
        }
    }

    public void warn(String msg, Throwable t) {
        if (isWarnEnabled()) {
            log(LogLevel.WARN, t, msg);
        }
    }

    public void warn(Marker marker, String msg) {
        if (isWarnEnabled(marker)) {
            log(LogLevel.WARN, null, msg);
        }
    }

    public void warn(Marker marker, String format, Object arg) {
        if (isWarnEnabled(marker)) {
            log(LogLevel.WARN, null, format, arg);
        }
    }

    public void warn(Marker marker, String format, Object arg1, Object arg2) {
        if (isWarnEnabled(marker)) {
            log(LogLevel.WARN, null, format, arg1, arg2);
        }
    }

    public void warn(Marker marker, String format, Object... argArray) {
        if (isWarnEnabled(marker)) {
            log(LogLevel.WARN, null, format, argArray);
        }
    }

    public void warn(Marker marker, String msg, Throwable t) {
        if (isWarnEnabled(marker)) {
            log(LogLevel.WARN, t, msg);
        }
    }

    public void error(String message) {
        if (isErrorEnabled()) {
            log(LogLevel.ERROR, null, message);
        }
    }

    public void error(String format, Object arg) {
        if (isErrorEnabled()) {
            log(LogLevel.ERROR, null, format, arg);
        }
    }

    public void error(String format, Object arg1, Object arg2) {
        if (isErrorEnabled()) {
            log(LogLevel.ERROR, null, format, arg1, arg2);
        }
    }

    public void error(String format, Object... arguments) {
        if (isErrorEnabled()) {
            log(LogLevel.ERROR, null, format, arguments);
        }
    }

    public void error(String msg, Throwable t) {
        if (isErrorEnabled()) {
            log(LogLevel.ERROR, t, msg);
        }
    }

    public void error(Marker marker, String msg) {
        if (isErrorEnabled(marker)) {
            log(LogLevel.ERROR, null, msg);
        }
    }

    public void error(Marker marker, String format, Object arg) {
        if (isErrorEnabled(marker)) {
            log(LogLevel.ERROR, null, format, arg);
        }
    }

    public void error(Marker marker, String format, Object arg1, Object arg2) {
        if (isErrorEnabled(marker)) {
            log(LogLevel.ERROR, null, format, arg1, arg2);
        }
    }

    public void error(Marker marker, String format, Object... argArray) {
        if (isErrorEnabled(marker)) {
            log(LogLevel.ERROR, null, format, argArray);
        }
    }

    public void error(Marker marker, String msg, Throwable t) {
        if (isErrorEnabled(marker)) {
            log(LogLevel.ERROR, t, msg);
        }
    }
}
