// Copyright (c) 2016 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package zap

import (
	
	
	
	
	

	
)

const (
	_stdLogDefaultDepth      = 1
	_loggerWriterDepth       = 2
	_programmerErrorTemplate = "You've found a bug in zap! Please file a bug at " +
		"https://github.com/uber-go/zap/issues/new and reference this error: %v"
)

var (
	_globalMu sync.RWMutex
	_globalL  = NewNop()
	_globalS  = _globalL.Sugar()
)

// L returns the global Logger, which can be reconfigured with ReplaceGlobals.
// It's safe for concurrent use.
func () *Logger {
	_globalMu.RLock()
	 := _globalL
	_globalMu.RUnlock()
	return 
}

// S returns the global SugaredLogger, which can be reconfigured with
// ReplaceGlobals. It's safe for concurrent use.
func () *SugaredLogger {
	_globalMu.RLock()
	 := _globalS
	_globalMu.RUnlock()
	return 
}

// ReplaceGlobals replaces the global Logger and SugaredLogger, and returns a
// function to restore the original values. It's safe for concurrent use.
func ( *Logger) func() {
	_globalMu.Lock()
	 := _globalL
	_globalL = 
	_globalS = .Sugar()
	_globalMu.Unlock()
	return func() { () }
}

// NewStdLog returns a *log.Logger which writes to the supplied zap Logger at
// InfoLevel. To redirect the standard library's package-global logging
// functions, use RedirectStdLog instead.
func ( *Logger) *log.Logger {
	 := .WithOptions(AddCallerSkip(_stdLogDefaultDepth + _loggerWriterDepth))
	 := .Info
	return log.New(&loggerWriter{}, "" /* prefix */, 0 /* flags */)
}

// NewStdLogAt returns *log.Logger which writes to supplied zap logger at
// required level.
func ( *Logger,  zapcore.Level) (*log.Logger, error) {
	 := .WithOptions(AddCallerSkip(_stdLogDefaultDepth + _loggerWriterDepth))
	,  := levelToFunc(, )
	if  != nil {
		return nil, 
	}
	return log.New(&loggerWriter{}, "" /* prefix */, 0 /* flags */), nil
}

// RedirectStdLog redirects output from the standard library's package-global
// logger to the supplied logger at InfoLevel. Since zap already handles caller
// annotations, timestamps, etc., it automatically disables the standard
// library's annotations and prefixing.
//
// It returns a function to restore the original prefix and flags and reset the
// standard library's output to os.Stderr.
func ( *Logger) func() {
	,  := redirectStdLogAt(, InfoLevel)
	if  != nil {
		// Can't get here, since passing InfoLevel to redirectStdLogAt always
		// works.
		panic(fmt.Sprintf(_programmerErrorTemplate, ))
	}
	return 
}

// RedirectStdLogAt redirects output from the standard library's package-global
// logger to the supplied logger at the specified level. Since zap already
// handles caller annotations, timestamps, etc., it automatically disables the
// standard library's annotations and prefixing.
//
// It returns a function to restore the original prefix and flags and reset the
// standard library's output to os.Stderr.
func ( *Logger,  zapcore.Level) (func(), error) {
	return redirectStdLogAt(, )
}

func ( *Logger,  zapcore.Level) (func(), error) {
	 := log.Flags()
	 := log.Prefix()
	log.SetFlags(0)
	log.SetPrefix("")
	 := .WithOptions(AddCallerSkip(_stdLogDefaultDepth + _loggerWriterDepth))
	,  := levelToFunc(, )
	if  != nil {
		return nil, 
	}
	log.SetOutput(&loggerWriter{})
	return func() {
		log.SetFlags()
		log.SetPrefix()
		log.SetOutput(os.Stderr)
	}, nil
}

func ( *Logger,  zapcore.Level) (func(string, ...Field), error) {
	switch  {
	case DebugLevel:
		return .Debug, nil
	case InfoLevel:
		return .Info, nil
	case WarnLevel:
		return .Warn, nil
	case ErrorLevel:
		return .Error, nil
	case DPanicLevel:
		return .DPanic, nil
	case PanicLevel:
		return .Panic, nil
	case FatalLevel:
		return .Fatal, nil
	}
	return nil, fmt.Errorf("unrecognized level: %q", )
}

type loggerWriter struct {
	logFunc func(msg string, fields ...Field)
}

func ( *loggerWriter) ( []byte) (int, error) {
	 = bytes.TrimSpace()
	.logFunc(string())
	return len(), nil
}