// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
// SPDX-License-Identifier: MIT


// Package logging provides the logging library used by Pion
package logging

import (
	
	
	
	
	
	
)

// Use this abstraction to ensure thread-safe access to the logger's io.Writer.
// (which could change at runtime).
type loggerWriter struct {
	sync.RWMutex
	output io.Writer
}

func ( *loggerWriter) ( io.Writer) {
	.Lock()
	defer .Unlock()
	.output = 
}

func ( *loggerWriter) ( []byte) (int, error) {
	.RLock()
	defer .RUnlock()

	return .output.Write()
}

// DefaultLeveledLogger encapsulates functionality for providing logging at.
// user-defined levels.
type DefaultLeveledLogger struct {
	level  LogLevel
	writer *loggerWriter
	trace  *log.Logger
	debug  *log.Logger
	info   *log.Logger
	warn   *log.Logger
	err    *log.Logger
}

// WithTraceLogger is a chainable configuration function which sets the
// Trace-level logger.
func ( *DefaultLeveledLogger) ( *log.Logger) *DefaultLeveledLogger {
	.trace = 

	return 
}

// WithDebugLogger is a chainable configuration function which sets the
// Debug-level logger.
func ( *DefaultLeveledLogger) ( *log.Logger) *DefaultLeveledLogger {
	.debug = 

	return 
}

// WithInfoLogger is a chainable configuration function which sets the
// Info-level logger.
func ( *DefaultLeveledLogger) ( *log.Logger) *DefaultLeveledLogger {
	.info = 

	return 
}

// WithWarnLogger is a chainable configuration function which sets the
// Warn-level logger.
func ( *DefaultLeveledLogger) ( *log.Logger) *DefaultLeveledLogger {
	.warn = 

	return 
}

// WithErrorLogger is a chainable configuration function which sets the
// Error-level logger.
func ( *DefaultLeveledLogger) ( *log.Logger) *DefaultLeveledLogger {
	.err = 

	return 
}

// WithOutput is a chainable configuration function which sets the logger's
// logging output to the supplied io.Writer.
func ( *DefaultLeveledLogger) ( io.Writer) *DefaultLeveledLogger {
	.writer.SetOutput()

	return 
}

func ( *DefaultLeveledLogger) ( *log.Logger,  LogLevel,  string,  ...interface{}) {
	if .level.Get() <  {
		return
	}

	 := 3 // this frame + wrapper func + caller
	 := fmt.Sprintf(, ...)
	if  := .Output(, );  != nil {
		fmt.Fprintf(os.Stderr, "Unable to log: %s", )
	}
}

// SetLevel sets the logger's logging level.
func ( *DefaultLeveledLogger) ( LogLevel) {
	.level.Set()
}

// Trace emits the preformatted message if the logger is at or below LogLevelTrace.
func ( *DefaultLeveledLogger) ( string) {
	.logf(.trace, LogLevelTrace, ) // nolint: govet
}

// Tracef formats and emits a message if the logger is at or below LogLevelTrace.
func ( *DefaultLeveledLogger) ( string,  ...interface{}) {
	.logf(.trace, LogLevelTrace, , ...)
}

// Debug emits the preformatted message if the logger is at or below LogLevelDebug.
func ( *DefaultLeveledLogger) ( string) {
	.logf(.debug, LogLevelDebug, ) // nolint: govet
}

// Debugf formats and emits a message if the logger is at or below LogLevelDebug.
func ( *DefaultLeveledLogger) ( string,  ...interface{}) {
	.logf(.debug, LogLevelDebug, , ...)
}

// Info emits the preformatted message if the logger is at or below LogLevelInfo.
func ( *DefaultLeveledLogger) ( string) {
	.logf(.info, LogLevelInfo, ) // nolint: govet
}

// Infof formats and emits a message if the logger is at or below LogLevelInfo.
func ( *DefaultLeveledLogger) ( string,  ...interface{}) {
	.logf(.info, LogLevelInfo, , ...)
}

// Warn emits the preformatted message if the logger is at or below LogLevelWarn.
func ( *DefaultLeveledLogger) ( string) {
	.logf(.warn, LogLevelWarn, ) // nolint: govet
}

// Warnf formats and emits a message if the logger is at or below LogLevelWarn.
func ( *DefaultLeveledLogger) ( string,  ...interface{}) {
	.logf(.warn, LogLevelWarn, , ...)
}

// Error emits the preformatted message if the logger is at or below LogLevelError.
func ( *DefaultLeveledLogger) ( string) {
	.logf(.err, LogLevelError, ) // nolint: govet
}

// Errorf formats and emits a message if the logger is at or below LogLevelError.
func ( *DefaultLeveledLogger) ( string,  ...interface{}) {
	.logf(.err, LogLevelError, , ...)
}

// NewDefaultLeveledLoggerForScope returns a configured LeveledLogger.
func ( string,  LogLevel,  io.Writer) *DefaultLeveledLogger {
	if  == nil {
		 = os.Stderr
	}
	 := &DefaultLeveledLogger{
		writer: &loggerWriter{output: },
		level:  ,
	}

	return .
		WithTraceLogger(log.New(.writer, fmt.Sprintf("%s TRACE: ", ), log.Lmicroseconds|log.Lshortfile)).
		WithDebugLogger(log.New(.writer, fmt.Sprintf("%s DEBUG: ", ), log.Lmicroseconds|log.Lshortfile)).
		WithInfoLogger(log.New(.writer, fmt.Sprintf("%s INFO: ", ), log.LstdFlags)).
		WithWarnLogger(log.New(.writer, fmt.Sprintf("%s WARNING: ", ), log.LstdFlags)).
		WithErrorLogger(log.New(.writer, fmt.Sprintf("%s ERROR: ", ), log.LstdFlags))
}

// DefaultLoggerFactory define levels by scopes and creates new DefaultLeveledLogger.
type DefaultLoggerFactory struct {
	Writer          io.Writer
	DefaultLogLevel LogLevel
	ScopeLevels     map[string]LogLevel
}

// NewDefaultLoggerFactory creates a new DefaultLoggerFactory.
func () *DefaultLoggerFactory {
	 := DefaultLoggerFactory{}
	.DefaultLogLevel = LogLevelError
	.ScopeLevels = make(map[string]LogLevel)
	.Writer = os.Stderr

	 := map[string]LogLevel{
		"DISABLE": LogLevelDisabled,
		"ERROR":   LogLevelError,
		"WARN":    LogLevelWarn,
		"INFO":    LogLevelInfo,
		"DEBUG":   LogLevelDebug,
		"TRACE":   LogLevelTrace,
	}

	for ,  := range  {
		 := os.Getenv(fmt.Sprintf("PION_LOG_%s", ))

		if  == "" {
			 = os.Getenv(fmt.Sprintf("PIONS_LOG_%s", ))
		}

		if  == "" {
			continue
		}

		if strings.ToLower() == "all" {
			if .DefaultLogLevel <  {
				.DefaultLogLevel = 
			}

			continue
		}

		 := strings.Split(strings.ToLower(), ",")
		for ,  := range  {
			.ScopeLevels[] = 
		}
	}

	return &
}

// NewLogger returns a configured LeveledLogger for the given, argsscope.
func ( *DefaultLoggerFactory) ( string) LeveledLogger {
	 := .DefaultLogLevel
	if .ScopeLevels != nil {
		,  := .ScopeLevels[]

		if  {
			 = 
		}
	}

	return NewDefaultLeveledLoggerForScope(, , .Writer)
}