package logger_test

import (
	"time"

	"github.com/creativenoz/aurganize-v62/backend/pkg/logger"
	"github.com/rs/zerolog/log"
)

// Example_basicUsage demonstrates basic logger usage
func Example_basicUsage() {
	// Initialize logger
	logger.Init("development")

	// Log at different levels
	log.Debug().Msg("This is debug information")
	log.Info().Msg("This is informational")
	log.Warn().Msg("This is a warning")
	log.Error().Msg("This is an error")

	// Output depends on log level
}

// Example_structuredLogging demonstrates structured logging with fields
func Example_structuredLogging() {
	logger.Init("development")

	// Log with structured fields
	log.Info().
		Str("user_id", "12345").
		Str("action", "login").
		Bool("success", true).
		Dur("duration", 150*time.Millisecond).
		Msg("User login attempt")

	// JSON output:
	// {
	//   "level": "info",
	//   "user_id": "12345",
	//   "action": "login",
	//   "success": true,
	//   "duration": 150,
	//   "message": "User login attempt"
	// }
}

// Example_contextLogger demonstrates creating logger with context
func Example_contextLogger() {
	logger.Init("development")

	// Create logger with request context
	requestLogger := logger.WithContext(map[string]interface{}{
		"request_id": "req-abc-123",
		"user_id":    "user-456",
		"ip":         "192.168.1.1",
	})

	// All logs from this logger include context
	requestLogger.Info().Msg("Request started")
	requestLogger.Info().Msg("Processing payment")
	requestLogger.Info().Msg("Request completed")

	// All three logs include request_id, user_id, and ip
}

// Example_errorLogging demonstrates logging errors
func Example_errorLogging() {
	logger.Init("development")

	// Simulate an error
	err := someFunction()
	if err != nil {
		log.Error().
			Err(err). // Add error
			Str("user_id", "123").
			Str("operation", "database_query").
			Msg("Failed to fetch user")
	}
}

// Example_subLogger demonstrates module-specific loggers
func Example_subLogger() {
	logger.Init("development")

	// Create a sub-logger for authentication module
	authLogger := log.With().
		Str("module", "auth").
		Str("version", "v1").
		Logger()

	authLogger.Info().Msg("Auth module initialized")
	authLogger.Debug().Msg("Loading auth configuration")

	// Create a sub-logger for database module
	dbLogger := log.With().
		Str("module", "database").
		Logger()

	dbLogger.Info().Msg("Database connection established")

	// Now you can filter logs by module in production
}

// Helper function for example
func someFunction() error {
	return nil
}