package logger

import (
	"os"

	"github.com/sirupsen/logrus"
)

func NewLogger(config *Config) (*logrus.Logger, error) {
	logger := logrus.New()

	// Set output
	logger.SetOutput(os.Stdout)

	// Validate and set formatter
	switch config.Format {
	case "json":
		logger.SetFormatter(&logrus.JSONFormatter{})
	case "text":
		logger.SetFormatter(&logrus.TextFormatter{
			FullTimestamp: true,
		})
	case "":
		// Default to text formatter
		logger.SetFormatter(&logrus.TextFormatter{
			FullTimestamp: true,
		})
	default:
		return nil, NewConfigError(
			"configure",
			"format",
			config.Format,
			ErrInvalidFormat,
			"supported formats are 'json' and 'text'",
		)
	}

	// Validate and set level
	if config.Level == "" {
		// Default to info level
		logger.SetLevel(logrus.InfoLevel)
	} else {
		level, err := logrus.ParseLevel(config.Level)
		if err != nil {
			return nil, NewConfigError(
				"configure",
				"level",
				config.Level,
				ErrInvalidLevel,
				err.Error(),
			)
		}
		logger.SetLevel(level)
	}

	return logger, nil
}