// Package greeter is a minimal example domain package.
// It demonstrates how to:
//   - define an interface (satisfied by manual fakes in tests)
//   - inject a component-scoped logger through the constructor
//
// Replace this package with your own domain logic.
package greeter

import (
	"fmt"

	"gitea.djmil.dev/go/template/pkg/logger"
	"gitea.djmil.dev/go/template/pkg/result"
)

// Service is the concrete implementation.
type Service struct {
	log *logger.Logger
}

// New creates a Greeter service with the provided logger.
func New(log *logger.Logger) *Service {
	return &Service{log: log.WithField("component", "greeter")}
}

// Greet returns a personalized greeting and logs the interaction.
func (s *Service) Greet(name string) result.Expect[string] {
	if name == "" {
		return result.Errf[string]("name must not be empty")
	}

	msg := fmt.Sprintf("Hello, %s!", name)

	s.log.WithField("name", name).Debug("greeting generated")

	return result.Ok(msg)
}