package service

import (
	"fmt"

	"aws-sts-mock/pkg/sigv4"
	"aws-sts-mock/pkg/sts"
)

// STSService handles STS business logic
type STSService struct {
	// Add dependencies if needed (e.g., user store, role manager)
}

// NewSTSService creates a new STS service
func NewSTSService() *STSService {
	return &STSService{}
}

// GetCallerIdentity returns the caller's identity information
func (s *STSService) GetCallerIdentity(creds sigv4.AWSCredentials) (*sts.GetCallerIdentityResult, error) {
	return &sts.GetCallerIdentityResult{
		UserId:  creds.AccountID,
		Account: creds.AccountID,
		Arn:     fmt.Sprintf("arn:aws:iam::%s:root", creds.AccountID),
	}, nil
}

// ValidateAPIVersion checks if the API version is supported
func (s *STSService) ValidateAPIVersion(version string) error {
	if version != "2011-06-15" {
		return fmt.Errorf("invalid API version: %s", version)
	}
	return nil
}