package auth

import "net/http"

// MockAuthenticator is a mock implementation of the authenticator.
type MockAuthenticator struct{}

// A compile-time constraint to ensure MockAuthenticator implements
// Authenticator.
var _ Authenticator = (*MockAuthenticator)(nil)

// NewMockAuthenticator returns a new MockAuthenticator instance.
func NewMockAuthenticator() *MockAuthenticator {
	return &MockAuthenticator{}
}

// Accept returns whether or not the header successfully authenticates the user
// to a given backend service.
func (a MockAuthenticator) Accept(header *http.Header, _ string) bool {
	if header.Get("Authorization") != "" {
		return true
	}
	if header.Get("Grpc-Metadata-macaroon") != "" {
		return true
	}
	if header.Get("Macaroon") != "" {
		return true
	}
	return false
}

// FreshChallengeHeader returns a header containing a challenge for the user to
// complete.
func (a MockAuthenticator) FreshChallengeHeader(r *http.Request,
	_ string, _ int64) (http.Header, error) {

	header := r.Header
	header.Set(
		"WWW-Authenticate", "LSAT macaroon=\"AGIAJEemVQUTEyNCR0exk7ek9"+
			"0Cg==\", invoice=\"lnbc1500n1pw5kjhmpp5fu6xhthlt2vucm"+
			"zkx6c7wtlh2r625r30cyjsfqhu8rsx4xpz5lwqdpa2fjkzep6yptk"+
			"sct5yp5hxgrrv96hx6twvusycn3qv9jx7ur5d9hkugr5dusx6cqzp"+
			"gxqr23s79ruapxc4j5uskt4htly2salw4drq979d7rcela9wz02el"+
			"hypmdzmzlnxuknpgfyfm86pntt8vvkvffma5qc9n50h4mvqhngadq"+
			"y3ngqjcym5a\"")
	return header, nil
}