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(string, int64) (http.Header,
	error) {

	header := http.Header{
		"Content-Type": []string{"application/grpc"},
	}

	str := "macaroon=\"AGIAJEemVQUTEyNCR0exk7ek9" +
		"0Cg==\", invoice=\"lnbc1500n1pw5kjhmpp5fu6xhthlt2vucm" +
		"zkx6c7wtlh2r625r30cyjsfqhu8rsx4xpz5lwqdpa2fjkzep6yptk" +
		"sct5yp5hxgrrv96hx6twvusycn3qv9jx7ur5d9hkugr5dusx6cqzp" +
		"gxqr23s79ruapxc4j5uskt4htly2salw4drq979d7rcela9wz02el" +
		"hypmdzmzlnxuknpgfyfm86pntt8vvkvffma5qc9n50h4mvqhngadq" +
		"y3ngqjcym5a\""
	header.Set("WWW-Authenticate", lsatAuthScheme+" "+str)
	header.Add("WWW-Authenticate", l402AuthScheme+" "+str)

	return header, nil
}