package provisioner

import (
	"context"
)

// Method indicates the action to action that we will perform, it's used as part
// of the context in the call to authorize. It defaults to Sing.
type Method int

// The key to save the Method in the context.
type methodKey struct{}

const (
	// SignMethod is the method used to sign X.509 certificates.
	SignMethod Method = iota
	// RevokeMethod is the method used to revoke X.509 certificates.
	RevokeMethod
	// SignSSHMethod is the method used to sign SSH certificates.
	SignSSHMethod
	// RenewSSHMethod is the method used to renew SSH certificates.
	RenewSSHMethod
	// RevokeSSHMethod is the method used to revoke SSH certificates.
	RevokeSSHMethod
	// RekeySSHMethod is the method used to rekey SSH certificates.
	RekeySSHMethod
)

// String returns a string representation of the context method.
func (m Method) String() string {
	switch m {
	case SignMethod:
		return "sign-method"
	case RevokeMethod:
		return "revoke-method"
	case SignSSHMethod:
		return "sign-ssh-method"
	case RenewSSHMethod:
		return "renew-ssh-method"
	case RevokeSSHMethod:
		return "revoke-ssh-method"
	case RekeySSHMethod:
		return "rekey-ssh-method"
	default:
		return "unknown"
	}
}

// NewContextWithMethod creates a new context from ctx and attaches method to
// it.
func NewContextWithMethod(ctx context.Context, method Method) context.Context {
	return context.WithValue(ctx, methodKey{}, method)
}

// MethodFromContext returns the Method saved in ctx. Returns Sign if the given
// context has no Method associated with it.
func MethodFromContext(ctx context.Context) Method {
	m, _ := ctx.Value(methodKey{}).(Method)
	return m
}