// +build !change

package kvapi

import (
	"fmt"

	"github.com/gofrs/uuid"
)

var (
	_ error = (*ApiError)(nil)
	_ error = (*ConflictError)(nil)
	_ error = (*AuthError)(nil)
	_ error = (*NotFoundError)(nil)
)

type (
	ApiError struct {
		Method string

		Err error
	}

	ConflictError struct {
		ProvidedVersion, ExpectedVersion uuid.UUID
	}

	AuthError struct {
		Msg string
	}

	NotFoundError struct {
		Key string
	}
)

func (a *ApiError) Error() string {
	return fmt.Sprintf("api: %q error: %v", a.Method, a.Err)
}

func (a *ApiError) Unwrap() error {
	return a.Err
}

func (a *ConflictError) Error() string {
	return fmt.Sprintf("api: conflict: expected_version=%d, provided_version=%d", a.ExpectedVersion, a.ProvidedVersion)
}

func (a *AuthError) Error() string {
	return fmt.Sprintf("api: auth: %s", a.Msg)
}

func (a *NotFoundError) Error() string {
	return fmt.Sprintf("api: key %q is not found", a.Key)
}