package handler

import (
	"errors"
	pb "go.unistack.org/unistack-org/pkgdash/proto/go_generate"
	"net/http"

	"golang.org/x/net/context"
)

const (
	internalErrorCode = "1"
	badRequestCode    = "2"
	notFoundErrorCode = "3"
)

func mapError(ctx context.Context, err error) (result *pb.Error, status int) {
	status = http.StatusBadRequest

	switch errors.Unwrap(err).(type) {
	case *UnmarshalError:
		result = &pb.Error{Code: badRequestCode, Title: "Bad request"}
	case *ParametersMissingError:
		result = &pb.Error{Code: badRequestCode, Title: "Required parameters are missing"}
	case *NotFoundError:
		result = &pb.Error{Code: notFoundErrorCode, Title: "Not found"}
		status = http.StatusNotFound
	default:
		status = http.StatusInternalServerError
		result = &pb.Error{Code: internalErrorCode, Title: "Internal error", Details: err.Error()}
	}

	return
}