package gitea

import (
	"errors"
	"fmt"
)

var (
	ErrPermissionDenied = errors.New("permission denied")
	ErrNotFound         = errors.New("not found")
	ErrConflict         = errors.New("conflict")
	ErrValidation       = errors.New("validation failed")
	ErrUpstream         = errors.New("upstream gitea error")
)

// MapStatus returns nil for 2xx, otherwise a typed error wrapping the response body.
func MapStatus(status int, body []byte) error {
	if status >= 200 && status < 300 {
		return nil
	}
	switch {
	case status == 401, status == 403:
		return fmt.Errorf("%w: %s", ErrPermissionDenied, body)
	case status == 404:
		return fmt.Errorf("%w: %s", ErrNotFound, body)
	case status == 409:
		return fmt.Errorf("%w: %s", ErrConflict, body)
	case status == 422:
		return fmt.Errorf("%w: %s", ErrValidation, body)
	case status >= 500:
		return fmt.Errorf("%w (status %d)", ErrUpstream, status)
	}
	return fmt.Errorf("unexpected status %d: %s", status, body)
}