package rerr

import (
	"net/http"

	"github.com/gofiber/fiber/v3"
)

// RepositoryError represents an error in the registry
type RepositoryError struct {
	Status  int    `json:"status"`
	Code    string `json:"code"`
	Message string `json:"message"`
}

func (e *RepositoryError) Error() string {
	return e.Message
}

// Error responses
var (
	ErrBlobUnknown = &RepositoryError{
		Status:  http.StatusNotFound,
		Code:    "BLOB_UNKNOWN",
		Message: "blob unknown to registry",
	}

	ErrDigestInvalid = &RepositoryError{
		Status:  http.StatusBadRequest,
		Code:    "DIGEST_INVALID",
		Message: "provided digest did not match uploaded content",
	}

	ErrDigestMismatch = &RepositoryError{
		Status:  http.StatusBadRequest,
		Code:    "DIGEST_MISMATCH",
		Message: "provided digest did not match uploaded content",
	}

	ErrManifestUnknown = &RepositoryError{
		Status:  http.StatusNotFound,
		Code:    "MANIFEST_UNKNOWN",
		Message: "manifest unknown",
	}

	ErrManifestInvalid = &RepositoryError{
		Status:  http.StatusBadRequest,
		Code:    "MANIFEST_INVALID",
		Message: "manifest invalid",
	}

	ErrNameUnknown = &RepositoryError{
		Status:  http.StatusNotFound,
		Code:    "NAME_UNKNOWN",
		Message: "repository name not known to registry",
	}

	ErrUnauthorized = &RepositoryError{
		Status:  http.StatusUnauthorized,
		Code:    "UNAUTHORIZED",
		Message: "authentication required",
	}

	ErrDenied = &RepositoryError{
		Status:  http.StatusForbidden,
		Code:    "DENIED",
		Message: "requested access to the resource is denied",
	}

	ErrUnsupported = &RepositoryError{
		Status:  http.StatusMethodNotAllowed,
		Code:    "UNSUPPORTED",
		Message: "The operation is unsupported",
	}

	ErrTooManyRequests = &RepositoryError{
		Status:  http.StatusTooManyRequests,
		Code:    "TOOMANYREQUESTS",
		Message: "too many requests",
	}
)

// ErrInternal creates an internal server error
func ErrInternal(err error) *RepositoryError {
	return &RepositoryError{
		Status:  http.StatusInternalServerError,
		Code:    "INTERNAL_SERVER_ERROR",
		Message: err.Error(),
	}
}

// Error sends a repository error response
func Error(c fiber.Ctx, err *RepositoryError) error {
	return c.Status(err.Status).JSON(fiber.Map{
		"errors": []fiber.Map{
			{
				"code":    err.Code,
				"message": err.Message,
			},
		},
	})
}