package core

import (
	"errors"
	"net/http"
)

// ServiceNameHTTPServer is a name for HTTP server service.
const ServiceNameHTTPServer = "core/http_server"

// ErrHTTPServerIsInvalid appears when HTTP server service implementation is invalid.
var ErrHTTPServerIsInvalid = errors.New("HTTP server service implementation is invalid")

// HTTPServer is an interface for HTTP server service.
type HTTPServer interface {
	// RegisterHandler registers HTTP handler.
	RegisterHandler(method, path string, handler http.HandlerFunc)
	// RegisterMiddleware registers HTTP server middlewares.
	RegisterMiddleware(middleware HTTPMiddlewareFunc)
}

// HTTPMiddlewareFunc is a function that acts as middleware for HTTP requests.
type HTTPMiddlewareFunc func(fn http.HandlerFunc) http.HandlerFunc