package http

import (
	"fmt"
	"gemini-grc/logging"
	_ "gemini-grc/logging"
	"net/http"
	"time"
)

func CreateServer(listenAddr string) *http.Server {
	mux := http.NewServeMux()
	mux.HandleFunc("GET /ping", wrapForError(getPing))

	server := &http.Server{
		Addr:              listenAddr,
		Handler:           mux,
		ReadHeaderTimeout: 10 * time.Second,
	}

	go func() {
		// Start the server. Blocking call.
		logging.LogInfo("HTTP server listening on %s", listenAddr)
		if err := server.ListenAndServe(); err != nil {
			panic(fmt.Sprintf("Server failed to start: %s", err))
		}
	}()
	return server
}

func wrapForError(f func(http.ResponseWriter, *http.Request) error) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		err := f(w, r)
		if err != nil {
			code := http.StatusInternalServerError
			logging.LogWarn("Error while handling request: %d %s", code, err)
			http.Error(w, http.StatusText(code), code)
		}
	}
}

func getPing(w http.ResponseWriter, r *http.Request) error {
	method := r.Method
	url := r.URL.String()
	path := r.URL.Path
	response := fmt.Sprintf("Pong %s %s %s", method, url, path)
	_, err := w.Write([]byte(response))
	if err != nil {
		return fmt.Errorf("failed to write response: %w", err)
	}
	return nil
}