// +build !windows

package server

import (
	"net"
	"net/http"
	"os"

	"github.com/andig/evcc/core"
)

// SocketPath is the unix domain socket path
const SocketPath = "/tmp/evcc"

// remoteIfExists deletes file if it exists or fails
func remoteIfExists(file string) {
	_, err := os.Stat(file)
	if err == nil {
		err = os.Remove(file)
	}

	if err != nil && !os.IsNotExist(err) {
		log.FATAL.Fatal(err)
	}
}

// HealthListener attaches listener to unix domain socket and runs listener
func HealthListener(site core.SiteAPI) {
	remoteIfExists(SocketPath)

	l, err := net.Listen("unix", SocketPath)
	if err != nil {
		log.FATAL.Fatal(err)
	}
	defer l.Close()

	mux := http.NewServeMux()
	httpd := http.Server{Handler: mux}
	mux.HandleFunc("/health", HealthHandler(site))

	_ = httpd.Serve(l)
}