package main

import (
	"fmt"
	"html/template"
	"log"
	"net/http"
	"os/exec"
	"syscall"
)

var serverCmd *exec.Cmd

func startServer(w http.ResponseWriter, r *http.Request) {
	if serverCmd != nil {
		fmt.Fprintln(w, "Server is already running.")
		return
	}

	serverCmd = exec.Command("/opt/hl2dm/Steam/hl2dm/srcds_run", "-game", "hl2mp", "+map", "dm_lockdown", "+maxplayers", "16")
	serverCmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true} // Allow stopping the entire process group

	if err := serverCmd.Start(); err != nil {
		log.Println("Error starting server:", err)
		http.Error(w, "Failed to start server", http.StatusInternalServerError)
		return
	}

	fmt.Fprintln(w, "Server started with PID", serverCmd.Process.Pid)
}

func stopServer(w http.ResponseWriter, r *http.Request) {
	if serverCmd == nil {
		fmt.Fprintln(w, "Server is not running.")
		return
	}

	if err := syscall.Kill(-serverCmd.Process.Pid, syscall.SIGKILL); err != nil {
		log.Println("Error stopping server:", err)
		http.Error(w, "Failed to stop server", http.StatusInternalServerError)
		return
	}

	serverCmd = nil
	fmt.Fprintln(w, "Server stopped.")
}
func main() {
	http.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("./static"))))

	// Define routes
	http.HandleFunc("/", homeHandler)
	http.HandleFunc("/hl2", hl2Handler)
	http.HandleFunc("/quake", quakeHandler)
	http.HandleFunc("/start", startServer)
	http.HandleFunc("/stop", stopServer)
	// http.HandleFunc("/restart", restartServer)

	// Start the server
	fmt.Println("Server running on http://localhost:8080")
	log.Fatal(http.ListenAndServe(":8080", nil))
}

// Render the homepage
func homeHandler(w http.ResponseWriter, r *http.Request) {
	tmpl := template.Must(template.ParseFiles("templates/index.xhtml"))
	tmpl.Execute(w, nil)
}

// Render the Half-Life 2 page
func hl2Handler(w http.ResponseWriter, r *http.Request) {
	tmpl := template.Must(template.ParseFiles("templates/hl2.xhtml"))
	tmpl.Execute(w, nil)
}

// Render the Quake page
func quakeHandler(w http.ResponseWriter, r *http.Request) {
	tmpl := template.Must(template.ParseFiles("templates/quake.xhtml"))
	tmpl.Execute(w, nil)
}