// Chapter 32 example: replying with HTML from a string.
// Run with: go run exercises/32/02-html-page.go

package main

import (
	"fmt"
	"net/http"
)

const homePage = `<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Home</title>
</head>
<body>
<h1>Welcome</h1>
<p>This page came from a Go string.</p>
<p><a href="/about">About this server</a></p>
</body>
</html>
`

const aboutPage = `<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>About</title>
</head>
<body>
<h1>About</h1>
<p>It has two pages.</p>
<p><a href="/">Back to the home page</a></p>
</body>
</html>
`

func handleHome(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "text/html; charset=utf-8")
	fmt.Fprint(w, homePage)
}

func handleAbout(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "text/html; charset=utf-8")
	fmt.Fprint(w, aboutPage)
}

func main() {
	http.HandleFunc("GET /{$}", handleHome)
	http.HandleFunc("GET /about", handleAbout)

	fmt.Println("Server running at http://localhost:8080")
	fmt.Println("Press Ctrl+C to stop it.")

	err := http.ListenAndServe("localhost:8080", nil)
	if err != nil {
		fmt.Println("Server stopped:", err)
	}
}