#![allow(non_snake_case)]
use std::net::{TcpListener, TcpStream};
use std::io::{BufReader, prelude::*};
use std::fs;

fn main() -> std::io::Result<()> {
    let TCPlistener = TcpListener::bind("127.0.0.1:8080").unwrap();
    for Stream in TCPlistener.incoming() {
		ServePage(Stream?);
	}
	Ok(())
}

fn ServePage(mut Stream: TcpStream) {
	// Identifying information.
	let Buffer = BufReader::new(&Stream);
	let HTTPrequest: Vec<_> = Buffer.lines().map(|result| result.unwrap()).take_while(|line| !line.is_empty()).collect();
	println!("{HTTPrequest:#?}");
	
	// Response.
	#[allow(unused_assignments)]
	let mut Status : &str = "";
	#[allow(unused_assignments)]
	let mut Contents : String = "".to_string();
	
	if HTTPrequest[0] == "GET / HTTP/1.1" {
		Status = "HTTP/1.1 200 OK";
		Contents = fs::read_to_string("src/index.html").unwrap();
	} else {
		Status = "HTTP/1.1 404 Not Found";
		Contents = fs::read_to_string("src/404.html").unwrap();
	}
	let Length = Contents.len();
	let Response : String = format!("{Status}\r\nContent-Length: {Length}\r\n\r\n{Contents}");
	
	Stream.write_all(Response.as_bytes()).unwrap();
}