use std::fs;
use std::io::prelude::*;
use std::net::TcpListener;
use std::net::TcpStream;

extern crate argparse;
use argparse::{ArgumentParser, StoreTrue, Store};


fn main() {
    let mut verbose = false;
    let mut host = "localhost".to_string();
    let mut port = 3000; // TODO: change to 300
    //let mut root_dir = format!("/home/{}/public_spartan/", "username");
    // Arguments
    {  
        let mut ap = ArgumentParser::new();
        ap.set_description("Experimental spartan server");
        ap.refer(&mut verbose)
            .add_option(&["-v", "--verbose"], StoreTrue,
            "Be verbose");
        ap.refer(&mut host)
            .add_option(&["--host"], Store,
            "Hostname");
        ap.refer(&mut port)
            .add_option(&["-p", "--port"], Store,
            "Port");
        /*ap.refer(&mut root_dir)
            .add_option(&["-d", "--root-dir"], Store,
            "Root directory");*/
        ap.parse_args_or_exit();
    }
    if verbose {
        println!("Work in progress");
    }
    let listener = TcpListener::bind(format!("{}:{}", host, port)).unwrap();

    for stream in listener.incoming() {
        let stream = stream.unwrap();
        handle_connection(stream);
    }
}

fn handle_connection(mut stream: TcpStream) {
    let mut buffer = [0; 1024];

    stream.read(&mut buffer).unwrap();
    println!("{}", String::from_utf8_lossy(&buffer[..]));

    /*
    let hostname = "localhost";
    let path = "/";
    let _post = "\r\n";
    
    
    let get = format!(
        "{} {} {} {}",
        hostname,
        path,
        _post.len(),
        _post
    );*/

    // let _echo = b"$hostname /echo 0\r\n"; // TODO: fix echo behaviour

    let request =  String::from_utf8_lossy(&buffer[..]);
    let parsed_request: Vec<&str> = request.split(' ').collect();

    let host = parsed_request[0];
    let _path = parsed_request[1];
    let _post_len = parsed_request[2];
    
    let mut _post = ""; // TODO: fix behaviour for post
    /*
    if _post_len.len() > 0 {
        let _post = parsed_request[3];
    } else {
        let _post = "";
    }*/

    let get = format!( "{} {} {}\r\n {}\r\n", host, _path, _post_len, _post); 
    let get_bytes = get.as_bytes();
   
    let (status_line, _filename) = if _path == "/" {
        ("2 text/gemini", format!(".{}index.gmi", _path))
    } else {
        ("4 Not found", format!(".{}error.gmi",  "/")) // TODO: fix Not Found behaviour
    };
     
    //let filename = "index.gmi";
    /*
    let _contents = "";
    if _filename != "" {
        let _contents = fs::read_to_string(_filename).unwrap();
    } else { */
    let _contents = fs::read_to_string(_filename).unwrap();
    let response = format!(
        "{}\r\n {}",
        status_line,
        _contents
    );

    stream.write(response.as_bytes()).unwrap();
    stream.flush().unwrap();
   
}