use std::fs;
use std::path::Path;
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 _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 = if Path::new(&format!("{}{}", "/home/g1n/public_spartan", _path).to_string()).exists() {
        "2 text/gemini"
    } else {
        "4 Not found"
    };
     
    //let filename = "index.gmi";
    /*
    let _contents = "";
    if _filename != "" {
        let _contents = fs::read_to_string(_filename).unwrap();
    } else { */
    let mut _contents = "".to_string();
    let full_path = format!("{}{}", "/home/g1n/public_spartan", _path);
    let mut exists = Path::new(&format!("{}{}", "/home/g1n/public_spartan", _path).to_string()).exists();
    if exists {
        if Path::new(&full_path).is_file(){
            _contents = fs::read_to_string(format!("{}{}", "/home/g1n/public_spartan", _path)).unwrap();
        } else {
            exists = Path::new(&format!("{}{}/index.gmi", "/home/g1n/public_spartan", _path).to_string()).exists();
            if exists { 
                _contents = fs::read_to_string(format!("{}{}index.gmi", "/home/g1n/public_spartan", _path)).unwrap();
            } else {
                _contents = format!("=> ..\n");
                let path_to_folder = full_path.clone();
                let files = fs::read_dir(path_to_folder).unwrap();
                for file in files {
                    let path_to_folder = full_path.clone();
                    let path = file.unwrap().path();
                    let file = path.strip_prefix(path_to_folder);
                    let file = file.unwrap().display();
                    if path.is_dir() {
                        _contents += &format!("=> {}/\n", file).to_string(); 
                    } else {
                        _contents += &format!("=> {}\n", file).to_string();
                    }
                }
            }
        }
    }
    
    let response = format!(
        "{}\r\n {}",
        status_line,
        _contents
    );

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