#[macro_use]
extern crate log;

use std::env;
use std::process::exit;

use percent_encoding::{percent_decode, percent_encode, DEFAULT_ENCODE_SET};

use hyper::Client;
use hyper::rt::{self, Future};

use mars::{GeneralBuilder, builder_arguments_from_string};

fn main() {

    beautylog::init(log::LevelFilter::Info).ok();

    let mut args = vec![];
    let mut iter = env::args().skip(1);

    let current_dir = {

        let mut current_dir = None;

        loop {

            match iter.next() {

                Some(ref x) if (x == "-p" || x == "--path") && current_dir.is_some() => {
                    error!("path is specified multiple times");
                    exit(1);
                },

                Some(ref x) if x == "-p" || x == "--path" => {
                    match iter.next() {
                        Some(v) => current_dir = Some(v.clone()),
                        None => {
                            error!("expecting a path after -p");
                            exit(1);
                        }
                    }
                },
                Some(ref x) => {
                    args.push(x.clone());
                },
                None => break current_dir,
            }
        }

    };

    let current_dir = current_dir.map(|x| {
        if ! x.starts_with("/") {
            let current_dir = match env::current_dir() {
                Err(e) => {
                    error!("couldn't find current directory: {}", e);
                    exit(1);
                },
                Ok(path) => {
                    let p = path.to_str();
                    p.unwrap().to_owned()
                },
            };
            format!("{}/{}", current_dir, x)
        } else {
            x
        }
    });

    let current_dir = current_dir.unwrap_or_else(|| match env::current_dir() {
        Err(e) => {
            error!("couldn't find current directory: {}", e);
            exit(1);
        },
        Ok(path) => {
            let p = path.to_str();
            p.unwrap().to_owned()
        },
    });

    let args = args.join("&");

    let url = if args.is_empty() {
        format!("http://localhost:1500{}", current_dir)
    } else {
        format!("http://localhost:1500{}?{}", current_dir, args)
    };

    let url = percent_encode(url.as_bytes(), DEFAULT_ENCODE_SET).to_string();
    let url = url.parse::<hyper::Uri>().unwrap();
    rt::run(fetch_url(url));

}

fn fetch_url(uri: hyper::Uri) -> impl Future<Item=(), Error=()> {
    let client = Client::new();
    client.get(uri.clone())
        .map(|_| ())
        // If there was an error, build in client
        .map_err(move |_| {
            warn!("{}", "server not listening, building in client...");
            let mut builder = GeneralBuilder::new();
            let uri = percent_decode(uri.path().as_bytes()).decode_utf8().unwrap();
            let (path, args) = builder_arguments_from_string(&*uri);
            let _ = builder.build(&path, &args);
        })
}