use std::fs::File;
use std::path::Path;

use reqwest::Client;
use reqwest::header::ETAG;

use smush::decode;

fn main() -> Result<(), std::io::Error> {
    let client = Client::new();

    let args: Vec<_> = std::env::args().collect();
    if args.len() < 2 {
        println!("Please enter a package name...");
    }

    let split = args[1].as_str().split("::");
    let vec: Vec<&str> = split.collect();
    
    println!("Downloading {}", vec[0]);

    if !Path::new(format!("/usr/pack/repo/{}", vec[1]).as_str()).exists() {
        println!("Path /usr/pack/repo/{} does not exist. Please setup your environment.", vec[1]);
        std::process::exit(1);
    }

    print!("Making request...");
    let mut resp = client.get(vec[0])
        .send().expect("Failed to make request");

    if resp.status().is_success() {
        println!("OK");
        if let Some(etag) = resp.headers().get(ETAG) {
            std::fs::write("etag", etag.as_bytes()).expect("Failed to write ETAG...");
        }

        let mut file = match File::create(format!("/usr/pack/{}/tarballs/bash.pkg.tar.xz", vec[1])) {
            Ok(res) => res,
            Err(_) => {
                println!("Failed to create file...did you setup arch? Do you have permission to create files?");
                std::process::exit(1);
            }
        };

        resp.copy_to(&mut file).expect("failed to write file");
    } else {
        println!("FAIL!");
        std::process::exit(1);
    }

    let archive = File::open(format!("/usr/pack/repo/{}/tarballs/bash.pkg.tar.xz")).expect("Failed to open tar...");
    let mut tar = Vec::new();
    archive.read_to_end(&mut tar).expect("Failed to read tar...");

    Ok(())
}