use std::{env, io::{Cursor, Seek}, path::PathBuf};
use flate2::read::GzDecoder;
use tar::Archive;

use crate::{ftp, java, system_dirs::get_local_data_directory};


pub fn check_prism() -> bool {
    let path = get_local_data_directory().join("prism");
    path.exists()
}

pub fn install_prism() -> Result<(), Box<dyn std::error::Error>>{
    if check_prism() {
        return Ok(());
    }
    java::install_java(21);
    let path = PathBuf::new().join("prism").join(format!("prism-{}",if env::consts::OS == "windows" {"win.zip"} else {"lin.tar.gz"}));
    let size = ftp::ftp_get_size(path.clone())?;
    let mut buff = Cursor::new(vec![]);
    let mut total = 0;
    ftp::ftp_retr(path, &mut buff, |data| { 
        total += data;
        println!("Downloading Prism: {}MB / {}MB", total/(1024*1024), size/(1024*1024));
    }).unwrap();
    std::fs::create_dir_all(get_local_data_directory().join("prism"))?;
    buff.rewind()?;
    if env::consts::OS != "windows" {
        let tar = GzDecoder::new(buff);
        let mut archive = Archive::new(tar);
        if !archive.unpack(get_local_data_directory().join("prism")).is_ok() {
            std::fs::remove_dir_all(get_local_data_directory().join("prism"));
        }
    } else {
        if !zip_extract::extract(buff, get_local_data_directory().join("prism").as_path(), true).is_ok() {
            std::fs::remove_dir_all(get_local_data_directory().join("prism"));
        }
    }
    
    let buff = Cursor::new(vec![]);
    ftp::ftp_retr(PathBuf, writer, callback)


    Ok(())
}