use std::env;
use std::env::temp_dir;
use std::fs::{create_dir_all, remove_dir_all};
use std::io::Cursor;
use std::process::exit;

use uuid::Uuid;

use pkgfile::PKGFile;

use crate::args::{Args, Command};
use crate::prelude::run_bootstrap;

mod args;
mod prelude;

fn main() {
    let args = Args::from(env::args().collect::<Vec<String>>()[1..].to_owned());
    match args.command {
        Command::Strap => {
            if args.args.len() == 0 {
                println!("no path/uri");
                exit(0);
            }
            let uri = &args.args[0];
            println!("!! Got package: \"{}\"", uri);
            let re = r"[A-z]+://.+";
            let data = if regex::Regex::new(re).unwrap().is_match(uri) {
                println!("** detected uri.");
                reqwest::blocking::get(uri)
                    .expect("Could not request file.")
                    .bytes()
                    .expect("Could not turn file into bytes.")
                    .to_vec()
            } else {
                println!("** reading data...");
                if let Ok(d) = std::fs::read(uri) {
                    d
                } else {
                    println!("Could not read file!");
                    exit(1);
                }
            };

            println!("** parsing pkgfile...");
            let pkg = match PKGFile::try_from(data) {
                Ok(p) => p,
                Err(_) => {
                    println!("!! Could not interpret PKGFile...");
                    exit(1);
                }
            };

            let mani = prelude::mani_from_str(&pkg.manifest);

            println!("-- Package: {}", &mani.package.name);
            println!("-- Description: {}", &mani.package.description);
            println!("-- Version: {}", &mani.package.version);
            println!("-- Tags: {}", &mani.package.tags.join(", "));

            if !mani.valid() {
                println!("!!! Manifest is not valid.");
                exit(1);
            }

            let mut tmp_dir = temp_dir();
            tmp_dir.push(format!("{}", Uuid::new_v4()));
            create_dir_all(&tmp_dir).expect("Could not create tmp dir.");

            println!("** extracting pkgtar...");
            {
                let mut archive = tar::Archive::new(Cursor::new(pkg.data));
                archive
                    .unpack(format!("{}/contents", &tmp_dir.to_str().unwrap()))
                    .expect("Could not extract archive");
            }

            env::set_current_dir(format!("{}/contents", &tmp_dir.to_str().unwrap()))
                .expect("could not enter tmp dir");

            println!("** running bootstrap commands...");
            let res_bootstrap = run_bootstrap(mani);
            println!("** removing temporary directory...");
            remove_dir_all(&tmp_dir).expect(&*format!(
                "Could not remove tmp dir: {}",
                &tmp_dir.to_str().unwrap()
            ));
            exit(if res_bootstrap {
                println!("!! bootstrap success");
                0
            } else {
                1
            })
        }
        _ => {
            println!("Unsupported command, allowed commands: strap.");
            exit(1);
        }
    }
}