use clap::Parser;
use gpapi::utils::base64;
use log::{info, LevelFilter};

use crate::app::App;

const VERSION: &str = concat!(env!("CARGO_PKG_VERSION"), " (", compile_time::date_str!(), ")");
const GP_API_KEY: &[u8; 32] = &[0; 32];

#[derive(Parser)]
#[command(version = VERSION)]
struct Cli {
  #[arg(long, help = "Read the API key from stdin")]
  api_key_on_stdin: bool,

  #[arg(long, default_value = env!("CARGO_PKG_VERSION"), help = "The version of the GUI")]
  gui_version: String,
}

impl Cli {
  fn run(&self) -> anyhow::Result<()> {
    let api_key = self.read_api_key()?;
    let app = App::new(api_key, &self.gui_version);

    app.run()
  }

  fn read_api_key(&self) -> anyhow::Result<Vec<u8>> {
    if self.api_key_on_stdin {
      let mut api_key = String::new();
      std::io::stdin().read_line(&mut api_key)?;

      let api_key = base64::decode_to_vec(api_key.trim())?;

      Ok(api_key)
    } else {
      Ok(GP_API_KEY.to_vec())
    }
  }
}

fn init_logger() {
  env_logger::builder().filter_level(LevelFilter::Info).init();
}

pub fn run() {
  let cli = Cli::parse();

  init_logger();
  info!("gpgui-helper started: {}", VERSION);

  if let Err(e) = cli.run() {
    eprintln!("{}", e);
    std::process::exit(1);
  }
}