mod constants;
mod errors;

mod config;
mod minecraft;
mod platform;
mod util;

use clap::Parser;
use config::Config;
use dotenvy::dotenv;
use errors::McError;
use log::{debug, info};

use crate::minecraft::{
    downloads::download_all, extraction::extract_natives, launcher::launch,
    manifests,
};

#[derive(Parser, Debug)]
#[command(author, about, disable_version_flag = true)]
struct Cli {
    #[arg(long)]
    version: Option<String>,

    #[arg(long)]
    username: Option<String>,

    #[arg(long, num_args(0..), allow_hyphen_values = true)]
    jvm_args: Vec<String>,
}

#[tokio::main]
async fn main() -> Result<(), McError> {
    dotenv().ok();
    env_logger::init();

    let cli = Cli::parse();
    let mut config = Config::load()?;

    if let Some(v) = cli.version {
        config.version = v;
    }

    if let Some(u) = cli.username {
        config.username = u;
    }
    if !cli.jvm_args.is_empty() {
        config.jvm_args = cli.jvm_args;
    }

    info!("Final config after CLI overrides: {:?}", config);

    platform::paths::ensure_dirs(&config)?;
    info!("Using Minecraft version {}", config.version);

    let version = manifests::load_version(&config).await?;
    info!("Loaded version manifest for: {}", version.id);
    debug!("Main class: {}", version.main_class);

    download_all(&config, &version).await?;
    extract_natives(&config, &version)?;
    launch(&config, &version)?;

    Ok(())
}