use std::{fs::create_dir_all, path::PathBuf};

use crate::{config::Config, errors::McError};

/// ~/.local/share/dml/minecraft
pub fn minecraft_root(cfg: &Config) -> PathBuf {
    cfg.data_dir.join("minecraft")
}

pub fn assets_dir(cfg: &Config) -> PathBuf {
    minecraft_root(cfg).join("assets")
}

pub fn game_dir(cfg: &Config) -> PathBuf { minecraft_root(cfg) }
pub fn ensure_dirs(cfg: &Config) -> Result<(), McError> {
    let root = minecraft_root(cfg);
    create_dir_all(&root)?;
    create_dir_all(root.join("versions"))?;
    create_dir_all(root.join("libraries"))?;
    create_dir_all(assets_dir(cfg))?;
    create_dir_all(assets_dir(cfg).join("indexes"))?;
    create_dir_all(assets_dir(cfg).join("objects"))?;
    create_dir_all(root.join("saves"))?;

    Ok(())
}

pub fn version_dir(cfg: &Config, version: &str) -> PathBuf {
    minecraft_root(cfg).join("versions").join(version)
}

pub fn client_jar(cfg: &Config, version: &str) -> Result<PathBuf, McError> {
    Ok(version_dir(cfg, version).join(format!("{version}.jar")))
}

pub fn library_file(cfg: &Config, rel_path: &str) -> Result<PathBuf, McError> {
    Ok(minecraft_root(cfg)
        .join("libraries")
        .join(rel_path))
}

pub fn natives_dir(cfg: &Config, version: &str) -> PathBuf {
    version_dir(cfg, version).join("natives")
}