//! User directories handling
use anyhow::{Result, anyhow};
use camino::Utf8PathBuf;
use directories::ProjectDirs;

use crate::constants::APP_NAME;

/// Returns the path to the user data directory.
///
/// Post condition: this function ensures the directory is already created when returning.
pub async fn data_directory() -> Result<Utf8PathBuf> {
    let user_directory = ProjectDirs::from("cl", "bstr", APP_NAME)
        .ok_or_else(|| anyhow!("failed to get ProjectDirs"))?
        .data_dir()
        .to_path_buf();
    let user_directory = Utf8PathBuf::try_from(user_directory)?;
    tokio::fs::create_dir_all(&user_directory).await?;
    Ok(user_directory)
}

/// Returns the path to the user data cache directory.
///
/// Post condition: this function ensures the directory is already created when returning.
pub async fn data_cache_directory() -> Result<Utf8PathBuf> {
    let user_directory = ProjectDirs::from("cl", "bstr", APP_NAME)
        .ok_or_else(|| anyhow!("failed to get ProjectDirs"))?
        .cache_dir()
        .to_path_buf();
    let user_directory = Utf8PathBuf::try_from(user_directory)?;
    let user_directory = user_directory.join("data");
    tokio::fs::create_dir_all(&user_directory).await?;
    Ok(user_directory)
}

/// Returns the path to the user data cache directory.
///
/// Post condition: this function ensures the directory is already created when returning.
pub async fn image_cache_directory() -> Result<Utf8PathBuf> {
    let user_directory = ProjectDirs::from("cl", "bstr", APP_NAME)
        .ok_or_else(|| anyhow!("failed to get ProjectDirs"))?
        .cache_dir()
        .to_path_buf();
    let user_directory = Utf8PathBuf::try_from(user_directory)?;
    let user_directory = user_directory.join("data");
    tokio::fs::create_dir_all(&user_directory).await?;
    Ok(user_directory)
}