//! Where vcs keeps things on this machine.

use std::path::PathBuf;

/// VCS_HOME, else the platform's data folder (~/.local/share/vcs on Linux,
/// ~/Library/Application Support/vcs on macOS, %LOCALAPPDATA%\vcs on Windows).
pub fn home() -> PathBuf {
    if let Some(dir) = std::env::var_os("VCS_HOME") {
        return PathBuf::from(dir);
    }
    if cfg!(windows)
        && let Some(local) = std::env::var_os("LOCALAPPDATA").filter(|d| !d.is_empty())
    {
        return PathBuf::from(local).join("vcs");
    }
    let user = crate::sys::user_home().unwrap_or_else(|| ".".into());
    if cfg!(target_os = "macos") {
        return user.join("Library/Application Support/vcs");
    }
    match std::env::var_os("XDG_DATA_HOME") {
        Some(d) if !d.is_empty() => PathBuf::from(d).join("vcs"),
        _ => user.join(".local/share/vcs"),
    }
}

pub fn objects() -> PathBuf {
    home().join("objects")
}

/// Sign-in tokens, readable only by the user.
pub fn credentials() -> PathBuf {
    home().join("credentials.json")
}