use std::{fs, path::Path};

use log::debug;

macro_rules! regex {
    ($re:literal $(,)?) => {{
        static RE: once_cell::sync::OnceCell<regex::Regex> = once_cell::sync::OnceCell::new();
        RE.get_or_init(|| regex::Regex::new($re).unwrap())
    }};
}

pub mod baas;
pub mod contentdb;
pub mod download;
pub mod error;
pub mod game;
pub mod kvstore;
pub mod minemod;
pub mod world;

pub use baas::{Baas, Snapshot};
pub use contentdb::ContentDb;
pub use download::{Downloader, Source};
pub use game::Game;
pub use minemod::{MineMod, Modpack};
pub use world::World;

use error::Result;

/// Scan all files in the given directory.
///
/// Files for which `scanner` returns `Ok(..)` will be collected and returned. Files for which
/// `scanner` returns `Err(..)` will be silently discarded.
///
/// ```rust
/// use modderbaas::minemod::MineMod;
/// let mods = scan("/tmp", |p| MineMod::open(p))?;
/// ```
pub fn scan<W, P: AsRef<Path>, F: for<'p> Fn(&'p Path) -> Result<W>>(
    path: P,
    scanner: F,
) -> Result<Vec<W>> {
    debug!("Scanning through {:?}", path.as_ref());
    let mut good_ones = vec![];
    for entry in fs::read_dir(path)? {
        let entry = entry?;
        if let Ok(i) = scanner(&entry.path()) {
            good_ones.push(i);
        }
    }
    Ok(good_ones)
}