#[macro_use]
pub mod error;
pub mod options;

mod analytics;
mod dump;
pub mod index;
pub mod index_controller;
mod index_resolver;
mod snapshot;
pub mod tasks;
mod update_file_store;

use std::path::Path;

pub use index_controller::MeiliSearch;
pub use milli;
pub use milli::heed;

mod compression;
pub mod document_formats;

use walkdir::WalkDir;

pub trait EnvSizer {
    fn size(&self) -> u64;
}

impl EnvSizer for milli::heed::Env {
    fn size(&self) -> u64 {
        WalkDir::new(self.path())
            .into_iter()
            .filter_map(|entry| entry.ok())
            .filter_map(|entry| entry.metadata().ok())
            .filter(|metadata| metadata.is_file())
            .fold(0, |acc, m| acc + m.len())
    }
}

/// Check if a db is empty. It does not provide any information on the
/// validity of the data in it.
/// We consider a database as non empty when it's a non empty directory.
pub fn is_empty_db(db_path: impl AsRef<Path>) -> bool {
    let db_path = db_path.as_ref();

    if !db_path.exists() {
        true
    // if we encounter an error or if the db is a file we consider the db non empty
    } else if let Ok(dir) = db_path.read_dir() {
        dir.count() == 0
    } else {
        true
    }
}