use maildir::Maildir;
use serde::Serialize;

use crate::error::Result;

#[derive(Serialize)]
pub struct CountInfo {
    total_mails: u32,
    byte_size: u64,
    unread_mails: u32,
}

pub fn count(md: &Maildir) -> Result<CountInfo> {
    Ok(CountInfo {
        total_mails: md.count_cur() as u32,
        unread_mails: md
            .list_cur()
            .filter(|x| x.as_ref().map_or(false, |z| !z.is_seen()))
            .count() as u32,
        byte_size: md
            .path()
            .join("cur")
            .read_dir()?
            .map(|x| x.map_or(0, |z| z.metadata().map_or(0, |y| y.len())))
            .sum(),
    })
}