use anyhow::Result;
use chrono::{DateTime, Datelike, Local};
use std::path::{Path, PathBuf};
use std::time::SystemTime;

pub fn to_snail_case(from: impl Into<String>) -> String {
    from.into().replace(' ', "_").to_lowercase()
}

//     pub fn to_title_case(from: &str) -> String {
//         from.to_string().split(|c| c ==' ' || c == '_').map(|s| {if s.len() >= 1 {s[0 as usize] = s[0 as usize].to_uppercase()}}).collect()
//     }

pub fn get_current_semester() -> String {
    let today = DateTime::<Local>::from(SystemTime::now())
        .date()
        .naive_local();
    let (part, year) = if today.month() >= 4 && today.month() < 10 {
        ("SS", today.year())
    } else {
        (
            "WS",
            if today.month() >= 10 {
                today.year()
            } else {
                today.year() - 1
            },
        )
    };
    format!("{}{}", part, year - 2000)
}

pub fn glob_paths<P: AsRef<Path>, S: AsRef<str>>(path: P, pattern: S) -> Result<Vec<PathBuf>> {
    let mut paths = vec![];
    let pattern = [
        (*(path.as_ref())).canonicalize()?.to_str().unwrap(),
        pattern.as_ref(),
    ]
    .concat();
    for entry in glob::glob(pattern.as_str())? {
        let path = entry?;
        paths.push(path);
    }
    Ok(paths)
}