use std::fs::File;
use std::io::{self, BufRead};
use std::path::Path;
use std::string::String;

fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
    where P: AsRef<Path>, {
    let file = File::open(filename)?;
    Ok(io::BufReader::new(file).lines())
}

#[derive(Debug)]
pub struct Playlist {
    path: String,
    tracks: Box<Vec<String>>
}

impl Playlist {
    pub fn read(path: &str) -> Result<Playlist, io::Error> {
        let playlist_path: String = String::from(path);
        let mut playlist_tracks: Vec<String> = Vec::new();
        let lines = read_lines(path)?;
        lines.for_each(|read_line| {
            if read_line.is_ok() {
                let line = read_line.unwrap();
                if line.len() > 0 && !line.starts_with("#") {
                    playlist_tracks.push(line)
                }
            }
        });
        Ok(Playlist { path: playlist_path, tracks: Box::new(playlist_tracks) })
    }
}