//
use std::path::Path;

use crate::model::{Config, Line, Marker, Markers};
use anyhow::Result;
use ignore::Walk;

pub fn find_markers(config: &Config) -> Result<Markers, anyhow::Error> {
    let mut markers = Markers::default();
    for file in Walk::new(config.fs().base()).flatten() {
        let path = file.path();
        if config.fs().path_is_file(path)? {
            scan_file(path, config, &mut markers)?;
        }
    }
    Ok(markers)
}

fn scan_file(file: &Path, config: &Config, found_markers: &mut Markers) -> Result<()> {
    let relative_path = file.strip_prefix(config.fs().base())?.to_path_buf();
    config
        .fs()
        .file_read_to_string(file)?
        .lines()
        .enumerate()
        .map(|(n, line)| {
            Line::builder()
                .file(file.to_path_buf())
                .relative_path(relative_path.clone())
                .num(n)
                .value(line.to_owned())
                .build()
        })
        .filter_map(|line| line.into_marker().ok())
        .filter(|marker| !matches!(marker, Marker::Unmarked))
        .for_each(|marker| found_markers.add_marker(marker));

    Ok(())
}