use std::path::{Path, PathBuf};

const VIDEO_EXTENSIONS: &[&str] = &[".mp4", ".mkv", ".avi", ".mov", ".webm", ".m4v"];

pub fn is_video_file(path: &Path) -> bool {
    if let Some(ext) = path.extension() {
        if let Some(ext_str) = ext.to_str() {
            return VIDEO_EXTENSIONS.contains(&ext_str.to_lowercase().as_str());
        }
    }
    false
}

pub fn find_largest_video_file(files: &[(String, u64)]) -> Option<(usize, String, u64)> {
    let video_files: Vec<_> = files
        .iter()
        .enumerate()
        .filter(|(_, (name, _))| {
            let path = Path::new(name);
            is_video_file(path)
        })
        .map(|(idx, (name, size))| (idx, name.clone(), *size))
        .collect();

    if video_files.is_empty() {
        return None;
    }

    // Find the largest video file
    video_files
        .into_iter()
        .max_by_key(|(_, _, size)| *size)
        .map(|(idx, name, size)| (idx, name, size))
}