use arboard::Clipboard;

#[derive(Debug, thiserror::Error)]
enum Error {
    #[error("Failed to write to file: {0}")]
    Io(#[from] std::io::Error),
    #[error("Failed to get clipboard text: {0}")]
    Clipboard(#[from] arboard::Error),
}

pub fn main() {
    let mut clipboard = Clipboard::new().unwrap();
    let mut last_content = String::new();

    loop {
        if let Err(e) = check_clipboard(&mut clipboard, &mut last_content) {
            println!("{}", e);
        }
        std::thread::sleep(std::time::Duration::from_millis(500));
    }
}

fn check_clipboard(clipboard: &mut Clipboard, last_content: &mut String) -> Result<(), Error> {
    let current_content = clipboard.get_text()?;
    if &current_content != last_content {
        println!("Clipboard text changed: {}", current_content);

        // extract file path from copied text
        if let Some(file_path) = current_content
            // split into lines
            .lines()
            // get the first line
            .next()
            // check it starts with "// " and strip it
            .and_then(|l| l.strip_prefix("// "))
        {
            std::fs::write(file_path.trim(), &current_content)?;
            println!("Successfully wrote to {}", &current_content);
        };
        *last_content = current_content;
    }
    Ok(())
}