use std::path::PathBuf;
use thiserror::Error;
use async_trait::async_trait;
use crate::song::Song;

#[derive(Debug, Clone)]
pub enum TabSource {
    File(PathBuf),
    Url(String),
}

#[derive(Debug, Error)]
pub enum FetchError {
    #[error("IO error: {0}")]
    Io(#[from] std::io::Error),
    #[error("Network error: {0}")]
    Network(String),
    #[error("Response is not HTML")]
    InvalidContentType,
}

#[derive(Debug, Error)]
pub enum ParseError {
    #[error("Tab content not found in HTML")]
    MissingContent,
    #[error("Malformed HTML: {0}")]
    MalformedHtml(String),
}

#[async_trait]
pub trait TabFetcherPort: Send + Sync {
    async fn fetch(&self, source: TabSource) -> Result<String, FetchError>;
}

pub trait TabParserPort: Send + Sync {
    fn parse(&self, html: &str) -> Result<Song, ParseError>;
}