use crate::{
    Request,
    request_tokenizer::RequestTokenizer,
    commands::{
        Command, RequestParserError, RequestParserResult, ResponseAttributes, ResponseParserError,
    },
    common::SongId,
};

pub struct DeleteId;

impl Command for DeleteId {
    type Request = SongId;
    type Response = ();
    const COMMAND: &'static str = "deleteid";

    fn serialize_request(&self, request: Self::Request) -> String {
        format!("{} {}", Self::COMMAND, request)
    }

    fn parse_request(mut parts: RequestTokenizer<'_>) -> RequestParserResult<'_> {
        let id = parts.next().ok_or(RequestParserError::UnexpectedEOF)?;
        let id = id
            .parse()
            .map_err(|_| RequestParserError::SyntaxError(0, id.to_string()))?;

        debug_assert!(parts.next().is_none());

        Ok((Request::DeleteId(id), ""))
    }

    fn parse_response(
        parts: ResponseAttributes<'_>,
    ) -> Result<Self::Response, ResponseParserError<'_>> {
        debug_assert!(parts.is_empty());
        Ok(())
    }
}