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

pub struct PlaylistInfo;

impl Command for PlaylistInfo {
    type Request = Option<OneOrRange>;
    type Response = ();
    const COMMAND: &'static str = "playlistinfo";

    fn serialize_request(&self, request: Self::Request) -> String {
        match request {
            Some(one_or_range) => format!("{} {}", Self::COMMAND, one_or_range),
            None => Self::COMMAND.to_string(),
        }
    }

    fn parse_request(mut parts: RequestTokenizer<'_>) -> RequestParserResult<'_> {
        let one_or_range = parts
            .next()
            .map(|s| {
                s.parse()
                    .map_err(|_| RequestParserError::SyntaxError(0, s.to_string()))
            })
            .transpose()?;

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

        Ok((Request::PlaylistInfo(one_or_range), ""))
    }

    fn parse_response(
        _parts: ResponseAttributes<'_>,
    ) -> Result<Self::Response, ResponseParserError<'_>> {
        unimplemented!()
    }
}