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

pub struct BinaryLimit;

impl Command for BinaryLimit {
    type Request = u64;
    type Response = ();
    const COMMAND: &'static str = "binarylimit";

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

    fn parse_request(mut parts: RequestTokenizer<'_>) -> RequestParserResult<'_> {
        let limit = parts.next().ok_or(RequestParserError::UnexpectedEOF)?;
        let limit = limit
            .parse()
            .map_err(|_| RequestParserError::SyntaxError(0, limit.to_string()))?;
        debug_assert!(parts.next().is_none());
        Ok((Request::BinaryLimit(limit), ""))
    }

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