use serde::{Deserialize, Serialize};

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

pub struct RangeId;

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct RangeIdRequest {
    songid: SongId,
    time_interval: TimeInterval,
}

impl Command for RangeId {
    type Request = RangeIdRequest;
    type Response = ();
    const COMMAND: &'static str = "rangeid";

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

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

        let time_interval = parts.next().ok_or(RequestParserError::UnexpectedEOF)?;
        let time_interval = time_interval
            .parse()
            .map_err(|_| RequestParserError::SyntaxError(0, time_interval.to_string()))?;

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

        Ok((Request::RangeId(songid, time_interval), ""))
    }

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