use serde::{Deserialize, Serialize};

use crate::{
    commands::{Command, CommandRequest, RequestParserError, empty_command_response},
    request_tokenizer::RequestTokenizer,
    types::{SongId, TimeInterval},
};

pub struct RangeId;

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

impl CommandRequest for RangeIdRequest {
    const COMMAND: &'static str = "rangeid";

    fn into_request_enum(self) -> crate::Request {
        crate::Request::RangeId(self.songid, self.time_interval)
    }

    fn from_request_enum(request: crate::Request) -> Option<Self> {
        match request {
            crate::Request::RangeId(songid, time_interval) => Some(RangeIdRequest {
                songid,
                time_interval,
            }),
            _ => None,
        }
    }

    fn serialize(&self) -> String {
        format!("{} {} {}\n", Self::COMMAND, self.songid, self.time_interval)
    }

    fn parse(mut parts: RequestTokenizer<'_>) -> Result<Self, RequestParserError> {
        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(RangeIdRequest {
            songid,
            time_interval,
        })
    }
}

empty_command_response!(RangeId);

impl Command for RangeId {
    type Request = RangeIdRequest;
    type Response = RangeIdResponse;
}