use serde::{Deserialize, Serialize};

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

pub struct MoveId;

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct MoveIdRequest {
    pub id: SongId,
    pub to: AbsouluteRelativeSongPosition,
}

impl CommandRequest<'_> for MoveIdRequest {
    const COMMAND: &'static str = "moveid";

    fn into_request_enum(self) -> crate::Request {
        crate::Request::MoveId(self.id, self.to)
    }

    fn from_request_enum(request: crate::Request) -> Option<Self> {
        match request {
            crate::Request::MoveId(id, to) => Some(MoveIdRequest { id, to }),
            _ => None,
        }
    }

    fn serialize(&self) -> String {
        format!("{} {} {}", Self::COMMAND, self.id, self.to)
    }

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

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

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

        Ok(MoveIdRequest { id, to })
    }
}

empty_command_response!(MoveId);

impl Command<'_, '_> for MoveId {
    type Request = MoveIdRequest;
    type Response = MoveIdResponse;
}