use serde::{Deserialize, Serialize};

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

pub struct PrioId;

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct PrioIdRequest {
    pub prio: Priority,
    pub songids: Vec<SongId>,
}

impl Command for PrioId {
    type Request = PrioIdRequest;
    type Response = ();
    const COMMAND: &'static str = "prioid";

    fn serialize_request(&self, request: Self::Request) -> String {
        let songids = request
            .songids
            .iter()
            .map(|id| id.to_string())
            .collect::<Vec<String>>()
            .join(",");
        format!("{} {} {}", Self::COMMAND, request.prio, songids)
    }

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

        let songids = parts.next().ok_or(RequestParserError::UnexpectedEOF)?;
        // TODO: This is just a guess to satisfy compilation, double check it
        let songids = songids
            .split(',')
            .map(|s| {
                s.parse()
                    .map_err(|_| RequestParserError::SyntaxError(0, s.to_string()))
            })
            .collect::<Result<Vec<u32>, RequestParserError>>()?;

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

        Ok((Request::PrioId(prio, songids), ""))
    }

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