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use crate::{
    codec::{Codec, WithOffset, WithSize},
    spec::v1_2 as spec,
    wizzilab::v5_3::operand,
};

#[derive(Clone, Debug, PartialEq)]
pub struct Forward {
    // ALP_SPEC Ask for response ?
    pub resp: bool,
    pub conf: operand::InterfaceConfiguration,
}
impl std::fmt::Display for Forward {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        write!(f, "{}{}", if self.resp { "[R]" } else { "-" }, self.conf)
    }
}
impl Codec for Forward {
    type Error = operand::InterfaceConfigurationDecodingError;
    fn encoded_size(&self) -> usize {
        1 + self.conf.encoded_size()
    }
    unsafe fn encode_in(&self, out: &mut [u8]) -> usize {
        out[0] |= (self.resp as u8) << 6;
        1 + self.conf.encode_in(&mut out[1..])
    }
    fn decode(out: &[u8]) -> Result<WithSize<Self>, WithOffset<Self::Error>> {
        let min_size = 1 + 1;
        if out.len() < min_size {
            return Err(WithOffset::new(
                0,
                Self::Error::MissingBytes(min_size - out.len()),
            ));
        }
        let WithSize {
            value: conf,
            size: conf_size,
        } = operand::InterfaceConfiguration::decode(&out[1..]).map_err(|e| e.shift(1))?;
        Ok(WithSize {
            value: Self {
                resp: out[0] & 0x40 != 0,
                conf,
            },
            size: 1 + conf_size,
        })
    }
}
impl From<spec::action::Forward> for Forward {
    fn from(o: spec::action::Forward) -> Self {
        Self {
            resp: o.resp,
            conf: o.conf.into(),
        }
    }
}
impl From<Forward> for spec::action::Forward {
    fn from(o: Forward) -> Self {
        Self {
            resp: o.resp,
            conf: o.conf.into(),
        }
    }
}