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use crate::{
    certificate::{BftLeaderBindingSignature, CertificateSlice},
    key::BftLeaderId,
    transaction::{Payload, PayloadAuthData, PayloadData, PayloadSlice},
};

use chain_core::{
    packer::Codec,
    property::{Deserialize, DeserializeFromSlice, ReadError, Serialize, WriteError},
};
use typed_bytes::{ByteArray, ByteBuilder};

pub type UpdateVoterId = BftLeaderId;
pub type UpdateProposalId = crate::fragment::FragmentId;

#[derive(Debug, Clone, PartialEq, Eq, Hash)]
#[cfg_attr(
    any(test, feature = "property-test-api"),
    derive(test_strategy::Arbitrary)
)]
pub struct UpdateVote {
    proposal_id: UpdateProposalId,
    voter_id: UpdateVoterId,
}

impl UpdateVote {
    pub fn new(proposal_id: UpdateProposalId, voter_id: UpdateVoterId) -> Self {
        Self {
            proposal_id,
            voter_id,
        }
    }

    pub fn proposal_id(&self) -> &UpdateProposalId {
        &self.proposal_id
    }

    pub fn voter_id(&self) -> &UpdateVoterId {
        &self.voter_id
    }

    pub fn serialize_in(&self, bb: ByteBuilder<Self>) -> ByteBuilder<Self> {
        bb.bytes(self.proposal_id.as_ref())
            .bytes(self.voter_id.as_ref())
    }

    pub fn serialize(&self) -> ByteArray<Self> {
        self.serialize_in(ByteBuilder::new()).finalize()
    }
}

/* Auth/Payload ************************************************************* */

impl Payload for UpdateVote {
    const HAS_DATA: bool = true;
    const HAS_AUTH: bool = true;
    type Auth = BftLeaderBindingSignature;

    fn payload_data(&self) -> PayloadData<Self> {
        PayloadData(
            self.serialize_in(ByteBuilder::new())
                .finalize_as_vec()
                .into(),
            std::marker::PhantomData,
        )
    }

    fn payload_auth_data(auth: &Self::Auth) -> PayloadAuthData<Self> {
        let bb = ByteBuilder::<Self>::new()
            .bytes(auth.as_ref())
            .finalize_as_vec();
        PayloadAuthData(bb.into(), std::marker::PhantomData)
    }

    fn payload_to_certificate_slice(p: PayloadSlice<'_, Self>) -> Option<CertificateSlice<'_>> {
        Some(CertificateSlice::from(p))
    }
}

/* Ser/De ******************************************************************* */

impl Serialize for UpdateVote {
    fn serialized_size(&self) -> usize {
        self.proposal_id.serialized_size() + self.voter_id.serialized_size()
    }

    fn serialize<W: std::io::Write>(&self, codec: &mut Codec<W>) -> Result<(), WriteError> {
        self.proposal_id.serialize(codec)?;
        self.voter_id.serialize(codec)
    }
}

impl DeserializeFromSlice for UpdateVote {
    fn deserialize_from_slice(codec: &mut Codec<&[u8]>) -> Result<Self, ReadError> {
        let proposal_id = UpdateProposalId::deserialize(codec)?;
        let voter_id = UpdateVoterId::deserialize_from_slice(codec)?;

        Ok(Self::new(proposal_id, voter_id))
    }
}