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//! This module provides Wormhole primitives.
//!
//! Wormhole does not provide an SDK for working with Solana versions of Wormhole related types, so
//! we clone the definitions from the Solana contracts here and adapt them to Pyth purposes. This
//! allows us to emit and parse messages through Wormhole.
use {
    crate::Pubkey,
    borsh::{
        BorshDeserialize,
        BorshSerialize,
    },
    serde::{
        Deserialize,
        Serialize,
    },
    std::{
        io::{
            // Error,
            // ErrorKind::InvalidData,
            Write,
        },
        ops::{
            Deref,
            DerefMut,
        },
    },
};

#[repr(transparent)]
#[derive(Default, PartialEq, Debug)]
pub struct PostedMessageUnreliableData {
    pub message: MessageData,
}

#[derive(
    Debug, Default, BorshSerialize, BorshDeserialize, Clone, Serialize, Deserialize, PartialEq,
)]
pub struct MessageData {
    pub vaa_version:           u8,
    pub consistency_level:     u8,
    pub vaa_time:              u32,
    pub vaa_signature_account: Pubkey,
    pub submission_time:       u32,
    pub nonce:                 u32,
    pub sequence:              u64,
    pub emitter_chain:         u16,
    pub emitter_address:       [u8; 32],
    pub payload:               Vec<u8>,
}

impl BorshSerialize for PostedMessageUnreliableData {
    fn serialize<W: Write>(&self, writer: &mut W) -> std::io::Result<()> {
        writer.write_all(b"msu")?;
        BorshSerialize::serialize(&self.message, writer)
    }
}

// impl BorshDeserialize for PostedMessageUnreliableData {
//     fn deserialize_reader<R: std::io::prelude::Read>(reader: &mut R) -> std::io::Result<Self> {
//         let mut magic = [0u8; 3];
//         reader.read_exact(&mut magic)?;

//         let expected = b"msu";
//         if &magic != expected {
//             return Err(Error::new(
//                 InvalidData,
//                 format!("Magic mismatch. Expected {expected:?} but got {magic:?}"),
//             ));
//         };
//         Ok(PostedMessageUnreliableData {
//             message: <MessageData as BorshDeserialize>::deserialize_reader(reader)?,
//         })
//     }
// }

impl Deref for PostedMessageUnreliableData {
    type Target = MessageData;
    fn deref(&self) -> &Self::Target {
        &self.message
    }
}

impl DerefMut for PostedMessageUnreliableData {
    fn deref_mut(&mut self) -> &mut Self::Target {
        &mut self.message
    }
}

impl Clone for PostedMessageUnreliableData {
    fn clone(&self) -> Self {
        PostedMessageUnreliableData {
            message: self.message.clone(),
        }
    }
}

#[derive(Default, Clone, Copy, BorshDeserialize, BorshSerialize)]
pub struct AccumulatorSequenceTracker {
    pub sequence: u64,
}

// #[test]
// fn test_borsh_roundtrip() {
//     let post_message_unreliable_data = PostedMessageUnreliableData {
//         message: MessageData {
//             vaa_version:           1,
//             consistency_level:     2,
//             vaa_time:              3,
//             vaa_signature_account: [4u8; 32],
//             submission_time:       5,
//             nonce:                 6,
//             sequence:              7,
//             emitter_chain:         8,
//             emitter_address:       [9u8; 32],
//             payload:               vec![10u8; 32],
//         },
//     };


//     let encoded = borsh::to_vec(&post_message_unreliable_data).unwrap();

//     let decoded = PostedMessageUnreliableData::try_from_slice(encoded.as_slice()).unwrap();
//     assert_eq!(decoded, post_message_unreliable_data);
// }