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//! Block metadata

use serde::{Deserialize, Serialize};
use tendermint_proto::v0_37::types::BlockMeta as RawMeta;

use super::{Header, Id};
use crate::prelude::*;

/// Block metadata - Todo: implement constructor and getters
#[derive(Serialize, Deserialize, Clone, Debug)]
#[serde(try_from = "RawMeta", into = "RawMeta")]
pub struct Meta {
    /// ID of the block
    pub block_id: Id,

    /// block size - Todo: make this robust (u63)
    pub block_size: i64,

    /// Header of the block
    pub header: Header,

    /// Number of transactions - Todo: make this robust (u63)
    pub num_txs: i64,
}

tendermint_pb_modules! {
    use super::Meta;
    use crate::{error::Error, prelude::*};
    use pb::types::BlockMeta as RawMeta;

    impl TryFrom<RawMeta> for Meta {
        type Error = Error;

        fn try_from(value: RawMeta) -> Result<Self, Self::Error> {
            Ok(Meta {
                block_id: value
                    .block_id
                    .ok_or_else(|| Error::invalid_block("no block_id".to_string()))?
                    .try_into()?,
                block_size: value.block_size,
                header: value
                    .header
                    .ok_or_else(|| Error::invalid_block("no header".to_string()))?
                    .try_into()?,
                num_txs: value.num_txs,
            })
        }
    }

    impl From<Meta> for RawMeta {
        fn from(value: Meta) -> Self {
            RawMeta {
                block_id: Some(value.block_id.into()),
                block_size: value.block_size,
                header: Some(value.header.into()),
                num_txs: value.num_txs,
            }
        }
    }
}