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// This file is part of the SORA network and Polkaswap app.

// Copyright (c) 2020, 2021, Polka Biome Ltd. All rights reserved.
// SPDX-License-Identifier: BSD-4-Clause

// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:

// Redistributions of source code must retain the above copyright notice, this list
// of conditions and the following disclaimer.
// Redistributions in binary form must reproduce the above copyright notice, this
// list of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// All advertising materials mentioning features or use of this software must display
// the following acknowledgement: This product includes software developed by Polka Biome
// Ltd., SORA, and Polkaswap.
//
// Neither the name of the Polka Biome Ltd. nor the names of its contributors may be used
// to endorse or promote products derived from this software without specific prior written permission.

// THIS SOFTWARE IS PROVIDED BY Polka Biome Ltd. AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Polka Biome Ltd. BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
// USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

use crate::types::{H256, U64};
use alloc::string::String;
use codec::{Decode, Encode};
use serde::Deserialize;
#[cfg(test)]
use serde::Serialize;
use sp_std::vec::Vec;

/// Simple blob to hold an extrinsic without committing to its format and ensure it is serialized
/// correctly.
#[derive(PartialEq, Eq, Clone, Default, Encode, Decode, scale_info::TypeInfo)]
pub struct OpaqueExtrinsic(Vec<u8>);

#[cfg(test)]
impl ::serde::Serialize for OpaqueExtrinsic {
    fn serialize<S>(&self, seq: S) -> Result<S::Ok, S::Error>
    where
        S: ::serde::Serializer,
    {
        codec::Encode::using_encoded(&self.0, |bytes| ::sp_core::bytes::serialize(bytes, seq))
    }
}

impl<'a> serde::Deserialize<'a> for OpaqueExtrinsic {
    fn deserialize<D>(de: D) -> Result<Self, D::Error>
    where
        D: serde::Deserializer<'a>,
    {
        let s: String = Deserialize::deserialize(de)?;
        let r = common::utils::parse_hex_string(&s).ok_or(serde::de::Error::custom(format!(
            "Expected hex string \"0x..\""
        )))?;
        Decode::decode(&mut &r[..])
            .map_err(|e| serde::de::Error::custom(format!("Decode error: {}", e)))
    }
}

#[derive(Deserialize)]
#[cfg_attr(test, derive(Serialize))]
#[serde(rename_all = "camelCase")]
pub struct SubstrateHeaderLimited {
    /// The parent hash.
    #[serde(skip)]
    pub parent_hash: H256,
    /// The block number (actually, 32-bit).
    pub number: U64,
    /// The state trie merkle root
    #[serde(skip)]
    pub state_root: H256,
    /// The merkle root of the extrinsics.
    #[serde(skip)]
    pub extrinsics_root: H256,
    /// A chain-specific digest of data useful for light clients or referencing auxiliary data.
    #[serde(skip)]
    pub digest: (),
}

#[derive(Deserialize)]
#[cfg_attr(test, derive(Serialize))]
#[serde(rename_all = "camelCase")]
pub struct SubstrateBlockLimited {
    /// The block header.
    pub header: SubstrateHeaderLimited,
    /// The accompanying extrinsics.
    pub extrinsics: Vec<OpaqueExtrinsic>,
}

#[derive(Deserialize)]
#[cfg_attr(test, derive(Serialize))]
#[serde(rename_all = "camelCase")]
pub struct SubstrateSignedBlockLimited {
    /// Full block.
    pub block: SubstrateBlockLimited,
}