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// This file is part of Substrate.

// Copyright (C) Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.

//! Contains mock implementations of `ChainSync` and 'BlockDownloader'.

use crate::block_relay_protocol::{BlockDownloader as BlockDownloaderT, BlockResponseError};

use futures::channel::oneshot;
use libp2p::PeerId;
use sc_network::RequestFailure;
use sc_network_common::sync::{
	message::{BlockAnnounce, BlockData, BlockRequest, BlockResponse},
	BadPeer, ChainSync as ChainSyncT, ImportBlocksAction, Metrics, OnBlockData,
	OnBlockJustification, PeerInfo, SyncStatus,
};
use sp_runtime::traits::{Block as BlockT, NumberFor};

mockall::mock! {
	pub ChainSync<Block: BlockT> {}

	impl<Block: BlockT> ChainSyncT<Block> for ChainSync<Block> {
		fn peer_info(&self, who: &PeerId) -> Option<PeerInfo<Block>>;
		fn status(&self) -> SyncStatus<Block>;
		fn num_sync_requests(&self) -> usize;
		fn num_downloaded_blocks(&self) -> usize;
		fn num_peers(&self) -> usize;
		fn new_peer(
			&mut self,
			who: PeerId,
			best_hash: Block::Hash,
			best_number: NumberFor<Block>,
		) -> Result<Option<BlockRequest<Block>>, BadPeer>;
		fn update_chain_info(&mut self, best_hash: &Block::Hash, best_number: NumberFor<Block>);
		fn request_justification(&mut self, hash: &Block::Hash, number: NumberFor<Block>);
		fn clear_justification_requests(&mut self);
		fn set_sync_fork_request(
			&mut self,
			peers: Vec<PeerId>,
			hash: &Block::Hash,
			number: NumberFor<Block>,
		);
		fn on_block_data(
			&mut self,
			who: &PeerId,
			request: Option<BlockRequest<Block>>,
			response: BlockResponse<Block>,
		) -> Result<OnBlockData<Block>, BadPeer>;
		fn on_block_justification(
			&mut self,
			who: PeerId,
			response: BlockResponse<Block>,
		) -> Result<OnBlockJustification<Block>, BadPeer>;
		fn on_justification_import(
			&mut self,
			hash: Block::Hash,
			number: NumberFor<Block>,
			success: bool,
		);
		fn on_block_finalized(&mut self, hash: &Block::Hash, number: NumberFor<Block>);
		fn on_validated_block_announce(
			&mut self,
			is_best: bool,
			who: PeerId,
			announce: &BlockAnnounce<Block::Header>,
		);
		fn peer_disconnected(&mut self, who: &PeerId) -> Option<ImportBlocksAction<Block>>;
		fn metrics(&self) -> Metrics;
	}
}

mockall::mock! {
	pub BlockDownloader<Block: BlockT> {}

	#[async_trait::async_trait]
	impl<Block: BlockT> BlockDownloaderT<Block> for BlockDownloader<Block> {
		async fn download_blocks(
			&self,
			who: PeerId,
			request: BlockRequest<Block>,
		) -> Result<Result<Vec<u8>, RequestFailure>, oneshot::Canceled>;
		fn block_response_into_blocks(
			&self,
			request: &BlockRequest<Block>,
			response: Vec<u8>,
		) -> Result<Vec<BlockData<Block>>, BlockResponseError>;
	}
}