// Copyright 2021 Parity Technologies (UK) Ltd.
// This file is part of Cumulus.

// Cumulus 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.

// Cumulus 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 Cumulus.  If not, see <http://www.gnu.org/licenses/>.

//! Parachain-specific RPCs implementation.

#![warn(missing_docs)]

use std::sync::Arc;

use pallet_contracts_rpc::{Contracts, ContractsApi};
use parachains_common::{AccountId, Balance, Block, BlockNumber, Hash, Index as Nonce};
use sc_client_api::AuxStore;
pub use sc_rpc::{DenyUnsafe, SubscriptionTaskExecutor};
use sc_transaction_pool_api::TransactionPool;
use sp_api::ProvideRuntimeApi;
use sp_block_builder::BlockBuilder;
use sp_blockchain::{Error as BlockChainError, HeaderBackend, HeaderMetadata};

/// A type representing all RPC extensions.
pub type RpcExtension = jsonrpc_core::IoHandler<sc_rpc::Metadata>;

/// Full client dependencies
pub struct FullDeps<C, P> {
	/// The client instance to use.
	pub client: Arc<C>,
	/// Transaction pool instance.
	pub pool: Arc<P>,
	/// Whether to deny unsafe calls
	pub deny_unsafe: DenyUnsafe,
}

/// Instantiate all RPC extensions.
pub fn create_full<C, P>(deps: FullDeps<C, P>) -> RpcExtension
where
	C: ProvideRuntimeApi<Block>
		+ HeaderBackend<Block>
		+ AuxStore
		+ HeaderMetadata<Block, Error = BlockChainError>
		+ Send
		+ Sync
		+ 'static,
	C::Api: frame_rpc_system::AccountNonceApi<Block, AccountId, Nonce>,
	C::Api: pallet_transaction_payment_rpc::TransactionPaymentRuntimeApi<Block, Balance>,
	C::Api: BlockBuilder<Block>,
	P: TransactionPool + Sync + Send + 'static,
{
	use frame_rpc_system::{FullSystem, SystemApi};
	use pallet_transaction_payment_rpc::{TransactionPayment, TransactionPaymentApi};

	let mut io = jsonrpc_core::IoHandler::default();
	let FullDeps { client, pool, deny_unsafe } = deps;

	io.extend_with(SystemApi::to_delegate(FullSystem::new(client.clone(), pool, deny_unsafe)));
	io.extend_with(TransactionPaymentApi::to_delegate(TransactionPayment::new(client.clone())));

	io
}

/// Instantiate all RPCs we want at the canvas-kusama chain.
pub fn create_canvas_kusama<C, P>(deps: FullDeps<C, P>) -> RpcExtension
where
	C: ProvideRuntimeApi<Block>
		+ HeaderBackend<Block>
		+ AuxStore
		+ HeaderMetadata<Block, Error = BlockChainError>
		+ Send
		+ Sync
		+ 'static,
	C::Api: frame_rpc_system::AccountNonceApi<Block, AccountId, Nonce>,
	C::Api: pallet_transaction_payment_rpc::TransactionPaymentRuntimeApi<Block, Balance>,
	C::Api: pallet_contracts_rpc::ContractsRuntimeApi<Block, AccountId, Balance, BlockNumber, Hash>,
	C::Api: BlockBuilder<Block>,
	P: TransactionPool + Sync + Send + 'static,
{
	use frame_rpc_system::{FullSystem, SystemApi};
	use pallet_transaction_payment_rpc::{TransactionPayment, TransactionPaymentApi};

	let mut io = jsonrpc_core::IoHandler::default();
	let FullDeps { client, pool, deny_unsafe } = deps;

	io.extend_with(SystemApi::to_delegate(FullSystem::new(client.clone(), pool, deny_unsafe)));
	io.extend_with(TransactionPaymentApi::to_delegate(TransactionPayment::new(client.clone())));
	io.extend_with(ContractsApi::to_delegate(Contracts::new(client)));

	io
}