// Copyright 2019-2021 Parity Technologies (UK) Ltd.
// This file is part of Parity Bridges Common.

// Parity Bridges Common 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.

// Parity Bridges Common 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 Parity Bridges Common.  If not, see <http://www.gnu.org/licenses/>.

use crate::cli::{Cli, Subcommand};
use frame_benchmarking_cli::BenchmarkCmd;
use rialto_runtime::{Block, RuntimeApi};
use sc_cli::SubstrateCli;

impl SubstrateCli for Cli {
	fn impl_name() -> String {
		"Rialto Bridge Node".into()
	}

	fn impl_version() -> String {
		env!("CARGO_PKG_VERSION").into()
	}

	fn description() -> String {
		"Rialto Bridge Node".into()
	}

	fn author() -> String {
		"Parity Technologies".into()
	}

	fn support_url() -> String {
		"https://github.com/paritytech/parity-bridges-common/".into()
	}

	fn copyright_start_year() -> i32 {
		2019
	}

	fn executable_name() -> String {
		"rialto-bridge-node".into()
	}

	fn load_spec(&self, id: &str) -> Result<Box<dyn sc_service::ChainSpec>, String> {
		Ok(Box::new(
			match id {
				"" | "dev" => crate::chain_spec::Alternative::Development,
				"local" => crate::chain_spec::Alternative::LocalTestnet,
				_ => return Err(format!("Unsupported chain specification: {id}")),
			}
			.load(),
		))
	}
}

// Rialto native executor instance.
pub struct ExecutorDispatch;

impl sc_executor::NativeExecutionDispatch for ExecutorDispatch {
	type ExtendHostFunctions = frame_benchmarking::benchmarking::HostFunctions;

	fn dispatch(method: &str, data: &[u8]) -> Option<Vec<u8>> {
		rialto_runtime::api::dispatch(method, data)
	}

	fn native_version() -> sc_executor::NativeVersion {
		rialto_runtime::native_version()
	}
}

/// Parse and run command line arguments
pub fn run() -> sc_cli::Result<()> {
	let cli = Cli::from_args();
	sp_core::crypto::set_default_ss58_version(sp_core::crypto::Ss58AddressFormat::custom(
		rialto_runtime::SS58Prefix::get() as u16,
	));

	match &cli.subcommand {
		Some(Subcommand::Benchmark(cmd)) => {
			let runner = cli.create_runner(cmd)?;
			match cmd {
				BenchmarkCmd::Pallet(cmd) =>
					if cfg!(feature = "runtime-benchmarks") {
						runner.sync_run(|config| cmd.run::<Block, ()>(config))
					} else {
						println!(
							"Benchmarking wasn't enabled when building the node. \
					You can enable it with `--features runtime-benchmarks`."
						);
						Ok(())
					},
				_ => Err("Unsupported benchmarking subcommand".into()),
			}
		},
		Some(Subcommand::Key(cmd)) => cmd.run(&cli),
		Some(Subcommand::Sign(cmd)) => cmd.run(),
		Some(Subcommand::Verify(cmd)) => cmd.run(),
		Some(Subcommand::Vanity(cmd)) => cmd.run(),
		Some(Subcommand::BuildSpec(cmd)) => {
			let runner = cli.create_runner(cmd)?;
			runner.sync_run(|config| cmd.run(config.chain_spec, config.network))
		},
		Some(Subcommand::CheckBlock(cmd)) => {
			let runner = cli.create_runner(cmd)?;
			runner.async_run(|mut config| {
				let (client, _, import_queue, task_manager) =
					polkadot_service::new_chain_ops(&mut config, None).map_err(service_error)?;
				Ok((cmd.run(client, import_queue), task_manager))
			})
		},
		Some(Subcommand::ExportBlocks(cmd)) => {
			let runner = cli.create_runner(cmd)?;
			runner.async_run(|mut config| {
				let (client, _, _, task_manager) =
					polkadot_service::new_chain_ops(&mut config, None).map_err(service_error)?;
				Ok((cmd.run(client, config.database), task_manager))
			})
		},
		Some(Subcommand::ExportState(cmd)) => {
			let runner = cli.create_runner(cmd)?;
			runner.async_run(|mut config| {
				let (client, _, _, task_manager) =
					polkadot_service::new_chain_ops(&mut config, None).map_err(service_error)?;
				Ok((cmd.run(client, config.chain_spec), task_manager))
			})
		},
		Some(Subcommand::ImportBlocks(cmd)) => {
			let runner = cli.create_runner(cmd)?;
			runner.async_run(|mut config| {
				let (client, _, import_queue, task_manager) =
					polkadot_service::new_chain_ops(&mut config, None).map_err(service_error)?;
				Ok((cmd.run(client, import_queue), task_manager))
			})
		},
		Some(Subcommand::PurgeChain(cmd)) => {
			let runner = cli.create_runner(cmd)?;
			runner.sync_run(|config| cmd.run(config.database))
		},
		Some(Subcommand::Revert(cmd)) => {
			let runner = cli.create_runner(cmd)?;
			runner.async_run(|mut config| {
				let (client, backend, _, task_manager) =
					polkadot_service::new_chain_ops(&mut config, None).map_err(service_error)?;
				Ok((cmd.run(client, backend, None), task_manager))
			})
		},
		Some(Subcommand::Inspect(cmd)) => {
			let runner = cli.create_runner(cmd)?;
			runner.sync_run(|config| cmd.run::<Block, RuntimeApi, ExecutorDispatch>(config))
		},
		None => {
			let runner = cli.create_runner(&cli.run)?;

			runner.run_node_until_exit(|config| async move {
				polkadot_service::new_full(
					config,
					polkadot_service::NewFullParams {
						is_parachain_node: polkadot_service::IsParachainNode::No,
						grandpa_pause: None,
						enable_beefy: true,
						jaeger_agent: None,
						telemetry_worker_handle: None,
						node_version: None,
						workers_path: None,
						workers_names: Some((
							"rialto-bridge-node-prepare-worker".to_string(),
							"rialto-bridge-node-execute-worker".to_string(),
						)),
						overseer_gen: polkadot_service::overseer::RealOverseerGen,
						overseer_message_channel_capacity_override: None,
						malus_finality_delay: None,
						hwbench: None,
					},
				)
				.map(|full| full.task_manager)
				.map_err(service_error)
			})
		},
	}
}

// We don't want to change 'service.rs' too much to ease future updates => it'll keep using
// its own error enum like original polkadot service does.
fn service_error(err: polkadot_service::Error) -> sc_cli::Error {
	sc_cli::Error::Application(Box::new(err))
}