use crate::{
	chain_spec,
	cli::{Cli, RelayChainCli, Subcommand},
};
use codec::Encode;
use cumulus_primitives_core::ParaId;
use cumulus_client_service::genesis::generate_genesis_block;
use log::info;
use parachain_runtime::Block;
use polkadot_parachain::primitives::AccountIdConversion;
use sc_cli::{
	ChainSpec, CliConfiguration, DefaultConfigurationValues, ImportParams, KeystoreParams,
	NetworkParams, Result, RuntimeVersion, SharedParams, SubstrateCli,
};
use sc_service::{
	config::{BasePath, PrometheusConfig},
	PartialComponents,
};
use sp_core::hexdisplay::HexDisplay;
use sp_runtime::traits::Block as BlockT;
use std::{io::Write, net::SocketAddr};

fn load_spec(
	id: &str,
	para_id: ParaId,
) -> std::result::Result<Box<dyn sc_service::ChainSpec>, String> {
	Ok(match id {
		"dev" => Box::new(chain_spec::development_config(para_id)),
		"" | "local" => Box::new(chain_spec::local_testnet_config(para_id)),
		path => Box::new(chain_spec::ChainSpec::from_json_file(
			std::path::PathBuf::from(path),
		)?),
	})
}

impl SubstrateCli for Cli {
	fn impl_name() -> String {
		"Parachain Collator Template".into()
	}

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

	fn description() -> String {
		format!(
			"Parachain Collator Template\n\nThe command-line arguments provided first will be \
		passed to the parachain node, while the arguments provided after -- will be passed \
		to the relaychain node.\n\n\
		{} [parachain-args] -- [relaychain-args]",
			Self::executable_name()
		)
	}

	fn author() -> String {
		env!("CARGO_PKG_AUTHORS").into()
	}

	fn support_url() -> String {
		"https://github.com/substrate-developer-hub/substrate-parachain-template/issues/new".into()
	}

	fn copyright_start_year() -> i32 {
		2017
	}

	fn load_spec(&self, id: &str) -> std::result::Result<Box<dyn sc_service::ChainSpec>, String> {
		load_spec(id, self.run.parachain_id.unwrap_or(200).into())
	}

	fn native_runtime_version(_: &Box<dyn ChainSpec>) -> &'static RuntimeVersion {
		&parachain_runtime::VERSION
	}
}

impl SubstrateCli for RelayChainCli {
	fn impl_name() -> String {
		"Parachain Collator Template".into()
	}

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

	fn description() -> String {
		"Parachain Collator Template\n\nThe command-line arguments provided first will be \
		passed to the parachain node, while the arguments provided after -- will be passed \
		to the relaychain node.\n\n\
		rococo-collator [parachain-args] -- [relaychain-args]"
			.into()
	}

	fn author() -> String {
		env!("CARGO_PKG_AUTHORS").into()
	}

	fn support_url() -> String {
		"https://github.com/substrate-developer-hub/substrate-parachain-template/issues/new".into()
	}

	fn copyright_start_year() -> i32 {
		2017
	}

	fn load_spec(&self, id: &str) -> std::result::Result<Box<dyn sc_service::ChainSpec>, String> {
		polkadot_cli::Cli::from_iter([RelayChainCli::executable_name().to_string()].iter())
			.load_spec(id)
	}

	fn native_runtime_version(chain_spec: &Box<dyn ChainSpec>) -> &'static RuntimeVersion {
		polkadot_cli::Cli::native_runtime_version(chain_spec)
	}
}

fn extract_genesis_wasm(chain_spec: &Box<dyn sc_service::ChainSpec>) -> Result<Vec<u8>> {
	let mut storage = chain_spec.build_storage()?;

	storage
		.top
		.remove(sp_core::storage::well_known_keys::CODE)
		.ok_or_else(|| "Could not find wasm file in genesis state!".into())
}

/// Parse command line arguments into service configuration.
pub fn run() -> Result<()> {
	let cli = Cli::from_args();

	match &cli.subcommand {
		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(|config| {
				let PartialComponents {
					client,
					task_manager,
					import_queue,
					..
				} = crate::service::new_partial(&config)?;
				Ok((cmd.run(client, import_queue), task_manager))
			})
		}
		Some(Subcommand::ExportBlocks(cmd)) => {
			let runner = cli.create_runner(cmd)?;
			runner.async_run(|config| {
				let PartialComponents {
					client,
					task_manager,
					..
				} = crate::service::new_partial(&config)?;
				Ok((cmd.run(client, config.database), task_manager))
			})
		}
		Some(Subcommand::ExportState(cmd)) => {
			let runner = cli.create_runner(cmd)?;
			runner.async_run(|config| {
				let PartialComponents {
					client,
					task_manager,
					..
				} = crate::service::new_partial(&config)?;
				Ok((cmd.run(client, config.chain_spec), task_manager))
			})
		}
		Some(Subcommand::ImportBlocks(cmd)) => {
			let runner = cli.create_runner(cmd)?;
			runner.async_run(|config| {
				let PartialComponents {
					client,
					task_manager,
					import_queue,
					..
				} = crate::service::new_partial(&config)?;
				Ok((cmd.run(client, import_queue), task_manager))
			})
		}
		Some(Subcommand::PurgeChain(cmd)) => {
			let runner = cli.create_runner(cmd)?;

			runner.sync_run(|config| {
				let polkadot_cli = RelayChainCli::new(
					&config,
					[RelayChainCli::executable_name().to_string()]
						.iter()
						.chain(cli.relaychain_args.iter()),
				);

				let polkadot_config = SubstrateCli::create_configuration(
					&polkadot_cli,
					&polkadot_cli,
					config.task_executor.clone(),
				)
				.map_err(|err| format!("Relay chain argument error: {}", err))?;

				cmd.run(config, polkadot_config)
			})
		}
		Some(Subcommand::Revert(cmd)) => {
			let runner = cli.create_runner(cmd)?;
			runner.async_run(|config| {
				let PartialComponents {
					client,
					task_manager,
					backend,
					..
				} = crate::service::new_partial(&config)?;
				Ok((cmd.run(client, backend), task_manager))
			})
		}
		Some(Subcommand::ExportGenesisState(params)) => {
			let mut builder = sc_cli::LoggerBuilder::new("");
			builder.with_profiling(sc_tracing::TracingReceiver::Log, "");
			let _ = builder.init();

			let block: Block = generate_genesis_block(&load_spec(
				&params.chain.clone().unwrap_or_default(),
				params.parachain_id.unwrap_or(200).into(),
			)?)?;
			let raw_header = block.header().encode();
			let output_buf = if params.raw {
				raw_header
			} else {
				format!("0x{:?}", HexDisplay::from(&block.header().encode())).into_bytes()
			};

			if let Some(output) = &params.output {
				std::fs::write(output, output_buf)?;
			} else {
				std::io::stdout().write_all(&output_buf)?;
			}

			Ok(())
		}
		Some(Subcommand::ExportGenesisWasm(params)) => {
			let mut builder = sc_cli::LoggerBuilder::new("");
			builder.with_profiling(sc_tracing::TracingReceiver::Log, "");
			let _ = builder.init();

			let raw_wasm_blob =
				extract_genesis_wasm(&cli.load_spec(&params.chain.clone().unwrap_or_default())?)?;
			let output_buf = if params.raw {
				raw_wasm_blob
			} else {
				format!("0x{:?}", HexDisplay::from(&raw_wasm_blob)).into_bytes()
			};

			if let Some(output) = &params.output {
				std::fs::write(output, output_buf)?;
			} else {
				std::io::stdout().write_all(&output_buf)?;
			}

			Ok(())
		}
		None => {
			let runner = cli.create_runner(&*cli.run)?;

			runner.run_node_until_exit(|config| async move {
				// TODO
				let key = sp_core::Pair::generate().0;

				let para_id =
					chain_spec::Extensions::try_get(&*config.chain_spec).map(|e| e.para_id);

				let polkadot_cli = RelayChainCli::new(
					&config,
					[RelayChainCli::executable_name().to_string()]
						.iter()
						.chain(cli.relaychain_args.iter()),
				);

				let id = ParaId::from(cli.run.parachain_id.or(para_id).unwrap_or(200));

				let parachain_account =
					AccountIdConversion::<polkadot_primitives::v0::AccountId>::into_account(&id);

				let block: Block =
					generate_genesis_block(&config.chain_spec).map_err(|e| format!("{:?}", e))?;
				let genesis_state = format!("0x{:?}", HexDisplay::from(&block.header().encode()));

				let task_executor = config.task_executor.clone();
				let polkadot_config = SubstrateCli::create_configuration(
					&polkadot_cli,
					&polkadot_cli,
					task_executor,
				)
				.map_err(|err| format!("Relay chain argument error: {}", err))?;
				let collator = cli.run.base.validator || cli.collator;

				info!("Parachain id: {:?}", id);
				info!("Parachain Account: {}", parachain_account);
				info!("Parachain genesis state: {}", genesis_state);
				info!("Is collating: {}", if collator { "yes" } else { "no" });

				crate::service::start_node(config, key, polkadot_config, id, collator)
					.await
					.map(|r| r.0)
					.map_err(Into::into)
			})
		}
	}
}

impl DefaultConfigurationValues for RelayChainCli {
	fn p2p_listen_port() -> u16 {
		30334
	}

	fn rpc_ws_listen_port() -> u16 {
		9945
	}

	fn rpc_http_listen_port() -> u16 {
		9934
	}

	fn prometheus_listen_port() -> u16 {
		9616
	}
}

impl CliConfiguration<Self> for RelayChainCli {
	fn shared_params(&self) -> &SharedParams {
		self.base.base.shared_params()
	}

	fn import_params(&self) -> Option<&ImportParams> {
		self.base.base.import_params()
	}

	fn network_params(&self) -> Option<&NetworkParams> {
		self.base.base.network_params()
	}

	fn keystore_params(&self) -> Option<&KeystoreParams> {
		self.base.base.keystore_params()
	}

	fn base_path(&self) -> Result<Option<BasePath>> {
		Ok(self
			.shared_params()
			.base_path()
			.or_else(|| self.base_path.clone().map(Into::into)))
	}

	fn rpc_http(&self, default_listen_port: u16) -> Result<Option<SocketAddr>> {
		self.base.base.rpc_http(default_listen_port)
	}

	fn rpc_ipc(&self) -> Result<Option<String>> {
		self.base.base.rpc_ipc()
	}

	fn rpc_ws(&self, default_listen_port: u16) -> Result<Option<SocketAddr>> {
		self.base.base.rpc_ws(default_listen_port)
	}

	fn prometheus_config(&self, default_listen_port: u16) -> Result<Option<PrometheusConfig>> {
		self.base.base.prometheus_config(default_listen_port)
	}

	fn init<C: SubstrateCli>(&self) -> Result<()> {
		unreachable!("PolkadotCli is never initialized; qed");
	}

	fn chain_id(&self, is_dev: bool) -> Result<String> {
		let chain_id = self.base.base.chain_id(is_dev)?;

		Ok(if chain_id.is_empty() {
			self.chain_id.clone().unwrap_or_default()
		} else {
			chain_id
		})
	}

	fn role(&self, is_dev: bool) -> Result<sc_service::Role> {
		self.base.base.role(is_dev)
	}

	fn transaction_pool(&self) -> Result<sc_service::config::TransactionPoolOptions> {
		self.base.base.transaction_pool()
	}

	fn state_cache_child_ratio(&self) -> Result<Option<usize>> {
		self.base.base.state_cache_child_ratio()
	}

	fn rpc_methods(&self) -> Result<sc_service::config::RpcMethods> {
		self.base.base.rpc_methods()
	}

	fn rpc_ws_max_connections(&self) -> Result<Option<usize>> {
		self.base.base.rpc_ws_max_connections()
	}

	fn rpc_cors(&self, is_dev: bool) -> Result<Option<Vec<String>>> {
		self.base.base.rpc_cors(is_dev)
	}

	fn telemetry_external_transport(&self) -> Result<Option<sc_service::config::ExtTransport>> {
		self.base.base.telemetry_external_transport()
	}

	fn default_heap_pages(&self) -> Result<Option<u64>> {
		self.base.base.default_heap_pages()
	}

	fn force_authoring(&self) -> Result<bool> {
		self.base.base.force_authoring()
	}

	fn disable_grandpa(&self) -> Result<bool> {
		self.base.base.disable_grandpa()
	}

	fn max_runtime_instances(&self) -> Result<Option<usize>> {
		self.base.base.max_runtime_instances()
	}

	fn announce_block(&self) -> Result<bool> {
		self.base.base.announce_block()
	}

	fn telemetry_endpoints(
		&self,
		chain_spec: &Box<dyn ChainSpec>,
	) -> Result<Option<sc_telemetry::TelemetryEndpoints>> {
		self.base.base.telemetry_endpoints(chain_spec)
	}
}
