use std::net::SocketAddr;

use cumulus_primitives_core::ParaId;
use log::info;
use sc_cli::{
    ChainSpec, CliConfiguration, DefaultConfigurationValues, ImportParams, KeystoreParams,
    NetworkParams, Result, SharedParams, SubstrateCli,
};
use sc_service::config::{BasePath, PrometheusConfig};
use sp_runtime::traits::AccountIdConversion;

use crate::{
    chain_spec,
    cli::{Cli, RelayChainCli, Subcommand},
    dev_service::new_dev,
    service::new_partial,
};

fn load_spec(id: &str) -> std::result::Result<Box<dyn ChainSpec>, String> {
    Ok(match id {
        "dev" => Box::new(chain_spec::development_config()?),
        "template-rococo" => Box::new(chain_spec::local_testnet_config()?),
        "" | "local" => Box::new(chain_spec::local_testnet_config()?),
        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 relay chain node.\n\n\
		{} <parachain-args> -- <relay-chain-args>",
            Self::executable_name()
        )
    }

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

    fn support_url() -> String {
        "https://github.com/paritytech/cumulus/issues/new".into()
    }

    fn copyright_start_year() -> i32 {
        2020
    }

    fn load_spec(&self, id: &str) -> std::result::Result<Box<dyn sc_service::ChainSpec>, String> {
        load_spec(id)
    }
}

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 {
        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 relay chain node.\n\n\
		{} <parachain-args> -- <relay-chain-args>",
            Self::executable_name()
        )
    }

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

    fn support_url() -> String {
        "https://github.com/paritytech/cumulus/issues/new".into()
    }

    fn copyright_start_year() -> i32 {
        2020
    }

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

macro_rules! construct_async_run {
	(|$components:ident, $cli:ident, $cmd:ident, $config:ident| $( $code:tt )* ) => {{
		let runner = $cli.create_runner($cmd)?;
		runner.async_run(|$config| {
			let $components = new_partial(&$config)?;
			let task_manager = $components.task_manager;
			{ $( $code )* }.map(|v| (v, task_manager))
		})
	}}
}

/// 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)) => {
            construct_async_run!(|components, cli, cmd, config| {
                Ok(cmd.run(components.client, components.import_queue))
            })
        }
        Some(Subcommand::ExportBlocks(cmd)) => {
            construct_async_run!(|components, cli, cmd, config| {
                Ok(cmd.run(components.client, config.database))
            })
        }
        Some(Subcommand::ExportState(cmd)) => {
            construct_async_run!(|components, cli, cmd, config| {
                Ok(cmd.run(components.client, config.chain_spec))
            })
        }
        Some(Subcommand::ImportBlocks(cmd)) => {
            construct_async_run!(|components, cli, cmd, config| {
                Ok(cmd.run(components.client, components.import_queue))
            })
        }
        Some(Subcommand::Revert(cmd)) => {
            construct_async_run!(|components, cli, cmd, config| {
                Ok(cmd.run(components.client, components.backend, None))
            })
        }
        Some(Subcommand::PurgeChain(cmd)) => {
            let runner = cli.create_runner(cmd)?;

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

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

                cmd.run(config, polkadot_config)
            })
        }
        Some(Subcommand::ExportGenesisState(cmd)) | Some(Subcommand::ExportGenesisHead(cmd)) => {
            let runner = cli.create_runner(cmd)?;
            runner.sync_run(|config| {
                let partials = new_partial(&config)?;

                cmd.run(partials.client)
            })
        }
        Some(Subcommand::ExportGenesisWasm(cmd)) => {
            let runner = cli.create_runner(cmd)?;
            runner.sync_run(|_config| {
                let spec = cli.load_spec(&cmd.shared_params.chain.clone().unwrap_or_default())?;
                cmd.run(&*spec)
            })
        }
        None => {
            let runner = cli.create_runner(&cli.run.normalize())?;
            let collator_options = cli.run.collator_options();

            runner.run_node_until_exit(|config| async move {
                // This is where we detect and enable the development service.
                // For now it can ONLY be used for --dev. If we later desire more
                // flexibility, we could take inspiration from:
                // https://github.com/moonbeam-foundation/moonbeam/pull/260
                if cli.run.base.shared_params.dev {
                    return new_dev(config).map_err(sc_cli::Error::Service);
                }

                let hwbench = (!cli.no_hardware_benchmarks)
                    .then_some(config.database.path().map(|database_path| {
                        let _ = std::fs::create_dir_all(database_path);
                        sc_sysinfo::gather_hwbench(Some(database_path))
                    }))
                    .flatten();

                let para_id = chain_spec::Extensions::try_get(&*config.chain_spec)
                    .map(|e| e.para_id)
                    .ok_or("Could not find parachain ID in chain-spec.")?;

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

                let id = ParaId::from(para_id);

                let parachain_account =
                    AccountIdConversion::<polkadot_primitives::AccountId>::into_account_truncating(
                        &id,
                    );

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

                info!("Parachain Account: {parachain_account}");
                info!(
                    "Is collating: {}",
                    if config.role.is_authority() {
                        "yes"
                    } else {
                        "no"
                    }
                );
                info!("Client-side ParaId from chain spec: {para_id}");

                crate::service::start_parachain_node(
                    config,
                    polkadot_config,
                    collator_options,
                    id,
                    hwbench,
                )
                .await
                .map(|r| r.0)
                .map_err(Into::into)
            })
        }
    }
}

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

    fn rpc_listen_port() -> u16 {
        9945
    }

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

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

    fn init<F>(
        &self,
        _support_url: &String,
        _impl_version: &String,
        _logger_hook: F,
        _config: &sc_service::Configuration,
    ) -> Result<()>
    where
        F: FnOnce(&mut sc_cli::LoggerBuilder, &sc_service::Configuration),
    {
        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, is_dev: bool) -> Result<sc_service::config::TransactionPoolOptions> {
        self.base.base.transaction_pool(is_dev)
    }

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

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

    fn rpc_max_connections(&self) -> Result<u32> {
        self.base.base.rpc_max_connections()
    }

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

    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)
    }

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