// Copyright 2018-2019 Parity Technologies (UK) Ltd.
// This file is part of Substrate.

// Substrate 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.

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

//! Substrate chain configurations.

use primitives::{Pair, Public, crypto::UncheckedInto};
pub use node_primitives::{AccountId, Balance};
use node_runtime::{
	BabeConfig,	BalancesConfig, ContractsConfig, CouncilConfig, DemocracyConfig,
	ElectionsConfig, GrandpaConfig, ImOnlineConfig, IndicesConfig, Perbill,
	SessionConfig,	SessionKeys, StakerStatus, StakingConfig, SudoConfig, SystemConfig,
	TechnicalCommitteeConfig, WASM_BINARY,
};
use node_runtime::constants::{time::*, currency::*};
pub use node_runtime::GenesisConfig;
use substrate_service;
use hex_literal::hex;
use substrate_telemetry::TelemetryEndpoints;
use grandpa_primitives::{AuthorityId as GrandpaId};
use babe_primitives::{AuthorityId as BabeId};
use im_online::AuthorityId as ImOnlineId;

const STAGING_TELEMETRY_URL: &str = "wss://telemetry.polkadot.io/submit/";

/// Specialized `ChainSpec`.
pub type ChainSpec = substrate_service::ChainSpec<GenesisConfig>;

/// Flaming Fir testnet generator
pub fn flaming_fir_config() -> Result<ChainSpec, String> {
	ChainSpec::from_json_bytes(&include_bytes!("../res/flaming-fir.json")[..])
}

fn session_keys(grandpa: GrandpaId, babe: BabeId, im_online: ImOnlineId) -> SessionKeys {
	SessionKeys { grandpa, babe, im_online, }
}

fn staging_testnet_config_genesis() -> GenesisConfig {
	// stash, controller, session-key
	// generated with secret:
	// for i in 1 2 3 4 ; do for j in stash controller; do subkey inspect "$secret"/fir/$j/$i; done; done
	// and
	// for i in 1 2 3 4 ; do for j in session; do subkey --ed25519 inspect "$secret"//fir//$j//$i; done; done

	let initial_authorities: Vec<(AccountId, AccountId, GrandpaId, BabeId, ImOnlineId)> = vec![(
		// 5Fbsd6WXDGiLTxunqeK5BATNiocfCqu9bS1yArVjCgeBLkVy
		hex!["9c7a2ee14e565db0c69f78c7b4cd839fbf52b607d867e9e9c5a79042898a0d12"].unchecked_into(),
		// 5EnCiV7wSHeNhjW3FSUwiJNkcc2SBkPLn5Nj93FmbLtBjQUq
		hex!["781ead1e2fa9ccb74b44c19d29cb2a7a4b5be3972927ae98cd3877523976a276"].unchecked_into(),
		// 5EZaeQ8djPcq9pheJUhgerXQZt9YaHnMJpiHMRhwQeinqUW8
		hex!["6e7e4eb42cbd2e0ab4cae8708ce5509580b8c04d11f6758dbf686d50fe9f9106"].unchecked_into(),
		// 5Fb9ayurnxnaXj56CjmyQLBiadfRCqUbL2VWNbbe1nZU6wiC
		hex!["9becad03e6dcac03cee07edebca5475314861492cdfc96a2144a67bbe9699332"].unchecked_into(),
		// 5Fb9ayurnxnaXj56CjmyQLBiadfRCqUbL2VWNbbe1nZU6wiC
		hex!["9becad03e6dcac03cee07edebca5475314861492cdfc96a2144a67bbe9699332"].unchecked_into(),
	),(
		// 5ERawXCzCWkjVq3xz1W5KGNtVx2VdefvZ62Bw1FEuZW4Vny2
		hex!["68655684472b743e456907b398d3a44c113f189e56d1bbfd55e889e295dfde78"].unchecked_into(),
		// 5Gc4vr42hH1uDZc93Nayk5G7i687bAQdHHc9unLuyeawHipF
		hex!["c8dc79e36b29395413399edaec3e20fcca7205fb19776ed8ddb25d6f427ec40e"].unchecked_into(),
		// 5DhLtiaQd1L1LU9jaNeeu9HJkP6eyg3BwXA7iNMzKm7qqruQ
		hex!["482dbd7297a39fa145c570552249c2ca9dd47e281f0c500c971b59c9dcdcd82e"].unchecked_into(),
		// 5EockCXN6YkiNCDjpqqnbcqd4ad35nU4RmA1ikM4YeRN4WcE
		hex!["7932cff431e748892fa48e10c63c17d30f80ca42e4de3921e641249cd7fa3c2f"].unchecked_into(),
		// 5EockCXN6YkiNCDjpqqnbcqd4ad35nU4RmA1ikM4YeRN4WcE
		hex!["7932cff431e748892fa48e10c63c17d30f80ca42e4de3921e641249cd7fa3c2f"].unchecked_into(),
	),(
		// 5DyVtKWPidondEu8iHZgi6Ffv9yrJJ1NDNLom3X9cTDi98qp
		hex!["547ff0ab649283a7ae01dbc2eb73932eba2fb09075e9485ff369082a2ff38d65"].unchecked_into(),
		// 5FeD54vGVNpFX3PndHPXJ2MDakc462vBCD5mgtWRnWYCpZU9
		hex!["9e42241d7cd91d001773b0b616d523dd80e13c6c2cab860b1234ef1b9ffc1526"].unchecked_into(),
		// 5DhKqkHRkndJu8vq7pi2Q5S3DfftWJHGxbEUNH43b46qNspH
		hex!["482a3389a6cf42d8ed83888cfd920fec738ea30f97e44699ada7323f08c3380a"].unchecked_into(),
		// 5E1jLYfLdUQKrFrtqoKgFrRvxM3oQPMbf6DfcsrugZZ5Bn8d
		hex!["5633b70b80a6c8bb16270f82cca6d56b27ed7b76c8fd5af2986a25a4788ce440"].unchecked_into(),
		// 5E1jLYfLdUQKrFrtqoKgFrRvxM3oQPMbf6DfcsrugZZ5Bn8d
		hex!["5633b70b80a6c8bb16270f82cca6d56b27ed7b76c8fd5af2986a25a4788ce440"].unchecked_into(),
	),(
		// 5HYZnKWe5FVZQ33ZRJK1rG3WaLMztxWrrNDb1JRwaHHVWyP9
		hex!["f26cdb14b5aec7b2789fd5ca80f979cef3761897ae1f37ffb3e154cbcc1c2663"].unchecked_into(),
		// 5EPQdAQ39WQNLCRjWsCk5jErsCitHiY5ZmjfWzzbXDoAoYbn
		hex!["66bc1e5d275da50b72b15de072a2468a5ad414919ca9054d2695767cf650012f"].unchecked_into(),
		// 5C4vDQxA8LTck2xJEy4Yg1hM9qjDt4LvTQaMo4Y8ne43aU6x
		hex!["00299981a2b92f878baaf5dbeba5c18d4e70f2a1fcd9c61b32ea18daf38f4378"].unchecked_into(),
		// 5DMa31Hd5u1dwoRKgC4uvqyrdK45RHv3CpwvpUC1EzuwDit4
		hex!["3919132b851ef0fd2dae42a7e734fe547af5a6b809006100f48944d7fae8e8ef"].unchecked_into(),
		// 5DMa31Hd5u1dwoRKgC4uvqyrdK45RHv3CpwvpUC1EzuwDit4
		hex!["3919132b851ef0fd2dae42a7e734fe547af5a6b809006100f48944d7fae8e8ef"].unchecked_into(),
	)];

	// generated with secret: subkey inspect "$secret"/fir
	let endowed_accounts: Vec<AccountId> = vec![
		// 5Ff3iXP75ruzroPWRP2FYBHWnmGGBSb63857BgnzCoXNxfPo
		hex!["9ee5e5bdc0ec239eb164f865ecc345ce4c88e76ee002e0f7e318097347471809"].unchecked_into(),
	];

	const ENDOWMENT: Balance = 10_000_000 * DOLLARS;
	const STASH: Balance = 100 * DOLLARS;

	GenesisConfig {
		system: Some(SystemConfig {
			code: WASM_BINARY.to_vec(),
			changes_trie_config: Default::default(),
		}),
		balances: Some(BalancesConfig {
			balances: endowed_accounts.iter().cloned()
				.map(|k| (k, ENDOWMENT))
				.chain(initial_authorities.iter().map(|x| (x.0.clone(), STASH)))
				.collect(),
			vesting: vec![],
		}),
		indices: Some(IndicesConfig {
			ids: endowed_accounts.iter().cloned()
				.chain(initial_authorities.iter().map(|x| x.0.clone()))
				.collect::<Vec<_>>(),
		}),
		session: Some(SessionConfig {
			keys: initial_authorities.iter().map(|x| {
				(x.0.clone(), session_keys(x.2.clone(), x.3.clone(), x.4.clone()))
			}).collect::<Vec<_>>(),
		}),
		staking: Some(StakingConfig {
			current_era: 0,
			offline_slash: Perbill::from_parts(1_000_000),
			validator_count: 7,
			offline_slash_grace: 4,
			minimum_validator_count: 4,
			stakers: initial_authorities.iter().map(|x| {
				(x.0.clone(), x.1.clone(), STASH, StakerStatus::Validator)
			}).collect(),
			invulnerables: initial_authorities.iter().map(|x| x.0.clone()).collect(),
		}),
		democracy: Some(DemocracyConfig::default()),
		collective_Instance1: Some(CouncilConfig {
			members: vec![],
			phantom: Default::default(),
		}),
		collective_Instance2: Some(TechnicalCommitteeConfig {
			members: vec![],
			phantom: Default::default(),
		}),
		elections: Some(ElectionsConfig {
			members: vec![],
			presentation_duration: 1 * DAYS,
			term_duration: 28 * DAYS,
			desired_seats: 0,
		}),
		contracts: Some(ContractsConfig {
			current_schedule: Default::default(),
			gas_price: 1 * MILLICENTS,
		}),
		sudo: Some(SudoConfig {
			key: endowed_accounts[0].clone(),
		}),
		babe: Some(BabeConfig {
			authorities: initial_authorities.iter().map(|x| (x.3.clone(), 1)).collect(),
		}),
		im_online: Some(ImOnlineConfig {
			gossip_at: 0,
			keys: initial_authorities.iter().map(|x| x.4.clone()).collect(),
		}),
		grandpa: Some(GrandpaConfig {
			authorities: initial_authorities.iter().map(|x| (x.2.clone(), 1)).collect(),
		}),
		membership_Instance1: Some(Default::default()),
	}
}

/// Staging testnet config.
pub fn staging_testnet_config() -> ChainSpec {
	let boot_nodes = vec![];
	ChainSpec::from_genesis(
		"Staging Testnet",
		"staging_testnet",
		staging_testnet_config_genesis,
		boot_nodes,
		Some(TelemetryEndpoints::new(vec![(STAGING_TELEMETRY_URL.to_string(), 0)])),
		None,
		None,
		None,
	)
}

/// Helper function to generate a crypto pair from seed
pub fn get_from_seed<TPublic: Public>(seed: &str) -> <TPublic::Pair as Pair>::Public {
	TPublic::Pair::from_string(&format!("//{}", seed), None)
		.expect("static values are valid; qed")
		.public()
}


/// Helper function to generate stash, controller and session key from seed
pub fn get_authority_keys_from_seed(seed: &str) -> (AccountId, AccountId, GrandpaId, BabeId, ImOnlineId) {
	(
		get_from_seed::<AccountId>(&format!("{}//stash", seed)),
		get_from_seed::<AccountId>(seed),
		get_from_seed::<GrandpaId>(seed),
		get_from_seed::<BabeId>(seed),
		get_from_seed::<ImOnlineId>(seed),
	)
}

/// Helper function to create GenesisConfig for testing
pub fn testnet_genesis(
	initial_authorities: Vec<(AccountId, AccountId, GrandpaId, BabeId, ImOnlineId)>,
	root_key: AccountId,
	endowed_accounts: Option<Vec<AccountId>>,
	enable_println: bool,
) -> GenesisConfig {
	let endowed_accounts: Vec<AccountId> = endowed_accounts.unwrap_or_else(|| {
		vec![
			get_from_seed::<AccountId>("Alice"),
			get_from_seed::<AccountId>("Bob"),
			get_from_seed::<AccountId>("Charlie"),
			get_from_seed::<AccountId>("Dave"),
			get_from_seed::<AccountId>("Eve"),
			get_from_seed::<AccountId>("Ferdie"),
			get_from_seed::<AccountId>("Alice//stash"),
			get_from_seed::<AccountId>("Bob//stash"),
			get_from_seed::<AccountId>("Charlie//stash"),
			get_from_seed::<AccountId>("Dave//stash"),
			get_from_seed::<AccountId>("Eve//stash"),
			get_from_seed::<AccountId>("Ferdie//stash"),
		]
	});

	const ENDOWMENT: Balance = 10_000_000 * DOLLARS;
	const STASH: Balance = 100 * DOLLARS;

	let desired_seats = (endowed_accounts.len() / 2 - initial_authorities.len()) as u32;

	GenesisConfig {
		system: Some(SystemConfig {
			code: WASM_BINARY.to_vec(),
			changes_trie_config: Default::default(),
		}),
		indices: Some(IndicesConfig {
			ids: endowed_accounts.clone(),
		}),
		balances: Some(BalancesConfig {
			balances: endowed_accounts.iter().map(|k| (k.clone(), ENDOWMENT)).collect(),
			vesting: vec![],
		}),
		session: Some(SessionConfig {
			keys: initial_authorities.iter().map(|x| {
				(x.0.clone(), session_keys(x.2.clone(), x.3.clone(), x.4.clone()))
			}).collect::<Vec<_>>(),
		}),
		staking: Some(StakingConfig {
			current_era: 0,
			minimum_validator_count: 1,
			validator_count: 2,
			offline_slash: Perbill::zero(),
			offline_slash_grace: 0,
			stakers: initial_authorities.iter().map(|x| {
				(x.0.clone(), x.1.clone(), STASH, StakerStatus::Validator)
			}).collect(),
			invulnerables: initial_authorities.iter().map(|x| x.0.clone()).collect(),
		}),
		democracy: Some(DemocracyConfig::default()),
		collective_Instance1: Some(CouncilConfig {
			members: vec![],
			phantom: Default::default(),
		}),
		collective_Instance2: Some(TechnicalCommitteeConfig {
			members: vec![],
			phantom: Default::default(),
		}),
		elections: Some(ElectionsConfig {
			members: endowed_accounts.iter()
				.filter(|&endowed| initial_authorities.iter().find(|&(_, controller, ..)| controller == endowed).is_none())
				.map(|a| (a.clone(), 1000000)).collect(),
			presentation_duration: 10,
			term_duration: 1000000,
			desired_seats: desired_seats,
		}),
		contracts: Some(ContractsConfig {
			current_schedule: contracts::Schedule {
				enable_println, // this should only be enabled on development chains
				..Default::default()
			},
			gas_price: 1 * MILLICENTS,
		}),
		sudo: Some(SudoConfig {
			key: root_key,
		}),
		babe: Some(BabeConfig {
			authorities: initial_authorities.iter().map(|x| (x.3.clone(), 1)).collect(),
		}),
		im_online: Some(ImOnlineConfig{
			gossip_at: 0,
			keys: initial_authorities.iter().map(|x| x.4.clone()).collect(),
		}),
		grandpa: Some(GrandpaConfig {
			authorities: initial_authorities.iter().map(|x| (x.2.clone(), 1)).collect(),
		}),
		membership_Instance1: Some(Default::default()),
	}
}

fn development_config_genesis() -> GenesisConfig {
	testnet_genesis(
		vec![
			get_authority_keys_from_seed("Alice"),
		],
		get_from_seed::<AccountId>("Alice"),
		None,
		true,
	)
}

/// Development config (single validator Alice)
pub fn development_config() -> ChainSpec {
	ChainSpec::from_genesis("Development", "dev", development_config_genesis, vec![], None, None, None, None)
}

fn local_testnet_genesis() -> GenesisConfig {
	testnet_genesis(
		vec![
			get_authority_keys_from_seed("Alice"),
			get_authority_keys_from_seed("Bob"),
		],
		get_from_seed::<AccountId>("Alice"),
		None,
		false,
	)
}

/// Local testnet config (multivalidator Alice + Bob)
pub fn local_testnet_config() -> ChainSpec {
	ChainSpec::from_genesis("Local Testnet", "local_testnet", local_testnet_genesis, vec![], None, None, None, None)
}

#[cfg(test)]
pub(crate) mod tests {
	use super::*;
	use service_test;
	use crate::service::Factory;

	fn local_testnet_genesis_instant_single() -> GenesisConfig {
		testnet_genesis(
			vec![
				get_authority_keys_from_seed("Alice"),
			],
			get_from_seed::<AccountId>("Alice"),
			None,
			false,
		)
	}

	/// Local testnet config (single validator - Alice)
	pub fn integration_test_config_with_single_authority() -> ChainSpec {
		ChainSpec::from_genesis(
			"Integration Test",
			"test",
			local_testnet_genesis_instant_single,
			vec![],
			None,
			None,
			None,
			None,
		)
	}

	/// Local testnet config (multivalidator Alice + Bob)
	pub fn integration_test_config_with_two_authorities() -> ChainSpec {
		ChainSpec::from_genesis(
			"Integration Test",
			"test",
			local_testnet_genesis,
			vec![],
			None,
			None,
			None,
			None,
		)
	}

	#[test]
	#[ignore]
	fn test_connectivity() {
		service_test::connectivity::<Factory>(integration_test_config_with_two_authorities());
	}
}