// Copyright (C) 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/>.

#![cfg(test)]

use bp_polkadot_core::Signature;
use bridge_common_config::{DeliveryRewardInBalance, RequiredStakeForStakeAndSlash};
use bridge_hub_test_utils::{test_cases::from_parachain, SlotDurations};
use bridge_hub_westend_runtime::{
	bridge_common_config, bridge_to_rococo_config,
	xcm_config::{RelayNetwork, WestendLocation, XcmConfig},
	AllPalletsWithoutSystem, BridgeRejectObsoleteHeadersAndMessages, Executive, ExistentialDeposit,
	ParachainSystem, PolkadotXcm, Runtime, RuntimeCall, RuntimeEvent, RuntimeOrigin, SessionKeys,
	TransactionPayment, TxExtension, UncheckedExtrinsic,
};
use bridge_to_rococo_config::{
	BridgeGrandpaRococoInstance, BridgeHubRococoChainId, BridgeHubRococoLocation,
	BridgeParachainRococoInstance, WithBridgeHubRococoMessageBridge,
	WithBridgeHubRococoMessagesInstance, XCM_LANE_FOR_ASSET_HUB_WESTEND_TO_ASSET_HUB_ROCOCO,
};
use codec::{Decode, Encode};
use frame_support::{dispatch::GetDispatchInfo, parameter_types, traits::ConstU8};
use parachains_common::{AccountId, AuraId, Balance};
use sp_consensus_aura::SlotDuration;
use sp_keyring::AccountKeyring::Alice;
use sp_runtime::{
	generic::{Era, SignedPayload},
	AccountId32, Perbill,
};
use testnet_parachains_constants::westend::{consensus::*, fee::WeightToFee};
use xcm::latest::prelude::*;

// Para id of sibling chain used in tests.
pub const SIBLING_PARACHAIN_ID: u32 = 1000;

// Runtime from tests PoV
type RuntimeTestsAdapter = from_parachain::WithRemoteParachainHelperAdapter<
	Runtime,
	AllPalletsWithoutSystem,
	BridgeGrandpaRococoInstance,
	BridgeParachainRococoInstance,
	WithBridgeHubRococoMessagesInstance,
	WithBridgeHubRococoMessageBridge,
>;

parameter_types! {
	pub CheckingAccount: AccountId = PolkadotXcm::check_account();
}

fn construct_extrinsic(
	sender: sp_keyring::AccountKeyring,
	call: RuntimeCall,
) -> UncheckedExtrinsic {
	let account_id = AccountId32::from(sender.public());
	let tx_ext: TxExtension = (
		frame_system::CheckNonZeroSender::<Runtime>::new(),
		frame_system::CheckSpecVersion::<Runtime>::new(),
		frame_system::CheckTxVersion::<Runtime>::new(),
		frame_system::CheckGenesis::<Runtime>::new(),
		frame_system::CheckEra::<Runtime>::from(Era::immortal()),
		frame_system::CheckNonce::<Runtime>::from(
			frame_system::Pallet::<Runtime>::account(&account_id).nonce,
		),
		frame_system::CheckWeight::<Runtime>::new(),
		pallet_transaction_payment::ChargeTransactionPayment::<Runtime>::from(0),
		BridgeRejectObsoleteHeadersAndMessages::default(),
		(bridge_to_rococo_config::OnBridgeHubWestendRefundBridgeHubRococoMessages::default(),),
	)
		.into();
	let payload = SignedPayload::new(call.clone(), tx_ext.clone()).unwrap();
	let signature = payload.using_encoded(|e| sender.sign(e));
	UncheckedExtrinsic::new_signed(
		call,
		account_id.into(),
		Signature::Sr25519(signature.clone()),
		tx_ext,
	)
}

fn construct_and_apply_extrinsic(
	relayer_at_target: sp_keyring::AccountKeyring,
	call: RuntimeCall,
) -> sp_runtime::DispatchOutcome {
	let xt = construct_extrinsic(relayer_at_target, call);
	let r = Executive::apply_extrinsic(xt);
	r.unwrap()
}

fn construct_and_estimate_extrinsic_fee(batch: pallet_utility::Call<Runtime>) -> Balance {
	let batch_call = RuntimeCall::Utility(batch);
	let batch_info = batch_call.get_dispatch_info();
	let xt = construct_extrinsic(Alice, batch_call);
	TransactionPayment::compute_fee(xt.encoded_size() as _, &batch_info, 0)
}

fn collator_session_keys() -> bridge_hub_test_utils::CollatorSessionKeys<Runtime> {
	bridge_hub_test_utils::CollatorSessionKeys::new(
		AccountId::from(Alice),
		AccountId::from(Alice),
		SessionKeys { aura: AuraId::from(Alice.public()) },
	)
}

fn slot_durations() -> SlotDurations {
	SlotDurations {
		relay: SlotDuration::from_millis(RELAY_CHAIN_SLOT_DURATION_MILLIS.into()),
		para: SlotDuration::from_millis(SLOT_DURATION),
	}
}

bridge_hub_test_utils::test_cases::include_teleports_for_native_asset_works!(
	Runtime,
	AllPalletsWithoutSystem,
	XcmConfig,
	CheckingAccount,
	WeightToFee,
	ParachainSystem,
	collator_session_keys(),
	slot_durations(),
	ExistentialDeposit::get(),
	Box::new(|runtime_event_encoded: Vec<u8>| {
		match RuntimeEvent::decode(&mut &runtime_event_encoded[..]) {
			Ok(RuntimeEvent::PolkadotXcm(event)) => Some(event),
			_ => None,
		}
	}),
	bp_bridge_hub_westend::BRIDGE_HUB_WESTEND_PARACHAIN_ID
);

#[test]
fn initialize_bridge_by_governance_works() {
	bridge_hub_test_utils::test_cases::initialize_bridge_by_governance_works::<
		Runtime,
		BridgeGrandpaRococoInstance,
	>(collator_session_keys(), bp_bridge_hub_westend::BRIDGE_HUB_WESTEND_PARACHAIN_ID)
}

#[test]
fn change_bridge_grandpa_pallet_mode_by_governance_works() {
	bridge_hub_test_utils::test_cases::change_bridge_grandpa_pallet_mode_by_governance_works::<
		Runtime,
		BridgeGrandpaRococoInstance,
	>(collator_session_keys(), bp_bridge_hub_westend::BRIDGE_HUB_WESTEND_PARACHAIN_ID)
}

#[test]
fn change_bridge_parachains_pallet_mode_by_governance_works() {
	bridge_hub_test_utils::test_cases::change_bridge_parachains_pallet_mode_by_governance_works::<
		Runtime,
		BridgeParachainRococoInstance,
	>(collator_session_keys(), bp_bridge_hub_westend::BRIDGE_HUB_WESTEND_PARACHAIN_ID)
}

#[test]
fn change_bridge_messages_pallet_mode_by_governance_works() {
	bridge_hub_test_utils::test_cases::change_bridge_messages_pallet_mode_by_governance_works::<
		Runtime,
		WithBridgeHubRococoMessagesInstance,
	>(collator_session_keys(), bp_bridge_hub_westend::BRIDGE_HUB_WESTEND_PARACHAIN_ID)
}

#[test]
fn change_delivery_reward_by_governance_works() {
	bridge_hub_test_utils::test_cases::change_storage_constant_by_governance_works::<
		Runtime,
		DeliveryRewardInBalance,
		u64,
	>(
		collator_session_keys(),
		bp_bridge_hub_westend::BRIDGE_HUB_WESTEND_PARACHAIN_ID,
		Box::new(|call| RuntimeCall::System(call).encode()),
		|| (DeliveryRewardInBalance::key().to_vec(), DeliveryRewardInBalance::get()),
		|old_value| old_value.checked_mul(2).unwrap(),
	)
}

#[test]
fn change_required_stake_by_governance_works() {
	bridge_hub_test_utils::test_cases::change_storage_constant_by_governance_works::<
		Runtime,
		RequiredStakeForStakeAndSlash,
		Balance,
	>(
		collator_session_keys(),
		bp_bridge_hub_westend::BRIDGE_HUB_WESTEND_PARACHAIN_ID,
		Box::new(|call| RuntimeCall::System(call).encode()),
		|| (RequiredStakeForStakeAndSlash::key().to_vec(), RequiredStakeForStakeAndSlash::get()),
		|old_value| old_value.checked_mul(2).unwrap(),
	)
}

#[test]
fn handle_export_message_from_system_parachain_add_to_outbound_queue_works() {
	bridge_hub_test_utils::test_cases::handle_export_message_from_system_parachain_to_outbound_queue_works::<
			Runtime,
			XcmConfig,
			WithBridgeHubRococoMessagesInstance,
		>(
			collator_session_keys(),
			bp_bridge_hub_westend::BRIDGE_HUB_WESTEND_PARACHAIN_ID,
			SIBLING_PARACHAIN_ID,
			Box::new(|runtime_event_encoded: Vec<u8>| {
				match RuntimeEvent::decode(&mut &runtime_event_encoded[..]) {
					Ok(RuntimeEvent::BridgeRococoMessages(event)) => Some(event),
					_ => None,
				}
			}),
			|| ExportMessage { network: Rococo, destination: [Parachain(bridge_to_rococo_config::AssetHubRococoParaId::get().into())].into(), xcm: Xcm(vec![]) },
			XCM_LANE_FOR_ASSET_HUB_WESTEND_TO_ASSET_HUB_ROCOCO,
			Some((WestendLocation::get(), ExistentialDeposit::get()).into()),
			// value should be >= than value generated by `can_calculate_weight_for_paid_export_message_with_reserve_transfer`
			Some((WestendLocation::get(), bp_bridge_hub_westend::BridgeHubWestendBaseXcmFeeInWnds::get()).into()),
			|| PolkadotXcm::force_xcm_version(RuntimeOrigin::root(), Box::new(BridgeHubRococoLocation::get()), XCM_VERSION).expect("version saved!"),
		)
}

#[test]
fn message_dispatch_routing_works() {
	bridge_hub_test_utils::test_cases::message_dispatch_routing_works::<
		Runtime,
		AllPalletsWithoutSystem,
		XcmConfig,
		ParachainSystem,
		WithBridgeHubRococoMessagesInstance,
		RelayNetwork,
		bridge_to_rococo_config::RococoGlobalConsensusNetwork,
		ConstU8<2>,
	>(
		collator_session_keys(),
		slot_durations(),
		bp_bridge_hub_westend::BRIDGE_HUB_WESTEND_PARACHAIN_ID,
		SIBLING_PARACHAIN_ID,
		Box::new(|runtime_event_encoded: Vec<u8>| {
			match RuntimeEvent::decode(&mut &runtime_event_encoded[..]) {
				Ok(RuntimeEvent::ParachainSystem(event)) => Some(event),
				_ => None,
			}
		}),
		Box::new(|runtime_event_encoded: Vec<u8>| {
			match RuntimeEvent::decode(&mut &runtime_event_encoded[..]) {
				Ok(RuntimeEvent::XcmpQueue(event)) => Some(event),
				_ => None,
			}
		}),
		XCM_LANE_FOR_ASSET_HUB_WESTEND_TO_ASSET_HUB_ROCOCO,
		|| (),
	)
}

#[test]
fn relayed_incoming_message_works() {
	from_parachain::relayed_incoming_message_works::<RuntimeTestsAdapter>(
		collator_session_keys(),
		slot_durations(),
		bp_bridge_hub_westend::BRIDGE_HUB_WESTEND_PARACHAIN_ID,
		bp_bridge_hub_rococo::BRIDGE_HUB_ROCOCO_PARACHAIN_ID,
		BridgeHubRococoChainId::get(),
		SIBLING_PARACHAIN_ID,
		Westend,
		XCM_LANE_FOR_ASSET_HUB_WESTEND_TO_ASSET_HUB_ROCOCO,
		|| (),
		construct_and_apply_extrinsic,
	)
}

#[test]
pub fn complex_relay_extrinsic_works() {
	from_parachain::complex_relay_extrinsic_works::<RuntimeTestsAdapter>(
		collator_session_keys(),
		slot_durations(),
		bp_bridge_hub_westend::BRIDGE_HUB_WESTEND_PARACHAIN_ID,
		bp_bridge_hub_rococo::BRIDGE_HUB_ROCOCO_PARACHAIN_ID,
		SIBLING_PARACHAIN_ID,
		BridgeHubRococoChainId::get(),
		Westend,
		XCM_LANE_FOR_ASSET_HUB_WESTEND_TO_ASSET_HUB_ROCOCO,
		|| (),
		construct_and_apply_extrinsic,
	);
}

#[test]
pub fn can_calculate_weight_for_paid_export_message_with_reserve_transfer() {
	bridge_hub_test_utils::check_sane_fees_values(
		"bp_bridge_hub_westend::BridgeHubWestendBaseXcmFeeInWnds",
		bp_bridge_hub_westend::BridgeHubWestendBaseXcmFeeInWnds::get(),
		|| {
			bridge_hub_test_utils::test_cases::can_calculate_weight_for_paid_export_message_with_reserve_transfer::<
			Runtime,
			XcmConfig,
			WeightToFee,
		>()
		},
		Perbill::from_percent(33),
		Some(-33),
		&format!(
			"Estimate fee for `ExportMessage` for runtime: {:?}",
			<Runtime as frame_system::Config>::Version::get()
		),
	)
}

#[test]
pub fn can_calculate_fee_for_complex_message_delivery_transaction() {
	bridge_hub_test_utils::check_sane_fees_values(
		"bp_bridge_hub_westend::BridgeHubWestendBaseDeliveryFeeInWnds",
		bp_bridge_hub_westend::BridgeHubWestendBaseDeliveryFeeInWnds::get(),
		|| {
			from_parachain::can_calculate_fee_for_complex_message_delivery_transaction::<
				RuntimeTestsAdapter,
			>(collator_session_keys(), construct_and_estimate_extrinsic_fee)
		},
		Perbill::from_percent(33),
		Some(-33),
		&format!(
			"Estimate fee for `single message delivery` for runtime: {:?}",
			<Runtime as frame_system::Config>::Version::get()
		),
	)
}

#[test]
pub fn can_calculate_fee_for_complex_message_confirmation_transaction() {
	bridge_hub_test_utils::check_sane_fees_values(
		"bp_bridge_hub_westend::BridgeHubWestendBaseConfirmationFeeInWnds",
		bp_bridge_hub_westend::BridgeHubWestendBaseConfirmationFeeInWnds::get(),
		|| {
			from_parachain::can_calculate_fee_for_complex_message_confirmation_transaction::<
				RuntimeTestsAdapter,
			>(collator_session_keys(), construct_and_estimate_extrinsic_fee)
		},
		Perbill::from_percent(33),
		Some(-33),
		&format!(
			"Estimate fee for `single message confirmation` for runtime: {:?}",
			<Runtime as frame_system::Config>::Version::get()
		),
	)
}