// 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/>.

#![cfg(test)]

use crate as pezpallet_xcm_bridge_hub;

use bp_messages::{
	target_chain::{DispatchMessage, MessageDispatch},
	ChainWithMessages, HashedLaneId, MessageNonce,
};
use bp_xcm_bridge_hub::{BridgeId, LocalXcmChannelManager};
use codec::{Decode, Encode};
use pezbp_runtime::{messages::MessageDispatchResult, Chain, ChainId, HashOf};
use pezframe_support::{
	assert_ok, derive_impl, parameter_types,
	traits::{EnsureOrigin, Equals, Everything, Get, OriginTrait},
	weights::RuntimeDbWeight,
};
use pezkuwi_teyrchain_primitives::primitives::Sibling;
use pezsp_core::H256;
use pezsp_runtime::{
	testing::Header as BizinikiwiHeader,
	traits::{BlakeTwo256, ConstU128, ConstU32, IdentityLookup},
	AccountId32, BuildStorage, StateVersion,
};
use pezsp_std::cell::RefCell;
use xcm::{latest::PEZKUWICHAIN_GENESIS_HASH, prelude::*};
use xcm_builder::{
	AllowUnpaidExecutionFrom, DispatchBlob, DispatchBlobError, FixedWeightBounds,
	InspectMessageQueues, NetworkExportTable, NetworkExportTableItem, ParentIsPreset,
	SiblingTeyrchainConvertsVia,
};
use xcm_executor::{traits::ConvertOrigin, XcmExecutor};

pub type AccountId = AccountId32;
pub type Balance = u64;
type Block = pezframe_system::mocking::MockBlock<TestRuntime>;

/// Lane identifier type used for tests.
pub type TestLaneIdType = HashedLaneId;

pub const SIBLING_ASSET_HUB_ID: u32 = 2001;
pub const THIS_BRIDGE_HUB_ID: u32 = 2002;
pub const BRIDGED_ASSET_HUB_ID: u32 = 1001;

pezframe_support::construct_runtime! {
	pub enum TestRuntime {
		System: pezframe_system::{Pezpallet, Call, Config<T>, Storage, Event<T>},
		Balances: pezpallet_balances::{Pezpallet, Event<T>},
		Messages: pezpallet_bridge_messages::{Pezpallet, Call, Event<T>},
		XcmOverBridge: pezpallet_xcm_bridge_hub::{Pezpallet, Call, HoldReason, Event<T>},
		XcmOverBridgeWrappedWithExportMessageRouter: pezpallet_xcm_bridge_hub_router = 57,
	}
}

parameter_types! {
	pub const DbWeight: RuntimeDbWeight = RuntimeDbWeight { read: 1, write: 2 };
	pub const ExistentialDeposit: Balance = 1;
}

#[derive_impl(pezframe_system::config_preludes::TestDefaultConfig)]
impl pezframe_system::Config for TestRuntime {
	type AccountId = AccountId;
	type AccountData = pezpallet_balances::AccountData<Balance>;
	type Block = Block;
	type Lookup = IdentityLookup<Self::AccountId>;
}

#[derive_impl(pezpallet_balances::config_preludes::TestDefaultConfig)]
impl pezpallet_balances::Config for TestRuntime {
	type AccountStore = System;
}

impl pezpallet_bridge_messages::Config for TestRuntime {
	type RuntimeEvent = RuntimeEvent;
	type WeightInfo = TestMessagesWeights;

	type ThisChain = ThisUnderlyingChain;
	type BridgedChain = BridgedUnderlyingChain;
	type BridgedHeaderChain = BridgedHeaderChain;

	type OutboundPayload = Vec<u8>;
	type InboundPayload = Vec<u8>;
	type LaneId = TestLaneIdType;

	type DeliveryPayments = ();
	type DeliveryConfirmationPayments = ();
	type OnMessagesDelivered = ();

	type MessageDispatch = TestMessageDispatch;
}

pub struct TestMessagesWeights;

impl pezpallet_bridge_messages::WeightInfo for TestMessagesWeights {
	fn receive_single_message_proof() -> Weight {
		Weight::zero()
	}
	fn receive_n_messages_proof(_: u32) -> Weight {
		Weight::zero()
	}
	fn receive_single_message_proof_with_outbound_lane_state() -> Weight {
		Weight::zero()
	}
	fn receive_single_n_bytes_message_proof(_: u32) -> Weight {
		Weight::zero()
	}
	fn receive_delivery_proof_for_single_message() -> Weight {
		Weight::zero()
	}
	fn receive_delivery_proof_for_two_messages_by_single_relayer() -> Weight {
		Weight::zero()
	}
	fn receive_delivery_proof_for_two_messages_by_two_relayers() -> Weight {
		Weight::zero()
	}
	fn receive_single_n_bytes_message_proof_with_dispatch(_n: u32) -> Weight {
		Weight::from_parts(1, 0)
	}
}

impl pezpallet_bridge_messages::WeightInfoExt for TestMessagesWeights {
	fn expected_extra_storage_proof_size() -> u32 {
		0
	}

	fn receive_messages_proof_overhead_from_runtime() -> Weight {
		Weight::zero()
	}

	fn receive_messages_delivery_proof_overhead_from_runtime() -> Weight {
		Weight::zero()
	}
}

parameter_types! {
	pub const RelayNetwork: NetworkId = NetworkId::Kusama;
	pub UniversalLocation: InteriorLocation = [
		GlobalConsensus(RelayNetwork::get()),
		Teyrchain(THIS_BRIDGE_HUB_ID),
	].into();
	pub SiblingLocation: Location = Location::new(1, [Teyrchain(SIBLING_ASSET_HUB_ID)]);
	pub SiblingUniversalLocation: InteriorLocation = [GlobalConsensus(RelayNetwork::get()), Teyrchain(SIBLING_ASSET_HUB_ID)].into();

	pub const BridgedRelayNetwork: NetworkId = NetworkId::ByGenesis([1; 32]);
	pub BridgedRelayNetworkLocation: Location = (Parent, GlobalConsensus(BridgedRelayNetwork::get())).into();
	pub BridgedRelativeDestination: InteriorLocation = [Teyrchain(BRIDGED_ASSET_HUB_ID)].into();
	pub BridgedUniversalDestination: InteriorLocation = [GlobalConsensus(BridgedRelayNetwork::get()), Teyrchain(BRIDGED_ASSET_HUB_ID)].into();
	pub const NonBridgedRelayNetwork: NetworkId = NetworkId::ByGenesis(PEZKUWICHAIN_GENESIS_HASH);

	pub const BridgeDeposit: Balance = 100_000;

	// configuration for pezpallet_xcm_bridge_hub_router
	pub BridgeHubLocation: Location = Here.into();
	pub BridgeFeeAsset: AssetId = Location::here().into();
	pub BridgeTable: Vec<NetworkExportTableItem>
		= vec![
			NetworkExportTableItem::new(
				BridgedRelayNetwork::get(),
				None,
				BridgeHubLocation::get(),
				None
			)
		];
	pub UnitWeightCost: Weight = Weight::from_parts(10, 10);
}

/// **Universal** `InteriorLocation` of bridged asset hub.
pub fn bridged_asset_hub_universal_location() -> InteriorLocation {
	BridgedUniversalDestination::get()
}

impl pezpallet_xcm_bridge_hub::Config for TestRuntime {
	type RuntimeEvent = RuntimeEvent;

	type UniversalLocation = UniversalLocation;
	type BridgedNetwork = BridgedRelayNetworkLocation;
	type BridgeMessagesPalletInstance = ();

	type MessageExportPrice = ();
	type DestinationVersion = AlwaysLatest;

	type ForceOrigin = pezframe_system::EnsureNever<()>;
	type OpenBridgeOrigin = OpenBridgeOrigin;
	type BridgeOriginAccountIdConverter = LocationToAccountId;

	type BridgeDeposit = BridgeDeposit;
	type Currency = Balances;
	type RuntimeHoldReason = RuntimeHoldReason;
	type AllowWithoutBridgeDeposit = Equals<ParentRelayChainLocation>;

	type LocalXcmChannelManager = TestLocalXcmChannelManager;

	type BlobDispatcher = TestBlobDispatcher;
}

/// A router instance simulates a scenario where the router is deployed on a different chain than
/// the `MessageExporter`. This means that the router sends an `ExportMessage`.
pub type XcmOverBridgeWrappedWithExportMessageRouterInstance = ();
impl pezpallet_xcm_bridge_hub_router::Config<XcmOverBridgeWrappedWithExportMessageRouterInstance>
	for TestRuntime
{
	type RuntimeEvent = RuntimeEvent;
	type WeightInfo = ();

	type UniversalLocation = ExportMessageOriginUniversalLocation;
	type SiblingBridgeHubLocation = BridgeHubLocation;
	type BridgedNetworkId = BridgedRelayNetwork;
	type Bridges = NetworkExportTable<BridgeTable>;
	type DestinationVersion = AlwaysLatest;

	// We convert to root `here` location with `BridgeHubLocationXcmOriginAsRoot`
	type BridgeHubOrigin = pezframe_system::EnsureRoot<AccountId>;
	// **Note**: The crucial part is that `ExportMessage` is processed by `XcmExecutor`, which
	// calls the `ExportXcm` implementation of `pezpallet_xcm_bridge_hub` as the
	// `MessageExporter`.
	type ToBridgeHubSender = ExecuteXcmOverSendXcm;
	type LocalXcmChannelManager = TestLocalXcmChannelManager;

	type ByteFee = ConstU128<0>;
	type FeeAsset = BridgeFeeAsset;
}

pub struct XcmConfig;
impl xcm_executor::Config for XcmConfig {
	type RuntimeCall = RuntimeCall;
	type XcmSender = ();
	type XcmEventEmitter = ();
	type AssetTransactor = ();
	type OriginConverter = BridgeHubLocationXcmOriginAsRoot<RuntimeOrigin>;
	type IsReserve = ();
	type IsTeleporter = ();
	type UniversalLocation = UniversalLocation;
	type Barrier = AllowUnpaidExecutionFrom<Everything>;
	type Weigher = FixedWeightBounds<UnitWeightCost, RuntimeCall, ConstU32<100>>;
	type Trader = ();
	type ResponseHandler = ();
	type AssetTrap = ();
	type AssetClaims = ();
	type SubscriptionService = ();
	type PalletInstancesInfo = ();
	type MaxAssetsIntoHolding = ();
	type AssetLocker = ();
	type AssetExchanger = ();
	type FeeManager = ();
	// We just set `MessageExporter` as our `pezpallet_xcm_bridge_hub` instance.
	type MessageExporter = (XcmOverBridge,);
	type UniversalAliases = ();
	type CallDispatcher = RuntimeCall;
	type SafeCallFilter = Everything;
	type Aliasers = ();
	type TransactionalProcessor = ();
	type HrmpNewChannelOpenRequestHandler = ();
	type HrmpChannelAcceptedHandler = ();
	type HrmpChannelClosingHandler = ();
	type XcmRecorder = ();
}

thread_local! {
	pub static EXECUTE_XCM_ORIGIN: RefCell<Option<Location>> = RefCell::new(None);
}

/// The `SendXcm` implementation directly executes XCM using `XcmExecutor`.
///
/// We ensure that the `ExportMessage` produced by `pezpallet_xcm_bridge_hub_router` is compatible
/// with the `ExportXcm` implementation of `pezpallet_xcm_bridge_hub`.
///
/// Note: The crucial part is that `ExportMessage` is processed by `XcmExecutor`, which calls the
/// `ExportXcm` implementation of `pezpallet_xcm_bridge_hub` as `MessageExporter`.
pub struct ExecuteXcmOverSendXcm;
impl SendXcm for ExecuteXcmOverSendXcm {
	type Ticket = Xcm<()>;

	fn validate(
		_: &mut Option<Location>,
		message: &mut Option<Xcm<()>>,
	) -> SendResult<Self::Ticket> {
		Ok((message.take().unwrap(), Assets::new()))
	}

	fn deliver(ticket: Self::Ticket) -> Result<XcmHash, SendError> {
		let xcm: Xcm<RuntimeCall> = ticket.into();

		let origin = EXECUTE_XCM_ORIGIN.with(|o| o.borrow().clone().unwrap());
		let mut hash = xcm.using_encoded(pezsp_io::hashing::blake2_256);
		let outcome = XcmExecutor::<XcmConfig>::prepare_and_execute(
			origin,
			xcm,
			&mut hash,
			Weight::MAX,
			Weight::zero(),
		);
		assert_ok!(outcome.ensure_complete());

		Ok(hash)
	}
}
impl InspectMessageQueues for ExecuteXcmOverSendXcm {
	fn clear_messages() {
		todo!()
	}

	fn get_messages() -> Vec<(VersionedLocation, Vec<VersionedXcm<()>>)> {
		todo!()
	}
}
impl ExecuteXcmOverSendXcm {
	pub fn set_origin_for_execute(origin: Location) {
		EXECUTE_XCM_ORIGIN.with(|o| *o.borrow_mut() = Some(origin));
	}
}

/// A dynamic way to set different universal location for the origin which sends `ExportMessage`.
pub struct ExportMessageOriginUniversalLocation;
impl ExportMessageOriginUniversalLocation {
	pub(crate) fn set(universal_location: Option<InteriorLocation>) {
		EXPORT_MESSAGE_ORIGIN_UNIVERSAL_LOCATION.with(|o| *o.borrow_mut() = universal_location);
	}
}
impl Get<InteriorLocation> for ExportMessageOriginUniversalLocation {
	fn get() -> InteriorLocation {
		EXPORT_MESSAGE_ORIGIN_UNIVERSAL_LOCATION.with(|o| {
			o.borrow()
				.clone()
				.expect("`EXPORT_MESSAGE_ORIGIN_UNIVERSAL_LOCATION` is not set!")
		})
	}
}
thread_local! {
	pub static EXPORT_MESSAGE_ORIGIN_UNIVERSAL_LOCATION: RefCell<Option<InteriorLocation>> = RefCell::new(None);
}

pub struct BridgeHubLocationXcmOriginAsRoot<RuntimeOrigin>(
	pezsp_std::marker::PhantomData<RuntimeOrigin>,
);
impl<RuntimeOrigin: OriginTrait> ConvertOrigin<RuntimeOrigin>
	for BridgeHubLocationXcmOriginAsRoot<RuntimeOrigin>
{
	fn convert_origin(
		origin: impl Into<Location>,
		kind: OriginKind,
	) -> Result<RuntimeOrigin, Location> {
		let origin = origin.into();
		if kind == OriginKind::Xcm && origin.eq(&BridgeHubLocation::get()) {
			Ok(RuntimeOrigin::root())
		} else {
			Err(origin)
		}
	}
}

/// Type for specifying how a `Location` can be converted into an `AccountId`. This is used
/// when determining ownership of accounts for asset transacting and when attempting to use XCM
/// `Transact` in order to determine the dispatch Origin.
pub type LocationToAccountId = (
	// The parent (Relay-chain) origin converts to the parent `AccountId`.
	ParentIsPreset<AccountId>,
	// Sibling teyrchain origins convert to AccountId via the `ParaId::into`.
	SiblingTeyrchainConvertsVia<Sibling, AccountId>,
);

parameter_types! {
	pub ParentRelayChainLocation: Location = Location { parents: 1, interior: Here };
}
pub struct OpenBridgeOrigin;

impl OpenBridgeOrigin {
	pub fn parent_relay_chain_origin() -> RuntimeOrigin {
		RuntimeOrigin::signed([0u8; 32].into())
	}

	pub fn parent_relay_chain_universal_origin() -> RuntimeOrigin {
		RuntimeOrigin::signed([1u8; 32].into())
	}

	pub fn sibling_teyrchain_origin() -> RuntimeOrigin {
		let mut account = [0u8; 32];
		account[..4].copy_from_slice(&SIBLING_ASSET_HUB_ID.encode()[..4]);
		RuntimeOrigin::signed(account.into())
	}

	pub fn sibling_teyrchain_universal_origin() -> RuntimeOrigin {
		RuntimeOrigin::signed([2u8; 32].into())
	}

	pub fn origin_without_sovereign_account() -> RuntimeOrigin {
		RuntimeOrigin::signed([3u8; 32].into())
	}

	pub fn disallowed_origin() -> RuntimeOrigin {
		RuntimeOrigin::signed([42u8; 32].into())
	}
}

impl EnsureOrigin<RuntimeOrigin> for OpenBridgeOrigin {
	type Success = Location;

	fn try_origin(o: RuntimeOrigin) -> Result<Self::Success, RuntimeOrigin> {
		let signer = o.clone().into_signer();
		if signer == Self::parent_relay_chain_origin().into_signer() {
			return Ok(ParentRelayChainLocation::get());
		} else if signer == Self::parent_relay_chain_universal_origin().into_signer() {
			return Ok(Location {
				parents: 2,
				interior: GlobalConsensus(RelayNetwork::get()).into(),
			});
		} else if signer == Self::sibling_teyrchain_universal_origin().into_signer() {
			return Ok(Location {
				parents: 2,
				interior: [GlobalConsensus(RelayNetwork::get()), Teyrchain(SIBLING_ASSET_HUB_ID)]
					.into(),
			});
		} else if signer == Self::origin_without_sovereign_account().into_signer() {
			return Ok(Location {
				parents: 1,
				interior: [Teyrchain(SIBLING_ASSET_HUB_ID), OnlyChild].into(),
			});
		}

		let mut sibling_account = [0u8; 32];
		sibling_account[..4].copy_from_slice(&SIBLING_ASSET_HUB_ID.encode()[..4]);
		if signer == Some(sibling_account.into()) {
			return Ok(Location { parents: 1, interior: Teyrchain(SIBLING_ASSET_HUB_ID).into() });
		}

		Err(o)
	}

	#[cfg(feature = "runtime-benchmarks")]
	fn try_successful_origin() -> Result<RuntimeOrigin, ()> {
		Ok(Self::parent_relay_chain_origin())
	}
}

pub(crate) type OpenBridgeOriginOf<T, I> =
	<T as pezpallet_xcm_bridge_hub::Config<I>>::OpenBridgeOrigin;

pub struct TestLocalXcmChannelManager;

impl TestLocalXcmChannelManager {
	pub fn make_congested() {
		pezframe_support::storage::unhashed::put(b"TestLocalXcmChannelManager.Congested", &true);
	}

	fn suspended_key(bridge: &BridgeId) -> Vec<u8> {
		[b"TestLocalXcmChannelManager.Suspended", bridge.encode().as_slice()].concat()
	}
	fn resumed_key(bridge: &BridgeId) -> Vec<u8> {
		[b"TestLocalXcmChannelManager.Resumed", bridge.encode().as_slice()].concat()
	}

	pub fn is_bridge_suspended(bridge: &BridgeId) -> bool {
		pezframe_support::storage::unhashed::get_or_default(&Self::suspended_key(bridge))
	}

	pub fn is_bridge_resumed(bridge: &BridgeId) -> bool {
		pezframe_support::storage::unhashed::get_or_default(&Self::resumed_key(bridge))
	}

	fn build_congestion_message(bridge: &BridgeId, is_congested: bool) -> Vec<Instruction<()>> {
		use bp_xcm_bridge_hub_router::XcmBridgeHubRouterCall;
		#[allow(clippy::large_enum_variant)]
		#[derive(Encode, Decode, Debug, PartialEq, Eq, Clone, scale_info::TypeInfo)]
		enum Call {
			#[codec(index = 57)]
			XcmOverBridgeWrappedWithExportMessageRouter(XcmBridgeHubRouterCall),
		}

		pezsp_std::vec![
			UnpaidExecution { weight_limit: Unlimited, check_origin: None },
			Transact {
				origin_kind: OriginKind::Xcm,
				fallback_max_weight: None,
				call: Call::XcmOverBridgeWrappedWithExportMessageRouter(
					XcmBridgeHubRouterCall::report_bridge_status {
						bridge_id: bridge.inner(),
						is_congested,
					}
				)
				.encode()
				.into(),
			},
			ExpectTransactStatus(MaybeErrorCode::Success),
		]
	}

	fn report_bridge_status(
		local_origin: &Location,
		bridge: &BridgeId,
		is_congested: bool,
		key: Vec<u8>,
	) -> Result<(), SendError> {
		// send as BridgeHub would send to sibling chain
		ExecuteXcmOverSendXcm::set_origin_for_execute(BridgeHubLocation::get());
		let result = send_xcm::<ExecuteXcmOverSendXcm>(
			local_origin.clone(),
			Self::build_congestion_message(&bridge, is_congested).into(),
		);

		if result.is_ok() {
			pezframe_support::storage::unhashed::put(&key, &true);
		}

		result.map(|_| ())
	}
}

impl LocalXcmChannelManager for TestLocalXcmChannelManager {
	type Error = SendError;

	fn is_congested(_with: &Location) -> bool {
		pezframe_support::storage::unhashed::get_or_default(b"TestLocalXcmChannelManager.Congested")
	}

	fn suspend_bridge(local_origin: &Location, bridge: BridgeId) -> Result<(), Self::Error> {
		Self::report_bridge_status(local_origin, &bridge, true, Self::suspended_key(&bridge))
	}

	fn resume_bridge(local_origin: &Location, bridge: BridgeId) -> Result<(), Self::Error> {
		Self::report_bridge_status(local_origin, &bridge, false, Self::resumed_key(&bridge))
	}
}

impl pezpallet_xcm_bridge_hub_router::XcmChannelStatusProvider for TestLocalXcmChannelManager {
	fn is_congested(with: &Location) -> bool {
		<Self as LocalXcmChannelManager>::is_congested(with)
	}
}

pub struct TestBlobDispatcher;

impl TestBlobDispatcher {
	pub fn is_dispatched() -> bool {
		pezframe_support::storage::unhashed::get_or_default(b"TestBlobDispatcher.Dispatched")
	}
}

impl DispatchBlob for TestBlobDispatcher {
	fn dispatch_blob(_blob: Vec<u8>) -> Result<(), DispatchBlobError> {
		pezframe_support::storage::unhashed::put(b"TestBlobDispatcher.Dispatched", &true);
		Ok(())
	}
}

pub struct ThisUnderlyingChain;

impl Chain for ThisUnderlyingChain {
	const ID: ChainId = *b"tuch";

	type BlockNumber = u64;
	type Hash = H256;
	type Hasher = BlakeTwo256;
	type Header = BizinikiwiHeader;
	type AccountId = AccountId;
	type Balance = Balance;
	type Nonce = u64;
	type Signature = pezsp_runtime::MultiSignature;

	const STATE_VERSION: StateVersion = StateVersion::V1;

	fn max_extrinsic_size() -> u32 {
		u32::MAX
	}

	fn max_extrinsic_weight() -> Weight {
		Weight::MAX
	}
}

impl ChainWithMessages for ThisUnderlyingChain {
	const WITH_CHAIN_MESSAGES_PALLET_NAME: &'static str = "WithThisChainBridgeMessages";
	const MAX_UNREWARDED_RELAYERS_IN_CONFIRMATION_TX: MessageNonce = 16;
	const MAX_UNCONFIRMED_MESSAGES_IN_CONFIRMATION_TX: MessageNonce = 128;
}

pub type BridgedHeaderHash = H256;
pub type BridgedChainHeader = BizinikiwiHeader;

pub struct BridgedUnderlyingChain;
impl Chain for BridgedUnderlyingChain {
	const ID: ChainId = *b"bgdc";
	type BlockNumber = u64;
	type Hash = BridgedHeaderHash;
	type Hasher = BlakeTwo256;
	type Header = BridgedChainHeader;
	type AccountId = AccountId;
	type Balance = Balance;
	type Nonce = u64;
	type Signature = pezsp_runtime::MultiSignature;

	const STATE_VERSION: StateVersion = StateVersion::V1;

	fn max_extrinsic_size() -> u32 {
		4096
	}

	fn max_extrinsic_weight() -> Weight {
		Weight::MAX
	}
}

impl ChainWithMessages for BridgedUnderlyingChain {
	const WITH_CHAIN_MESSAGES_PALLET_NAME: &'static str = "WithBridgedChainBridgeMessages";
	const MAX_UNREWARDED_RELAYERS_IN_CONFIRMATION_TX: MessageNonce = 16;
	const MAX_UNCONFIRMED_MESSAGES_IN_CONFIRMATION_TX: MessageNonce = 128;
}

pub struct BridgedHeaderChain;
impl bp_header_pez_chain::HeaderChain<BridgedUnderlyingChain> for BridgedHeaderChain {
	fn finalized_header_state_root(
		_hash: HashOf<BridgedUnderlyingChain>,
	) -> Option<HashOf<BridgedUnderlyingChain>> {
		unreachable!()
	}
}

/// Test message dispatcher.
pub struct TestMessageDispatch;

impl TestMessageDispatch {
	pub fn deactivate(lane: TestLaneIdType) {
		pezframe_support::storage::unhashed::put(&(b"inactive", lane).encode()[..], &false);
	}
}

impl MessageDispatch for TestMessageDispatch {
	type DispatchPayload = Vec<u8>;
	type DispatchLevelResult = ();
	type LaneId = TestLaneIdType;

	fn is_active(lane: Self::LaneId) -> bool {
		pezframe_support::storage::unhashed::take::<bool>(&(b"inactive", lane).encode()[..]) !=
			Some(false)
	}

	fn dispatch_weight(
		_message: &mut DispatchMessage<Self::DispatchPayload, Self::LaneId>,
	) -> Weight {
		Weight::zero()
	}

	fn dispatch(
		_: DispatchMessage<Self::DispatchPayload, Self::LaneId>,
	) -> MessageDispatchResult<Self::DispatchLevelResult> {
		MessageDispatchResult { unspent_weight: Weight::zero(), dispatch_level_result: () }
	}
}

/// Run pezpallet test.
pub fn run_test<T>(test: impl FnOnce() -> T) -> T {
	pezsp_io::TestExternalities::new(
		pezframe_system::GenesisConfig::<TestRuntime>::default()
			.build_storage()
			.unwrap(),
	)
	.execute_with(test)
}