// Copyright (C) 2022 Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// 	http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

//! Almost identical to ../asset-hubs/asset-hub-kusama

use super::{
	AccountId, Balances, CollatorSelection, FeeAssetId, ParachainInfo, ParachainSystem,
	PolkadotXcm, Runtime, RuntimeCall, RuntimeEvent, RuntimeOrigin, ToParentBaseDeliveryFee,
	TransactionByteFee, WeightToFee, XcmpQueue,
};
use frame_support::{
	parameter_types,
	traits::{tokens::imbalance::ResolveTo, Contains, Everything, Nothing},
};
use frame_system::EnsureRoot;
use pallet_xcm::XcmPassthrough;
use parachains_common::xcm_config::{ConcreteAssetFromSystem, ParentRelayOrSiblingParachains};
use polkadot_parachain_primitives::primitives::Sibling;

use sp_core::ConstU32;

use xcm::latest::prelude::*;
use xcm_builder::{
	AccountId32Aliases, AllowExplicitUnpaidExecutionFrom, AllowKnownQueryResponses,
	AllowSubscriptionsFrom, AllowTopLevelPaidExecutionFrom, DenyReserveTransferToRelayChain,
	DenyThenTry, DescribeTerminus, EnsureXcmOrigin, FrameTransactionalProcessor, FungibleAdapter,
	HashedDescription, IsConcrete, ParentAsSuperuser, ParentIsPreset, RelayChainAsNative,
	SiblingParachainAsNative, SiblingParachainConvertsVia, SignedAccountId32AsNative,
	SignedToAccountId32, SovereignSignedViaLocation, TakeWeightCredit, TrailingSetTopicAsId,
	UsingComponents, WeightInfoBounds, WithComputedOrigin,
};
use xcm_executor::XcmExecutor;

parameter_types! {
	pub const KsmLocation: Location = Location::parent();
	pub const RelayNetwork: NetworkId = NetworkId::Kusama;
	pub RelayChainOrigin: RuntimeOrigin = cumulus_pallet_xcm::Origin::Relay.into();
	pub Ancestry: Location = Parachain(ParachainInfo::parachain_id().into()).into();
	pub CheckingAccount: AccountId = PolkadotXcm::check_account();
	pub UniversalLocation: InteriorLocation =
	[GlobalConsensus(RelayNetwork::get()), Parachain(ParachainInfo::parachain_id().into())].into();
	pub StakingPot: AccountId = CollatorSelection::account_id();
}

/// 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 parachain origins convert to AccountId via the `ParaId::into`.
	SiblingParachainConvertsVia<Sibling, AccountId>,
	// Straight up local `AccountId32` origins just alias directly to `AccountId`.
	AccountId32Aliases<RelayNetwork, AccountId>,
	// Here/local root location to `AccountId`.
	HashedDescription<AccountId, DescribeTerminus>,
);

/// Means for transacting the native currency on this chain.
pub type FungibleTransactor = FungibleAdapter<
	// Use this currency:
	Balances,
	// Use this currency when it is a fungible asset matching the given location or name:
	IsConcrete<KsmLocation>,
	// Convert an XCM `Location` into a local account ID:
	LocationToAccountId,
	// Our chain's account ID type (we can't get away without mentioning it explicitly):
	AccountId,
	// We don't track any teleports of `Balances`.
	(),
>;

/// This is the type we use to convert an (incoming) XCM origin into a local `Origin` instance,
/// ready for dispatching a transaction with Xcm's `Transact`.
///
/// There is an `OriginKind` which can biases the kind of local `Origin` it will become.
pub type XcmOriginToTransactDispatchOrigin = (
	// Sovereign account converter; this attempts to derive an `AccountId` from the origin location
	// using `LocationToAccountId` and then turn that into the usual `Signed` origin. Useful for
	// foreign chains who want to have a local sovereign account on this chain which they control.
	SovereignSignedViaLocation<LocationToAccountId, RuntimeOrigin>,
	// Native converter for Relay-chain (Parent) location; will convert to a `Relay` origin when
	// recognised.
	RelayChainAsNative<RelayChainOrigin, RuntimeOrigin>,
	// Native converter for sibling Parachains; will convert to a `SiblingPara` origin when
	// recognised.
	SiblingParachainAsNative<cumulus_pallet_xcm::Origin, RuntimeOrigin>,
	// Superuser converter for the Relay-chain (Parent) location. This will allow it to issue a
	// transaction from the Root origin.
	ParentAsSuperuser<RuntimeOrigin>,
	// Native signed account converter; this just converts an `AccountId32` origin into a normal
	// `RuntimeOrigin::Signed` origin of the same 32-byte value.
	SignedAccountId32AsNative<RelayNetwork, RuntimeOrigin>,
	// Xcm origins can be represented natively under the Xcm pallet's Xcm origin.
	XcmPassthrough<RuntimeOrigin>,
);

parameter_types! {
	// One XCM operation is 1_000_000_000 weight - almost certainly a conservative estimate.
	pub UnitWeightCost: Weight = Weight::from_parts(1_000_000_000, 0);
	pub const MaxInstructions: u32 = 100;
}

pub struct ParentOrParentsPlurality;

impl Contains<Location> for ParentOrParentsPlurality {
	fn contains(location: &Location) -> bool {
		matches!(location.unpack(), (1, []) | (1, [Plurality { .. }]))
	}
}

pub type Barrier = TrailingSetTopicAsId<
	DenyThenTry<
		DenyReserveTransferToRelayChain,
		(
			TakeWeightCredit,
			// Expected responses are OK.
			AllowKnownQueryResponses<PolkadotXcm>,
			// Allow XCMs with some computed origins to pass through.
			WithComputedOrigin<
				(
					// If the message is one that immediately attempts to pay for execution, then
					// allow it.
					AllowTopLevelPaidExecutionFrom<Everything>,
					// Parent, its pluralities (i.e. governance bodies), parent's treasury and
					// sibling bridge hub get free execution.
					AllowExplicitUnpaidExecutionFrom<(ParentOrParentsPlurality,)>,
					// Subscriptions for version tracking are OK.
					AllowSubscriptionsFrom<ParentRelayOrSiblingParachains>,
				),
				UniversalLocation,
				ConstU32<8>,
			>,
		),
	>,
>;

parameter_types! {
	pub const MaxAssetsIntoHolding: u32 = 64;
	pub const KsmRelayLocation: Location = Location::parent();
}

/// Cases where a remote origin is accepted as trusted Teleporter for a given asset:
/// - KSM with the parent Relay Chain and sibling parachains.
pub type TrustedTeleporters = ConcreteAssetFromSystem<KsmRelayLocation>;

pub struct XcmConfig;

impl xcm_executor::Config for XcmConfig {
	type RuntimeCall = RuntimeCall;
	type XcmSender = XcmRouter;
	type XcmRecorder = ();
	type AssetTransactor = FungibleTransactor;
	type OriginConverter = XcmOriginToTransactDispatchOrigin;
	type IsReserve = ();
	type IsTeleporter = TrustedTeleporters;
	type UniversalLocation = UniversalLocation;
	type Barrier = Barrier;
	type Weigher = WeightInfoBounds<
		crate::weights::xcm::EncointerKusamaXcmWeight<RuntimeCall>,
		RuntimeCall,
		MaxInstructions,
	>;
	type Trader = UsingComponents<
		WeightToFee,
		KsmLocation,
		AccountId,
		Balances,
		ResolveTo<StakingPot, Balances>,
	>;
	type ResponseHandler = PolkadotXcm;
	type AssetTrap = PolkadotXcm;
	type AssetClaims = PolkadotXcm;
	type SubscriptionService = PolkadotXcm;
	type PalletInstancesInfo = crate::AllPalletsWithSystem;
	type MaxAssetsIntoHolding = MaxAssetsIntoHolding;
	type AssetLocker = ();
	type AssetExchanger = ();
	type FeeManager = ();
	type MessageExporter = ();
	type UniversalAliases = Nothing;
	type CallDispatcher = RuntimeCall;
	type SafeCallFilter = Everything;
	type Aliasers = Nothing;
	type TransactionalProcessor = FrameTransactionalProcessor;
	type HrmpNewChannelOpenRequestHandler = ();
	type HrmpChannelAcceptedHandler = ();
	type HrmpChannelClosingHandler = ();
}

/// Converts a local signed origin into an XCM `Location`.
/// Forms the basis for local origins sending/executing XCMs.
pub type LocalSignedOriginToLocation = SignedToAccountId32<RuntimeOrigin, AccountId, RelayNetwork>;

pub type PriceForParentDelivery = polkadot_runtime_common::xcm_sender::ExponentialPrice<
	FeeAssetId,
	ToParentBaseDeliveryFee,
	TransactionByteFee,
	ParachainSystem,
>;

/// The means for routing XCM messages which are not for local execution into the right message
/// queues.
pub type XcmRouter = (
	// Two routers - use UMP to communicate with the relay chain:
	cumulus_primitives_utility::ParentAsUmp<ParachainSystem, PolkadotXcm, PriceForParentDelivery>,
	// ..and XCMP to communicate with the sibling chains.
	XcmpQueue,
);

#[cfg(feature = "runtime-benchmarks")]
parameter_types! {
	pub ReachableDest: Option<Location> = Some(Parent.into());
}

impl pallet_xcm::Config for Runtime {
	type RuntimeEvent = RuntimeEvent;
	// Any local signed origin can send XCM messages.
	type SendXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, LocalSignedOriginToLocation>;
	type XcmRouter = XcmRouter;
	// Any local signed origin can execute XCM messages.
	type ExecuteXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, LocalSignedOriginToLocation>;
	type XcmExecuteFilter = Everything;
	type XcmExecutor = XcmExecutor<XcmConfig>;
	type XcmTeleportFilter = Everything;
	type XcmReserveTransferFilter = Everything;
	type Weigher = WeightInfoBounds<
		crate::weights::xcm::EncointerKusamaXcmWeight<RuntimeCall>,
		RuntimeCall,
		MaxInstructions,
	>;
	type RuntimeOrigin = RuntimeOrigin;
	type RuntimeCall = RuntimeCall;
	const VERSION_DISCOVERY_QUEUE_SIZE: u32 = 100;
	type AdvertisedXcmVersion = pallet_xcm::CurrentXcmVersion;
	type Currency = Balances;
	type CurrencyMatcher = ();
	type TrustedLockers = ();
	type SovereignAccountOf = LocationToAccountId;
	type MaxLockers = ConstU32<8>;
	type WeightInfo = crate::weights::pallet_xcm::WeightInfo<Runtime>;
	type AdminOrigin = EnsureRoot<AccountId>;
	type UniversalLocation = UniversalLocation;
	type MaxRemoteLockConsumers = ConstU32<0>;
	type RemoteLockConsumerIdentifier = ();
}

impl cumulus_pallet_xcm::Config for Runtime {
	type RuntimeEvent = RuntimeEvent;
	type XcmExecutor = XcmExecutor<XcmConfig>;
}
