// Copyright 2019-2022 PureStake Inc.

// This file is part of Moonbeam.

// Moonbeam 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.

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

//! Test utilities

use super::*;

use frame_support::traits::tokens::{PayFromAccount, UnityAssetBalanceConversion};

use frame_support::{

	construct_runtime, parameter_types,

	traits::{ConstU128, Everything, MapSuccess, OnFinalize, OnInitialize},

	PalletId,

};

use frame_system::pallet_prelude::BlockNumberFor;

use pallet_evm::{EnsureAddressNever, EnsureAddressRoot, SubstrateBlockHashMapping};

use precompile_utils::{

	precompile_set::*,

	testing::{Bob, Charlie, MockAccount},

};

use sp_core::{H256, U256};

use sp_io;

use sp_runtime::{

	traits::{BlakeTwo256, IdentityLookup, Replace},

	BuildStorage, Permill,

};

#[cfg(feature = "runtime-benchmarks")]

use pallet_treasury::ArgumentsFactory;

pub type AccountId = MockAccount;

pub type Balance = u128;

pub type BlockNumber = BlockNumberFor<Runtime>;

type Block = frame_system::mocking::MockBlockU32<Runtime>;

// Configure a mock runtime to test the pallet.

parameter_types! {

	pub const BlockHashCount: u32 = 250;

	pub const SS58Prefix: u8 = 42;

}

impl frame_system::Config for Runtime {

	type BaseCallFilter = Everything;

	type DbWeight = ();

	type RuntimeOrigin = RuntimeOrigin;

	type RuntimeTask = RuntimeTask;

	type Nonce = u64;

	type Block = Block;

	type RuntimeCall = RuntimeCall;

	type Hash = H256;

	type Hashing = BlakeTwo256;

	type AccountId = AccountId;

	type Lookup = IdentityLookup<Self::AccountId>;

	type RuntimeEvent = RuntimeEvent;

	type BlockHashCount = BlockHashCount;

	type Version = ();

	type PalletInfo = PalletInfo;

	type AccountData = pallet_balances::AccountData<Balance>;

	type OnNewAccount = ();

	type OnKilledAccount = ();

	type SystemWeightInfo = ();

	type BlockWeights = ();

	type BlockLength = ();

	type SS58Prefix = SS58Prefix;

	type OnSetCode = ();

	type MaxConsumers = frame_support::traits::ConstU32<16>;

	type SingleBlockMigrations = ();

	type MultiBlockMigrator = ();

	type PreInherents = ();

	type PostInherents = ();

	type PostTransactions = ();

}

parameter_types! {

	pub const ExistentialDeposit: u128 = 0;

}

impl pallet_balances::Config for Runtime {

	type MaxReserves = ();

	type ReserveIdentifier = ();

	type MaxLocks = ();

	type Balance = Balance;

	type RuntimeEvent = RuntimeEvent;

	type DustRemoval = ();

	type ExistentialDeposit = ExistentialDeposit;

	type AccountStore = System;

	type WeightInfo = ();

	type RuntimeHoldReason = ();

	type FreezeIdentifier = ();

	type MaxFreezes = ();

	type RuntimeFreezeReason = ();

}

pub type Precompiles<R> = PrecompileSetBuilder<

	R,

	(PrecompileAt<AddressU64<1>, CollectivePrecompile<R, pallet_collective::Instance1>>,),

>;

pub type PCall = CollectivePrecompileCall<Runtime, pallet_collective::Instance1>;

const MAX_POV_SIZE: u64 = 5 * 1024 * 1024;

/// Block storage limit in bytes. Set to 40 KB.

const BLOCK_STORAGE_LIMIT: u64 = 40 * 1024;

parameter_types! {

	pub BlockGasLimit: U256 = U256::from(u64::MAX);

	pub PrecompilesValue: Precompiles<Runtime> = Precompiles::new();

	pub const WeightPerGas: Weight = Weight::from_parts(1, 0);

	pub GasLimitPovSizeRatio: u64 = {

		let block_gas_limit = BlockGasLimit::get().min(u64::MAX.into()).low_u64();

		block_gas_limit.saturating_div(MAX_POV_SIZE)

	};

	pub GasLimitStorageGrowthRatio : u64 = {

		let block_gas_limit = BlockGasLimit::get().min(u64::MAX.into()).low_u64();

		block_gas_limit.saturating_div(BLOCK_STORAGE_LIMIT)

	};

}

impl pallet_evm::Config for Runtime {

	type FeeCalculator = ();

	type GasWeightMapping = pallet_evm::FixedGasWeightMapping<Self>;

	type WeightPerGas = WeightPerGas;

	type CallOrigin = EnsureAddressRoot<AccountId>;

	type WithdrawOrigin = EnsureAddressNever<AccountId>;

	type AddressMapping = AccountId;

	type Currency = Balances;

	type RuntimeEvent = RuntimeEvent;

	type Runner = pallet_evm::runner::stack::Runner<Self>;

	type PrecompilesType = Precompiles<Self>;

	type PrecompilesValue = PrecompilesValue;

	type ChainId = ();

	type OnChargeTransaction = ();

	type BlockGasLimit = BlockGasLimit;

	type BlockHashMapping = SubstrateBlockHashMapping<Self>;

	type FindAuthor = ();

	type OnCreate = ();

	type GasLimitPovSizeRatio = GasLimitPovSizeRatio;

	type SuicideQuickClearLimit = ConstU32<0>;

	type GasLimitStorageGrowthRatio = GasLimitStorageGrowthRatio;

	type Timestamp = Timestamp;

	type WeightInfo = pallet_evm::weights::SubstrateWeight<Runtime>;

}

parameter_types! {

	pub const MinimumPeriod: u64 = 5;

}

impl pallet_timestamp::Config for Runtime {

	type Moment = u64;

	type OnTimestampSet = ();

	type MinimumPeriod = MinimumPeriod;

	type WeightInfo = ();

}

parameter_types! {

	pub const LaunchPeriod: BlockNumber = 10;

	pub const VotingPeriod: BlockNumber = 10;

	pub const VoteLockingPeriod: BlockNumber = 10;

	pub const FastTrackVotingPeriod: BlockNumber = 5;

	pub const EnactmentPeriod: BlockNumber = 10;

	pub const CooloffPeriod: BlockNumber = 10;

	pub const MinimumDeposit: Balance = 10;

	pub const MaxVotes: u32 = 10;

	pub const MaxProposals: u32 = 10;

	pub const PreimageByteDeposit: Balance = 10;

	pub const InstantAllowed: bool = false;

}

parameter_types! {

	pub const ProposalBond: Permill = Permill::from_percent(5);

	pub const TreasuryId: PalletId = PalletId(*b"pc/trsry");

	pub TreasuryAccount: AccountId = Treasury::account_id();

}

#[cfg(feature = "runtime-benchmarks")]

pub struct BenchmarkHelper;

#[cfg(feature = "runtime-benchmarks")]

impl ArgumentsFactory<(), AccountId> for BenchmarkHelper {

	fn create_asset_kind(_seed: u32) -> () {

		()

	}

	fn create_beneficiary(seed: [u8; 32]) -> AccountId {

		AccountId::from(H160::from(H256::from(seed)))

	}

}

impl pallet_treasury::Config for Runtime {

	type PalletId = TreasuryId;

	type Currency = Balances;

	type RejectOrigin = frame_support::traits::NeverEnsureOrigin<Balance>;

	type RuntimeEvent = RuntimeEvent;

	// If spending proposal rejected, transfer proposer bond to treasury

	type SpendPeriod = ConstU32<1>;

	type Burn = ();

	type BurnDestination = ();

	type MaxApprovals = ConstU32<100>;

	type WeightInfo = pallet_treasury::weights::SubstrateWeight<Runtime>;

	type SpendFunds = ();

	type SpendOrigin = MapSuccess<

		pallet_collective::EnsureProportionMoreThan<AccountId, pallet_collective::Instance1, 1, 2>,

		Replace<ConstU128<1000>>,

	>;

	type AssetKind = ();

	type Beneficiary = AccountId;

	type BeneficiaryLookup = IdentityLookup<AccountId>;

	type Paymaster = PayFromAccount<Balances, TreasuryAccount>;

	type BalanceConverter = UnityAssetBalanceConversion;

	type PayoutPeriod = ConstU32<0>;

	#[cfg(feature = "runtime-benchmarks")]

	type BenchmarkHelper = BenchmarkHelper;

}

parameter_types! {

	pub MaxProposalWeight: Weight = Weight::from_parts(1_000_000_000, 1_000_000_000);

}

impl pallet_collective::Config<pallet_collective::Instance1> for Runtime {

	type RuntimeOrigin = RuntimeOrigin;

	type RuntimeEvent = RuntimeEvent;

	type Proposal = RuntimeCall;

	/// The maximum amount of time (in blocks) for council members to vote on motions.

	/// Motions may end in fewer blocks if enough votes are cast to determine the result.

	type MotionDuration = ConstU32<2>;

	/// The maximum number of Proposlas that can be open in the council at once.

	type MaxProposals = ConstU32<100>;

	/// The maximum number of council members.

	type MaxMembers = ConstU32<100>;

	type DefaultVote = pallet_collective::MoreThanMajorityThenPrimeDefaultVote;

	type WeightInfo = pallet_collective::weights::SubstrateWeight<Runtime>;

	type SetMembersOrigin = frame_system::EnsureRoot<AccountId>;

	type MaxProposalWeight = MaxProposalWeight;

}

/// Build test externalities, prepopulated with data for testing democracy precompiles

pub(crate) struct ExtBuilder {

	/// Endowed accounts with balances

	balances: Vec<(AccountId, Balance)>,

	/// Collective members

	collective: Vec<AccountId>,

}

impl Default for ExtBuilder {

}

impl ExtBuilder {

	/// Fund some accounts before starting the test

	#[allow(unused)]

	/// Set members of the collective

	#[allow(unused)]

	/// Build the test externalities for use in tests

	#[allow(unused)]

}

#[allow(unused)]

	// We skip timestamp's on_finalize because it requires that the timestamp inherent be set

	// We may be able to simulate this by poking its storage directly, but I don't see any value

	// added from doing that.

#[macro_export]

macro_rules! assert_tail_eq {

	($tail:expr, $arr:expr) => {

		if $tail.len() != 0 {

			// 0-length always passes

			if $tail.len() > $arr.len() {

				similar_asserts::assert_eq!($tail, $arr); // will fail

			}

			let len_diff = $arr.len() - $tail.len();

			similar_asserts::assert_eq!($tail, $arr[len_diff..]);

		}

	};

}

/// Panics if an event is not found in the system log of events

#[macro_export]

macro_rules! assert_event_emitted {

	($event:expr) => {

		match &$event {

			e => {

				assert!(

					crate::mock::events().iter().find(|x| *x == e).is_some(),

					"Event {:?} was not found in events: \n {:#?}",

					e,

					crate::mock::events()

				);

			}

		}

	};

}