// Copyright 2021 Centrifuge Foundation (centrifuge.io).
//
// This file is part of the Centrifuge chain project.
// Centrifuge 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 (see http://www.gnu.org/licenses).
// Centrifuge 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.

// Ensure we're `no_std` when compiling for WebAssembly.
#![cfg_attr(not(feature = "std"), no_std)]
// Allow things like `1 * CFG`
#![allow(clippy::identity_op)]

pub mod conversion;
mod impls;

pub use constants::*;
pub use types::*;

/// Common types for all runtimes
pub mod types {
	use parity_scale_codec::{CompactAs, Decode, Encode, MaxEncodedLen};
	use scale_info::TypeInfo;
	#[cfg(feature = "std")]
	use serde::{Deserialize, Serialize};
	use sp_core::{H160, U256};
	use sp_runtime::{
		traits::{self, BlakeTwo256, IdentifyAccount, Verify},
		OpaqueExtrinsic,
	};
	use sp_std::vec::Vec;

	/// PoolId type we use.
	pub type PoolId = u64;

	/// OrderId type we use to identify order per epoch.
	pub type OrderId = u64;

	/// EpochId type we use to identify epochs in our revolving pools
	pub type PoolEpochId = u32;

	/// An index to a block.
	pub type BlockNumber = u32;

	/// Alias to 512-bit hash when used in the context of a transaction
	/// signature on the chain.
	pub type Signature = sp_runtime::MultiSignature;

	/// Some way of identifying an account on the chain. We intentionally make
	/// it equivalent to the public key of our transaction signing scheme.
	pub type AccountId = <<Signature as Verify>::Signer as IdentifyAccount>::AccountId;

	/// The address format for describing accounts.
	pub type Address = sp_runtime::MultiAddress<AccountId, ()>;

	/// Balance of an account.
	pub type Balance = u128;

	/// IBalance is the signed version of the Balance for orml tokens
	pub type IBalance = i128;

	/// Nonce of a transaction in the chain.
	pub type Nonce = u32;

	/// A hash of some data used by the chain.
	pub type Hash = <BlakeTwo256 as traits::Hash>::Output;

	/// The hashing algorithm used by the chain
	///
	/// NOTE: Must never change
	pub type Hashing = BlakeTwo256;

	/// A generic block for the node to use, as we can not commit to
	/// a specific Extrinsic format at this point. Runtimes will ensure
	/// Extrinsic are correctly decoded.
	/// Used by the node.
	pub type Block = sp_runtime::generic::Block<Header, OpaqueExtrinsic>;

	/// Block header type as expected by this runtime.
	pub type Header = sp_runtime::generic::Header<BlockNumber, Hashing>;

	/// Aura consensus authority.
	pub type AuraId = sp_consensus_aura::sr25519::AuthorityId;

	// A vector of bytes, conveniently named like it is in Solidity.
	pub type Bytes = Vec<u8>;

	// A 32 bytes fixed-size array.
	pub type Bytes32 = FixedArray<u8, 32>;

	// Fixed-size array of given typed elements.
	pub type FixedArray<T, const S: usize> = [T; S];

	// A cryptographic salt to be combined with a value before hashing.
	pub type Salt = FixedArray<u8, 32>;

	/// A representation of registryID.
	#[derive(Encode, Decode, Default, Copy, Clone, PartialEq, Eq, TypeInfo)]
	#[cfg_attr(feature = "std", derive(Debug, Serialize, Deserialize))]
	pub struct RegistryId(pub H160);

	// The id of an asset as it corresponds to the "token id" of a Centrifuge
	// document. A registry id is needed as well to uniquely identify an asset
	// on-chain.
	#[derive(Encode, Decode, Default, Copy, Clone, PartialEq, Eq, TypeInfo)]
	#[cfg_attr(feature = "std", derive(Debug, Serialize, Deserialize))]
	pub struct TokenId(pub U256);

	/// A generic representation of a local address. A resource id points to
	/// this. It may be a registry id (20 bytes) or a fungible asset type (in
	/// the future). Constrained to 32 bytes just as an upper bound to store
	/// efficiently.
	#[derive(Encode, Decode, Default, Clone, PartialEq, Eq, TypeInfo)]
	#[cfg_attr(feature = "std", derive(Debug))]
	pub struct EthAddress(pub Bytes32);

	/// A representation of CollectionId for Uniques
	pub type CollectionId = u64;

	/// A representation of a tranche identifier
	pub type TrancheId = [u8; 16];

	/// A representation of an investment
	pub type InvestmentId = (PoolId, TrancheId);

	/// A representation of a tranche weight, used to weight
	/// importance of a tranche
	#[derive(Encode, Decode, Copy, Debug, Default, Clone, PartialEq, Eq, TypeInfo, CompactAs)]
	#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]
	pub struct TrancheWeight(pub u128);

	/// A representation of ItemId for Uniques.
	#[derive(
		Encode,
		Decode,
		Default,
		Copy,
		Clone,
		PartialEq,
		Eq,
		CompactAs,
		Debug,
		MaxEncodedLen,
		TypeInfo,
	)]
	#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]
	pub struct ItemId(pub u128);

	/// A representation of a loan identifier
	pub type LoanId = u64;

	/// The type for indexing pallets on a Substrate runtime
	pub type PalletIndex = u8;

	/// The representation of a pool fee identifier
	pub type PoolFeeId = u64;

	/// The type for LP gateway message nonces.
	pub type LPGatewayQueueMessageNonce = u64;

	/// The type for LP gateway session IDs.
	pub type LPGatewaySessionId = u64;
}

/// Common constants for all runtimes
pub mod constants {
	use frame_support::weights::{constants::WEIGHT_REF_TIME_PER_SECOND, Weight};
	use sp_runtime::Perbill;

	use super::types::{Balance, BlockNumber};

	/// This determines the average expected block time that we are targeting.
	/// Blocks will be produced at a minimum duration defined by
	/// `SLOT_DURATION`. `SLOT_DURATION` is picked up by `pallet_timestamp`
	/// which is in turn picked up by `pallet_aura` to implement `fn
	/// slot_duration()`.
	///
	/// Change this to adjust the block time.
	pub const MILLISECS_PER_BLOCK: u64 = 12000;
	pub const SLOT_DURATION: u64 = MILLISECS_PER_BLOCK;

	// Time is measured by number of blocks.
	pub const MINUTES: BlockNumber = 60_000 / (MILLISECS_PER_BLOCK as BlockNumber);
	pub const HOURS: BlockNumber = MINUTES * 60;
	pub const DAYS: BlockNumber = HOURS * 24;

	/// Milliseconds per day
	pub const MILLISECS_PER_DAY: u64 = SECONDS_PER_DAY * 1000;

	// Seconds units
	pub const SECONDS_PER_MINUTE: u64 = 60;
	pub const SECONDS_PER_HOUR: u64 = SECONDS_PER_MINUTE * 60;
	pub const SECONDS_PER_DAY: u64 = SECONDS_PER_HOUR * 24;
	pub const SECONDS_PER_WEEK: u64 = SECONDS_PER_DAY * 7;
	pub const SECONDS_PER_MONTH: u64 = SECONDS_PER_DAY * 30;
	pub const SECONDS_PER_YEAR: u64 = SECONDS_PER_DAY * 365;

	/// We assume that ~5% of the block weight is consumed by `on_initialize`
	/// handlers. This is used to limit the maximal weight of a single
	/// extrinsic.
	pub const AVERAGE_ON_INITIALIZE_RATIO: Perbill = Perbill::from_percent(5);
	/// We allow `Normal` extrinsics to fill up the block up to 75%, the rest
	/// can be used by Operational  extrinsics.
	pub const NORMAL_DISPATCH_RATIO: Perbill = Perbill::from_percent(75);

	/// We allow for 0.5 seconds of compute with a 6 second average block time.
	pub const MAXIMUM_BLOCK_WEIGHT: Weight = Weight::from_parts(WEIGHT_REF_TIME_PER_SECOND, 0)
		.saturating_div(2)
		.set_proof_size(MAX_POV_SIZE);

	pub const MICRO_CFG: Balance = 1_000_000_000_000; // 10−6 	0.000001
	pub const MILLI_CFG: Balance = 1_000 * MICRO_CFG; // 10−3 	0.001
	pub const CENTI_CFG: Balance = 10 * MILLI_CFG; // 10−2 	0.01
	pub const CFG: Balance = 100 * CENTI_CFG;

	// The decimals for the tokens we handle natively in our runtimes.
	// Other tokens are registered in the orml_asset_registry and
	// their decimals can be found in their respective metadata.
	pub mod currency_decimals {
		pub const NATIVE: u32 = 18;
		pub const AUSD: u32 = 12;
		pub const KSM: u32 = 12;
	}

	/// Minimum vesting amount, in CFG/AIR
	pub const MIN_VESTING: Balance = 10;

	/// Value for a not specified fee key.
	pub const DEFAULT_FEE_VALUE: Balance = 1 * CFG;

	/// % of fee addressed to the Treasury. The reminder % will be for the block
	/// author.
	pub const TREASURY_FEE_RATIO: Perbill = Perbill::from_percent(80);

	/// The max length allowed for a tranche token name
	pub const MAX_TOKEN_NAME_LENGTH_BYTES: u32 = 128;

	/// The max length allowed for a tranche token symbol
	pub const MAX_TOKEN_SYMBOL_LENGTH_BYTES: u32 = 32;

	pub const fn deposit(items: u32, bytes: u32) -> Balance {
		items as Balance * 15 * CENTI_CFG + (bytes as Balance) * 6 * CENTI_CFG
	}

	/// Unhashed 36-bytes prefix for currencies managed by LiquidityPools.
	pub const GENERAL_CURRENCY_INDEX_PREFIX: [u8; 36] = *b"CentrifugeGeneralCurrencyIndexPrefix";

	/// Transaction recovery ID used for generating a signature in the Ethereum
	/// Transaction pallet. As per:
	/// <https://github.com/PureStake/moonbeam/blob/fb63014a5e487f17e31283776e4f6b0befd009a2/primitives/xcm/src/ethereum_xcm.rs#L167>
	pub const TRANSACTION_RECOVERY_ID: u64 = 42;

	/// The safe XCM version of pallet-xcm, same as on relay chain
	pub const SAFE_XCM_VERSION: u32 = staging_xcm::opaque::v2::VERSION;

	pub const MAX_POV_SIZE: u64 = cumulus_primitives_core::relay_chain::MAX_POV_SIZE as u64;
	/// Block storage limit in bytes. Set to 40 KB.
	pub const BLOCK_STORAGE_LIMIT: u64 = 40 * 1024;

	/// The maximum number of fees per pool.
	///
	/// NOTE: Must be ge than [MAX_POOL_FEES_PER_BUCKET].
	pub const MAX_FEES_PER_POOL: u32 = 200;

	/// The maximum number of pool fees per pool fee bucket
	pub const MAX_POOL_FEES_PER_BUCKET: u32 = 100;

	/// Identification of the native token of the chain. Used in XCM locations.
	pub const NATIVE_KEY: &[u8] = &[0, 1];

	/// The index of the root OpenGov track
	pub const TRACK_INDEX_ROOT: u16 = 0;
	/// The index of the whitelisted caller OpenGov track
	pub const TRACK_INDEX_WHITELISTED_CALLER: u16 = 1;
	/// The index of the pool admin OpenGov track
	pub const TRACK_INDEX_POOL_ADMIN: u16 = 10;
	/// The index of the treasurer OpenGov track
	pub const TRACK_INDEX_TREASURER: u16 = 11;
	/// The index of the referendum canceller OpenGov track
	pub const TRACK_INDEX_REF_CANCELLER: u16 = 20;
	/// The index of the referendum killer OpenGov track
	pub const TRACK_INDEX_REF_KILLER: u16 = 21;

	/// Defensive weight parts that are used in LP related pallets.
	pub const LP_DEFENSIVE_WEIGHT_REF_TIME: u64 = 5_000_000_000;
	pub const LP_DEFENSIVE_WEIGHT_POV: u64 = 4096;

	/// Defensive weight for processing LP messages;
	pub const LP_DEFENSIVE_WEIGHT: Weight =
		Weight::from_parts(LP_DEFENSIVE_WEIGHT_REF_TIME, LP_DEFENSIVE_WEIGHT_POV);
}

/// Listing of parachains we integrate with.
/// For each parachain, we are interested in stating their parachain ID
/// as well as any of their token key ID that we possibly support in our
/// XCM configuration. These token keys are defined in said parachain
/// and must always match the value there defined, which is expected to
/// never change once defined since they help define the canonical id
/// of said tokens in the network, which is relevant for XCM transfers.
pub mod parachains {
	pub mod kusama {
		pub mod karura {
			pub const ID: u32 = 2000;
			pub const AUSD_KEY: &[u8] = &[0, 129];
		}

		pub mod altair {
			pub const ID: u32 = 2088;
			pub const AIR_KEY: &[u8] = crate::NATIVE_KEY;
		}
	}

	pub mod polkadot {
		pub mod acala {
			pub const ID: u32 = 2000;
			pub const AUSD_KEY: &[u8] = &[0, 1];
		}

		pub mod centrifuge {
			pub const ID: u32 = 2031;
			pub const CFG_KEY: &[u8] = crate::NATIVE_KEY;
		}
	}

	pub mod rococo {
		pub mod rocksmine {
			pub const ID: u32 = 1000;
			pub mod usdt {
				pub const PALLET_INSTANCE: u8 = 50;
				pub const GENERAL_INDEX: u128 = 1984;
			}
		}

		pub mod acala {
			pub const ID: u32 = 2000;
			pub const AUSD_KEY: &[u8] = &[0, 129];
		}
	}
}

pub mod liquidity_pools {
	/// The hashed prefix for currencies managed by LiquidityPools.
	pub struct GeneralCurrencyPrefix;

	impl sp_core::Get<[u8; 12]> for GeneralCurrencyPrefix {
		fn get() -> [u8; 12] {
			let hash: [u8; 16] =
				sp_io::hashing::blake2_128(&crate::constants::GENERAL_CURRENCY_INDEX_PREFIX);
			let (trimmed, _) = hash.split_at(12);

			trimmed
				.try_into()
				.expect("Should not fail to trim 16-length byte array to length 12")
		}
	}
}