// Copyright 2020 Parity Technologies (UK) Ltd.
// This file is part of Polkadot.

// Polkadot 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.

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

use xcm::v0::SendXcm;
use frame_support::dispatch::{Dispatchable, Parameter};
use frame_support::weights::{PostDispatchInfo, GetDispatchInfo};
use crate::traits::{
	TransactAsset, ConvertOrigin, FilterAssetLocation, InvertLocation, ShouldExecute, WeightTrader, WeightBounds,
	OnResponse,
};

/// The trait to parametrize the `XcmExecutor`.
pub trait Config {
	/// The outer call dispatch type.
	type Call: Parameter + Dispatchable<PostInfo=PostDispatchInfo> + GetDispatchInfo;

	/// How to send an onward XCM message.
	type XcmSender: SendXcm;

	/// How to withdraw and deposit an asset.
	type AssetTransactor: TransactAsset;

	/// How to get a call origin from a `OriginKind` value.
	type OriginConverter: ConvertOrigin<<Self::Call as Dispatchable>::Origin>;

	/// Combinations of (Location, Asset) pairs which we unilateral trust as reserves.
	type IsReserve: FilterAssetLocation;

	/// Combinations of (Location, Asset) pairs which we bilateral trust as teleporters.
	type IsTeleporter: FilterAssetLocation;

	/// Means of inverting a location.
	type LocationInverter: InvertLocation;

	/// Whether we should execute the given XCM at all.
	type Barrier: ShouldExecute;

	/// The means of determining an XCM message's weight.
	type Weigher: WeightBounds<Self::Call>;

	/// The means of purchasing weight credit for XCM execution.
	type Trader: WeightTrader;

	/// What to do when a response of a query is found.
	type ResponseHandler: OnResponse;
}