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// 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.

use frame_support::traits::UnixTime;
use parity_scale_codec::{Decode, Encode};
use scale_info::{build::Fields, Path, Type, TypeInfo};
use sp_std::{cmp::PartialEq, marker::PhantomData};

/// A struct we need as the pallets implementing trait Time
/// do not implement TypeInfo. This wraps this and implements everything
/// manually.
#[derive(Encode, Decode, Eq, PartialEq, Debug, Clone)]
pub struct TimeProvider<T>(PhantomData<T>);

impl<T> UnixTime for TimeProvider<T>
where
	T: UnixTime,
{
	fn now() -> core::time::Duration {
		<T as UnixTime>::now()
	}
}

impl<T> TypeInfo for TimeProvider<T> {
	type Identity = ();

	fn type_info() -> Type {
		Type::builder()
			.path(Path::new("TimeProvider", module_path!()))
			.docs(&["A wrapper around a T that provides a trait Time implementation. Should be filtered out."])
			.composite(Fields::unit())
	}
}