// Copyright (C) Moondance Labs Ltd.

// This file is part of Tanssi.

// Tanssi 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.

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

#![cfg_attr(not(feature = "std"), no_std)]

use core::marker::PhantomData;

use frame_support::traits::{

    fungible::{InspectHold, Mutate, MutateHold},

    tokens::{Precision, Preservation},

};

use frame_support::{Deserialize, Serialize};

use pallet_stream_payment::HoldReason;

use parity_scale_codec::MaxEncodedLen;

use primitives::{AccountId, Balance, BlockNumber};

use sp_runtime::traits::{Block, Header};

use tp_traits::{apply, derive_storage_traits};

tp_traits::alias!(

    pub trait RuntimeConfigs:

        frame_system::Config<AccountId = AccountId, Block: Block<Header: Header<Number = BlockNumber>>> +

        pallet_balances::Config<Balance = Balance, RuntimeHoldReason: From<HoldReason>> +

        pallet_timestamp::Config<Moment = u64>

);

pub type StreamId = u64;

#[apply(derive_storage_traits)]

pub enum AssetId {

    // TODO: Support more assets like foreign assets

}

pub struct AssetsManager<Runtime>(PhantomData<Runtime>);

impl<Runtime: RuntimeConfigs> pallet_stream_payment::AssetsManager<AccountId, AssetId, Balance>

    for AssetsManager<Runtime>

{

            }

        }

    /// Benchmarks: should return the asset id which has the worst performance when interacting

    /// with it.

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

    fn bench_worst_case_asset_id() -> AssetId {

        AssetId::Native

    }

    /// Benchmarks: should return the another asset id which has the worst performance when interacting

    /// with it afther `bench_worst_case_asset_id`. This is to benchmark the worst case when changing config

    /// from one asset to another.

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

    fn bench_worst_case_asset_id2() -> AssetId {

        AssetId::Native

    }

    /// Benchmarks: should set the balance for the asset id returned by `bench_worst_case_asset_id`.

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

    fn bench_set_balance(asset_id: &AssetId, account: &AccountId, amount: Balance) {

        use frame_support::traits::fungible::Mutate;

        // only one asset id

        let AssetId::Native = asset_id;

        pallet_balances::Pallet::<Runtime>::set_balance(account, amount);

    }

}

#[apply(derive_storage_traits)]

pub enum TimeUnit {

    // TODO: Container chains/relay block number?

}

pub struct TimeProvider<Runtime>(PhantomData<Runtime>);

impl<Runtime: RuntimeConfigs> pallet_stream_payment::TimeProvider<TimeUnit, Balance>

    for TimeProvider<Runtime>

{

        }

    /// Benchmarks: should return the time unit which has the worst performance calling

    /// `TimeProvider::now(unit)` with.

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

    fn bench_worst_case_time_unit() -> TimeUnit {

        // Both BlockNumber and Timestamp cost the same (1 db read), but overriding timestamp

        // doesn't work well in benches, while block number works fine.

        TimeUnit::BlockNumber

    }

    /// Benchmarks: sets the "now" time for time unit returned by `worst_case_time_unit`.

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

    fn bench_set_now(instant: Balance) {

        frame_system::Pallet::<Runtime>::set_block_number(instant as u32)

    }

}