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// This file is part of the SORA network and Polkaswap app.

// Copyright (c) 2020, 2021, Polka Biome Ltd. All rights reserved.
// SPDX-License-Identifier: BSD-4-Clause

// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:

// Redistributions of source code must retain the above copyright notice, this list
// of conditions and the following disclaimer.
// Redistributions in binary form must reproduce the above copyright notice, this
// list of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// All advertising materials mentioning features or use of this software must display
// the following acknowledgement: This product includes software developed by Polka Biome
// Ltd., SORA, and Polkaswap.
//
// Neither the name of the Polka Biome Ltd. nor the names of its contributors may be used
// to endorse or promote products derived from this software without specific prior written permission.

// THIS SOFTWARE IS PROVIDED BY Polka Biome Ltd. AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Polka Biome Ltd. BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
// USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

use crate::{Error, OrderBookId, OrderVolume};
use assets::AssetIdOf;
use codec::{Decode, Encode, MaxEncodedLen};
use common::PriceVariant;
use core::fmt::Debug;
use frame_support::ensure;
use frame_support::sp_runtime::DispatchError;
use sp_runtime::traits::Zero;

#[derive(Encode, Decode, scale_info::TypeInfo, MaxEncodedLen, Clone, Debug)]
pub struct MarketOrder<T>
where
    T: crate::Config,
{
    pub owner: T::AccountId,
    pub direction: PriceVariant,
    pub order_book_id: OrderBookId<AssetIdOf<T>, T::DEXId>,

    /// Amount of OrderBookId `base` asset
    pub amount: OrderVolume,

    /// If defined the deal amount is transferred to `to` account,
    /// otherwise the `owner` receives deal amount
    pub to: Option<T::AccountId>,
}

impl<T: crate::Config> MarketOrder<T> {
    pub fn new(
        owner: T::AccountId,
        direction: PriceVariant,
        order_book_id: OrderBookId<AssetIdOf<T>, T::DEXId>,
        amount: OrderVolume,
        to: Option<T::AccountId>,
    ) -> Self {
        Self {
            owner,
            direction,
            order_book_id,
            amount,
            to,
        }
    }

    pub fn ensure_valid(&self) -> Result<(), DispatchError> {
        ensure!(!self.amount.is_zero(), Error::<T>::InvalidOrderAmount);
        Ok(())
    }
}