import {
    BigNumber,
    ERC20BridgeSource,
    FillData,
    FillQuoteTransformerOrderType,
    UniswapV2FillData,
} from '../../../src/asset-swapper';
import {
    AffiliateFeeAmount,
    AffiliateFeeType,
    FillBase,
    IPath,
    MarketBuySwapQuote,
    MarketOperation,
    MarketSellSwapQuote,
    OptimizedMarketBridgeOrder,
    OptimizedOrdersByType,
    SwapQuote,
    TwoHopOrder,
} from '../../../src/asset-swapper/types';
import { MAX_UINT256 } from '../../../src/asset-swapper/utils/market_operation_utils/constants';
import { DODOFillData, VelodromeFillData } from '../../../src/asset-swapper/utils/market_operation_utils/types';
import { NULL_ADDRESS } from '../../constants';
import { randomAddress } from '../../utils/random';

export const ONE_ETHER = new BigNumber(1e18);

export const NO_AFFILIATE_FEE: AffiliateFeeAmount = {
    feeType: AffiliateFeeType.None,
    recipient: NULL_ADDRESS,
    buyTokenFeeAmount: new BigNumber(0),
    sellTokenFeeAmount: new BigNumber(0),
};

const testConstants = {
    UNISWAP_V2_ROUTER: randomAddress(),
    SUSHI_SWAP_ROUTER: randomAddress(),
    VELODROME_ROUTER: randomAddress(),
    DODO_POOL_ADDRESS: randomAddress(),
    DODO_HELPER_ADDRESS: randomAddress(),
};

function createFillData({
    source,
    takerToken,
    makerToken,
}: {
    source: ERC20BridgeSource;
    takerToken: string;
    makerToken: string;
}): FillData {
    switch (source) {
        case ERC20BridgeSource.UniswapV2:
        case ERC20BridgeSource.SushiSwap: {
            const fillData: UniswapV2FillData = {
                tokenAddressPath: [takerToken, makerToken],
                router:
                    source === ERC20BridgeSource.UniswapV2
                        ? testConstants.UNISWAP_V2_ROUTER
                        : testConstants.SUSHI_SWAP_ROUTER,
            };
            return fillData;
        }
        case ERC20BridgeSource.Dodo: {
            const fillData: DODOFillData = {
                poolAddress: testConstants.DODO_POOL_ADDRESS,
                isSellBase: false,
                helperAddress: testConstants.DODO_HELPER_ADDRESS,
            };
            return fillData;
        }
        case ERC20BridgeSource.Velodrome: {
            const fillData: VelodromeFillData = {
                router: testConstants.VELODROME_ROUTER,
                stable: false,
            };
            return fillData;
        }

        default:
            throw new Error(`createFillData: unimplemented source: ${source}`);
    }
}

interface BridgeOrderParams {
    source: ERC20BridgeSource;
    takerToken: string;
    makerToken: string;
    takerAmount: BigNumber;
    makerAmount: BigNumber;
}

function createBridgeOrder({
    source,
    takerToken,
    makerToken,
    takerAmount,
    makerAmount,
}: BridgeOrderParams): OptimizedMarketBridgeOrder {
    return {
        source,
        takerToken,
        makerToken,
        takerAmount,
        makerAmount,
        type: FillQuoteTransformerOrderType.Bridge,
        fillData: createFillData({ source, takerToken, makerToken }),
        // Currently unused by the tests that depends.
        fill: undefined as unknown as FillBase,
    };
}

interface TwoHopOrderParams {
    takerToken: string;
    intermediateToken: string;
    makerToken: string;
    firstHopSource: ERC20BridgeSource;
    secondHopSource: ERC20BridgeSource;
    takerAmount: BigNumber;
    makerAmount: BigNumber;
}
function createTwoHopOrder({
    takerToken,
    intermediateToken,
    makerAmount,
    firstHopSource,
    secondHopSource,
    takerAmount,
    makerToken,
}: TwoHopOrderParams): TwoHopOrder {
    const firstHopOrder = createBridgeOrder({
        source: firstHopSource,
        takerToken,
        makerToken: intermediateToken,
        takerAmount,
        makerAmount: new BigNumber(0),
    });

    const secondHopOrder = createBridgeOrder({
        source: secondHopSource,
        takerToken: intermediateToken,
        makerToken,
        takerAmount: MAX_UINT256,
        makerAmount,
    });
    return { firstHopOrder, secondHopOrder };
}

function createPathFromOrders(partialOrdersByType: Partial<OptimizedOrdersByType>): IPath {
    const ordersByType = {
        bridgeOrders: [],
        nativeOrders: [],
        twoHopOrders: [],
        ...partialOrdersByType,
    };
    const { bridgeOrders, nativeOrders, twoHopOrders } = ordersByType;
    const twoHopIndividualOrders = twoHopOrders.flatMap(({ firstHopOrder, secondHopOrder }) => [
        firstHopOrder,
        secondHopOrder,
    ]);
    0;
    const orders = [...bridgeOrders, ...nativeOrders, ...twoHopIndividualOrders];
    return {
        getOrders: () => orders,
        getSlippedOrders: () => orders,
        getOrdersByType: () => ordersByType,
        getSlippedOrdersByType: () => ordersByType,
        hasTwoHop: () => ordersByType.twoHopOrders.length > 0,
    };
}

interface CreatePathParams {
    bridgeOrderParams?: BridgeOrderParams[];
    twoHopOrderParams?: TwoHopOrderParams[];
    // TODO: support native
}

function createPath(params: CreatePathParams): IPath {
    const bridgeOrderParams = params.bridgeOrderParams || [];
    const twoHopOrderParams = params.twoHopOrderParams || [];

    return createPathFromOrders({
        bridgeOrders: bridgeOrderParams.map(createBridgeOrder),
        twoHopOrders: twoHopOrderParams.map(createTwoHopOrder),
    });
}

export function createSwapQuote({
    side,
    takerToken,
    makerToken,
    takerAmount,
    makerAmount,
    createPathParams,
    slippage,
    takerAmountPerEth,
    makerAmountPerEth,
    gasPrice,
}: {
    side: MarketOperation;
    takerToken: string;
    makerToken: string;
    takerAmount: BigNumber;
    makerAmount: BigNumber;
    createPathParams: CreatePathParams;
    slippage?: number;
    takerAmountPerEth?: BigNumber;
    makerAmountPerEth?: BigNumber;
    gasPrice?: number;
}): SwapQuote {
    // NOTES: consider using `slippage` to generate different amounts for `worstCaseQuoteInfo` and
    // slipped orders of `path`.
    return {
        ...(side === MarketOperation.Buy
            ? { type: MarketOperation.Buy, makerTokenFillAmount: makerAmount }
            : { type: MarketOperation.Sell, takerTokenFillAmount: takerAmount }),
        takerToken,
        makerToken,
        gasPrice: new BigNumber(gasPrice || 0),
        path: createPath(createPathParams),
        bestCaseQuoteInfo: {
            takerAmount,
            makerAmount,
            totalTakerAmount: takerAmount,
            protocolFeeInWeiAmount: new BigNumber(0),
            gas: 42,
            slippage: 0,
        },
        worstCaseQuoteInfo: {
            takerAmount,
            makerAmount,
            totalTakerAmount: takerAmount,
            protocolFeeInWeiAmount: new BigNumber(0),
            gas: 42,
            slippage: slippage || 0,
        },
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        sourceBreakdown: {} as any,
        makerTokenDecimals: 18,
        takerTokenDecimals: 18,
        takerAmountPerEth: takerAmountPerEth || new BigNumber(0),
        makerAmountPerEth: makerAmountPerEth || new BigNumber(0),
        blockNumber: 424242,
        samplerGasUsage: 1_000_000,
    };
}

function createSimpleSwapQuoteWithBridgeOrder({
    side,
    source,
    takerToken,
    makerToken,
    takerAmount,
    makerAmount,
    slippage,
    takerAmountPerEth,
    makerAmountPerEth,
    gasPrice,
}: {
    side: MarketOperation;
    source: ERC20BridgeSource;
    takerToken: string;
    makerToken: string;
    takerAmount: BigNumber;
    makerAmount: BigNumber;
    slippage: number;
    takerAmountPerEth?: BigNumber;
    makerAmountPerEth?: BigNumber;
    gasPrice?: number;
}): SwapQuote {
    return createSwapQuote({
        side,
        takerToken,
        makerToken,
        takerAmount,
        makerAmount,
        createPathParams: {
            bridgeOrderParams: [
                {
                    takerToken,
                    makerToken,
                    takerAmount,
                    makerAmount,
                    source,
                },
            ],
        },
        slippage,
        takerAmountPerEth,
        makerAmountPerEth,
        gasPrice,
    });
}

export function createSimpleSellSwapQuoteWithBridgeOrder(params: {
    source: ERC20BridgeSource;
    takerToken: string;
    makerToken: string;
    takerAmount: BigNumber;
    makerAmount: BigNumber;
    slippage: number;
    takerAmountPerEth?: BigNumber;
    makerAmountPerEth?: BigNumber;
    gasPrice?: number;
}): MarketSellSwapQuote {
    return createSimpleSwapQuoteWithBridgeOrder({
        side: MarketOperation.Sell,
        ...params,
    }) as MarketSellSwapQuote;
}

export function createSimpleBuySwapQuoteWithBridgeOrder(params: {
    source: ERC20BridgeSource;
    takerToken: string;
    makerToken: string;
    takerAmount: BigNumber;
    makerAmount: BigNumber;
    slippage: number;
    takerAmountPerEth?: BigNumber;
    makerAmountPerEth?: BigNumber;
    gasPrice?: number;
}): MarketBuySwapQuote {
    return createSimpleSwapQuoteWithBridgeOrder({
        side: MarketOperation.Buy,
        ...params,
    }) as MarketBuySwapQuote;
}

export function createTwoHopSellQuote({
    takerToken,
    intermediateToken,
    makerToken,
    firstHopSource,
    secondHopSource,
    takerAmount,
    makerAmount,
    slippage,
    takerAmountPerEth,
    makerAmountPerEth,
    gasPrice,
}: {
    takerToken: string;
    intermediateToken: string;
    makerToken: string;
    firstHopSource: ERC20BridgeSource;
    secondHopSource: ERC20BridgeSource;
    takerAmount: BigNumber;
    makerAmount: BigNumber;
    slippage?: number;
    takerAmountPerEth?: BigNumber;
    makerAmountPerEth?: BigNumber;
    gasPrice?: number;
}): MarketSellSwapQuote {
    return createSwapQuote({
        side: MarketOperation.Sell,
        takerToken,
        makerToken,
        takerAmount,
        makerAmount,
        createPathParams: {
            twoHopOrderParams: [
                {
                    takerToken,
                    intermediateToken,
                    makerToken,
                    firstHopSource,
                    secondHopSource,
                    takerAmount,
                    makerAmount,
                },
            ],
        },
        slippage,
        takerAmountPerEth,
        makerAmountPerEth,
        gasPrice,
    }) as MarketSellSwapQuote;
}