import * as Web3 from 'web3';

export enum ZeroExError {
    ContractDoesNotExist = 'CONTRACT_DOES_NOT_EXIST',
    ExchangeContractDoesNotExist = 'EXCHANGE_CONTRACT_DOES_NOT_EXIST',
    UnhandledError = 'UNHANDLED_ERROR',
    UserHasNoAssociatedAddress = 'USER_HAS_NO_ASSOCIATED_ADDRESSES',
    InvalidSignature = 'INVALID_SIGNATURE',
    ContractNotDeployedOnNetwork = 'CONTRACT_NOT_DEPLOYED_ON_NETWORK',
    ZrxNotInTokenRegistry = 'ZRX_NOT_IN_TOKEN_REGISTRY',
    InsufficientAllowanceForTransfer = 'INSUFFICIENT_ALLOWANCE_FOR_TRANSFER',
    InsufficientBalanceForTransfer = 'INSUFFICIENT_BALANCE_FOR_TRANSFER',
    InsufficientEthBalanceForDeposit = 'INSUFFICIENT_ETH_BALANCE_FOR_DEPOSIT',
    InsufficientWEthBalanceForWithdrawal = 'INSUFFICIENT_WETH_BALANCE_FOR_WITHDRAWAL',
    InvalidJump = 'INVALID_JUMP',
    OutOfGas = 'OUT_OF_GAS',
    NoNetworkId = 'NO_NETWORK_ID',
}

/**
 * Elliptic Curve signature
 */
export interface ECSignature {
    v: number;
    r: string;
    s: string;
}

export type OrderAddresses = [string, string, string, string, string];

export type OrderValues = [BigNumber.BigNumber, BigNumber.BigNumber, BigNumber.BigNumber,
                           BigNumber.BigNumber, BigNumber.BigNumber, BigNumber.BigNumber];

export type EventCallbackAsync = (err: Error, event: ContractEvent) => Promise<void>;
export type EventCallbackSync = (err: Error, event: ContractEvent) => void;
export type EventCallback = EventCallbackSync|EventCallbackAsync;
export interface ContractEventObj {
    watch: (eventWatch: EventCallback) => void;
    stopWatching: () => void;
}
export type CreateContractEvent = (indexFilterValues: IndexedFilterValues,
                                   subscriptionOpts: SubscriptionOpts) => ContractEventObj;
export interface ExchangeContract extends Web3.ContractInstance {
    isValidSignature: {
        callAsync: (signerAddressHex: string, dataHex: string, v: number, r: string, s: string,
                    txOpts?: TxOpts) => Promise<boolean>;
    };
    LogFill: CreateContractEvent;
    LogCancel: CreateContractEvent;
    LogError: CreateContractEvent;
    ZRX_TOKEN_CONTRACT: {
        callAsync: () => Promise<string>;
    };
    getUnavailableTakerTokenAmount: {
        callAsync: (orderHash: string) => Promise<BigNumber.BigNumber>;
    };
    isRoundingError: {
        callAsync: (fillTakerAmount: BigNumber.BigNumber, takerTokenAmount: BigNumber.BigNumber,
                    makerTokenAmount: BigNumber.BigNumber, txOpts?: TxOpts) => Promise<boolean>;
    };
    fillOrder: {
        sendTransactionAsync: (orderAddresses: OrderAddresses, orderValues: OrderValues,
                               fillTakerTokenAmount: BigNumber.BigNumber,
                               shouldThrowOnInsufficientBalanceOrAllowance: boolean,
                               v: number, r: string, s: string, txOpts?: TxOpts) => Promise<string>;
        estimateGasAsync: (orderAddresses: OrderAddresses, orderValues: OrderValues,
                           fillTakerTokenAmount: BigNumber.BigNumber,
                           shouldThrowOnInsufficientBalanceOrAllowance: boolean,
                           v: number, r: string, s: string, txOpts?: TxOpts) => Promise<number>;
    };
    batchFillOrders: {
        sendTransactionAsync: (orderAddresses: OrderAddresses[], orderValues: OrderValues[],
                               fillTakerTokenAmounts: BigNumber.BigNumber[],
                               shouldThrowOnInsufficientBalanceOrAllowance: boolean,
                               v: number[], r: string[], s: string[], txOpts?: TxOpts) => Promise<string>;
        estimateGasAsync: (orderAddresses: OrderAddresses[], orderValues: OrderValues[],
                           fillTakerTokenAmounts: BigNumber.BigNumber[],
                           shouldThrowOnInsufficientBalanceOrAllowance: boolean,
                           v: number[], r: string[], s: string[], txOpts?: TxOpts) => Promise<number>;
    };
    fillOrdersUpTo: {
        sendTransactionAsync: (orderAddresses: OrderAddresses[], orderValues: OrderValues[],
                               fillTakerTokenAmount: BigNumber.BigNumber,
                               shouldThrowOnInsufficientBalanceOrAllowance: boolean,
                               v: number[], r: string[], s: string[], txOpts?: TxOpts) => Promise<string>;
        estimateGasAsync: (orderAddresses: OrderAddresses[], orderValues: OrderValues[],
                           fillTakerTokenAmount: BigNumber.BigNumber,
                           shouldThrowOnInsufficientBalanceOrAllowance: boolean,
                           v: number[], r: string[], s: string[], txOpts?: TxOpts) => Promise<number>;
    };
    cancelOrder: {
        sendTransactionAsync: (orderAddresses: OrderAddresses, orderValues: OrderValues,
                               cancelTakerTokenAmount: BigNumber.BigNumber, txOpts?: TxOpts) => Promise<string>;
        estimateGasAsync: (orderAddresses: OrderAddresses, orderValues: OrderValues,
                           cancelTakerTokenAmount: BigNumber.BigNumber,
                           txOpts?: TxOpts) => Promise<number>;
    };
    batchCancelOrders: {
        sendTransactionAsync: (orderAddresses: OrderAddresses[], orderValues: OrderValues[],
                               cancelTakerTokenAmounts: BigNumber.BigNumber[], txOpts?: TxOpts) => Promise<string>;
        estimateGasAsync: (orderAddresses: OrderAddresses[], orderValues: OrderValues[],
                           cancelTakerTokenAmounts: BigNumber.BigNumber[],
                           txOpts?: TxOpts) => Promise<number>;
    };
    fillOrKillOrder: {
        sendTransactionAsync: (orderAddresses: OrderAddresses, orderValues: OrderValues,
                               fillTakerTokenAmount: BigNumber.BigNumber,
                               v: number, r: string, s: string, txOpts?: TxOpts) => Promise<string>;
        estimateGasAsync: (orderAddresses: OrderAddresses, orderValues: OrderValues,
                           fillTakerTokenAmount: BigNumber.BigNumber,
                           v: number, r: string, s: string, txOpts?: TxOpts) => Promise<number>;
    };
    batchFillOrKillOrders: {
        sendTransactionAsync: (orderAddresses: OrderAddresses[], orderValues: OrderValues[],
                               fillTakerTokenAmounts: BigNumber.BigNumber[],
                               v: number[], r: string[], s: string[], txOpts: TxOpts) => Promise<string>;
        estimateGasAsync: (orderAddresses: OrderAddresses[], orderValues: OrderValues[],
                           fillTakerTokenAmounts: BigNumber.BigNumber[],
                           v: number[], r: string[], s: string[], txOpts?: TxOpts) => Promise<number>;
    };
    filled: {
        callAsync: (orderHash: string) => Promise<BigNumber.BigNumber>;
    };
    cancelled: {
        callAsync: (orderHash: string) => Promise<BigNumber.BigNumber>;
    };
    getOrderHash: {
        callAsync: (orderAddresses: OrderAddresses, orderValues: OrderValues) => Promise<string>;
    };
}

export interface TokenContract extends Web3.ContractInstance {
    Transfer: CreateContractEvent;
    Approval: CreateContractEvent;
    balanceOf: {
        callAsync: (address: string) => Promise<BigNumber.BigNumber>;
    };
    allowance: {
        callAsync: (ownerAddress: string, allowedAddress: string) => Promise<BigNumber.BigNumber>;
    };
    transfer: {
        sendTransactionAsync: (toAddress: string, amountInBaseUnits: BigNumber.BigNumber,
                               txOpts?: TxOpts) => Promise<string>;
    };
    transferFrom: {
        sendTransactionAsync: (fromAddress: string, toAddress: string, amountInBaseUnits: BigNumber.BigNumber,
                               txOpts?: TxOpts) => Promise<string>;
    };
    approve: {
        sendTransactionAsync: (proxyAddress: string, amountInBaseUnits: BigNumber.BigNumber,
                               txOpts?: TxOpts) => Promise<string>;
    };
}

export interface TokenRegistryContract extends Web3.ContractInstance {
    getTokenMetaData: {
        callAsync: (address: string) => Promise<TokenMetadata>;
    };
    getTokenAddresses: {
        callAsync: () => Promise<string[]>;
    };
    getTokenAddressBySymbol: {
        callAsync: (symbol: string) => Promise<string>;
    };
    getTokenAddressByName: {
        callAsync: (name: string) => Promise<string>;
    };
    getTokenBySymbol: {
        callAsync: (symbol: string) => Promise<TokenMetadata>;
    };
    getTokenByName: {
        callAsync: (name: string) => Promise<TokenMetadata>;
    };
}

export interface EtherTokenContract extends Web3.ContractInstance {
    deposit: {
        sendTransactionAsync: (txOpts: TxOpts) => Promise<string>;
    };
    withdraw: {
        sendTransactionAsync: (amount: BigNumber.BigNumber, txOpts: TxOpts) => Promise<string>;
    };
}

export interface TokenTransferProxyContract extends Web3.ContractInstance {
    getAuthorizedAddresses: {
        callAsync: () => Promise<string[]>;
    };
    authorized: {
        callAsync: (address: string) => Promise<boolean>;
    };
}

export enum SolidityTypes {
    Address = 'address',
    Uint256 = 'uint256',
}

export enum ExchangeContractErrCodes {
    ERROR_FILL_EXPIRED, // Order has already expired
    ERROR_FILL_NO_VALUE, // Order has already been fully filled or cancelled
    ERROR_FILL_TRUNCATION, // Rounding error too large
    ERROR_FILL_BALANCE_ALLOWANCE, // Insufficient balance or allowance for token transfer
    ERROR_CANCEL_EXPIRED, // Order has already expired
    ERROR_CANCEL_NO_VALUE, // Order has already been fully filled or cancelled
}

export enum ExchangeContractErrs {
    OrderFillExpired = 'ORDER_FILL_EXPIRED',
    OrderCancelExpired = 'ORDER_CANCEL_EXPIRED',
    OrderCancelAmountZero = 'ORDER_CANCEL_AMOUNT_ZERO',
    OrderAlreadyCancelledOrFilled = 'ORDER_ALREADY_CANCELLED_OR_FILLED',
    OrderFillAmountZero = 'ORDER_FILL_AMOUNT_ZERO',
    OrderRemainingFillAmountZero = 'ORDER_REMAINING_FILL_AMOUNT_ZERO',
    OrderFillRoundingError = 'ORDER_FILL_ROUNDING_ERROR',
    FillBalanceAllowanceError = 'FILL_BALANCE_ALLOWANCE_ERROR',
    InsufficientTakerBalance = 'INSUFFICIENT_TAKER_BALANCE',
    InsufficientTakerAllowance = 'INSUFFICIENT_TAKER_ALLOWANCE',
    InsufficientMakerBalance = 'INSUFFICIENT_MAKER_BALANCE',
    InsufficientMakerAllowance = 'INSUFFICIENT_MAKER_ALLOWANCE',
    InsufficientTakerFeeBalance = 'INSUFFICIENT_TAKER_FEE_BALANCE',
    InsufficientTakerFeeAllowance = 'INSUFFICIENT_TAKER_FEE_ALLOWANCE',
    InsufficientMakerFeeBalance = 'INSUFFICIENT_MAKER_FEE_BALANCE',
    InsufficientMakerFeeAllowance = 'INSUFFICIENT_MAKER_FEE_ALLOWANCE',
    TransactionSenderIsNotFillOrderTaker = 'TRANSACTION_SENDER_IS_NOT_FILL_ORDER_TAKER',
    MultipleMakersInSingleCancelBatchDisallowed = 'MULTIPLE_MAKERS_IN_SINGLE_CANCEL_BATCH_DISALLOWED',
    InsufficientRemainingFillAmount = 'INSUFFICIENT_REMAINING_FILL_AMOUNT',
    MultipleTakerTokensInFillUpToDisallowed = 'MULTIPLE_TAKER_TOKENS_IN_FILL_UP_TO_DISALLOWED',
    BatchOrdersMustHaveSameExchangeAddress = 'BATCH_ORDERS_MUST_HAVE_SAME_EXCHANGE_ADDRESS',
    BatchOrdersMustHaveAtLeastOneItem = 'BATCH_ORDERS_MUST_HAVE_AT_LEAST_ONE_ITEM',
}

export interface ContractEvent {
    logIndex: number;
    transactionIndex: number;
    transactionHash: string;
    blockHash: string;
    blockNumber: number;
    address: string;
    type: string;
    event: string;
    args: ContractEventArgs;
}

export interface LogFillContractEventArgs {
    maker: string;
    taker: string;
    feeRecipient: string;
    makerToken: string;
    takerToken: string;
    filledMakerTokenAmount: BigNumber.BigNumber;
    filledTakerTokenAmount: BigNumber.BigNumber;
    paidMakerFee: BigNumber.BigNumber;
    paidTakerFee: BigNumber.BigNumber;
    tokens: string;
    orderHash: string;
}
export interface LogCancelContractEventArgs {
    maker: string;
    feeRecipient: string;
    makerToken: string;
    takerToken: string;
    cancelledMakerTokenAmount: BigNumber.BigNumber;
    cancelledTakerTokenAmount: BigNumber.BigNumber;
    tokens: string;
    orderHash: string;
}
export interface LogErrorContractEventArgs {
    errorId: BigNumber.BigNumber;
    orderHash: string;
}
export type ExchangeContractEventArgs = LogFillContractEventArgs|LogCancelContractEventArgs|LogErrorContractEventArgs;
export interface TransferContractEventArgs {
    _from: string;
    _to: string;
    _value: BigNumber.BigNumber;
}
export interface ApprovalContractEventArgs {
    _owner: string;
    _spender: string;
    _value: BigNumber.BigNumber;
}
export type TokenContractEventArgs = TransferContractEventArgs|ApprovalContractEventArgs;
export type ContractEventArgs = ExchangeContractEventArgs|TokenContractEventArgs;
export type ContractEventArg = string|BigNumber.BigNumber;

export interface Order {
    maker: string;
    taker: string;
    makerFee: BigNumber.BigNumber;
    takerFee: BigNumber.BigNumber;
    makerTokenAmount: BigNumber.BigNumber;
    takerTokenAmount: BigNumber.BigNumber;
    makerTokenAddress: string;
    takerTokenAddress: string;
    salt: BigNumber.BigNumber;
    exchangeContractAddress: string;
    feeRecipient: string;
    expirationUnixTimestampSec: BigNumber.BigNumber;
}

export interface SignedOrder extends Order {
    ecSignature: ECSignature;
}

//                          [address, name, symbol, decimals, ipfsHash, swarmHash]
export type TokenMetadata = [string, string, string, BigNumber.BigNumber, string, string];

export interface Token {
    name: string;
    address: string;
    symbol: string;
    decimals: number;
}

export interface TxOpts {
    from: string;
    gas?: number;
    value?: BigNumber.BigNumber;
}

export interface TokenAddressBySymbol {
    [symbol: string]: string;
}

export enum ExchangeEvents {
    LogFill = 'LogFill',
    LogCancel = 'LogCancel',
    LogError = 'LogError',
}

export enum TokenEvents {
    Transfer = 'Transfer',
    Approval = 'Approval',
}

export interface IndexedFilterValues {
    [index: string]: ContractEventArg;
}

export type BlockParam = 'latest'|'earliest'|'pending'|number;

export interface SubscriptionOpts {
    fromBlock: BlockParam;
    toBlock: BlockParam;
}

export type DoneCallback = (err?: Error) => void;

export interface OrderFillOrKillRequest {
    signedOrder: SignedOrder;
    fillTakerAmount: BigNumber.BigNumber;
}

export interface OrderCancellationRequest {
    order: Order|SignedOrder;
    takerTokenCancelAmount: BigNumber.BigNumber;
}

export interface OrderFillRequest {
    signedOrder: SignedOrder;
    takerTokenFillAmount: BigNumber.BigNumber;
}

export type AsyncMethod = (...args: any[]) => Promise<any>;

export interface ContractEventEmitter {
    watch: (eventCallback: EventCallback) => void;
    stopWatchingAsync: () => Promise<void>;
}

/**
 * We re-export the `Web3.Provider` type specified in the Web3 Typescript typings
 * since it is the type of the `provider` argument to the `ZeroEx` constructor.
 * It is however a `Web3` library type, not a native `0x.js` type.
 */
export type Web3Provider = Web3.Provider;

export interface ExchangeContractByAddress {
    [address: string]: ExchangeContract;
}

export interface JSONRPCPayload {
    params: any[];
    method: string;
}

export interface ZeroExConfig {
    gasPrice?: BigNumber.BigNumber; // Gas price to use with every transaction
}

export type TransactionReceipt = Web3.TransactionReceipt;