import { OrderState } from '@0xproject/types';
import { LogEntryEvent } from 'ethereum-types';

export enum OrderWatcherError {
    SubscriptionAlreadyPresent = 'SUBSCRIPTION_ALREADY_PRESENT',
    SubscriptionNotFound = 'SUBSCRIPTION_NOT_FOUND',
}

export type EventWatcherCallback = (err: null | Error, log?: LogEntryEvent) => void;

/**
 * orderExpirationCheckingIntervalMs: How often to check for expired orders. Default=50.
 * eventPollingIntervalMs: How often to poll the Ethereum node for new events. Default=200.
 * expirationMarginMs: Amount of time before order expiry that you'd like to be notified
 * of an orders expiration. Default=0.
 * cleanupJobIntervalMs: How often to run a cleanup job which revalidates all the orders. Default=1hr.
 * isVerbose: Weather the order watcher should be verbose. Default=true.
 */
export interface OrderWatcherConfig {
    orderExpirationCheckingIntervalMs: number;
    eventPollingIntervalMs: number;
    expirationMarginMs: number;
    cleanupJobIntervalMs: number;
    isVerbose: boolean;
}

export type OnOrderStateChangeCallback = (err: Error | null, orderState?: OrderState) => void;

export enum InternalOrderWatcherError {
    NoAbiDecoder = 'NO_ABI_DECODER',
    ZrxNotInTokenRegistry = 'ZRX_NOT_IN_TOKEN_REGISTRY',
    WethNotInTokenRegistry = 'WETH_NOT_IN_TOKEN_REGISTRY',
}