/* eslint-disable @typescript-eslint/member-ordering -- TODO: remove when instance methods aren't members */
/* eslint-disable max-lines -- Client is a large file w/ lots of imports/exports */
import * as assert from 'assert'
import { EventEmitter } from 'events'

import { NotFoundError, ValidationError, XrplError } from '../errors'
import {
  Request,
  Response,
  // account methods
  AccountChannelsRequest,
  AccountChannelsResponse,
  AccountCurrenciesRequest,
  AccountCurrenciesResponse,
  AccountInfoRequest,
  AccountInfoResponse,
  AccountLinesRequest,
  AccountLinesResponse,
  AccountNFTsRequest,
  AccountNFTsResponse,
  AccountObjectsRequest,
  AccountObjectsResponse,
  AccountOffersRequest,
  AccountOffersResponse,
  AccountTxRequest,
  AccountTxResponse,
  GatewayBalancesRequest,
  GatewayBalancesResponse,
  NoRippleCheckRequest,
  NoRippleCheckResponse,
  // ledger methods
  LedgerRequest,
  LedgerResponse,
  LedgerClosedRequest,
  LedgerClosedResponse,
  LedgerCurrentRequest,
  LedgerCurrentResponse,
  LedgerDataRequest,
  LedgerDataResponse,
  LedgerEntryRequest,
  LedgerEntryResponse,
  // transaction methods
  SubmitRequest,
  SubmitResponse,
  SubmitMultisignedRequest,
  SubmitMultisignedResponse,
  TransactionEntryRequest,
  TransactionEntryResponse,
  TxRequest,
  TxResponse,
  // path and order book methods
  BookOffersRequest,
  BookOffersResponse,
  DepositAuthorizedRequest,
  DepositAuthorizedResponse,
  PathFindRequest,
  PathFindResponse,
  RipplePathFindRequest,
  RipplePathFindResponse,
  // payment channel methods
  ChannelVerifyRequest,
  ChannelVerifyResponse,
  // server info methods
  FeeRequest,
  FeeResponse,
  ManifestRequest,
  ManifestResponse,
  ServerInfoRequest,
  ServerInfoResponse,
  ServerStateRequest,
  ServerStateResponse,
  // utility methods
  PingRequest,
  PingResponse,
  RandomRequest,
  RandomResponse,
  LedgerStream,
  ValidationStream,
  TransactionStream,
  PathFindStream,
  PeerStatusStream,
  ConsensusStream,
  SubscribeRequest,
  SubscribeResponse,
  UnsubscribeRequest,
  UnsubscribeResponse,
  // NFT methods
  NFTBuyOffersRequest,
  NFTBuyOffersResponse,
  NFTSellOffersRequest,
  NFTSellOffersResponse,
} from '../models/methods'
import { BaseRequest, BaseResponse } from '../models/methods/baseMethod'
import {
  autofill,
  ensureClassicAddress,
  getLedgerIndex,
  getOrderbook,
  getBalances,
  getXrpBalance,
  submit,
  submitAndWait,
} from '../sugar'
import fundWallet from '../Wallet/fundWallet'

import {
  Connection,
  ConnectionUserOptions,
  INTENTIONAL_DISCONNECT_CODE,
} from './connection'
import {
  handlePartialPayment,
  handleStreamPartialPayment,
} from './partialPayment'

export interface ClientOptions extends ConnectionUserOptions {
  feeCushion?: number
  maxFeeXRP?: string
  proxy?: string
  timeout?: number
}

/**
 * Get the response key / property name that contains the listed data for a
 * command. This varies from command to command, but we need to know it to
 * properly count across many requests.
 *
 * @param command - The rippled request command.
 * @returns The property key corresponding to the command.
 */
function getCollectKeyFromCommand(command: string): string | null {
  switch (command) {
    case 'account_channels':
      return 'channels'
    case 'account_lines':
      return 'lines'
    case 'account_objects':
      return 'account_objects'
    case 'account_tx':
      return 'transactions'
    case 'account_offers':
    case 'book_offers':
      return 'offers'
    case 'ledger_data':
      return 'state'
    default:
      return null
  }
}

function clamp(value: number, min: number, max: number): number {
  assert.ok(min <= max, 'Illegal clamp bounds')
  return Math.min(Math.max(value, min), max)
}

interface MarkerRequest extends BaseRequest {
  limit?: number
  marker?: unknown
}

interface MarkerResponse extends BaseResponse {
  result: {
    marker?: unknown
  }
}

const DEFAULT_FEE_CUSHION = 1.2
const DEFAULT_MAX_FEE_XRP = '2'

const MIN_LIMIT = 10
const MAX_LIMIT = 400

const NORMAL_DISCONNECT_CODE = 1000

/**
 * Client for interacting with rippled servers.
 *
 * @category Clients
 */
class Client extends EventEmitter {
  /*
   * Underlying connection to rippled.
   */
  public readonly connection: Connection

  /**
   * Factor to multiply estimated fee by to provide a cushion in case the
   * required fee rises during submission of a transaction. Defaults to 1.2.
   *
   * @category Fee
   */
  public readonly feeCushion: number

  /**
   * Maximum transaction cost to allow, in decimal XRP. Must be a string-encoded
   * number. Defaults to '2'.
   *
   * @category Fee
   */
  public readonly maxFeeXRP: string

  /**
   * Creates a new Client with a websocket connection to a rippled server.
   *
   * @param server - URL of the server to connect to.
   * @param options - Options for client settings.
   * @category Constructor
   */
  // eslint-disable-next-line max-lines-per-function -- okay because we have to set up all the connection handlers
  public constructor(server: string, options: ClientOptions = {}) {
    super()
    if (typeof server !== 'string' || !/wss?(?:\+unix)?:\/\//u.exec(server)) {
      throw new ValidationError(
        'server URI must start with `wss://`, `ws://`, `wss+unix://`, or `ws+unix://`.',
      )
    }

    this.feeCushion = options.feeCushion ?? DEFAULT_FEE_CUSHION
    this.maxFeeXRP = options.maxFeeXRP ?? DEFAULT_MAX_FEE_XRP

    this.connection = new Connection(server, options)

    this.connection.on('error', (errorCode, errorMessage, data) => {
      this.emit('error', errorCode, errorMessage, data)
    })

    this.connection.on('connected', () => {
      this.emit('connected')
    })

    this.connection.on('disconnected', (code: number) => {
      let finalCode = code
      /*
       * 4000: Connection uses a 4000 code internally to indicate a manual disconnect/close
       * Since 4000 is a normal disconnect reason, we convert this to the standard exit code 1000
       */
      if (finalCode === INTENTIONAL_DISCONNECT_CODE) {
        finalCode = NORMAL_DISCONNECT_CODE
      }
      this.emit('disconnected', finalCode)
    })

    this.connection.on('ledgerClosed', (ledger) => {
      this.emit('ledgerClosed', ledger)
    })

    this.connection.on('transaction', (tx) => {
      // mutates `tx` to add warnings
      handleStreamPartialPayment(tx, this.connection.trace)
      this.emit('transaction', tx)
    })

    this.connection.on('validationReceived', (validation) => {
      this.emit('validationReceived', validation)
    })

    this.connection.on('manifestReceived', (manifest) => {
      this.emit('manifestReceived', manifest)
    })

    this.connection.on('peerStatusChange', (status) => {
      this.emit('peerStatusChange', status)
    })

    this.connection.on('consensusPhase', (consensus) => {
      this.emit('consensusPhase', consensus)
    })

    this.connection.on('path_find', (path) => {
      this.emit('path_find', path)
    })
  }

  /**
   * Get the url that the client is connected to.
   *
   * @returns The URL of the server this client is connected to.
   * @category Network
   */
  public get url(): string {
    return this.connection.getUrl()
  }

  /**
   * @category Network
   */
  public async request(
    r: AccountChannelsRequest,
  ): Promise<AccountChannelsResponse>
  public async request(
    r: AccountCurrenciesRequest,
  ): Promise<AccountCurrenciesResponse>
  public async request(r: AccountInfoRequest): Promise<AccountInfoResponse>
  public async request(r: AccountLinesRequest): Promise<AccountLinesResponse>
  public async request(r: AccountNFTsRequest): Promise<AccountNFTsResponse>
  public async request(
    r: AccountObjectsRequest,
  ): Promise<AccountObjectsResponse>
  public async request(r: AccountOffersRequest): Promise<AccountOffersResponse>
  public async request(r: AccountTxRequest): Promise<AccountTxResponse>
  public async request(r: BookOffersRequest): Promise<BookOffersResponse>
  public async request(r: ChannelVerifyRequest): Promise<ChannelVerifyResponse>
  public async request(
    r: DepositAuthorizedRequest,
  ): Promise<DepositAuthorizedResponse>
  public async request(r: FeeRequest): Promise<FeeResponse>
  public async request(
    r: GatewayBalancesRequest,
  ): Promise<GatewayBalancesResponse>
  public async request(r: LedgerRequest): Promise<LedgerResponse>
  public async request(r: LedgerClosedRequest): Promise<LedgerClosedResponse>
  public async request(r: LedgerCurrentRequest): Promise<LedgerCurrentResponse>
  public async request(r: LedgerDataRequest): Promise<LedgerDataResponse>
  public async request(r: LedgerEntryRequest): Promise<LedgerEntryResponse>
  public async request(r: ManifestRequest): Promise<ManifestResponse>
  public async request(r: NFTBuyOffersRequest): Promise<NFTBuyOffersResponse>
  public async request(r: NFTSellOffersRequest): Promise<NFTSellOffersResponse>
  public async request(r: NoRippleCheckRequest): Promise<NoRippleCheckResponse>
  public async request(r: PathFindRequest): Promise<PathFindResponse>
  public async request(r: PingRequest): Promise<PingResponse>
  public async request(r: RandomRequest): Promise<RandomResponse>
  public async request(
    r: RipplePathFindRequest,
  ): Promise<RipplePathFindResponse>
  public async request(r: ServerInfoRequest): Promise<ServerInfoResponse>
  public async request(r: ServerStateRequest): Promise<ServerStateResponse>
  public async request(r: SubmitRequest): Promise<SubmitResponse>
  public async request(
    r: SubmitMultisignedRequest,
  ): Promise<SubmitMultisignedResponse>
  public request(r: SubscribeRequest): Promise<SubscribeResponse>
  public request(r: UnsubscribeRequest): Promise<UnsubscribeResponse>
  public async request(
    r: TransactionEntryRequest,
  ): Promise<TransactionEntryResponse>
  public async request(r: TxRequest): Promise<TxResponse>
  public async request<R extends BaseRequest, T extends BaseResponse>(
    r: R,
  ): Promise<T>
  /**
   * Makes a request to the client with the given command and
   * additional request body parameters.
   *
   * @param req - Request to send to the server.
   * @returns The response from the server.
   * @category Network
   */
  public async request<R extends Request, T extends Response>(
    req: R,
  ): Promise<T> {
    // eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Necessary for overloading
    const response = (await this.connection.request({
      ...req,
      account: req.account
        ? // eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Must be string
          ensureClassicAddress(req.account as string)
        : undefined,
    })) as T

    // mutates `response` to add warnings
    handlePartialPayment(req.command, response)

    return response
  }

  /**
   * @category Network
   */
  public async requestNextPage(
    req: AccountChannelsRequest,
    resp: AccountChannelsResponse,
  ): Promise<AccountChannelsResponse>
  public async requestNextPage(
    req: AccountLinesRequest,
    resp: AccountLinesResponse,
  ): Promise<AccountLinesResponse>
  public async requestNextPage(
    req: AccountObjectsRequest,
    resp: AccountObjectsResponse,
  ): Promise<AccountObjectsResponse>
  public async requestNextPage(
    req: AccountOffersRequest,
    resp: AccountOffersResponse,
  ): Promise<AccountOffersResponse>
  public async requestNextPage(
    req: AccountTxRequest,
    resp: AccountTxResponse,
  ): Promise<AccountTxResponse>
  public async requestNextPage(
    req: LedgerDataRequest,
    resp: LedgerDataResponse,
  ): Promise<LedgerDataResponse>
  /**
   * Requests the next page of data.
   *
   * @param req - Request to send.
   * @param resp - Response with the marker to use in the request.
   * @returns The response with the next page of data.
   */
  public async requestNextPage<
    T extends MarkerRequest,
    U extends MarkerResponse,
  >(req: T, resp: U): Promise<U> {
    if (!resp.result.marker) {
      return Promise.reject(
        new NotFoundError('response does not have a next page'),
      )
    }
    const nextPageRequest = { ...req, marker: resp.result.marker }
    // eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Necessary for overloading
    return this.request(nextPageRequest) as unknown as U
  }

  /**
   * Event handler for subscription streams.
   *
   * @example
   * ```ts
   * const api = new Client('wss://s.altnet.rippletest.net:51233')
   *
   * api.on('transactions', (tx: TransactionStream) => {
   *  console.log("Received Transaction")
   *  console.log(tx)
   * })
   *
   * await api.connect()
   * const response = await api.request({
   *     command: 'subscribe',
   *     streams: ['transactions_proposed']
   * })
   * ```
   *
   * @category Network
   */
  public on(event: 'connected', listener: () => void): this
  public on(event: 'disconnected', listener: (code: number) => void): this
  public on(
    event: 'ledgerClosed',
    listener: (ledger: LedgerStream) => void,
  ): this
  public on(
    event: 'validationReceived',
    listener: (validation: ValidationStream) => void,
  ): this
  public on(
    event: 'transaction',
    listener: (tx: TransactionStream) => void,
  ): this
  public on(
    event: 'peerStatusChange',
    listener: (status: PeerStatusStream) => void,
  ): this
  public on(
    event: 'consensusPhase',
    listener: (phase: ConsensusStream) => void,
  ): this
  public on(event: 'path_find', listener: (path: PathFindStream) => void): this
  // eslint-disable-next-line @typescript-eslint/no-explicit-any -- needs to be any for overload
  public on(event: 'error', listener: (...err: any[]) => void): this
  /**
   * Event handler for subscription streams.
   *
   * @param eventName - Name of the event. Only forwards streams.
   * @param listener - Function to run on event.
   * @returns This, because it inherits from EventEmitter.
   */
  // eslint-disable-next-line @typescript-eslint/no-explicit-any -- needs to be any for overload
  public on(eventName: string, listener: (...args: any[]) => void): this {
    return super.on(eventName, listener)
  }

  /**
   * @category Network
   */
  public async requestAll(
    req: AccountChannelsRequest,
  ): Promise<AccountChannelsResponse[]>
  public async requestAll(
    req: AccountLinesRequest,
  ): Promise<AccountLinesResponse[]>
  public async requestAll(
    req: AccountObjectsRequest,
  ): Promise<AccountObjectsResponse[]>
  public async requestAll(
    req: AccountOffersRequest,
  ): Promise<AccountOffersResponse[]>
  public async requestAll(req: AccountTxRequest): Promise<AccountTxResponse[]>
  public async requestAll(req: BookOffersRequest): Promise<BookOffersResponse[]>
  public async requestAll(req: LedgerDataRequest): Promise<LedgerDataResponse[]>
  /**
   * Makes multiple paged requests to the client to return a given number of
   * resources. Multiple paged requests will be made until the `limit`
   * number of resources is reached (if no `limit` is provided, a single request
   * will be made).
   *
   * If the command is unknown, an additional `collect` property is required to
   * know which response key contains the array of resources.
   *
   * NOTE: This command is used by existing methods and is not recommended for
   * general use. Instead, use rippled's built-in pagination and make multiple
   * requests as needed.
   *
   * @param request - The initial request to send to the server.
   * @param collect - (Optional) the param to use to collect the array of resources (only needed if command is unknown).
   * @returns The array of all responses.
   * @throws ValidationError if there is no collection key (either from a known command or for the unknown command).
   */
  public async requestAll<T extends MarkerRequest, U extends MarkerResponse>(
    request: T,
    collect?: string,
  ): Promise<U[]> {
    /*
     * The data under collection is keyed based on the command. Fail if command
     * not recognized and collection key not provided.
     */
    const collectKey = collect ?? getCollectKeyFromCommand(request.command)
    if (!collectKey) {
      throw new ValidationError(`no collect key for command ${request.command}`)
    }
    /*
     * If limit is not provided, fetches all data over multiple requests.
     * NOTE: This may return much more than needed. Set limit when possible.
     */
    const countTo: number = request.limit == null ? Infinity : request.limit
    let count = 0
    let marker: unknown = request.marker
    let lastBatchLength: number
    const results: U[] = []
    do {
      const countRemaining = clamp(countTo - count, MIN_LIMIT, MAX_LIMIT)
      const repeatProps = {
        ...request,
        limit: countRemaining,
        marker,
      }
      // eslint-disable-next-line no-await-in-loop -- Necessary for this, it really has to wait
      const singleResponse = await this.connection.request(repeatProps)
      // eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Should be true
      const singleResult = (singleResponse as U).result
      if (!(collectKey in singleResult)) {
        throw new XrplError(`${collectKey} not in result`)
      }
      // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment -- Should be true
      const collectedData = singleResult[collectKey]
      marker = singleResult.marker
      // eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Should be true
      results.push(singleResponse as U)
      // Make sure we handle when no data (not even an empty array) is returned.
      if (Array.isArray(collectedData)) {
        count += collectedData.length
        lastBatchLength = collectedData.length
      } else {
        lastBatchLength = 0
      }
    } while (Boolean(marker) && count < countTo && lastBatchLength !== 0)
    return results
  }

  /**
   * Tells the Client instance to connect to its rippled server.
   *
   * @returns A promise that resolves with a void value when a connection is established.
   * @category Network
   */
  public async connect(): Promise<void> {
    return this.connection.connect()
  }

  /**
   * Tells the Client instance to disconnect from it's rippled server.
   *
   * @returns A promise that resolves with a void value when a connection is destroyed.
   * @category Network
   */
  public async disconnect(): Promise<void> {
    /*
     * backwards compatibility: connection.disconnect() can return a number, but
     * this method returns nothing. SO we await but don't return any result.
     */
    await this.connection.disconnect()
  }

  /**
   * Checks if the Client instance is connected to its rippled server.
   *
   * @returns Whether the client instance is connected.
   * @category Network
   */
  public isConnected(): boolean {
    return this.connection.isConnected()
  }

  /**
   * @category Core
   */
  public autofill = autofill

  /**
   * @category Core
   */
  public submit = submit
  /**
   * @category Core
   */
  public submitAndWait = submitAndWait

  /**
   * @deprecated Use autofill instead, provided for users familiar with v1
   */
  public prepareTransaction = autofill

  /**
   * @category Abstraction
   */
  public getXrpBalance = getXrpBalance

  /**
   * @category Abstraction
   */
  public getBalances = getBalances

  /**
   * @category Abstraction
   */
  public getOrderbook = getOrderbook

  /**
   * @category Abstraction
   */
  public getLedgerIndex = getLedgerIndex

  /**
   * @category Faucet
   */
  public fundWallet = fundWallet
}

export { Client }