import {Decimal} from 'decimal.js'

export as namespace nkn

export = nkn

declare namespace nkn {
  export class MultiClient {
    addr: string
    identifier: string
    isClosed: boolean
    isReady: boolean
    defaultClient: Client

    constructor(options?: MultiClientOptions)

    close(): Promise<void>

    deleteName(name: string, options?: TransactionOptions): Promise<TxnOrHash>

    dial(remoteAddr: string, options?: DialOptions): Promise<Session>

    getBalance(address?: string): Promise<Amount>

    getRDCBalance(address?: string): Promise<Amount>

    getLatestBlock(): Promise<{
      height: number
      hash: string
    }>

    getNonce(address?: string, options?: { txPool: boolean }): Promise<number>

    getPublicKey(): string

    getRegistrant(name: string): Promise<{
      registrant: string
      expiresAt: number
    }>

    getSeed(): string

    getSubscribers(topic: string, options?: {
      offset?: number
      limit?: number
      meta?: boolean
      txPool?: boolean
    }): Promise<{
      subscribers: Array<string> | Record<string, string>
      subscribersInTxPool?: Array<string> | Record<string, string>
    }>

    getSubscribersCount(topic: string): Promise<number>

    getSubscription(topic: string, subscriber: string): Promise<{
      meta: string
      expiresAt: number
    }>

    listen(addrs: (RegExp | Array<RegExp> | string | Array<string> | null | void)): void

    onConnect(f: ConnectHandler): void

    onMessage(func: MessageHandler): void

    onSession(func: SessionHandler): void

    publish(topic: string, data: MessageData, options?: PublishOptions): Promise<null>

    readyClientIDs(): Array<string>

    registerName(name: string, options?: TransactionOptions): Promise<TxnOrHash>

    send(dest: Destination, data: MessageData, options?: SendOptions): Promise<ReplyData>

    sendTransaction(txn: Transaction): Promise<string>

    sendWithClient(clientID: string, dest: Destination, data: Uint8Array, options?: SendOptions): Promise<ReplyData>

    subscribe(topic: string, duration: number, identifier?: string, meta?: string, options?: TransactionOptions): Promise<TxnOrHash>

    transferName(name: string, recipient: string, options?: TransactionOptions): Promise<TxnOrHash>

    transferTo(toAddress: string, amount: (number | string | Amount), options?: TransactionOptions): Promise<TxnOrHash>

    transferRDCTo(toAddress: string, amount: (number | string | Amount), options?: TransactionOptions): Promise<TxnOrHash>

    swap(toAddress: string, amount: (number | string | Amount), options?: TransactionOptions): Promise<TxnOrHash>

    swapRDC(toAddress: string, amount: (number | string | Amount), options?: TransactionOptions): Promise<TxnOrHash>

    unsubscribe(topic: string, identifier: string, options?: TransactionOptions): Promise<TxnOrHash>
  }

  export class Client {
    addr: string
    identifier: string

    constructor(options?: ClientOptions)

    close(): void

    deleteName(name: string, options?: TransactionOptions): Promise<TxnOrHash>

    getBalance(address?: string): Promise<Amount>

    getRDCBalance(address?: string): Promise<Amount>

    getLatestBlock(): Promise<{ height: number, hash: string }>

    getNonce(address?: string, options?: {
      txPool: boolean
    }): Promise<number>

    getPublicKey(): string

    getRegistrant(name: string): Promise<{
      registrant: string
      expiresAt: number
    }>

    getSeed(): string

    getSubscribers(topic: string, options?: {
      offset?: number
      limit?: number
      meta?: boolean
      txPool?: boolean
    }): Promise<{
      subscribers: Array<string> | Record<string, string>
      subscribersInTxPool?: Array<string> | Record<string, string>
    }>

    getSubscribersCount(topic: string): Promise<number>

    getSubscription(topic: string, subscriber: string): Promise<{
      meta: string
      expiresAt: number
    }>

    onConnect(func: ConnectHandler): void

    onMessage(func: MessageHandler): void

    publish(topic: string, data: MessageData, options?: PublishOptions): Promise<null>

    registerName(name: string, options?: TransactionOptions): Promise<TxnOrHash>

    send(dest: Destination, data: MessageData, options?: SendOptions): Promise<ReplyData>

    sendTransaction(txn: Transaction): Promise<string>

    subscribe(topic: string, duration: number, identifier?: string, meta?: string, options?: TransactionOptions): Promise<TxnOrHash>

    transferName(name: string, recipient: string, options?: TransactionOptions): Promise<TxnOrHash>

    transferTo(toAddress: string, amount: (number | string | Amount), options?: TransactionOptions): Promise<TxnOrHash>

    transferRDCTo(toAddress: string, amount: (number | string | Amount), options?: TransactionOptions): Promise<TxnOrHash>

    swap(toAddress: string, amount: (number | string | Amount), options?: TransactionOptions): Promise<TxnOrHash>

    swapRDC(toAddress: string, amount: (number | string | Amount), options?: TransactionOptions): Promise<TxnOrHash>

    unsubscribe(topic: string, identifier: string, options?: TransactionOptions): Promise<TxnOrHash>
  }

  export class Wallet {
    address: string
    version: number

    constructor(options?: {
      seed?: string
      password?: string
      rpcServerAddr?: string
      iv?: string
      masterKey?: string
      scrypt?: ScryptParams
      worker?: boolean | (() => Worker | Promise<Worker>)
      passwordKey?: Record<string, string>
      version?: number
    })

    createOrUpdateNanoPay(
      toAddress: string,
      amount: (number | string | Amount),
      expiration: number,
      id: number,
      options?: TransactionOptions,
    ): Promise<Transaction>

    deleteName(name: string, options?: TransactionOptions): Promise<TxnOrHash>

    static fromJSON(walletJson: (string | WalletJson), options?: {
      password: string
      rpcServerAddr?: string
      async?: boolean
    }): (Wallet | Promise<Wallet>)

    static getBalance(address: string, options?: {
      rpcServerAddr: string
    }): Promise<Amount>

    static getRDCBalance(address: string, options?: {
      rpcServerAddr: string
    }): Promise<Amount>

    getBalance(address?: string): Promise<Amount>

    getRDCBalance(address?: string): Promise<Amount>

    static getLatestBlock(options?: {
      rpcServerAddr: string
    }): Promise<{
      height: number
      hash: string
    }>

    getLatestBlock(): Promise<{
      height: number
      hash: string
    }>

    static getNonce(address: string, options?: {
      rpcServerAddr: string
      txPool: boolean
    }): Promise<number>

    getNonce(address?: string, options?: { txPool: boolean }): Promise<number>

    getPublicKey(): string

    static getRegistrant(name: string, options?: {
      rpcServerAddr: string
    }): Promise<{
      registrant: string
      expiresAt: number
    }>

    getRegistrant(name: string): Promise<{
      registrant: string
      expiresAt: number
    }>

    getSeed(): string

    static getSubscribers(topic: string, options?: {
      offset?: number
      limit?: number
      meta?: boolean
      txPool?: boolean
      rpcServerAddr?: string
    }): Promise<{
      subscribers: Array<string> | Record<string, string>
      subscribersInTxPool?: Array<string> | Record<string, string>
    }>

    getSubscribers(topic: string, options?: {
      offset?: number
      limit?: number
      meta?: boolean
      txPool?: boolean
    }): Promise<{
      subscribers: Array<string> | Record<string, string>
      subscribersInTxPool?: Array<string> | Record<string, string>
    }>

    static getSubscribersCount(topic: string, options?: {
      rpcServerAddr: string
    }): Promise<number>

    getSubscribersCount(topic: string): Promise<number>

    static getSubscription(topic: string, subscriber: string, options?: {
      rpcServerAddr: string
    }): Promise<{
      meta: string
      expiresAt: number
    }>

    getSubscription(topic: string, subscriber: string): Promise<{
      meta: string
      expiresAt: number
    }>

    static publicKeyToAddress(publicKey: string): string

    registerName(name: string, options?: TransactionOptions): Promise<TxnOrHash>

    static sendTransaction(txn: Transaction, options?: {
      rpcServerAddr: string
    }): Promise<string>

    sendTransaction(txn: Transaction): Promise<string>

    subscribe(topic: string, duration: number, identifier: string, meta: string, options?: TransactionOptions): Promise<TxnOrHash>

    toJSON(): WalletJson

    transferName(name: string, recipient: string, options?: TransactionOptions): Promise<TxnOrHash>

    transferTo(toAddress: string, amount: (number | string | Amount), options?: TransactionOptions): Promise<TxnOrHash>

    transferRDCTo(toAddress: string, amount: (number | string | Amount), options?: TransactionOptions): Promise<TxnOrHash>

    swap(toAddress: string, amount: (number | string | Amount), options?: TransactionOptions): Promise<TxnOrHash>

    swapRDC(toAddress: string, amount: (number | string | Amount), options?: TransactionOptions): Promise<TxnOrHash>

    unsubscribe(topic: string, identifier: string, options?: TransactionOptions): Promise<TxnOrHash>

    static verifyAddress(addr: string): boolean

    verifyPassword(password: string, options?: {
      async: boolean
    }): boolean | Promise<boolean>
  }

  export class Amount extends Decimal {
  }

  export class Key {
    seed: string
    publicKey: string
    privateKey: Uint8Array
    curvePrivateKey: Uint8Array
    useWorker: boolean
    worker: Worker | null
    workerMsgID: number

    constructor(seed: string, options?: {
      worker?: boolean | (() => Worker | Promise<Worker>)
    })

    computeSharedKey(otherPubkey: string): Promise<string>

    getOrComputeSharedKey(otherPubkey: string): Promise<string>

    encrypt(message: string, destPubkey: string, options?: {
      nonce?: Uint8Array
    }): Promise<{
      message: Uint8Array
      nonce: Uint8Array
    }>

    decrypt(message: Uint8Array, nonce: Uint8Array, srcPubkey: string, options?: {}): Promise<string>

    sign(message: string): string
  }

  export type ConnectHandler = (params: {addr: string}) => void

  export type CreateTransactionOptions = {
    fee: number | string | Amount | null | void
    attrs: string | null | undefined
    buildOnly: boolean | null | undefined
  }

  export type Destination = string | Array<string>

  type DialOptions = {
    dialTimeout?: number
    sessionConfig?: SessionConfig
  }

  export type Message = {
    src: string
    payload: MessageData
    payloadType: PayloadType
    isEncrypted: boolean
    messageId: Uint8Array
    noReply: boolean
  }

  export type MessageData = Uint8Array | string

  export type MessageHandler = (message: Message) => ReplyData | false | void | Promise<ReplyData | false | void>

  export type PublishOptions = {
    encrypt?: boolean
    msgHoldingSeconds?: number
    messageId?: Uint8Array
    replyToId?: Uint8Array
    txPool?: boolean
    offset?: number
    limit?: number
  }

  export type ReplyData = MessageData | null

  export type SendOptions = {
    responseTimeout?: number
    encrypt?: boolean
    msgHoldingSeconds?: number
    noReply?: boolean
    messageId?: Uint8Array
    replyToId?: Uint8Array
  }

  export type SessionHandler = (session: Session) => void

  export type TransactionOptions = CreateTransactionOptions & {
    nonce?: number
  }

  export type TxnOrHash = string | Transaction

  // eslint-disable-next-line import/no-anonymous-default-export
  interface ClientOptions {
    identifier?: string
    reconnectIntervalMin?: number
    reconnectIntervalMax?: number
    responseTimeout?: number
    msgHoldingSeconds?: number
    encrypt?: boolean
    rpcServerAddr?: string
    tls?: boolean
    worker?: boolean | (() => Worker | Promise<Worker>)
  }

  interface MultiClientOptions extends ClientOptions {
    seed?: string
    numSubClients?: number
    originalClient?: boolean
    msgCacheExpiration?: number
    sessionConfig?: SessionConfig
  }

  enum PayloadType {
    BINARY = 0,
    TEXT = 1,
    ACK = 2,
    SESSION = 3,
  }

  type Session = Object // TODO: import from NCP types

  type SessionConfig = Object // TODO: import from NCP types

  type Transaction = Object // TODO

  export type ScryptParams = {
    salt: string,
    N: number,
    r: number,
    p: number,
  };

  type WalletJson = {
    Version: number
    MasterKey: string
    IV: string
    SeedEncrypted: string
    Address: string
    Scrypt?: ScryptParams
  }

  export namespace aes {
    export function encrypt(plaintext: string, password: string, iv: string): string

    export function decrypt(ciphertext: string, password: string, iv: string): string
  }

  export namespace crypto {
    export const keyLength: number
    export const nonceLength: number
    export const publicKeyLength: number
    export const seedLength: number
    export const signatureLength: number

    export function keyPair(seed: string): KeyPair

    export function ed25519SkToCurve25519(sk: Uint8Array): Uint8Array

    export function ed25519PkToCurve25519(pk: string): Promise<Uint8Array>

    export function computeSharedKey(myCurvePrivateKey: Uint8Array, otherPubkey: string): Promise<string>

    export function encryptSymmetric(message: Uint8Array, nonce: Uint8Array, key: Uint8Array): Promise<Uint8Array>

    export function decryptSymmetric(message: Uint8Array, nonce: Uint8Array, key: Uint8Array): Promise<Uint8Array | null>

    export function sign(privateKey: Uint8Array, message: string): Promise<string>

    type KeyPair = {
      seed: string
      publicKey: string
      privateKey: Uint8Array
      curvePrivateKey: Uint8Array
    }
  }

  export namespace errors {
    const rpcRespErrCodes: Object
    const AddrNotAllowedError: ErrorConstructor
    const ClientNotReadyError: ErrorConstructor
    const DataSizeTooLargeError: ErrorConstructor
    const DecryptionError: ErrorConstructor
    const UnknownError: ErrorConstructor
    const NotEnoughBalanceError: ErrorConstructor
    const WrongPasswordError: ErrorConstructor
    const InvalidAddressError: ErrorConstructor
    const InvalidWalletFormatError: ErrorConstructor
    const InvalidWalletVersionError: ErrorConstructor
    const InvalidArgumentError: ErrorConstructor
    const InvalidResponseError: ErrorConstructor
    const ServerError: ErrorConstructor
    const InvalidDestinationError: ErrorConstructor
    const RpcTimeoutError: ErrorConstructor
    const RpcError: ErrorConstructor
  }

  export namespace hash {
    export function cryptoHexStringParse(hexString: string): string

    export function sha256(str: string): string

    export function sha256Hex(hexStr: string): string

    export function doubleSha256(str: string): string

    export function doubleSha256Hex(hexStr: string): string

    export function ripemd160(str: string): string

    export function ripemd160Hex(hexStr: string): string
  }

  export namespace serialize {
    export const maxUintBits: number
    export const maxUint: number

    export function encodeUint8(value: number): string

    export function encodeUint16(value: number): string

    export function encodeUint32(value: number): string

    export function encodeUint64(value: number): string

    export function encodeUint(value: number): string

    export function encodeBytes(value: number): string

    export function encodeString(value: number): string

    export function encodeBool(value: number): string
  }

  export namespace util {
    import TypedArray = NodeJS.TypedArray

    export function hexToBytes(hex: string): Uint8Array

    export function bytesToHex(bytes: Uint8Array): string

    export function randomBytes(n: number): Uint8Array

    export function setPRNG(fn: (x: Uint8Array, n: number) => void): void

    export function randomBytesHex(len: number): string

    export function randomInt32(): number

    export function randomUint64(): number

    export function mergeTypedArrays(a: TypedArray, b: TypedArray): TypedArray

    export function assignDefined(target: Object, ...sources: Object[]): void

    export function utf8ToBytes(s: string): Uint8Array

    export function toLowerKeys(obj: Object): Object
  }

  export function setPRNG(fn: (x: Uint8Array, n: number) => void): void
}

declare interface nkn {
  MultiClient: nkn.MultiClient
  Client: nkn.Client
  Wallet: nkn.Wallet
  Amount: nkn.Amount
  ConnectHandler: nkn.ConnectHandler
  CreateTransactionOptions: nkn.CreateTransactionOptions
  Destination: nkn.Destination
  DialOptions: nkn.DialOptions
  Message: nkn.Message
  MessageData: nkn.MessageData
  MessageHandler: nkn.MessageHandler
  PublishOptions: nkn.PublishOptions
  ReplyData: nkn.ReplyData
  SendOptions: nkn.SendOptions
  SessionHandler: nkn.SessionHandler
  TransactionOptions: nkn.TransactionOptions
  TxnOrHash: nkn.TxnOrHash
}