/*
 This file is part of TALER
 (C) 2015-2017 GNUnet e.V. and INRIA

 TALER is free software; you can redistribute it and/or modify it under the
 terms of the GNU General Public License as published by the Free Software
 Foundation; either version 3, or (at your option) any later version.

 TALER is distributed in the hope that it will be useful, but WITHOUT ANY
 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

 You should have received a copy of the GNU General Public License along with
 TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 */

/**
 * Types used by clients of the wallet.
 *
 * These types are defined in a separate file make tree shaking easier, since
 * some components use these types (via RPC) but do not depend on the wallet
 * code directly.
 */

/**
 * Imports.
 */
import { Checkable } from "./util/checkable";
import * as LibtoolVersion from "./util/libtoolVersion";

import { AmountJson } from "./util/amounts";

import {
  CoinRecord,
  DenominationRecord,
  ExchangeRecord,
  ExchangeWireInfo,
  WithdrawalSource,
  RetryInfo,
} from "./dbTypes";
import { CoinPaySig, ContractTerms, PayReq } from "./talerTypes";

/**
 * Response for the create reserve request to the wallet.
 */
@Checkable.Class()
export class CreateReserveResponse {
  /**
   * Exchange URL where the bank should create the reserve.
   * The URL is canonicalized in the response.
   */
  @Checkable.String()
  exchange: string;

  /**
   * Reserve public key of the newly created reserve.
   */
  @Checkable.String()
  reservePub: string;

  /**
   * Verify that a value matches the schema of this class and convert it into a
   * member.
   */
  static checked: (obj: any) => CreateReserveResponse;
}

/**
 * Information about what will happen when creating a reserve.
 *
 * Sent to the wallet frontend to be rendered and shown to the user.
 */
export interface ReserveCreationInfo {
  /**
   * Exchange that the reserve will be created at.
   */
  exchangeInfo: ExchangeRecord;

  /**
   * Filtered wire info to send to the bank.
   */
  exchangeWireAccounts: string[];

  /**
   * Selected denominations for withdraw.
   */
  selectedDenoms: DenominationRecord[];

  /**
   * Fees for withdraw.
   */
  withdrawFee: AmountJson;

  /**
   * Remaining balance that is too small to be withdrawn.
   */
  overhead: AmountJson;

  /**
   * Wire fees from the exchange.
   */
  wireFees: ExchangeWireInfo;

  /**
   * Does the wallet know about an auditor for
   * the exchange that the reserve.
   */
  isAudited: boolean;

  /**
   * The exchange is trusted directly.
   */
  isTrusted: boolean;

  /**
   * The earliest deposit expiration of the selected coins.
   */
  earliestDepositExpiration: Timestamp;

  /**
   * Number of currently offered denominations.
   */
  numOfferedDenoms: number;

  /**
   * Public keys of trusted auditors for the currency we're withdrawing.
   */
  trustedAuditorPubs: string[];

  /**
   * Result of checking the wallet's version
   * against the exchange's version.
   *
   * Older exchanges don't return version information.
   */
  versionMatch: LibtoolVersion.VersionMatchResult | undefined;

  /**
   * Libtool-style version string for the exchange or "unknown"
   * for older exchanges.
   */
  exchangeVersion: string;

  /**
   * Libtool-style version string for the wallet.
   */
  walletVersion: string;
}

export interface WithdrawDetails {
  withdrawInfo: DownloadedWithdrawInfo;
  reserveCreationInfo: ReserveCreationInfo | undefined;
}

/**
 * Mapping from currency/exchange to detailed balance
 * information.
 */
export interface WalletBalance {
  /**
   * Mapping from currency name to detailed balance info.
   */
  byExchange: { [exchangeBaseUrl: string]: WalletBalanceEntry };

  /**
   * Mapping from currency name to detailed balance info.
   */
  byCurrency: { [currency: string]: WalletBalanceEntry };
}

/**
 * Detailed wallet balance for a particular currency.
 */
export interface WalletBalanceEntry {
  /**
   * Directly available amount.
   */
  available: AmountJson;
  /**
   * Amount that we're waiting for (refresh, withdrawal).
   */
  pendingIncoming: AmountJson;
  /**
   * Amount that's marked for a pending payment.
   */
  pendingPayment: AmountJson;
  /**
   * Amount that was paid back and we could withdraw again.
   */
  paybackAmount: AmountJson;

  pendingIncomingWithdraw: AmountJson;
  pendingIncomingRefresh: AmountJson;
  pendingIncomingDirty: AmountJson;
}

/**
 * Coins used for a payment, with signatures authorizing the payment and the
 * coins with remaining value updated to accomodate for a payment.
 */
export interface PayCoinInfo {
  originalCoins: CoinRecord[];
  updatedCoins: CoinRecord[];
  sigs: CoinPaySig[];
}

/**
 * For terseness.
 */
export function mkAmount(
  value: number,
  fraction: number,
  currency: string,
): AmountJson {
  return { value, fraction, currency };
}

/**
 * Result for confirmPay
 */
export interface ConfirmPayResult {
  nextUrl: string;
}

/**
 * Activity history record.
 */
export interface HistoryEvent {
  /**
   * Type of the history event.
   */
  type: string;

  /**
   * Time when the activity was recorded.
   */
  timestamp: Timestamp;

  /**
   * Details used when rendering the history record.
   */
  detail: any;

  /**
   * Set to 'true' if the event has been explicitly created,
   * and set to 'false' if the event has been derived from the
   * state of the database.
   */
  explicit: boolean;
}

/**
 * Information about all sender wire details known to the wallet,
 * as well as exchanges that accept these wire types.
 */
export interface SenderWireInfos {
  /**
   * Mapping from exchange base url to list of accepted
   * wire types.
   */
  exchangeWireTypes: { [exchangeBaseUrl: string]: string[] };

  /**
   * Sender wire information stored in the wallet.
   */
  senderWires: string[];
}

/**
 * Request to mark a reserve as confirmed.
 */
@Checkable.Class()
export class CreateReserveRequest {
  /**
   * The initial amount for the reserve.
   */
  @Checkable.Value(() => AmountJson)
  amount: AmountJson;

  /**
   * Exchange URL where the bank should create the reserve.
   */
  @Checkable.String()
  exchange: string;

  /**
   * Payto URI that identifies the exchange's account that the funds
   * for this reserve go into.
   */
  @Checkable.String()
  exchangeWire: string;

  /**
   * Wire details (as a payto URI) for the bank account that sent the funds to
   * the exchange.
   */
  @Checkable.Optional(Checkable.String())
  senderWire?: string;

  /**
   * URL to fetch the withdraw status from the bank.
   */
  @Checkable.Optional(Checkable.String())
  bankWithdrawStatusUrl?: string;

  /**
   * Verify that a value matches the schema of this class and convert it into a
   * member.
   */
  static checked: (obj: any) => CreateReserveRequest;
}

/**
 * Request to mark a reserve as confirmed.
 */
@Checkable.Class()
export class ConfirmReserveRequest {
  /**
   * Public key of then reserve that should be marked
   * as confirmed.
   */
  @Checkable.String()
  reservePub: string;

  /**
   * Verify that a value matches the schema of this class and convert it into a
   * member.
   */
  static checked: (obj: any) => ConfirmReserveRequest;
}

/**
 * Wire coins to the user's own bank account.
 */
@Checkable.Class()
export class ReturnCoinsRequest {
  /**
   * The amount to wire.
   */
  @Checkable.Value(() => AmountJson)
  amount: AmountJson;

  /**
   * The exchange to take the coins from.
   */
  @Checkable.String()
  exchange: string;

  /**
   * Wire details for the bank account of the customer that will
   * receive the funds.
   */
  @Checkable.Any()
  senderWire?: object;

  /**
   * Verify that a value matches the schema of this class and convert it into a
   * member.
   */
  static checked: (obj: any) => ReturnCoinsRequest;
}

/**
 * Result of selecting coins, contains the exchange, and selected
 * coins with their denomination.
 */
export interface CoinSelectionResult {
  exchangeUrl: string;
  cds: CoinWithDenom[];
  totalFees: AmountJson;
  /**
   * Total amount, including wire fees payed by the customer.
   */
  totalAmount: AmountJson;
}

/**
 * Named tuple of coin and denomination.
 */
export interface CoinWithDenom {
  /**
   * A coin.  Must have the same denomination public key as the associated
   * denomination.
   */
  coin: CoinRecord;
  /**
   * An associated denomination.
   */
  denom: DenominationRecord;
}

/**
 * Status of processing a tip.
 */
export interface TipStatus {
  accepted: boolean;
  amount: AmountJson;
  amountLeft: AmountJson;
  nextUrl: string;
  exchangeUrl: string;
  tipId: string;
  merchantTipId: string;
  merchantOrigin: string;
  expirationTimestamp: number;
  timestamp: number;
  totalFees: AmountJson;
}

export interface BenchmarkResult {
  time: { [s: string]: number };
  repetitions: number;
}

/**
 * Cached next URL for a particular session id.
 */
export interface NextUrlResult {
  nextUrl: string;
  lastSessionId: string | undefined;
}

export type PreparePayResult =
  | PreparePayResultError
  | PreparePayResultInsufficientBalance
  | PreparePayResultPaid
  | PreparePayResultPaymentPossible;

export interface PreparePayResultPaymentPossible {
  status: "payment-possible";
  proposalId: string;
  contractTerms: ContractTerms;
  totalFees: AmountJson;
}

export interface PreparePayResultInsufficientBalance {
  status: "insufficient-balance";
  proposalId: string;
  contractTerms: ContractTerms;
}

export interface PreparePayResultError {
  status: "error";
  error: string;
}

export interface PreparePayResultPaid {
  status: "paid";
  contractTerms: ContractTerms;
  nextUrl: string;
}

export interface DownloadedWithdrawInfo {
  selectionDone: boolean;
  transferDone: boolean;
  amount: AmountJson;
  senderWire?: string;
  suggestedExchange?: string;
  confirmTransferUrl?: string;
  wireTypes: string[];
  extractedStatusUrl: string;
}

export interface AcceptWithdrawalResponse {
  reservePub: string;
  confirmTransferUrl?: string;
}

/**
 * Details about a purchase, including refund status.
 */
export interface PurchaseDetails {
  contractTerms: ContractTerms;
  hasRefund: boolean;
  totalRefundAmount: AmountJson;
  totalRefundAndRefreshFees: AmountJson;
}

export interface WalletDiagnostics {
  walletManifestVersion: string;
  walletManifestDisplayVersion: string;
  errors: string[];
  firefoxIdbProblem: boolean;
  dbOutdated: boolean;
}

export interface PendingWithdrawOperation {
  type: "withdraw";
  source: WithdrawalSource;
  withdrawSessionId: string;
  numCoinsWithdrawn: number;
  numCoinsTotal: number;
}

export interface PendingRefreshOperation {
  type: "refresh";
}

export interface PendingPayOperation {
  type: "pay";
}

export const enum NotificationType {
  CoinWithdrawn = "coin-withdrawn",
  ProposalAccepted = "proposal-accepted",
  ProposalDownloaded = "proposal-downloaded",
  RefundsSubmitted = "refunds-submitted",
  PaybackStarted = "payback-started",
  PaybackFinished = "payback-finished",
  RefreshRevealed = "refresh-revealed",
  RefreshMelted = "refresh-melted",
  RefreshStarted = "refresh-started",
  RefreshRefused = "refresh-refused",
  ReserveUpdated = "reserve-updated",
  ReserveConfirmed = "reserve-confirmed",
  ReserveDepleted = "reserve-depleted",
  ReserveCreated = "reserve-created",
  WithdrawSessionCreated = "withdraw-session-created",
  WithdrawSessionFinished = "withdraw-session-finished",
  WaitingForRetry = "waiting-for-retry",
  RefundStarted = "refund-started",
  RefundQueried = "refund-queried",
  RefundFinished = "refund-finished",
  ExchangeOperationError = "exchange-operation-error",
  RefreshOperationError = "refresh-operation-error",
  RefundApplyOperationError = "refund-apply-error",
  RefundStatusOperationError = "refund-status-error",
  ProposalOperationError = "proposal-error",
  TipOperationError = "tip-error",
  PayOperationError = "pay-error",
  WithdrawOperationError = "withdraw-error",
  ReserveOperationError = "reserve-error",
  Wildcard = "wildcard",
}

export interface ProposalAcceptedNotification {
  type: NotificationType.ProposalAccepted;
  proposalId: string;
}

export interface CoinWithdrawnNotification {
  type: NotificationType.CoinWithdrawn;
}

export interface RefundStartedNotification {
  type: NotificationType.RefundStarted;
}

export interface RefundQueriedNotification {
  type: NotificationType.RefundQueried;
}

export interface ProposalDownloadedNotification {
  type: NotificationType.ProposalDownloaded;
  proposalId: string;
}

export interface RefundsSubmittedNotification {
  type: NotificationType.RefundsSubmitted;
  proposalId: string;
}

export interface PaybackStartedNotification {
  type: NotificationType.PaybackStarted;
}

export interface PaybackFinishedNotification {
  type: NotificationType.PaybackFinished;
}

export interface RefreshMeltedNotification {
  type: NotificationType.RefreshMelted;
}

export interface RefreshRevealedNotification {
  type: NotificationType.RefreshRevealed;
}

export interface RefreshStartedNotification {
  type: NotificationType.RefreshStarted;
}

export interface RefreshRefusedNotification {
  type: NotificationType.RefreshRefused;
}

export interface ReserveUpdatedNotification {
  type: NotificationType.ReserveUpdated;
}

export interface ReserveConfirmedNotification {
  type: NotificationType.ReserveConfirmed;
}

export interface WithdrawSessionCreatedNotification {
  type: NotificationType.WithdrawSessionCreated;
  withdrawSessionId: string;
}

export interface WithdrawSessionFinishedNotification {
  type: NotificationType.WithdrawSessionFinished;
  withdrawSessionId: string;
}

export interface ReserveDepletedNotification {
  type: NotificationType.ReserveDepleted;
  reservePub: string;
}

export interface WaitingForRetryNotification {
  type: NotificationType.WaitingForRetry;
  numPending: number;
  numGivingLiveness: number;
}

export interface RefundFinishedNotification {
  type: NotificationType.RefundFinished;
}

export interface ExchangeOperationErrorNotification {
  type: NotificationType.ExchangeOperationError;
}

export interface RefreshOperationErrorNotification {
  type: NotificationType.RefreshOperationError;
}

export interface RefundStatusOperationErrorNotification {
  type: NotificationType.RefundStatusOperationError;
}

export interface RefundApplyOperationErrorNotification {
  type: NotificationType.RefundApplyOperationError;
}

export interface PayOperationErrorNotification {
  type: NotificationType.PayOperationError;
}

export interface ProposalOperationErrorNotification {
  type: NotificationType.ProposalOperationError;
}

export interface TipOperationErrorNotification {
  type: NotificationType.TipOperationError;
}

export interface WithdrawOperationErrorNotification {
  type: NotificationType.WithdrawOperationError;
}

export interface ReserveOperationErrorNotification {
  type: NotificationType.ReserveOperationError;
}

export interface ReserveCreatedNotification {
  type: NotificationType.ReserveCreated;
}

export interface WildcardNotification {
  type: NotificationType.Wildcard;
}

export type WalletNotification =
  | WithdrawOperationErrorNotification
  | ReserveOperationErrorNotification
  | ExchangeOperationErrorNotification
  | RefreshOperationErrorNotification
  | RefundStatusOperationErrorNotification
  | RefundApplyOperationErrorNotification
  | ProposalOperationErrorNotification
  | PayOperationErrorNotification
  | TipOperationErrorNotification
  | ProposalAcceptedNotification
  | ProposalDownloadedNotification
  | RefundsSubmittedNotification
  | PaybackStartedNotification
  | PaybackFinishedNotification
  | RefreshMeltedNotification
  | RefreshRevealedNotification
  | RefreshStartedNotification
  | RefreshRefusedNotification
  | ReserveUpdatedNotification
  | ReserveCreatedNotification
  | ReserveConfirmedNotification
  | WithdrawSessionFinishedNotification
  | ReserveDepletedNotification
  | WaitingForRetryNotification
  | RefundStartedNotification
  | RefundFinishedNotification
  | RefundQueriedNotification
  | WithdrawSessionCreatedNotification
  | CoinWithdrawnNotification
  | WildcardNotification;

export interface OperationError {
  type: string;
  message: string;
  details: any;
}

export interface PendingExchangeUpdateOperation {
  type: "exchange-update";
  stage: string;
  reason: string;
  exchangeBaseUrl: string;
  lastError: OperationError | undefined;
}

export interface PendingBugOperation {
  type: "bug";
  message: string;
  details: any;
}

export interface PendingReserveOperation {
  type: "reserve";
  retryInfo: RetryInfo | undefined;
  stage: string;
  timestampCreated: Timestamp;
  reserveType: string;
  reservePub: string;
  bankWithdrawConfirmUrl?: string;
}

export interface PendingRefreshOperation {
  type: "refresh";
  lastError?: OperationError;
  refreshSessionId: string;
  oldCoinPub: string;
  refreshStatus: string;
  refreshOutputSize: number;
}

export interface PendingDirtyCoinOperation {
  type: "dirty-coin";
  coinPub: string;
}

export interface PendingProposalDownloadOperation {
  type: "proposal-download";
  merchantBaseUrl: string;
  proposalTimestamp: Timestamp;
  proposalId: string;
  orderId: string;
  lastError?: OperationError;
  retryInfo: RetryInfo;
}

/**
 * User must choose whether to accept or reject the merchant's
 * proposed contract terms.
 */
export interface PendingProposalChoiceOperation {
  type: "proposal-choice";
  merchantBaseUrl: string;
  proposalTimestamp: Timestamp;
  proposalId: string;
}

export interface PendingTipOperation {
  type: "tip";
  tipId: string;
  merchantBaseUrl: string;
  merchantTipId: string;
}

export interface PendingPayOperation {
  type: "pay";
  proposalId: string;
  isReplay: boolean;
  retryInfo: RetryInfo,
  lastError: OperationError | undefined;
}

export interface PendingRefundQueryOperation {
  type: "refund-query";
  proposalId: string;
  retryInfo: RetryInfo,
  lastError: OperationError | undefined;
}

export interface PendingRefundApplyOperation {
  type: "refund-apply";
  proposalId: string;
  retryInfo: RetryInfo,
  lastError: OperationError | undefined;
  numRefundsPending: number;
  numRefundsDone: number;
}

export interface PendingOperationInfoCommon {
  type: string;
  givesLifeness: boolean;
}

export type PendingOperationInfo = PendingOperationInfoCommon &
  (
    | PendingWithdrawOperation
    | PendingReserveOperation
    | PendingBugOperation
    | PendingDirtyCoinOperation
    | PendingExchangeUpdateOperation
    | PendingRefreshOperation
    | PendingTipOperation
    | PendingProposalDownloadOperation
    | PendingProposalChoiceOperation
    | PendingPayOperation
    | PendingRefundQueryOperation
    | PendingRefundApplyOperation
  );

export interface PendingOperationsResponse {
  pendingOperations: PendingOperationInfo[];
  nextRetryDelay: Duration;
}

export interface HistoryQuery {
  /**
   * Verbosity of history events.
   * Level 0: Only withdraw, pay, tip and refund events.
   * Level 1: All events.
   */
  level: number;
}

@Checkable.Class()
export class Timestamp {
  /**
   * Timestamp in milliseconds.
   */
  @Checkable.Number()
  t_ms: number;

  static checked: (obj: any) => Timestamp;
}

export interface Duration {
  /**
   * Duration in milliseconds.
   */
  d_ms: number;
}

export function getTimestampNow(): Timestamp {
  return {
    t_ms: new Date().getTime(),
  };
}

export interface PlanchetCreationResult {
  coinPub: string;
  coinPriv: string;
  reservePub: string;
  denomPubHash: string;
  denomPub: string;
  blindingKey: string;
  withdrawSig: string;
  coinEv: string;
  coinValue: AmountJson;
}

export interface PlanchetCreationRequest {
  value: AmountJson;
  feeWithdraw: AmountJson;
  denomPub: string;
  reservePub: string;
  reservePriv: string;
}