import { NativeModules, Platform } from 'react-native';

const LINKING_ERROR =
  `The package '@jeremybarbet/react-native-purchase-kit' doesn't seem to be linked. Make sure: \n\n` +
  Platform.select({ ios: "- You have run 'pod install'\n", default: '' }) +
  '- You rebuilt the app after installing the package\n' +
  '- You are not using Expo Go\n';

if (!NativeModules.PurchaseKit) {
  throw new Error(LINKING_ERROR);
}

export enum ErrorCode {
  INPUT_VALIDATION = 'INPUT_VALIDATION',
  PENDING = 'PENDING',
  FAILED = 'FAILED',
  UNVERIFIED = 'UNVERIFIED',
  CANCELLED = 'CANCELLED',
  EMPTY = 'EMPTY',
  NOT_FOUND = 'NOT_FOUND',
  UNKNOWN = 'UNKNOWN',
}

export type ProductType = 'subscription' | 'consumable';

export interface ProductsInput {
  ids: string[];
  type: ProductType;
}

interface Price {
  value: number;
  currency: string | null;
  localized: string | null;
}

interface Period {
  value: string;
  unit: string;
  localized: string;
}

interface Subscription {
  period: Period | null;
}

export interface Product {
  id: string;
  name: string;
  price: Price;
  subscription: Subscription | null;
}

export interface PurchaseInput {
  id: string;
  userId: string;
  type: ProductType;
}

export interface Transaction {
  id: string;
  originalId: string;
  productId: string;
  environment: 'production' | 'sandbox' | 'xcode' | 'android';
  expirationDate: number;
  purchaseDate: number;
  originalPurchaseDate: number;
  token?: string;
  quantity: number;
  price: Price;
}

export interface FinishTransactionInput {
  id: string;
  type: ProductType;
}

export interface PurchaseKitError extends Error {
  code: ErrorCode;
}

interface NativePurchaseKit {
  products(input: ProductsInput): Promise<Product[]>;
  entitlements(): Promise<Transaction[]>;
  purchase(input: PurchaseInput): Promise<Transaction>;
  finishTransaction(input: FinishTransactionInput): Promise<void>;
  syncPurchases(): Promise<boolean>;
}

declare module 'react-native' {
  interface NativeModulesStatic {
    PurchaseKit: NativePurchaseKit;
  }
}

const { products, entitlements, purchase, finishTransaction, syncPurchases } = NativeModules.PurchaseKit;

export const purchaseKit = {
  products,
  entitlements,
  purchase,
  finishTransaction,
  syncPurchases,
};