/**
 * 通用支付模块类型定义 (Universal Payment Module Types)
 * 基于 Universal_Payment_Module v4.0 设计
 * 
 * 作者: 卡若
 * 版本: v4.0
 */

// 支付平台枚举
export type PaymentPlatform = 'alipay' | 'wechat' | 'paypal' | 'stripe' | 'usdt' | 'coin';

// 支付网关类型
export type PaymentGateway = 
  | 'alipay_web' | 'alipay_wap' | 'alipay_qr'
  | 'wechat_native' | 'wechat_jsapi' | 'wechat_h5' | 'wechat_app'
  | 'paypal' | 'stripe' | 'usdt' | 'coin';

// 订单状态
export type OrderStatus = 'created' | 'paying' | 'paid' | 'closed' | 'refunded';

// 交易状态
export type TradeStatus = 'paying' | 'paid' | 'closed' | 'refunded';

// 交易类型
export type TradeType = 'purchase' | 'recharge';

// 支付结果类型
export type PaymentResultType = 'url' | 'qrcode' | 'json' | 'address' | 'direct';

// 货币类型
export type Currency = 'CNY' | 'USD' | 'EUR' | 'USDT';

/**
 * 创建订单请求参数
 */
export interface CreateOrderParams {
  userId: string;
  title: string;
  amount: number; // 金额（元）
  currency?: Currency;
  productId?: string;
  productType?: 'section' | 'fullbook' | 'membership' | 'vip';
  extraParams?: Record<string, unknown>;
}

/**
 * 订单信息
 */
export interface Order {
  sn: string; // 订单号
  userId: string;
  title: string;
  priceAmount: number; // 原价（分）
  payAmount: number; // 应付金额（分）
  currency: Currency;
  status: OrderStatus;
  productId?: string;
  productType?: string;
  extraData?: Record<string, unknown>;
  paidAt?: Date;
  closedAt?: Date;
  expiredAt?: Date;
  createdAt: Date;
  updatedAt: Date;
}

/**
 * 发起支付请求参数
 */
export interface CheckoutParams {
  orderSn: string;
  gateway: PaymentGateway;
  returnUrl?: string;
  openid?: string; // 微信JSAPI需要
  coinAmount?: number; // 虚拟币抵扣
}

/**
 * 创建交易请求数据
 */
export interface CreateTradeData {
  goodsTitle: string;
  goodsDetail?: string;
  tradeSn: string;
  orderSn: string;
  amount: number; // 金额（分）
  notifyUrl: string;
  returnUrl?: string;
  platformType?: string; // web/wap/jsapi/native/h5/app
  createIp?: string;
  openId?: string;
  attach?: Record<string, unknown>;
}

/**
 * 支付交易结果
 */
export interface TradeResult {
  type: PaymentResultType;
  payload: string | Record<string, string>;
  tradeSn: string;
  expiration?: number; // 过期时间（秒）
  amount?: number;
  coinDeducted?: number;
  prepayId?: string; // 微信预支付ID
}

/**
 * 回调解析结果
 */
export interface NotifyResult {
  status: 'paying' | 'paid' | 'closed' | 'refunded' | 'failed';
  tradeSn: string;
  platformSn: string;
  payAmount: number; // 分
  payTime: Date;
  currency: Currency;
  attach?: Record<string, unknown>;
  rawData?: Record<string, unknown>;
}

/**
 * 交易流水
 */
export interface PayTrade {
  id?: string;
  tradeSn: string;
  orderSn: string;
  userId: string;
  title: string;
  amount: number; // 分
  cashAmount: number; // 现金支付金额（分）
  coinAmount: number; // 虚拟币抵扣金额
  currency: Currency;
  platform: PaymentPlatform;
  platformType?: string;
  platformSn?: string;
  platformCreatedParams?: Record<string, unknown>;
  platformCreatedResult?: Record<string, unknown>;
  status: TradeStatus;
  type: TradeType;
  payTime?: Date;
  notifyData?: Record<string, unknown>;
  sellerId?: string;
  createdAt: Date;
  updatedAt: Date;
}

/**
 * 退款记录
 */
export interface Refund {
  id?: string;
  refundSn: string;
  tradeSn: string;
  orderSn: string;
  amount: number; // 分
  reason?: string;
  status: 'pending' | 'processing' | 'success' | 'failed';
  platformRefundSn?: string;
  refundedAt?: Date;
  operatorId?: string;
  createdAt: Date;
  updatedAt: Date;
}

/**
 * 支付网关配置
 */
export interface GatewayConfig {
  enabled: boolean;
  mode: 'sandbox' | 'production';
  [key: string]: unknown;
}

/**
 * 支付宝配置
 */
export interface AlipayConfig extends GatewayConfig {
  appId: string;
  pid: string;
  sellerEmail?: string;
  privateKey?: string;
  publicKey?: string;
  md5Key?: string;
}

/**
 * 微信支付配置
 */
export interface WechatConfig extends GatewayConfig {
  appId: string;
  appSecret?: string;
  serviceAppId?: string; // 服务号AppID
  serviceSecret?: string;
  mchId: string;
  mchKey: string;
  certPath?: string;
  keyPath?: string;
}

/**
 * 统一响应格式
 */
export interface PaymentResponse<T = unknown> {
  code: number;
  message: string;
  data: T | null;
}

/**
 * 支付方式信息
 */
export interface PaymentMethod {
  gateway: PaymentGateway;
  name: string;
  icon: string;
  enabled: boolean;
  available: boolean; // 当前环境是否可用
}

/**
 * 支付异常
 */
export class PaymentException extends Error {
  constructor(message: string, public code?: string) {
    super(message);
    this.name = 'PaymentException';
  }
}

export class SignatureError extends PaymentException {
  constructor(message = '签名验证失败') {
    super(message, 'SIGNATURE_ERROR');
    this.name = 'SignatureError';
  }
}

export class AmountMismatchError extends PaymentException {
  constructor(message = '金额不匹配') {
    super(message, 'AMOUNT_MISMATCH');
    this.name = 'AmountMismatchError';
  }
}

export class GatewayNotFoundError extends PaymentException {
  constructor(gateway: string) {
    super(`不支持的支付网关: ${gateway}`, 'GATEWAY_NOT_FOUND');
    this.name = 'GatewayNotFoundError';
  }
}

/**
 * 工具函数：元转分
 */
export function yuanToFen(yuan: number): number {
  return Math.round(yuan * 100);
}

/**
 * 工具函数：分转元
 */
export function fenToYuan(fen: number): number {
  return Math.round(fen) / 100;
}

/**
 * 生成订单号
 * 格式: YYYYMMDD + 6位随机数
 */
export function generateOrderSn(prefix = ''): string {
  const date = new Date();
  const dateStr = date.toISOString().slice(0, 10).replace(/-/g, '');
  const random = Math.floor(Math.random() * 1000000).toString().padStart(6, '0');
  return `${prefix}${dateStr}${random}`;
}

/**
 * 生成交易流水号
 * 格式: T + YYYYMMDDHHMMSS + 5位随机数
 */
export function generateTradeSn(prefix = 'T'): string {
  const now = new Date();
  const timestamp = now.toISOString()
    .replace(/[-:T]/g, '')
    .slice(0, 14);
  const random = Math.floor(Math.random() * 100000).toString().padStart(5, '0');
  return `${prefix}${timestamp}${random}`;
}