/**
 * 分销服务
 * 核心功能：绑定追踪、过期检测、佣金计算、自动提现
 */

import type {
  DistributionBinding,
  Distributor,
  WithdrawRecord,
  ClickRecord,
  DistributionConfig,
  ExpireReminder,
  DistributionOverview,
} from './types';

// 默认分销配置
export const DEFAULT_DISTRIBUTION_CONFIG: DistributionConfig = {
  bindingDays: 30,              // 30天绑定期
  bindingPriority: 'first',     // 首次绑定优先
  defaultCommissionRate: 90,    // 默认90%佣金
  levelRates: {
    normal: 90,
    silver: 92,
    gold: 95,
    diamond: 98,
  },
  minWithdrawAmount: 10,        // 最低10元提现
  withdrawFeeRate: 0,           // 0手续费
  autoWithdrawEnabled: true,    // 允许自动提现
  autoWithdrawTime: '10:00',    // 每天10点自动提现
  expireRemindDays: 3,          // 过期前3天提醒
  enabled: true,
};

// 存储键名
const STORAGE_KEYS = {
  BINDINGS: 'distribution_bindings',
  DISTRIBUTORS: 'distribution_distributors',
  WITHDRAWALS: 'distribution_withdrawals',
  CLICKS: 'distribution_clicks',
  CONFIG: 'distribution_config',
  REMINDERS: 'distribution_reminders',
};

/**
 * 生成唯一ID
 */
function generateId(prefix: string = ''): string {
  return `${prefix}${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
}

/**
 * 获取配置
 */
export function getDistributionConfig(): DistributionConfig {
  if (typeof window === 'undefined') return DEFAULT_DISTRIBUTION_CONFIG;
  const stored = localStorage.getItem(STORAGE_KEYS.CONFIG);
  return stored ? { ...DEFAULT_DISTRIBUTION_CONFIG, ...JSON.parse(stored) } : DEFAULT_DISTRIBUTION_CONFIG;
}

/**
 * 更新配置
 */
export function updateDistributionConfig(config: Partial<DistributionConfig>): DistributionConfig {
  if (typeof window === 'undefined') return DEFAULT_DISTRIBUTION_CONFIG;
  const current = getDistributionConfig();
  const updated = { ...current, ...config };
  localStorage.setItem(STORAGE_KEYS.CONFIG, JSON.stringify(updated));
  return updated;
}

// ============== 绑定管理 ==============

/**
 * 获取所有绑定
 */
export function getAllBindings(): DistributionBinding[] {
  if (typeof window === 'undefined') return [];
  return JSON.parse(localStorage.getItem(STORAGE_KEYS.BINDINGS) || '[]');
}

/**
 * 记录链接点击并创建绑定
 */
export function recordClickAndBinding(params: {
  referralCode: string;
  referrerId: string;
  visitorId: string;
  visitorPhone?: string;
  visitorNickname?: string;
  source: 'link' | 'miniprogram' | 'poster' | 'qrcode';
  sourceDetail?: string;
  deviceInfo?: DistributionBinding['deviceInfo'];
}): { click: ClickRecord; binding: DistributionBinding | null } {
  if (typeof window === 'undefined') {
    return { click: {} as ClickRecord, binding: null };
  }

  const config = getDistributionConfig();
  const now = new Date();
  
  // 1. 记录点击
  const click: ClickRecord = {
    id: generateId('click_'),
    referralCode: params.referralCode,
    referrerId: params.referrerId,
    visitorId: params.visitorId,
    isNewVisitor: !hasExistingBinding(params.visitorId),
    source: params.source,
    deviceInfo: params.deviceInfo,
    registered: false,
    purchased: false,
    clickTime: now.toISOString(),
    createdAt: now.toISOString(),
  };
  
  const clicks = JSON.parse(localStorage.getItem(STORAGE_KEYS.CLICKS) || '[]');
  clicks.push(click);
  localStorage.setItem(STORAGE_KEYS.CLICKS, JSON.stringify(clicks));
  
  // 2. 检查是否需要创建绑定
  let binding: DistributionBinding | null = null;
  
  // 检查现有绑定
  const existingBinding = getActiveBindingForVisitor(params.visitorId);
  
  if (!existingBinding || config.bindingPriority === 'last') {
    // 创建新绑定（如果没有现有绑定，或策略是"最后绑定"）
    const expireDate = new Date(now);
    expireDate.setDate(expireDate.getDate() + config.bindingDays);
    
    binding = {
      id: generateId('bind_'),
      referrerId: params.referrerId,
      referrerCode: params.referralCode,
      visitorId: params.visitorId,
      visitorPhone: params.visitorPhone,
      visitorNickname: params.visitorNickname,
      bindingTime: now.toISOString(),
      expireTime: expireDate.toISOString(),
      status: 'active',
      source: params.source,
      sourceDetail: params.sourceDetail,
      deviceInfo: params.deviceInfo,
      createdAt: now.toISOString(),
      updatedAt: now.toISOString(),
    };
    
    // 如果是"最后绑定"策略，先作废之前的绑定
    if (existingBinding && config.bindingPriority === 'last') {
      cancelBinding(existingBinding.id, '新绑定覆盖');
    }
    
    const bindings = getAllBindings();
    bindings.push(binding);
    localStorage.setItem(STORAGE_KEYS.BINDINGS, JSON.stringify(bindings));
    
    // 更新分销商统计
    updateDistributorStats(params.referrerId);
  }
  
  return { click, binding };
}

/**
 * 检查是否有现有绑定
 */
function hasExistingBinding(visitorId: string): boolean {
  const bindings = getAllBindings();
  return bindings.some(b => b.visitorId === visitorId);
}

/**
 * 获取访客的有效绑定
 */
export function getActiveBindingForVisitor(visitorId: string): DistributionBinding | null {
  const bindings = getAllBindings();
  const now = new Date();
  
  return bindings.find(b => 
    b.visitorId === visitorId && 
    b.status === 'active' &&
    new Date(b.expireTime) > now
  ) || null;
}

/**
 * 获取分销商的所有绑定
 */
export function getBindingsForDistributor(referrerId: string): DistributionBinding[] {
  const bindings = getAllBindings();
  return bindings.filter(b => b.referrerId === referrerId);
}

/**
 * 取消绑定
 */
export function cancelBinding(bindingId: string, reason?: string): boolean {
  const bindings = getAllBindings();
  const index = bindings.findIndex(b => b.id === bindingId);
  
  if (index === -1) return false;
  
  bindings[index] = {
    ...bindings[index],
    status: 'cancelled',
    updatedAt: new Date().toISOString(),
  };
  
  localStorage.setItem(STORAGE_KEYS.BINDINGS, JSON.stringify(bindings));
  return true;
}

/**
 * 将绑定标记为已转化（用户付款后调用）
 */
export function convertBinding(params: {
  visitorId: string;
  orderId: string;
  orderAmount: number;
}): { binding: DistributionBinding | null; commission: number } {
  const binding = getActiveBindingForVisitor(params.visitorId);
  
  if (!binding) {
    return { binding: null, commission: 0 };
  }
  
  const config = getDistributionConfig();
  const distributor = getDistributor(binding.referrerId);
  const commissionRate = distributor?.commissionRate || config.defaultCommissionRate;
  const commission = params.orderAmount * (commissionRate / 100);
  
  // 更新绑定状态
  const bindings = getAllBindings();
  const index = bindings.findIndex(b => b.id === binding.id);
  
  if (index !== -1) {
    bindings[index] = {
      ...bindings[index],
      status: 'converted',
      convertedAt: new Date().toISOString(),
      orderId: params.orderId,
      orderAmount: params.orderAmount,
      commission,
      updatedAt: new Date().toISOString(),
    };
    
    localStorage.setItem(STORAGE_KEYS.BINDINGS, JSON.stringify(bindings));
    
    // 更新分销商收益
    addDistributorEarnings(binding.referrerId, commission);
    
    // 更新点击记录
    updateClickPurchaseStatus(binding.referrerId, params.visitorId);
  }
  
  return { binding: bindings[index], commission };
}

/**
 * 检查并处理过期绑定
 */
export function processExpiredBindings(): {
  expired: DistributionBinding[];
  expiringSoon: DistributionBinding[];
} {
  const bindings = getAllBindings();
  const config = getDistributionConfig();
  const now = new Date();
  const remindThreshold = new Date();
  remindThreshold.setDate(remindThreshold.getDate() + config.expireRemindDays);
  
  const expired: DistributionBinding[] = [];
  const expiringSoon: DistributionBinding[] = [];
  
  const updatedBindings = bindings.map(binding => {
    if (binding.status !== 'active') return binding;
    
    const expireTime = new Date(binding.expireTime);
    
    if (expireTime <= now) {
      // 已过期
      expired.push(binding);
      createExpireReminder(binding, 'expired');
      return {
        ...binding,
        status: 'expired' as const,
        updatedAt: now.toISOString(),
      };
    } else if (expireTime <= remindThreshold) {
      // 即将过期
      const daysRemaining = Math.ceil((expireTime.getTime() - now.getTime()) / (1000 * 60 * 60 * 24));
      expiringSoon.push(binding);
      createExpireReminder(binding, 'expiring_soon', daysRemaining);
    }
    
    return binding;
  });
  
  localStorage.setItem(STORAGE_KEYS.BINDINGS, JSON.stringify(updatedBindings));
  
  // 更新相关分销商统计
  const affectedDistributors = new Set([
    ...expired.map(b => b.referrerId),
    ...expiringSoon.map(b => b.referrerId),
  ]);
  
  affectedDistributors.forEach(distributorId => {
    updateDistributorStats(distributorId);
  });
  
  return { expired, expiringSoon };
}

// ============== 提醒管理 ==============

/**
 * 创建过期提醒
 */
function createExpireReminder(
  binding: DistributionBinding,
  type: 'expiring_soon' | 'expired',
  daysRemaining?: number
): void {
  const reminders = JSON.parse(localStorage.getItem(STORAGE_KEYS.REMINDERS) || '[]') as ExpireReminder[];
  
  // 检查是否已存在相同提醒
  const exists = reminders.some(r => 
    r.bindingId === binding.id && 
    r.reminderType === type
  );
  
  if (exists) return;
  
  const reminder: ExpireReminder = {
    id: generateId('remind_'),
    bindingId: binding.id,
    distributorId: binding.referrerId,
    bindingInfo: {
      visitorNickname: binding.visitorNickname,
      visitorPhone: binding.visitorPhone,
      bindingTime: binding.bindingTime,
      expireTime: binding.expireTime,
    },
    reminderType: type,
    daysRemaining,
    isRead: false,
    createdAt: new Date().toISOString(),
  };
  
  reminders.push(reminder);
  localStorage.setItem(STORAGE_KEYS.REMINDERS, JSON.stringify(reminders));
}

/**
 * 获取分销商的提醒
 */
export function getRemindersForDistributor(distributorId: string): ExpireReminder[] {
  const reminders = JSON.parse(localStorage.getItem(STORAGE_KEYS.REMINDERS) || '[]') as ExpireReminder[];
  return reminders.filter(r => r.distributorId === distributorId);
}

/**
 * 获取未读提醒数量
 */
export function getUnreadReminderCount(distributorId: string): number {
  const reminders = getRemindersForDistributor(distributorId);
  return reminders.filter(r => !r.isRead).length;
}

/**
 * 标记提醒已读
 */
export function markReminderRead(reminderId: string): void {
  const reminders = JSON.parse(localStorage.getItem(STORAGE_KEYS.REMINDERS) || '[]') as ExpireReminder[];
  const index = reminders.findIndex(r => r.id === reminderId);
  
  if (index !== -1) {
    reminders[index].isRead = true;
    reminders[index].readAt = new Date().toISOString();
    localStorage.setItem(STORAGE_KEYS.REMINDERS, JSON.stringify(reminders));
  }
}

// ============== 分销商管理 ==============

/**
 * 获取分销商信息
 */
export function getDistributor(userId: string): Distributor | null {
  const distributors = JSON.parse(localStorage.getItem(STORAGE_KEYS.DISTRIBUTORS) || '[]') as Distributor[];
  return distributors.find(d => d.userId === userId) || null;
}

/**
 * 获取或创建分销商
 */
export function getOrCreateDistributor(params: {
  userId: string;
  nickname: string;
  phone: string;
  referralCode: string;
}): Distributor {
  let distributor = getDistributor(params.userId);
  
  if (!distributor) {
    const config = getDistributionConfig();
    distributor = {
      id: generateId('dist_'),
      userId: params.userId,
      nickname: params.nickname,
      phone: params.phone,
      referralCode: params.referralCode,
      totalClicks: 0,
      totalBindings: 0,
      activeBindings: 0,
      convertedBindings: 0,
      expiredBindings: 0,
      totalEarnings: 0,
      pendingEarnings: 0,
      withdrawnEarnings: 0,
      autoWithdraw: false,
      autoWithdrawThreshold: config.minWithdrawAmount,
      level: 'normal',
      commissionRate: config.defaultCommissionRate,
      status: 'active',
      createdAt: new Date().toISOString(),
      updatedAt: new Date().toISOString(),
    };
    
    const distributors = JSON.parse(localStorage.getItem(STORAGE_KEYS.DISTRIBUTORS) || '[]') as Distributor[];
    distributors.push(distributor);
    localStorage.setItem(STORAGE_KEYS.DISTRIBUTORS, JSON.stringify(distributors));
  }
  
  return distributor;
}

/**
 * 更新分销商统计
 */
function updateDistributorStats(userId: string): void {
  const distributors = JSON.parse(localStorage.getItem(STORAGE_KEYS.DISTRIBUTORS) || '[]') as Distributor[];
  const index = distributors.findIndex(d => d.userId === userId);
  
  if (index === -1) return;
  
  const bindings = getBindingsForDistributor(userId);
  const clicks = JSON.parse(localStorage.getItem(STORAGE_KEYS.CLICKS) || '[]') as ClickRecord[];
  const userClicks = clicks.filter(c => c.referrerId === userId);
  
  distributors[index] = {
    ...distributors[index],
    totalClicks: userClicks.length,
    totalBindings: bindings.length,
    activeBindings: bindings.filter(b => b.status === 'active').length,
    convertedBindings: bindings.filter(b => b.status === 'converted').length,
    expiredBindings: bindings.filter(b => b.status === 'expired').length,
    updatedAt: new Date().toISOString(),
  };
  
  localStorage.setItem(STORAGE_KEYS.DISTRIBUTORS, JSON.stringify(distributors));
}

/**
 * 增加分销商收益
 */
function addDistributorEarnings(userId: string, amount: number): void {
  const distributors = JSON.parse(localStorage.getItem(STORAGE_KEYS.DISTRIBUTORS) || '[]') as Distributor[];
  const index = distributors.findIndex(d => d.userId === userId);
  
  if (index === -1) return;
  
  distributors[index] = {
    ...distributors[index],
    totalEarnings: distributors[index].totalEarnings + amount,
    pendingEarnings: distributors[index].pendingEarnings + amount,
    updatedAt: new Date().toISOString(),
  };
  
  localStorage.setItem(STORAGE_KEYS.DISTRIBUTORS, JSON.stringify(distributors));
  
  // 检查是否需要自动提现
  checkAutoWithdraw(distributors[index]);
}

/**
 * 更新点击记录的购买状态
 */
function updateClickPurchaseStatus(referrerId: string, visitorId: string): void {
  const clicks = JSON.parse(localStorage.getItem(STORAGE_KEYS.CLICKS) || '[]') as ClickRecord[];
  const index = clicks.findIndex(c => c.referrerId === referrerId && c.visitorId === visitorId);
  
  if (index !== -1) {
    clicks[index].purchased = true;
    clicks[index].purchasedAt = new Date().toISOString();
    localStorage.setItem(STORAGE_KEYS.CLICKS, JSON.stringify(clicks));
  }
}

/**
 * 设置自动提现
 */
export function setAutoWithdraw(params: {
  userId: string;
  enabled: boolean;
  threshold?: number;
  account?: Distributor['autoWithdrawAccount'];
}): boolean {
  const distributors = JSON.parse(localStorage.getItem(STORAGE_KEYS.DISTRIBUTORS) || '[]') as Distributor[];
  const index = distributors.findIndex(d => d.userId === params.userId);
  
  if (index === -1) return false;
  
  distributors[index] = {
    ...distributors[index],
    autoWithdraw: params.enabled,
    autoWithdrawThreshold: params.threshold || distributors[index].autoWithdrawThreshold,
    autoWithdrawAccount: params.account || distributors[index].autoWithdrawAccount,
    updatedAt: new Date().toISOString(),
  };
  
  localStorage.setItem(STORAGE_KEYS.DISTRIBUTORS, JSON.stringify(distributors));
  return true;
}

// ============== 提现管理 ==============

/**
 * 获取所有提现记录
 */
export function getAllWithdrawals(): WithdrawRecord[] {
  if (typeof window === 'undefined') return [];
  return JSON.parse(localStorage.getItem(STORAGE_KEYS.WITHDRAWALS) || '[]');
}

/**
 * 获取分销商的提现记录
 */
export function getWithdrawalsForDistributor(distributorId: string): WithdrawRecord[] {
  const withdrawals = getAllWithdrawals();
  return withdrawals.filter(w => w.distributorId === distributorId);
}

/**
 * 申请提现
 */
export function requestWithdraw(params: {
  userId: string;
  amount: number;
  method: 'wechat' | 'alipay';
  account: string;
  accountName: string;
}): { success: boolean; withdrawal?: WithdrawRecord; error?: string } {
  const config = getDistributionConfig();
  const distributor = getDistributor(params.userId);
  
  if (!distributor) {
    return { success: false, error: '分销商不存在' };
  }
  
  if (params.amount < config.minWithdrawAmount) {
    return { success: false, error: `最低提现金额为 ${config.minWithdrawAmount} 元` };
  }
  
  if (params.amount > distributor.pendingEarnings) {
    return { success: false, error: '提现金额超过可提现余额' };
  }
  
  const fee = params.amount * config.withdrawFeeRate;
  const actualAmount = params.amount - fee;
  
  const withdrawal: WithdrawRecord = {
    id: generateId('withdraw_'),
    distributorId: distributor.id,
    userId: params.userId,
    userName: distributor.nickname,
    amount: params.amount,
    fee,
    actualAmount,
    method: params.method,
    account: params.account,
    accountName: params.accountName,
    status: 'pending',
    isAuto: false,
    createdAt: new Date().toISOString(),
  };
  
  // 保存提现记录
  const withdrawals = getAllWithdrawals();
  withdrawals.push(withdrawal);
  localStorage.setItem(STORAGE_KEYS.WITHDRAWALS, JSON.stringify(withdrawals));
  
  // 扣除待提现金额
  deductDistributorPendingEarnings(params.userId, params.amount);
  
  return { success: true, withdrawal };
}

/**
 * 扣除分销商待提现金额
 */
function deductDistributorPendingEarnings(userId: string, amount: number): void {
  const distributors = JSON.parse(localStorage.getItem(STORAGE_KEYS.DISTRIBUTORS) || '[]') as Distributor[];
  const index = distributors.findIndex(d => d.userId === userId);
  
  if (index !== -1) {
    distributors[index].pendingEarnings -= amount;
    localStorage.setItem(STORAGE_KEYS.DISTRIBUTORS, JSON.stringify(distributors));
  }
}

/**
 * 检查并执行自动提现
 */
function checkAutoWithdraw(distributor: Distributor): void {
  if (!distributor.autoWithdraw || !distributor.autoWithdrawAccount) {
    return;
  }
  
  if (distributor.pendingEarnings >= distributor.autoWithdrawThreshold) {
    // 执行自动提现
    const result = executeAutoWithdraw(distributor);
    if (result.success) {
      console.log(`自动提现成功: ${distributor.nickname}, 金额: ${distributor.pendingEarnings}`);
    }
  }
}

/**
 * 执行自动提现
 */
export function executeAutoWithdraw(distributor: Distributor): { success: boolean; withdrawal?: WithdrawRecord; error?: string } {
  if (!distributor.autoWithdrawAccount) {
    return { success: false, error: '未配置自动提现账户' };
  }
  
  const config = getDistributionConfig();
  const amount = distributor.pendingEarnings;
  const fee = amount * config.withdrawFeeRate;
  const actualAmount = amount - fee;
  
  const withdrawal: WithdrawRecord = {
    id: generateId('withdraw_'),
    distributorId: distributor.id,
    userId: distributor.userId,
    userName: distributor.nickname,
    amount,
    fee,
    actualAmount,
    method: distributor.autoWithdrawAccount.type,
    account: distributor.autoWithdrawAccount.account,
    accountName: distributor.autoWithdrawAccount.name,
    status: 'processing',  // 自动提现直接进入处理状态
    isAuto: true,
    createdAt: new Date().toISOString(),
  };
  
  // 保存提现记录
  const withdrawals = getAllWithdrawals();
  withdrawals.push(withdrawal);
  localStorage.setItem(STORAGE_KEYS.WITHDRAWALS, JSON.stringify(withdrawals));
  
  // 扣除待提现金额
  deductDistributorPendingEarnings(distributor.userId, amount);
  
  // 这里应该调用实际的支付接口进行打款
  // 实际项目中需要对接微信/支付宝的企业付款接口
  processWithdrawalPayment(withdrawal.id);
  
  return { success: true, withdrawal };
}

/**
 * 处理提现打款（模拟）
 * 实际项目中需要对接支付接口
 */
export async function processWithdrawalPayment(withdrawalId: string): Promise<{ success: boolean; error?: string }> {
  const withdrawals = getAllWithdrawals();
  const index = withdrawals.findIndex(w => w.id === withdrawalId);
  
  if (index === -1) {
    return { success: false, error: '提现记录不存在' };
  }
  
  const withdrawal = withdrawals[index];
  
  // 模拟支付接口调用
  // 实际项目中应该调用：
  // - 微信：企业付款到零钱 API
  // - 支付宝：单笔转账到支付宝账户 API
  
  try {
    // 模拟网络延迟
    await new Promise(resolve => setTimeout(resolve, 1000));
    
    // 更新提现状态为成功
    withdrawals[index] = {
      ...withdrawal,
      status: 'completed',
      paymentNo: `PAY${Date.now()}`,
      paymentTime: new Date().toISOString(),
      completedAt: new Date().toISOString(),
    };
    
    localStorage.setItem(STORAGE_KEYS.WITHDRAWALS, JSON.stringify(withdrawals));
    
    // 更新分销商已提现金额
    const distributors = JSON.parse(localStorage.getItem(STORAGE_KEYS.DISTRIBUTORS) || '[]') as Distributor[];
    const distIndex = distributors.findIndex(d => d.userId === withdrawal.userId);
    
    if (distIndex !== -1) {
      distributors[distIndex].withdrawnEarnings += withdrawal.amount;
      localStorage.setItem(STORAGE_KEYS.DISTRIBUTORS, JSON.stringify(distributors));
    }
    
    return { success: true };
  } catch (error) {
    // 打款失败
    withdrawals[index] = {
      ...withdrawal,
      status: 'failed',
      paymentError: error instanceof Error ? error.message : '打款失败',
    };
    
    localStorage.setItem(STORAGE_KEYS.WITHDRAWALS, JSON.stringify(withdrawals));
    
    // 退还金额到待提现余额
    const distributors = JSON.parse(localStorage.getItem(STORAGE_KEYS.DISTRIBUTORS) || '[]') as Distributor[];
    const distIndex = distributors.findIndex(d => d.userId === withdrawal.userId);
    
    if (distIndex !== -1) {
      distributors[distIndex].pendingEarnings += withdrawal.amount;
      localStorage.setItem(STORAGE_KEYS.DISTRIBUTORS, JSON.stringify(distributors));
    }
    
    return { success: false, error: '打款失败' };
  }
}

/**
 * 审核通过并打款
 */
export async function approveWithdrawal(withdrawalId: string, reviewedBy?: string): Promise<{ success: boolean; error?: string }> {
  const withdrawals = getAllWithdrawals();
  const index = withdrawals.findIndex(w => w.id === withdrawalId);
  
  if (index === -1) {
    return { success: false, error: '提现记录不存在' };
  }
  
  if (withdrawals[index].status !== 'pending') {
    return { success: false, error: '该提现申请已处理' };
  }
  
  withdrawals[index] = {
    ...withdrawals[index],
    status: 'processing',
    reviewedBy,
    reviewedAt: new Date().toISOString(),
  };
  
  localStorage.setItem(STORAGE_KEYS.WITHDRAWALS, JSON.stringify(withdrawals));
  
  // 执行打款
  return processWithdrawalPayment(withdrawalId);
}

/**
 * 拒绝提现
 */
export function rejectWithdrawal(withdrawalId: string, reason: string, reviewedBy?: string): { success: boolean; error?: string } {
  const withdrawals = getAllWithdrawals();
  const index = withdrawals.findIndex(w => w.id === withdrawalId);
  
  if (index === -1) {
    return { success: false, error: '提现记录不存在' };
  }
  
  const withdrawal = withdrawals[index];
  
  if (withdrawal.status !== 'pending') {
    return { success: false, error: '该提现申请已处理' };
  }
  
  withdrawals[index] = {
    ...withdrawal,
    status: 'rejected',
    reviewNote: reason,
    reviewedBy,
    reviewedAt: new Date().toISOString(),
  };
  
  localStorage.setItem(STORAGE_KEYS.WITHDRAWALS, JSON.stringify(withdrawals));
  
  // 退还金额到待提现余额
  const distributors = JSON.parse(localStorage.getItem(STORAGE_KEYS.DISTRIBUTORS) || '[]') as Distributor[];
  const distIndex = distributors.findIndex(d => d.userId === withdrawal.userId);
  
  if (distIndex !== -1) {
    distributors[distIndex].pendingEarnings += withdrawal.amount;
    localStorage.setItem(STORAGE_KEYS.DISTRIBUTORS, JSON.stringify(distributors));
  }
  
  return { success: true };
}

// ============== 统计概览 ==============

/**
 * 获取分销统计概览
 */
export function getDistributionOverview(): DistributionOverview {
  const bindings = getAllBindings();
  const clicks = JSON.parse(localStorage.getItem(STORAGE_KEYS.CLICKS) || '[]') as ClickRecord[];
  const withdrawals = getAllWithdrawals();
  
  const now = new Date();
  const today = new Date(now.getFullYear(), now.getMonth(), now.getDate());
  const monthStart = new Date(now.getFullYear(), now.getMonth(), 1);
  const weekFromNow = new Date();
  weekFromNow.setDate(weekFromNow.getDate() + 7);
  
  // 今日数据
  const todayClicks = clicks.filter(c => new Date(c.clickTime) >= today).length;
  const todayBindings = bindings.filter(b => new Date(b.createdAt) >= today).length;
  const todayConversions = bindings.filter(b => 
    b.status === 'converted' && b.convertedAt && new Date(b.convertedAt) >= today
  ).length;
  const todayEarnings = bindings
    .filter(b => b.status === 'converted' && b.convertedAt && new Date(b.convertedAt) >= today)
    .reduce((sum, b) => sum + (b.commission || 0), 0);
  
  // 本月数据
  const monthClicks = clicks.filter(c => new Date(c.clickTime) >= monthStart).length;
  const monthBindings = bindings.filter(b => new Date(b.createdAt) >= monthStart).length;
  const monthConversions = bindings.filter(b => 
    b.status === 'converted' && b.convertedAt && new Date(b.convertedAt) >= monthStart
  ).length;
  const monthEarnings = bindings
    .filter(b => b.status === 'converted' && b.convertedAt && new Date(b.convertedAt) >= monthStart)
    .reduce((sum, b) => sum + (b.commission || 0), 0);
  
  // 总计数据
  const totalConversions = bindings.filter(b => b.status === 'converted').length;
  const totalEarnings = bindings
    .filter(b => b.status === 'converted')
    .reduce((sum, b) => sum + (b.commission || 0), 0);
  
  // 即将过期数据
  const expiringBindings = bindings.filter(b => 
    b.status === 'active' && 
    new Date(b.expireTime) <= weekFromNow &&
    new Date(b.expireTime) > now
  ).length;
  
  const expiredToday = bindings.filter(b => 
    b.status === 'expired' && 
    b.updatedAt && new Date(b.updatedAt) >= today
  ).length;
  
  // 提现数据
  const pendingWithdrawals = withdrawals.filter(w => w.status === 'pending').length;
  const pendingWithdrawAmount = withdrawals
    .filter(w => w.status === 'pending')
    .reduce((sum, w) => sum + w.amount, 0);
  
  // 转化率
  const conversionRate = clicks.length > 0 ? (totalConversions / clicks.length) * 100 : 0;
  
  return {
    todayClicks,
    todayBindings,
    todayConversions,
    todayEarnings,
    monthClicks,
    monthBindings,
    monthConversions,
    monthEarnings,
    totalClicks: clicks.length,
    totalBindings: bindings.length,
    totalConversions,
    totalEarnings,
    expiringBindings,
    expiredToday,
    pendingWithdrawals,
    pendingWithdrawAmount,
    conversionRate,
    lastUpdated: now.toISOString(),
  };
}

/**
 * 获取分销排行榜
 */
export function getDistributionRanking(limit: number = 10): Distributor[] {
  const distributors = JSON.parse(localStorage.getItem(STORAGE_KEYS.DISTRIBUTORS) || '[]') as Distributor[];
  return distributors
    .filter(d => d.status === 'active')
    .sort((a, b) => b.totalEarnings - a.totalEarnings)
    .slice(0, limit);
}

/**
 * 获取所有分销商
 */
export function getAllDistributors(): Distributor[] {
  if (typeof window === 'undefined') return [];
  return JSON.parse(localStorage.getItem(STORAGE_KEYS.DISTRIBUTORS) || '[]');
}