import { Provide } from '@midwayjs/core';
import { BaseService } from '@cool-midway/core';
import { InjectEntityModel } from '@midwayjs/typeorm';
import { Repository } from 'typeorm';
import * as moment from 'moment';
import { TeamInvoiceEntity } from '../entity/invoice';
import { TeamSubscriptionEntity } from '../entity/subscription';
import {
  ManualRenewDTO,
  PlanConfigItem,
  PlatformOverviewResult,
  RenewalOrderItem,
  SubscriberItem,
  TenantPlanType,
  UpdateSubscriberDTO,
} from '../../../comm/types/omni';

/**
 * 平台总后台超级管理员 (Platform Super Admin)
 * 会员、续费与订阅全周期运营管控服务
 */
@Provide()
export class PlatformSubscriptionService extends BaseService {
  @InjectEntityModel(TeamInvoiceEntity)
  teamInvoiceEntity?: Repository<TeamInvoiceEntity>;

  @InjectEntityModel(TeamSubscriptionEntity)
  teamSubscriptionEntity?: Repository<TeamSubscriptionEntity>;

  // 内存化种子会员数据池 (保障无缝离线测试与即席演示)
  private subscribersStore: SubscriberItem[] = [
    {
      id: 1,
      tenantId: 1,
      tenantName: 'Vanguard Global Trade Ltd. (出海先锋外贸)',
      adminName: 'David Zhang',
      adminEmail: 'david@vanguard-trade.com',
      adminPhone: '+86 13800138001',
      planType: 'enterprise',
      status: 'active',
      cardsUsed: 42,
      cardsLimit: 100,
      seatsUsed: 18,
      seatsLimit: 50,
      totalPaidAmount: 7176,
      currency: 'USD',
      startDate: '2025-09-01',
      expireDate: '2026-09-01',
      createdAt: '2025-08-28 10:20:00',
    },
    {
      id: 2,
      tenantId: 2,
      tenantName: 'Berlin Precision Robotics GmbH (柏林精密机器人)',
      adminName: 'Klaus Schmidt',
      adminEmail: 'klaus@berlin-robotics.de',
      adminPhone: '+49 30 1234567',
      planType: 'pro',
      status: 'active',
      cardsUsed: 5,
      cardsLimit: 10,
      seatsUsed: 4,
      seatsLimit: 5,
      totalPaidAmount: 1176,
      currency: 'EUR',
      startDate: '2026-01-15',
      expireDate: '2027-01-15',
      createdAt: '2026-01-10 14:35:12',
    },
    {
      id: 3,
      tenantId: 3,
      tenantName: 'Dubai Apex Logistics LLC (迪拜巅峰国际物流)',
      adminName: 'Ahmed Al-Mansoor',
      adminEmail: 'ahmed@apexlogistics.ae',
      adminPhone: '+971 4 9876543',
      planType: 'enterprise',
      status: 'active',
      cardsUsed: 35,
      cardsLimit: 100,
      seatsUsed: 12,
      seatsLimit: 50,
      totalPaidAmount: 3588,
      currency: 'USD',
      startDate: '2026-03-01',
      expireDate: '2027-03-01',
      createdAt: '2026-02-25 09:12:44',
    },
    {
      id: 4,
      tenantId: 4,
      tenantName: 'Silicon Horizon Tech Inc. (硅谷地平线科技)',
      adminName: 'Sarah Jenkins',
      adminEmail: 'sarah@siliconhorizon.io',
      adminPhone: '+1 415 8009988',
      planType: 'pro',
      status: 'past_due',
      cardsUsed: 8,
      cardsLimit: 10,
      seatsUsed: 5,
      seatsLimit: 5,
      totalPaidAmount: 588,
      currency: 'USD',
      startDate: '2025-09-10',
      expireDate: '2026-09-10',
      createdAt: '2025-09-05 16:40:22',
    },
    {
      id: 5,
      tenantId: 5,
      tenantName: 'Nordic Clean Energy AB (北欧洁能科技)',
      adminName: 'Erik Lindqvist',
      adminEmail: 'erik@nordic-energy.se',
      adminPhone: '+46 8 5556677',
      planType: 'pro',
      status: 'active',
      cardsUsed: 4,
      cardsLimit: 10,
      seatsUsed: 3,
      seatsLimit: 5,
      totalPaidAmount: 1176,
      currency: 'EUR',
      startDate: '2025-11-20',
      expireDate: '2026-11-20',
      createdAt: '2025-11-15 11:20:00',
    },
    {
      id: 6,
      tenantId: 6,
      tenantName: 'Tokyo Smart Automation KK (东京智能物联)',
      adminName: 'Kenji Sato',
      adminEmail: 'kenji@tokyo-smart.jp',
      adminPhone: '+81 3 33445566',
      planType: 'free',
      status: 'active',
      cardsUsed: 1,
      cardsLimit: 1,
      seatsUsed: 1,
      seatsLimit: 1,
      totalPaidAmount: 0,
      currency: 'USD',
      startDate: '2026-08-01',
      expireDate: '2099-12-31',
      createdAt: '2026-08-01 10:00:00',
    },
  ];

  // 内存化种子续费流水池
  private renewalsStore: RenewalOrderItem[] = [
    {
      id: 1,
      orderNo: 'ORD-20260921-0089',
      tenantId: 1,
      tenantName: 'Vanguard Global Trade Ltd.',
      planType: 'enterprise',
      billingCycle: 'yearly',
      amount: 3588,
      currency: 'USD',
      channel: 'stripe',
      status: 'paid',
      paidAt: '2026-09-21 00:15:20',
      createdAt: '2026-09-21 00:15:10',
    },
    {
      id: 2,
      orderNo: 'ORD-20260920-0088',
      tenantId: 2,
      tenantName: 'Berlin Precision Robotics GmbH',
      planType: 'pro',
      billingCycle: 'yearly',
      amount: 588,
      currency: 'EUR',
      channel: 'stripe',
      status: 'paid',
      paidAt: '2026-09-20 18:42:10',
      createdAt: '2026-09-20 18:42:00',
    },
    {
      id: 3,
      orderNo: 'ORD-20260920-0087',
      tenantId: 3,
      tenantName: 'Dubai Apex Logistics LLC',
      planType: 'enterprise',
      billingCycle: 'monthly',
      amount: 299,
      currency: 'USD',
      channel: 'wire_transfer',
      status: 'paid',
      paidAt: '2026-09-20 14:22:05',
      createdAt: '2026-09-20 14:10:00',
    },
    {
      id: 4,
      orderNo: 'ORD-20260919-0086',
      tenantId: 4,
      tenantName: 'Silicon Horizon Tech Inc.',
      planType: 'pro',
      billingCycle: 'monthly',
      amount: 49,
      currency: 'USD',
      channel: 'stripe',
      status: 'pending',
      paidAt: '',
      createdAt: '2026-09-19 22:11:34',
    },
    {
      id: 5,
      orderNo: 'ORD-20260919-0085',
      tenantId: 5,
      tenantName: 'Nordic Clean Energy AB',
      planType: 'pro',
      billingCycle: 'yearly',
      amount: 588,
      currency: 'EUR',
      channel: 'manual_admin',
      status: 'paid',
      paidAt: '2026-09-19 11:05:49',
      createdAt: '2026-09-19 11:05:00',
    },
  ];

  // SaaS 套餐规格与定价方案配置
  private planConfigs: PlanConfigItem[] = [
    {
      planType: 'free',
      name: 'Free 基础体验版',
      description: '适合个人自由职业者与初创独立人，轻量体验出海名片微官网',
      monthlyPrice: 0,
      yearlyPrice: 0,
      cardsLimit: 1,
      seatsLimit: 1,
      aiTokensPerMonth: 5000,
      nfcDynamicRouting: false,
      supportCustomDomain: false,
      crmLeadLimit: 50,
      isPopular: false,
    },
    {
      planType: 'pro',
      name: 'Pro 专业商务版',
      description: '面向出海业务精英、外贸销售主管与跨国顾问的高性能全功能套件',
      monthlyPrice: 49,
      yearlyPrice: 490,
      cardsLimit: 10,
      seatsLimit: 5,
      aiTokensPerMonth: 200000,
      nfcDynamicRouting: true,
      supportCustomDomain: true,
      crmLeadLimit: 2000,
      isPopular: true,
    },
    {
      planType: 'enterprise',
      name: 'Enterprise 商业企业版',
      description: '为出海跨国集团、参展销售天团定制的多租户公海池与品牌统一管控',
      monthlyPrice: 299,
      yearlyPrice: 2990,
      cardsLimit: 100,
      seatsLimit: 50,
      aiTokensPerMonth: 1000000,
      nfcDynamicRouting: true,
      supportCustomDomain: true,
      crmLeadLimit: 50000,
      isPopular: false,
    },
  ];

  /**
   * 1. 平台总览与核心 KPI 概览
   */
  async getOverview(): Promise<PlatformOverviewResult> {
    const totalSubscribers = this.subscribersStore.length;
    const activeSubscribers = this.subscribersStore.filter(
      s => s.status === 'active' || s.status === 'trialing'
    ).length;
    const proCount = this.subscribersStore.filter(s => s.planType === 'pro').length;
    const enterpriseCount = this.subscribersStore.filter(s => s.planType === 'enterprise').length;

    // 即将到期判定 (当前日期后 30 天内到期)
    const now = moment();
    const expiringSoonCount = this.subscribersStore.filter(s => {
      if (s.planType === 'free') return false;
      const exp = moment(s.expireDate);
      const diffDays = exp.diff(now, 'days');
      return diffDays >= -5 && diffDays <= 30;
    }).length;

    const totalRenewalRevenue = this.renewalsStore
      .filter(r => r.status === 'paid')
      .reduce((sum, r) => sum + Number(r.amount || 0), 0);

    return {
      totalSubscribers,
      activeSubscribers,
      proCount,
      enterpriseCount,
      expiringSoonCount,
      totalRenewalRevenue,
      currency: 'USD',
    };
  }

  /**
   * 2. 分页及多条件查询全网会员列表
   */
  async getSubscribers(query: {
    page?: number;
    size?: number;
    planType?: TenantPlanType;
    status?: string;
    keyword?: string;
  } = {}): Promise<{
    list: SubscriberItem[];
    pagination: { page: number; size: number; total: number };
  }> {
    const page = Number(query.page || 1);
    const size = Number(query.size || 20);

    let filtered = [...this.subscribersStore];

    if (query.planType) {
      filtered = filtered.filter(s => s.planType === query.planType);
    }
    if (query.status) {
      filtered = filtered.filter(s => s.status === query.status);
    }
    if (query.keyword) {
      const kw = query.keyword.toLowerCase().trim();
      filtered = filtered.filter(
        s =>
          String(s.tenantId).includes(kw) ||
          s.tenantName.toLowerCase().includes(kw) ||
          s.adminEmail.toLowerCase().includes(kw) ||
          s.adminName.toLowerCase().includes(kw)
      );
    }

    const total = filtered.length;
    const start = (page - 1) * size;
    const list = filtered.slice(start, start + size).map(item => ({ ...item }));

    return {
      list,
      pagination: {
        page,
        size,
        total,
      },
    };
  }

  /**
   * 3. 超级管理员修改会员信息 (套餐、配额、延期、状态)
   */
  async updateSubscriber(dto: UpdateSubscriberDTO): Promise<SubscriberItem> {
    const item = this.subscribersStore.find(s => s.tenantId === Number(dto.tenantId));
    if (!item) {
      throw new Error(`未找到租户 ID 为 ${dto.tenantId} 的会员`);
    }

    if (dto.planType) {
      item.planType = dto.planType;
      // 联动规格默认配额
      const targetPlan = this.planConfigs.find(p => p.planType === dto.planType);
      if (targetPlan) {
        item.cardsLimit = targetPlan.cardsLimit;
        item.seatsLimit = targetPlan.seatsLimit;
      }
    }

    if (typeof dto.cardsLimit === 'number') {
      item.cardsLimit = dto.cardsLimit;
    }
    if (typeof dto.seatsLimit === 'number') {
      item.seatsLimit = dto.seatsLimit;
    }
    if (dto.status) {
      item.status = dto.status;
    }

    if (dto.extendDays && dto.extendDays > 0) {
      const baseDate = moment(item.expireDate).isValid()
        ? moment(item.expireDate)
        : moment();
      item.expireDate = baseDate.add(dto.extendDays, 'days').format('YYYY-MM-DD');
      item.status = 'active';
    } else if (dto.expireDate) {
      item.expireDate = dto.expireDate;
    }

    return { ...item };
  }

  /**
   * 4. 查询全网续费订单流水台账
   */
  async getRenewals(query: {
    page?: number;
    size?: number;
    status?: string;
    keyword?: string;
  } = {}): Promise<{
    list: RenewalOrderItem[];
    pagination: { page: number; size: number; total: number };
  }> {
    const page = Number(query.page || 1);
    const size = Number(query.size || 20);

    let filtered = [...this.renewalsStore];

    if (query.status) {
      filtered = filtered.filter(r => r.status === query.status);
    }
    if (query.keyword) {
      const kw = query.keyword.toLowerCase().trim();
      filtered = filtered.filter(
        r =>
          r.orderNo.toLowerCase().includes(kw) ||
          r.tenantName.toLowerCase().includes(kw) ||
          String(r.tenantId).includes(kw)
      );
    }

    const total = filtered.length;
    const start = (page - 1) * size;
    const list = filtered.slice(start, start + size);

    return {
      list,
      pagination: {
        page,
        size,
        total,
      },
    };
  }

  /**
   * 5. 超管手动为会员代续费 / 补录订单
   */
  async manualRenew(dto: ManualRenewDTO): Promise<{
    success: boolean;
    orderNo: string;
    item: RenewalOrderItem;
    subscriber: SubscriberItem;
  }> {
    const subscriber = this.subscribersStore.find(s => s.tenantId === Number(dto.tenantId));
    if (!subscriber) {
      throw new Error(`租户 ${dto.tenantId} 不存在`);
    }

    const orderNo = `ORD-${moment().format('YYYYMMDD')}-${Math.floor(
      1000 + Math.random() * 9000
    )}`;
    const nowStr = moment().format('YYYY-MM-DD HH:mm:ss');

    const newOrder: RenewalOrderItem = {
      id: this.renewalsStore.length + 1,
      orderNo,
      tenantId: subscriber.tenantId,
      tenantName: subscriber.tenantName,
      planType: dto.planType,
      billingCycle: dto.billingCycle,
      amount: dto.amount,
      currency: dto.currency || 'USD',
      channel: dto.channel || 'manual_admin',
      status: 'paid',
      paidAt: nowStr,
      createdAt: nowStr,
    };

    this.renewalsStore.unshift(newOrder);

    // 更新会员期限和套餐
    subscriber.planType = dto.planType;
    const addDays = dto.billingCycle === 'yearly' ? 365 : 30;
    const baseExpire = moment(subscriber.expireDate).isAfter(moment())
      ? moment(subscriber.expireDate)
      : moment();
    subscriber.expireDate = baseExpire.add(addDays, 'days').format('YYYY-MM-DD');
    subscriber.status = 'active';
    subscriber.totalPaidAmount = Number(subscriber.totalPaidAmount || 0) + Number(dto.amount);

    return {
      success: true,
      orderNo,
      item: newOrder,
      subscriber,
    };
  }

  /**
   * 6. SaaS 套餐定价规格列表
   */
  async getPlans(): Promise<PlanConfigItem[]> {
    return [...this.planConfigs];
  }

  /**
   * 7. 更新指定套餐定价与配额参数
   */
  async updatePlan(
    planType: TenantPlanType,
    params: Partial<PlanConfigItem>
  ): Promise<PlanConfigItem> {
    const plan = this.planConfigs.find(p => p.planType === planType);
    if (!plan) {
      throw new Error(`套餐类型 ${planType} 不存在`);
    }

    Object.assign(plan, params);
    return plan;
  }
}