/**
 * Sales Chat 统一插件服务
 *
 * 所有操作合并到一个服务 plugin:com.msgbyte.saleschat 中，
 * 以避免 Tailchat 网关 mappingPolicy:'all' 对多冒号服务名路由失败的问题。
 *
 * 主数据库模型：Invite（通过 registerLocalDb）
 * 辅助模型：AccessLog, Stats, KickRecord, DeletionRecord（通过直接 require）
 */

import { TcService, TcDbService, TcContext, call } from 'tailchat-server-sdk';
import type { InviteDocument, InviteModel } from '../models/invite';
import { nanoid } from 'nanoid';
import QRCode from 'qrcode';

interface SalesChatService
  extends TcService,
    TcDbService<InviteDocument, InviteModel> {}
class SalesChatService extends TcService {
  get serviceName(): string {
    return 'plugin:com.msgbyte.saleschat';
  }

  private _accessLogModel: any;
  private _statsModel: any;
  private _deletionRecordModel: any;
  private _kickRecordModel: any;

  onInit(): void {
    this.registerLocalDb(require('../models/invite').default);
    this._accessLogModel = require('../models/accesslog').default;
    this._statsModel = require('../models/stats').default;
    this._deletionRecordModel = require('../models/deletionrecord').default;
    this._kickRecordModel = require('../models/kickrecord').default;

    // ====== 邀请相关 ======
    this.registerAction('inviteCreate', this.inviteCreate, {
      params: {
        groupId: 'string',
        expiresIn: { type: 'number', optional: true },
      },
      visibility: 'published',
    });

    this.registerAction('inviteGetMyInvites', this.inviteGetMyInvites, {
      visibility: 'published',
    });

    this.registerAction('inviteGetByCode', this.inviteGetByCode, {
      params: { code: 'string' },
      visibility: 'published',
    });

    this.registerAction('inviteGetStats', this.inviteGetStats, {
      params: { code: 'string' },
      visibility: 'published',
    });

    this.registerAction('inviteDeactivate', this.inviteDeactivate, {
      params: { code: 'string' },
      visibility: 'published',
    });

    this.registerAction('inviteJoin', this.inviteJoin, {
      params: { code: 'string' },
      visibility: 'published',
    });

    // ====== 统计相关 ======
    this.registerAction('statsGetMyStats', this.statsGetMyStats, {
      visibility: 'published',
    });

    this.registerAction('statsGetTeamStats', this.statsGetTeamStats, {
      visibility: 'published',
    });

    this.registerAction('statsGetPlatformStats', this.statsGetPlatformStats, {
      visibility: 'published',
    });

    this.registerAction('statsGetRanking', this.statsGetRanking, {
      params: { period: { type: 'string', optional: true } },
      visibility: 'published',
    });

    this.registerAction('statsGetTrend', this.statsGetTrend, {
      params: {
        salesId: 'string',
        period: { type: 'string', optional: true },
      },
      visibility: 'published',
    });

    // ====== 管理员相关 ======
    this.registerAction('adminGetUserList', this.adminGetUserList, {
      visibility: 'published',
    });

    this.registerAction('adminUpdateUserRole', this.adminUpdateUserRole, {
      params: { userId: 'string', role: 'string' },
      visibility: 'published',
    });

    this.registerAction('adminDeleteUser', this.adminDeleteUser, {
      params: {
        userId: 'string',
        type: { type: 'string', optional: true },
        reason: { type: 'string', optional: true },
      },
      visibility: 'published',
    });

    this.registerAction('adminGetGroupList', this.adminGetGroupList, {
      visibility: 'published',
    });

    this.registerAction('adminGetGroupStats', this.adminGetGroupStats, {
      params: { groupId: 'string' },
      visibility: 'published',
    });

    this.registerAction('adminKickUser', this.adminKickUser, {
      params: {
        groupId: 'string',
        userId: 'string',
        reason: { type: 'string', optional: true },
      },
      visibility: 'published',
    });

    console.log('Sales Chat Plugin 已加载');
  }

  // ============================================================
  // 邀请操作
  // ============================================================

  async inviteCreate(ctx: TcContext<{ groupId: string; expiresIn?: number }>) {
    const userId = ctx.meta.userId;
    if (!userId) throw new Error('未登录');

    const { groupId, expiresIn } = ctx.params;

    const group = await call(ctx).getGroupInfo(groupId);
    if (!group) throw new Error('群组不存在');

    const code = nanoid(8);
    const baseUrl = process.env.INVITE_BASE_URL || 'http://localhost:11000';
    const link = `${baseUrl}/join/${code}`;
    const expiresAt = expiresIn
      ? new Date(Date.now() + expiresIn * 24 * 60 * 60 * 1000)
      : null;

    const qrCodeUrl = await QRCode.toDataURL(link, {
      width: 300,
      margin: 2,
    });

    const doc = await this.adapter.model.create({
      code,
      salesId: userId,
      groupId,
      link,
      qrCodeUrl,
      expiresAt,
      clickCount: 0,
      scanCount: 0,
      joinCount: 0,
      status: 'active',
    });

    return await this.transformDocuments(ctx, {}, doc);
  }

  async inviteGetMyInvites(ctx: TcContext) {
    const userId = ctx.meta.userId;
    if (!userId) throw new Error('未登录');

    const docs = await this.adapter.model
      .find({ salesId: userId })
      .sort('-createdAt')
      .exec();

    return await this.transformDocuments(ctx, {}, docs);
  }

  async inviteGetByCode(ctx: TcContext<{ code: string }>) {
    const { code } = ctx.params;

    const invite = await this.adapter.model.findOne({ code }).exec();
    if (!invite) throw new Error('邀请不存在');
    if (invite.expiresAt && new Date() > invite.expiresAt)
      throw new Error('邀请已过期');

    await this.adapter.model.updateOne(
      { _id: invite._id },
      { $inc: { clickCount: 1 } }
    );

    return {
      code: invite.code,
      link: invite.link,
      groupId: invite.groupId,
      createdAt: invite.createdAt,
      expiresAt: invite.expiresAt,
    };
  }

  async inviteGetStats(ctx: TcContext<{ code: string }>) {
    const { code } = ctx.params;
    const userId = ctx.meta.userId;
    if (!userId) throw new Error('未登录');

    const invite = await this.adapter.model.findOne({ code }).exec();
    if (!invite) throw new Error('邀请不存在');
    if (String(invite.salesId) !== String(userId))
      throw new Error('无权限查看');

    const AccessLog = this._accessLogModel;
    const logs = await AccessLog.find({ inviteCode: code })
      .sort('-timestamp')
      .limit(10)
      .exec();

    return {
      code: invite.code,
      link: invite.link,
      createdAt: invite.createdAt,
      expiresAt: invite.expiresAt,
      stats: {
        clicks: invite.clickCount,
        scans: invite.scanCount,
        joins: invite.joinCount,
        conversionRate:
          invite.clickCount > 0
            ? ((invite.joinCount / invite.clickCount) * 100).toFixed(2)
            : '0',
      },
      recentAccess: logs.map((l: any) => l.toObject()),
    };
  }

  async inviteDeactivate(ctx: TcContext<{ code: string }>) {
    const { code } = ctx.params;
    const userId = ctx.meta.userId;
    if (!userId) throw new Error('未登录');

    const invite = await this.adapter.model.findOne({ code }).exec();
    if (!invite) throw new Error('邀请不存在');
    if (String(invite.salesId) !== String(userId))
      throw new Error('无权限操作');

    await this.adapter.model.updateOne(
      { _id: invite._id },
      { $set: { status: 'inactive', expiresAt: new Date(0) } }
    );

    return { message: '邀请已停用' };
  }

  async inviteJoin(ctx: TcContext<{ code: string }>) {
    const { code } = ctx.params;
    const userId = ctx.meta.userId;
    if (!userId) throw new Error('未登录');

    const invite = await this.adapter.model.findOne({ code }).exec();
    if (!invite) throw new Error('邀请不存在');
    if (invite.expiresAt && new Date() > invite.expiresAt)
      throw new Error('邀请已过期');

    await ctx.call('group.joinGroup', {
      groupId: invite.groupId,
      userId,
    });

    await this.adapter.model.updateOne(
      { _id: invite._id },
      { $inc: { joinCount: 1 } }
    );

    const AccessLog = this._accessLogModel;
    await AccessLog.create({
      inviteCode: code,
      accessType: 'join',
      timestamp: new Date(),
    });

    return { message: '加入成功', groupId: invite.groupId };
  }

  // ============================================================
  // 统计操作
  // ============================================================

  async statsGetMyStats(ctx: TcContext) {
    const userId = ctx.meta.userId;
    if (!userId) throw new Error('未登录');

    const Stats = this._statsModel;

    const totalStats: any[] = await Stats.aggregate([
      { $match: { salesId: userId } },
      {
        $group: {
          _id: null,
          totalInvites: { $sum: '$invitesCreated' },
          totalJoins: { $sum: '$joins' },
          totalConversions: { $sum: '$conversions' },
          totalRevenue: { $sum: '$revenue' },
        } as any,
      },
    ]).exec();

    const today = new Date();
    today.setHours(0, 0, 0, 0);

    const todayDoc = await Stats.findOne({
      salesId: userId,
      date: today,
      period: 'daily',
    }).exec();

    const invites = await this.adapter.model
      .find({ salesId: userId })
      .sort('-createdAt')
      .limit(10)
      .exec();
    const recentInvites = await this.transformDocuments(ctx, {}, invites);

    return {
      total: totalStats[0] || {
        totalInvites: 0,
        totalJoins: 0,
        totalConversions: 0,
        totalRevenue: 0,
      },
      today: todayDoc
        ? await this.transformDocuments(ctx, {}, todayDoc)
        : {
            invitesCreated: 0,
            joins: 0,
            conversions: 0,
            revenue: 0,
          },
      recentInvites,
    };
  }

  async statsGetTeamStats(ctx: TcContext) {
    const userId = ctx.meta.userId;
    if (!userId) throw new Error('未登录');

    const Stats = this._statsModel;

    const teamStats: any[] = await Stats.aggregate([
      {
        $group: {
          _id: '$salesId',
          totalInvites: { $sum: '$invitesCreated' },
          totalJoins: { $sum: '$joins' },
          totalConversions: { $sum: '$conversions' },
          totalRevenue: { $sum: '$revenue' },
        } as any,
      },
      { $sort: { totalJoins: -1 } },
    ]).exec();

    const userIds = teamStats.map((s: any) => s._id);
    const users: any[] = await ctx.call('user.getUsers', { userIds });

    return teamStats.map((stat: any) => ({
      ...stat,
      user: users.find((u: any) => String(u._id) === String(stat._id)),
    }));
  }

  async statsGetPlatformStats(ctx: TcContext) {
    const userId = ctx.meta.userId;
    if (!userId) throw new Error('未登录');

    const Stats = this._statsModel;

    const platformStats: any[] = await Stats.aggregate([
      {
        $group: {
          _id: null,
          totalInvites: { $sum: '$invitesCreated' },
          totalJoins: { $sum: '$joins' },
          totalConversions: { $sum: '$conversions' },
          totalRevenue: { $sum: '$revenue' },
          totalUsers: { $sum: 1 },
        } as any,
      },
    ]).exec();

    const today = new Date();
    today.setHours(0, 0, 0, 0);

    const todayStats: any[] = await Stats.aggregate([
      { $match: { date: today, period: 'daily' } },
      {
        $group: {
          _id: null,
          invitesCreated: { $sum: '$invitesCreated' },
          joins: { $sum: '$joins' },
          conversions: { $sum: '$conversions' },
          revenue: { $sum: '$revenue' },
        } as any,
      },
    ]).exec();

    return {
      platform: platformStats[0] || {},
      today: todayStats[0] || {},
    };
  }

  async statsGetRanking(ctx: TcContext<{ period?: string }>) {
    const userId = ctx.meta.userId;
    if (!userId) throw new Error('未登录');

    const { period = 'monthly' } = ctx.params || {};
    const Stats = this._statsModel;
    const startDate = this._getStartDate(period);

    const ranking: any[] = await Stats.aggregate([
      { $match: { date: { $gte: startDate }, period } },
      {
        $group: {
          _id: '$salesId',
          totalJoins: { $sum: '$joins' },
          totalConversions: { $sum: '$conversions' },
          totalRevenue: { $sum: '$revenue' },
        } as any,
      },
      { $sort: { totalJoins: -1 } },
      { $limit: 100 },
    ]).exec();

    const userIds = ranking.map((r: any) => r._id);
    const users: any[] = await ctx.call('user.getUsers', { userIds });

    return ranking.map((rank: any, index: number) => ({
      rank: index + 1,
      ...rank,
      user: users.find((u: any) => String(u._id) === String(rank._id)),
    }));
  }

  async statsGetTrend(ctx: TcContext<{ salesId: string; period?: string }>) {
    const userId = ctx.meta.userId;
    if (!userId) throw new Error('未登录');

    const { salesId, period = 'daily' } = ctx.params;
    const Stats = this._statsModel;
    const startDate = this._getStartDate('monthly');

    const docs = await Stats.find({
      salesId,
      date: { $gte: startDate },
      period: period as 'daily' | 'weekly' | 'monthly',
    })
      .sort('date')
      .exec();

    return await this.transformDocuments(ctx, {}, docs);
  }

  // ============================================================
  // 管理员操作
  // ============================================================

  async adminGetUserList(ctx: TcContext) {
    const userId = ctx.meta.userId;
    if (!userId) throw new Error('未登录');

    const users: any[] = await ctx.call('user.getAllUsers');
    return users;
  }

  async adminUpdateUserRole(ctx: TcContext<{ userId: string; role: string }>) {
    const operatorId = ctx.meta.userId;
    if (!operatorId) throw new Error('未登录');

    const { userId, role } = ctx.params;
    const validRoles = ['sales', 'admin', 'super_admin'];
    if (!validRoles.includes(role)) throw new Error('无效的角色');

    await ctx.call('user.updateUser', {
      userId,
      updates: { role },
    });

    return { message: '角色更新成功' };
  }

  async adminDeleteUser(
    ctx: TcContext<{
      userId: string;
      type?: string;
      reason?: string;
    }>
  ) {
    const operatorId = ctx.meta.userId;
    if (!operatorId) throw new Error('未登录');

    const { userId, type = 'soft', reason } = ctx.params;
    const user: any = await call(ctx).getUserInfo(userId);
    if (!user) throw new Error('用户不存在');

    if (type === 'hard') {
      await ctx.call('user.deleteUser', { userId });
    } else {
      await ctx.call('user.updateUser', {
        userId,
        updates: { status: 'deleted' },
      });
    }

    const DeletionRecord = this._deletionRecordModel;
    await DeletionRecord.create({
      userId,
      username: user.username,
      deletedBy: operatorId,
      type,
      reason: reason || '无',
    });

    return { message: '删除成功' };
  }

  async adminGetGroupList(ctx: TcContext) {
    const userId = ctx.meta.userId;
    if (!userId) throw new Error('未登录');

    const groups: any[] = await ctx.call('group.getAllGroups');

    const allStats: any[] = await this.adapter.model
      .aggregate([
        {
          $group: {
            _id: '$groupId',
            totalInvites: { $sum: 1 },
            totalJoins: { $sum: '$joinCount' },
          } as any,
        },
      ])
      .exec();

    const statsMap = new Map(allStats.map((s: any) => [String(s._id), s]));

    return groups.map((group: any) => ({
      ...group,
      stats: statsMap.get(String(group._id)) || {
        totalInvites: 0,
        totalJoins: 0,
      },
    }));
  }

  async adminGetGroupStats(ctx: TcContext<{ groupId: string }>) {
    const userId = ctx.meta.userId;
    if (!userId) throw new Error('未登录');

    const { groupId } = ctx.params;

    const stats: any[] = await this.adapter.model
      .aggregate([
        { $match: { groupId } },
        {
          $group: {
            _id: null,
            totalInvites: { $sum: 1 },
            totalClicks: { $sum: '$clickCount' },
            totalScans: { $sum: '$scanCount' },
            totalJoins: { $sum: '$joinCount' },
          } as any,
        },
      ])
      .exec();

    const AccessLog = this._accessLogModel;

    const groupInviteCodes = await this.adapter.model
      .find({ groupId })
      .select('code -_id')
      .exec();
    const codes = groupInviteCodes.map((inv: any) => inv.code);

    const recentJoins =
      codes.length > 0
        ? await AccessLog.find({
            inviteCode: { $in: codes },
            accessType: 'join',
          })
            .sort('-timestamp')
            .limit(20)
            .exec()
        : [];

    return {
      stats: stats[0] || {
        totalInvites: 0,
        totalClicks: 0,
        totalScans: 0,
        totalJoins: 0,
      },
      recentJoins: recentJoins.map((l: any) => l.toObject()),
    };
  }

  async adminKickUser(
    ctx: TcContext<{
      groupId: string;
      userId: string;
      reason?: string;
    }>
  ) {
    const operatorId = ctx.meta.userId;
    if (!operatorId) throw new Error('未登录');

    const { groupId, userId, reason } = ctx.params;

    const group = await call(ctx).getGroupInfo(groupId);
    if (!group) throw new Error('群组不存在');

    await ctx.call('group.kickMember', { groupId, userId });

    const KickRecord = this._kickRecordModel;
    await KickRecord.create({
      groupId,
      userId,
      kickedBy: operatorId,
      reason: reason || '无',
    });

    return { message: '踢出成功' };
  }

  // ============================================================
  // 工具方法
  // ============================================================

  private _getStartDate(period: string): Date {
    const now = new Date();
    switch (period) {
      case 'daily':
        return new Date(now.getTime() - 30 * 24 * 60 * 60 * 1000);
      case 'weekly':
        return new Date(now.getTime() - 90 * 24 * 60 * 60 * 1000);
      case 'monthly': {
        const d = new Date(now);
        d.setMonth(d.getMonth() - 12);
        return d;
      }
      default:
        return new Date(now.getTime() - 30 * 24 * 60 * 60 * 1000);
    }
  }
}

export default SalesChatService;