import { Controller, Get, Post, Delete, Body, Param, Query, UseGuards } from '@nestjs/common';
import { ApiTags, ApiBearerAuth, ApiOperation } from '@nestjs/swagger';
import { PrismaService } from '../../infrastructure/database/prisma.service';
import { enrichWithNames } from '../../common/helpers/name-resolver';
import { AdminAuthGuard } from '../../common/guards/admin-auth.guard';
import { AdminRolesGuard } from '../../common/guards/admin-roles.guard';
import { AdminRoles } from '../../common/decorators/admin-roles.decorator';
import type { AdminRole } from '../../common/types/admin-role.enum';

@ApiTags('admin-users')
@Controller('admin-api/users')
@UseGuards(AdminAuthGuard, AdminRolesGuard)
@ApiBearerAuth()
export class AdminUsersMgmtController {
  constructor(private readonly prisma: PrismaService) {}

  // ── User List ──

  @Get()
  @AdminRoles('ADMIN' as AdminRole)
  @ApiOperation({ summary: 'C 端用户列表' })
  async listUsers(@Query('search') search?: string, @Query('page') page?: string, @Query('limit') limit?: string) {
    const take = Math.min(Number(limit) || 20, 100);
    const skip = (Math.max(Number(page) || 1, 1) - 1) * take;
    const where: any = { deletedAt: null };
    if (search) where.OR = [{ email: { contains: search } }, { nickname: { contains: search } }];
    const [items, total] = await Promise.all([
      this.prisma.user.findMany({ where, orderBy: { createdAt: 'desc' }, take, skip, select: { id: true, email: true, nickname: true, role: true, status: true, lastLoginAt: true, createdAt: true } }),
      this.prisma.user.count({ where }),
    ]);
    const enriched = await enrichWithNames(this.prisma, items); return { items: enriched, total  };
  }

  // ── Membership ──

  @Get('memberships')
  @AdminRoles('ADMIN' as AdminRole)
  @ApiOperation({ summary: '用户会员列表' })
  async memberships(@Query('userId') userId?: string) {
    return this.prisma.userMembership.findMany({
      where: userId ? { userId } : undefined,
      include: { plan: true },
      orderBy: { createdAt: 'desc' },
      take: 100,
    });
  }

  @Post('memberships')
  @AdminRoles('SUPER_ADMIN' as AdminRole)
  @ApiOperation({ summary: '手动分配会员' })
  async addMembership(@Body() d: { userId: string; planId: string; expiresAt?: string }) {
    return this.prisma.userMembership.create({
      data: { userId: d.userId, planId: d.planId, expiresAt: d.expiresAt ? new Date(d.expiresAt) : null },
    });
  }

  // ── Deletion Requests ──

  @Get('deletion-requests')
  @AdminRoles('ADMIN' as AdminRole)
  @ApiOperation({ summary: '注销申请列表' })
  async deletionRequests(@Query('status') status?: string) {
    return this.prisma.accountDeletionRequest.findMany({
      where: status ? { status } : undefined,
      orderBy: { createdAt: 'desc' },
      take: 100,
    });
  }

  @Post('deletion-requests/:id/approve')
  @AdminRoles('SUPER_ADMIN' as AdminRole)
  @ApiOperation({ summary: '批准注销（立即执行）' })
  async approveDeletion(@Param('id') id: string) {
    return this.prisma.accountDeletionRequest.update({
      where: { id },
      data: { status: 'completed', reviewedAt: new Date(), completedAt: new Date() },
    });
  }

  @Post('deletion-requests/:id/reject')
  @AdminRoles('SUPER_ADMIN' as AdminRole)
  @ApiOperation({ summary: '驳回注销' })
  async rejectDeletion(@Param('id') id: string) {
    return this.prisma.accountDeletionRequest.update({
      where: { id },
      data: { status: 'cancelled', reviewedAt: new Date(), cancelledAt: new Date() },
    });
  }

  // ── Devices ──

  @Get(':userId/devices')
  @AdminRoles('ADMIN' as AdminRole)
  @ApiOperation({ summary: '查看用户设备' })
  async userDevices(@Param('userId') userId: string) {
    return this.prisma.userDevice.findMany({ where: { userId }, orderBy: { lastSeenAt: 'desc' } });
  }
}