import { Controller, Get, Param, Delete, Query, UseGuards } from '@nestjs/common';
import { ApiTags, ApiBearerAuth, ApiOperation } from '@nestjs/swagger';
import { PrismaService } from '../../infrastructure/database/prisma.service';
import { AdminAuthGuard } from '../../common/guards/admin-auth.guard';
import { AdminRolesGuard } from '../../common/guards/admin-roles.guard';

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

  @Get()
  @ApiOperation({ summary: '知识库列表（管理员）' })
  async list(@Query('page') page = '1', @Query('limit') limit = '20') {
    const p = parseInt(page), l = parseInt(limit);
    const [items, total] = await Promise.all([
      this.prisma.knowledgeBase.findMany({
        where: { deletedAt: null },
        orderBy: { updatedAt: 'desc' },
        skip: (p - 1) * l, take: l,
        include: { user: { select: { nickname: true, email: true } } },
      }),
      this.prisma.knowledgeBase.count({ where: { deletedAt: null } }),
    ]);
    return { items, total, page: p, limit: l, totalPages: Math.ceil(total / l) };
  }

  @Get(':id')
  @ApiOperation({ summary: '知识库详情' })
  async detail(@Param('id') id: string) {
    const kb = await this.prisma.knowledgeBase.findUnique({
      where: { id },
      include: {
        user: { select: { nickname: true, email: true } },
        sources: { where: { deletedAt: null }, take: 20 },
        _count: { select: { items: true } },
      },
    });
    return kb;
  }

  @Delete(':id')
  @ApiOperation({ summary: '删除知识库' })
  async remove(@Param('id') id: string) {
    await this.prisma.knowledgeBase.update({ where: { id }, data: { deletedAt: new Date() } });
    return { success: true };
  }
}