backend/src/cms/cms.service.ts

import { Injectable, NotFoundException } from '@nestjs/common';
import { PrismaService } from '../prisma/prisma.service';
import { CreateCmsContentDto, UpdateCmsContentDto } from './dto';

@Injectable()
export class CmsService {
  constructor(private prisma: PrismaService) {}

  async findByPage(pageSlug: string) {
    return this.prisma.cmsContent.findMany({
      where: { pageSlug, isPublished: true },
      orderBy: { sectionKey: 'asc' },
    });
  }

  async findByPageAndSection(pageSlug: string, sectionKey: string) {
    const content = await this.prisma.cmsContent.findUnique({
      where: { pageSlug_sectionKey: { pageSlug, sectionKey } },
    });
    if (!content) {
      throw new NotFoundException(`CMS content not found for ${pageSlug}/${sectionKey}`);
    }
    return content;
  }

  async upsert(dto: CreateCmsContentDto) {
    return this.prisma.cmsContent.upsert({
      where: {
        pageSlug_sectionKey: {
          pageSlug: dto.pageSlug,
          sectionKey: dto.sectionKey,
        },
      },
      update: {
        content: dto.content,
        isPublished: dto.isPublished ?? true,
      },
      create: {
        pageSlug: dto.pageSlug,
        sectionKey: dto.sectionKey,
        content: dto.content,
        isPublished: dto.isPublished ?? true,
      },
    });
  }

  async update(id: string, dto: UpdateCmsContentDto) {
    const existing = await this.prisma.cmsContent.findUnique({ where: { id } });
    if (!existing) {
      throw new NotFoundException(`CMS content with ID ${id} not found`);
    }
    return this.prisma.cmsContent.update({
      where: { id },
      data: dto,
    });
  }

  async remove(id: string) {
    const existing = await this.prisma.cmsContent.findUnique({ where: { id } });
    if (!existing) {
      throw new NotFoundException(`CMS content with ID ${id} not found`);
    }
    return this.prisma.cmsContent.delete({ where: { id } });
  }
}