import { Test } from '@nestjs/testing';
import { NotFoundException } from '@nestjs/common';
import { PublicService } from './public.service';
import { PrismaService } from '../prisma/prisma.service';

describe('PublicService', () => {
  let service: PublicService;
  let prisma: PrismaService;
  const stamp = Date.now();
  let countryId: bigint;
  let categoryId: bigint;
  let childCategoryId: bigint;
  let otherCategoryId: bigint;
  let tagId: bigint;
  let originGoodId: bigint;
  let goodIds: bigint[] = [];

  beforeAll(async () => {
    const moduleRef = await Test.createTestingModule({
      providers: [PublicService, PrismaService],
    }).compile();
    service = moduleRef.get(PublicService);
    prisma = moduleRef.get(PrismaService);
    await prisma.onModuleInit();

    const country = await prisma.country.create({
      data: { countryName: `Pub Country ${stamp}` },
    });
    countryId = country.id;

    const cat = await prisma.category.create({
      data: { categoryName: `Pub Cat ${stamp}` },
    });
    categoryId = cat.id;
    const child = await prisma.category.create({
      data: { categoryName: `Pub Child ${stamp}`, parentCategoryId: cat.id },
    });
    childCategoryId = child.id;
    const otherCat = await prisma.category.create({
      data: { categoryName: `Pub Other ${stamp}` },
    });
    otherCategoryId = otherCat.id;

    const tag = await prisma.tag.create({
      data: { tagName: `Pub Tag ${stamp}`, tagColor: '#0000FF' },
    });
    tagId = tag.id;

    const og = await prisma.originGood.create({
      data: {
        sdsGoodId: `pub-sds-${stamp}`,
        goodName: `Origin ${stamp}`,
        goodImage: 'http://img',
      },
    });
    originGoodId = og.id;

    // Seed 3 goods:
    //   high priority + position.indexVal=1
    //   mid  priority + position.indexVal=5
    //   no  priority + no position (falls back to createdAt)
    const pos1 = await prisma.position.create({
      data: { indexVal: 1, countryId, categoryId },
    });
    const pos2 = await prisma.position.create({
      data: { indexVal: 5, countryId, categoryId },
    });

    const g1 = await prisma.good.create({
      data: {
        goodName: `Pub High ${stamp}`,
        originGoodId,
        countryId,
        categoryId,
        goodPriority: 10,
        positionId: pos1.id,
      },
    });
    const g2 = await prisma.good.create({
      data: {
        goodName: `Pub Mid ${stamp}`,
        originGoodId,
        countryId,
        categoryId,
        goodPriority: 5,
        positionId: pos2.id,
      },
    });
    const g3 = await prisma.good.create({
      data: {
        goodName: `Pub NoPos ${stamp}`,
        originGoodId,
        countryId,
        categoryId,
        tagId,
        goodPriority: 1,
      },
    });
    goodIds = [g1.id, g2.id, g3.id];

    // Seed a good in `otherCategory` so the "onlyHaveGoods" filter
    // returns more than one category.
    await prisma.good.create({
      data: {
        goodName: `Pub Other ${stamp}`,
        originGoodId,
        countryId,
        categoryId: otherCategoryId,
        goodPriority: 1,
      },
    });

    // And seed a good in the *child* category, to verify categoryId
    // recursion.
    await prisma.good.create({
      data: {
        goodName: `Pub ChildGood ${stamp}`,
        originGoodId,
        countryId,
        categoryId: childCategoryId,
        goodPriority: 0,
      },
    });
  });

  afterAll(async () => {
    if (goodIds.length) {
      await prisma.good.deleteMany({ where: { id: { in: goodIds } } });
    }
    await prisma.good.deleteMany({
      where: { goodName: { contains: `Pub ` } },
    });
    await prisma.position.deleteMany({
      where: { countryId },
    });
    await prisma.tag.delete({ where: { id: tagId } });
    await prisma.originGood.delete({ where: { id: originGoodId } });
    // Delete children before parent (FK self-relation is RESTRICT).
    await prisma.category.delete({ where: { id: childCategoryId } });
    await prisma.category.delete({ where: { id: otherCategoryId } });
    await prisma.category.delete({ where: { id: categoryId } });
    await prisma.country.delete({ where: { id: countryId } });
    await prisma.onModuleDestroy();
  });

  it('should be defined', () => {
    expect(service).toBeDefined();
  });

  it('getCategoriesTree returns only categories that have goods', async () => {
    const tree = await service.getCategoriesTree();
    const allIds = new Set<string>();
    const walk = (list: Array<{ id: string; children: Array<{ id: string }> }>) => {
      for (const n of list) {
        allIds.add(n.id);
        walk(n.children as any);
      }
    };
    walk(tree as any);
    // We seeded goods in `categoryId`, `childCategoryId`, `otherCategoryId`.
    expect(allIds.has(categoryId.toString())).toBe(true);
    expect(allIds.has(childCategoryId.toString())).toBe(true);
    expect(allIds.has(otherCategoryId.toString())).toBe(true);
  });

  it('getCountries returns only countries that have goods', async () => {
    const countries = await service.getCountries();
    expect(countries.find((c) => c.id === countryId.toString())).toBeDefined();
  });

  it('filters by countryId, tagId, keyword and categoryId (recursively)', async () => {
    const filtered = await service.getGoods({
      page: 1,
      pageSize: 50,
      countryId: Number(countryId),
      categoryId: Number(categoryId), // includes child
      keyword: `Pub `,
    });
    expect(filtered.total).toBeGreaterThanOrEqual(4); // High, Mid, NoPos, ChildGood
    expect(filtered.items.every((g) => g.country.id === countryId.toString())).toBe(true);
  });

  it('sorts by priority DESC, position.indexVal ASC, createdAt DESC', async () => {
    const result = await service.getGoods({
      page: 1,
      pageSize: 50,
      countryId: Number(countryId),
      keyword: `Pub `,
    });
    const priorities = result.items.map((g) => g.goodPriority);
    // First verify primary descending priority.
    const sorted = [...priorities].sort((a, b) => b - a);
    expect(priorities).toEqual(sorted);
  });

  it('getGood returns detail and 404 for unknown id', async () => {
    const first = await service.getGoods({
      page: 1,
      pageSize: 1,
      countryId: Number(countryId),
      keyword: `Pub `,
    });
    expect(first.items.length).toBe(1);
    const detail = await service.getGood(BigInt(first.items[0].id));
    expect(detail.id).toBe(first.items[0].id);

    await expect(service.getGood(BigInt(99999999))).rejects.toBeInstanceOf(
      NotFoundException,
    );
  });

  it('getTags returns tags with their group info, sorted by group then order', async () => {
    const tags = await service.getTags();
    expect(tags.length).toBeGreaterThan(0);
    // Each tag in our seed (包邮/不包邮/...) should have a group
    const grouped = tags.find((t) => t.tagName === '包邮');
    if (grouped) {
      expect(grouped.group).not.toBeNull();
      expect(grouped.group!.groupName).toBe('物流渠道');
    }
  });

  it('getTagGroups returns only groups that have goods', async () => {
    const groups = await service.getTagGroups();
    expect(groups.length).toBeGreaterThan(0);
    const names = groups.map((g) => g.groupName);
    expect(names).toContain('物流渠道');
    expect(names).toContain('印刷位置');
    expect(names).toContain('印刷工艺');
    // Sorted by sortOrder
    const sortOrders = groups.map((g) => g.sortOrder);
    expect([...sortOrders].sort((a, b) => a - b)).toEqual(sortOrders);
  });
});