import { beforeEach, describe, expect, test, vi } from "vitest";

const getAllKnowledgeBaseArticlesMock = vi.fn();
const createKnowledgeBaseArticleMock = vi.fn();
const getAllKnowledgeBaseCategoriesMock = vi.fn();
const getFixedTMock = vi.fn();
const knowledgeBaseArticleCountMock = vi.fn();
const knowledgeBaseCategoryCountMock = vi.fn();
const knowledgeBaseDeleteMock = vi.fn();
const cachifiedMock = vi.fn();

vi.mock("../db/kbArticles.db.server", () => ({
  createKnowledgeBaseArticle: (...args: unknown[]) => createKnowledgeBaseArticleMock(...args),
  getAllKnowledgeBaseArticles: (...args: unknown[]) => getAllKnowledgeBaseArticlesMock(...args),
  getFeaturedKnowledgeBaseArticles: vi.fn(),
  getKbArticleById: vi.fn(),
  getKbArticleByIdInKnowledgeBase: vi.fn(),
  getKbArticleBySlug: vi.fn(),
}));

vi.mock("../db/kbCategories.db.server", () => ({
  createKnowledgeBaseCategory: vi.fn(),
  getAllKnowledgeBaseCategories: (...args: unknown[]) => getAllKnowledgeBaseCategoriesMock(...args),
  getKbCategoryById: vi.fn(),
  getKbCategoryBySlug: vi.fn(),
}));

vi.mock("../db/knowledgeBase.db.server", () => ({
  getAllKnowledgeBases: vi.fn(),
  getKnowledgeBaseById: vi.fn(),
  getKnowledgeBaseBySlug: vi.fn(),
}));

vi.mock("../services/kbArticleSearch.server", () => ({
  searchKnowledgeBaseArticles: vi.fn(),
}));

vi.mock("~/locale/i18next.server", () => ({
  remixI18Next: {
    getFixedT: (...args: unknown[]) => getFixedTMock(...args),
  },
}));

vi.mock("~/utils/cache.server", () => ({
  cachified: (...args: unknown[]) => cachifiedMock(...args),
}));

vi.mock("~/utils/db.server", () => ({
  db: {
    knowledgeBaseArticle: { count: (...args: unknown[]) => knowledgeBaseArticleCountMock(...args) },
    knowledgeBaseCategory: { count: (...args: unknown[]) => knowledgeBaseCategoryCountMock(...args) },
    knowledgeBase: { delete: (...args: unknown[]) => knowledgeBaseDeleteMock(...args) },
  },
}));

describe("KnowledgeBaseServiceServer", () => {
  beforeEach(() => {
    vi.clearAllMocks();
    getAllKnowledgeBaseArticlesMock.mockResolvedValue([
      {
        id: "article-1",
        slug: "untitled",
        order: 1,
      },
    ]);
    getAllKnowledgeBaseCategoriesMock.mockResolvedValue([]);
    createKnowledgeBaseArticleMock.mockImplementation(async (input) => ({ id: "created", ...input }));
    getFixedTMock.mockImplementation(async (locale: string) => (key: string, vars?: Record<string, unknown>) => `${locale}:${key}:${vars?.number ?? ""}`);
    knowledgeBaseArticleCountMock.mockResolvedValue(0);
    knowledgeBaseCategoryCountMock.mockResolvedValue(0);
    knowledgeBaseDeleteMock.mockResolvedValue({ id: "kb-1" });
    cachifiedMock.mockImplementation(async ({ getFreshValue }: { getFreshValue: () => unknown }) => getFreshValue());
  });

  test("newArticle localizes generated untitled titles and persists the resolved language", async () => {
    const KnowledgeBaseServiceServer = (await import("./KnowledgeBaseService.server")).default;

    const created = await KnowledgeBaseServiceServer.newArticle({
      kb: {
        id: "kb-1",
        slug: "docs",
        defaultLanguage: "de",
      } as never,
      params: {},
      userId: "user-1",
      position: "last",
    });

    expect(getFixedTMock).toHaveBeenCalledWith("de", "translations");
    expect(createKnowledgeBaseArticleMock).toHaveBeenCalledWith(expect.objectContaining({ title: "de:knowledgeBase.adminCategories.untitledNumbered:1", language: "de" }));
    expect(created).toMatchObject({ title: "de:knowledgeBase.adminCategories.untitledNumbered:1", language: "de" });
  });

  test("del exposes coded delete guard errors for localized route handling", async () => {
    const { default: KnowledgeBaseServiceServer, getKnowledgeBaseActionErrorKey } = await import("./KnowledgeBaseService.server");
    knowledgeBaseArticleCountMock.mockResolvedValueOnce(1);

    try {
      await KnowledgeBaseServiceServer.del({ id: "kb-1" } as never);
      throw new Error("Expected delete to reject");
    } catch (error) {
      expect(error).toMatchObject({ code: "cannot-delete-with-articles" });
      expect(getKnowledgeBaseActionErrorKey(error)).toBe("knowledgeBase.admin.errors.cannotDeleteWithArticles");
    }
  });

  test("duplicate and new article validation errors map to semantic i18n keys", async () => {
    const { default: KnowledgeBaseServiceServer, getKnowledgeBaseActionErrorKey } = await import("./KnowledgeBaseService.server");

    await expect(
      KnowledgeBaseServiceServer.duplicateArticle({ kb: { id: "kb-1", slug: "docs", defaultLanguage: "en" } as never, language: "en", articleId: "missing" })
    ).rejects.toMatchObject({ code: "invalid-article" });

    try {
      await KnowledgeBaseServiceServer.newArticle({
        kb: { id: "kb-1", slug: "docs", defaultLanguage: "en" } as never,
        params: {},
        userId: "user-1",
        position: "last",
        categoryId: "missing",
      });
    } catch (error) {
      expect(getKnowledgeBaseActionErrorKey(error)).toBe("knowledgeBase.adminCategories.errors.categoryNotFound");
    }
  });

  test("public lookup errors map to public i18n keys", async () => {
    const { default: KnowledgeBaseServiceServer, getKnowledgeBasePublicErrorKey } = await import("./KnowledgeBaseService.server");
    cachifiedMock.mockResolvedValueOnce(null);

    try {
      await KnowledgeBaseServiceServer.get({ slug: "missing", enabled: true, request: new Request("https://example.com/help") });
      throw new Error("Expected lookup to reject");
    } catch (error) {
      expect(error).toMatchObject({ code: "not-found" });
      expect(getKnowledgeBasePublicErrorKey(error)).toBe("knowledgeBase.public.errors.notFound");
    }

    cachifiedMock.mockResolvedValueOnce({ title: "Draft docs", enabled: false });
    try {
      await KnowledgeBaseServiceServer.get({ slug: "draft", enabled: true, request: new Request("https://example.com/help") });
      throw new Error("Expected disabled knowledge base to reject");
    } catch (error) {
      expect(error).toMatchObject({ code: "disabled" });
      expect(getKnowledgeBasePublicErrorKey(error)).toBe("knowledgeBase.public.errors.disabled");
    }
  });
});