import { describe, it, expect, beforeEach, afterEach, vi } from "vitest";
import { render, cleanup } from "@testing-library/react";
import EditorPage from "@/app/editor/page";
import type { Block, ProjectConfig } from "@/features/editor/state/editorStore";

// EditorPage 자동저장 TDD
// - blocks + projectConfig 를 localStorage 의 pb:autosave:<slug> 키로 자동 저장해야 한다.
// - localStorage 에 autosave 스냅샷이 있으면 초기 렌더에서 replaceBlocks + updateProjectConfig 로 복원해야 한다.

let mockState: any;

beforeEach(() => {
  const baseProjectConfig: ProjectConfig = {
    title: "자동저장 테스트 페이지",
    slug: "autosave-test",
    canvasPreset: "full",
  } as ProjectConfig;

  mockState = {
    blocks: [
      {
        id: "blk_1",
        type: "text",
        props: {
          text: "자동저장 테스트 블록",
          align: "left",
          size: "base",
        },
      },
    ] as Block[],
    projectConfig: baseProjectConfig,
    selectedBlockId: null as string | null,
    selectedListItemId: null as string | null,
    // EditorPage 가 참조하는 액션들: 기본적으로 no-op mock 으로 채운다.
    undo: vi.fn(),
    redo: vi.fn(),
    removeBlock: vi.fn(),
    duplicateBlock: vi.fn(),
    selectBlock: vi.fn(),
    selectListItem: vi.fn(),
    replaceBlocks: vi.fn(),
    reorderBlocks: vi.fn(),
    moveBlock: vi.fn(),
    addTextBlock: vi.fn(),
    addButtonBlock: vi.fn(),
    addImageBlock: vi.fn(),
    addDividerBlock: vi.fn(),
    addListBlock: vi.fn(),
    addSectionBlock: vi.fn(),
    addFormBlock: vi.fn(),
    addFormInputBlock: vi.fn(),
    addFormSelectBlock: vi.fn(),
    addFormCheckboxBlock: vi.fn(),
    addFormRadioBlock: vi.fn(),
    addHeroTemplateSection: vi.fn(),
    addFeaturesTemplateSection: vi.fn(),
    addCtaTemplateSection: vi.fn(),
    addFaqTemplateSection: vi.fn(),
    addPricingTemplateSection: vi.fn(),
    addTestimonialsTemplateSection: vi.fn(),
    addBlogTemplateSection: vi.fn(),
    addTeamTemplateSection: vi.fn(),
    addFooterTemplateSection: vi.fn(),
    updateBlock: vi.fn(),
    updateProjectConfig: vi.fn(),
  };
});

afterEach(() => {
  cleanup();
  vi.restoreAllMocks();
});

vi.mock("@/features/editor/state/editorStore", () => {
  const useEditorStore = (selector: (state: any) => any) => selector(mockState);
  (useEditorStore as any).getState = () => mockState;

  return {
    __esModule: true,
    useEditorStore,
  };
});

vi.mock("next/link", () => {
  return {
    __esModule: true,
    default: ({ href, children }: any) => <a href={href}>{children}</a>,
  };
});

describe("EditorPage - 자동저장", () => {
  it("blocks 와 projectConfig 를 localStorage 의 pb:autosave:<slug> 키로 자동 저장해야 한다", () => {
    const storageProto = Object.getPrototypeOf(window.localStorage);
    const setItemSpy = vi.spyOn(storageProto, "setItem");

    render(<EditorPage />);

    expect(setItemSpy).toHaveBeenCalled();
    const [key, value] = setItemSpy.mock.calls[0] as [string, string];
    expect(key).toBe("pb:autosave:autosave-test");

    const parsed = JSON.parse(value);
    expect(Array.isArray(parsed.blocks)).toBe(true);
    expect(parsed.blocks[0].id).toBe("blk_1");
    expect(parsed.projectConfig.slug).toBe("autosave-test");
  });

  it("localStorage 에 autosave 스냅샷이 있으면 초기 렌더에서 replaceBlocks 와 updateProjectConfig 로 복원해야 한다", () => {
    const savedBlocks: Block[] = [
      {
        id: "saved_1",
        type: "text",
        props: {
          text: "저장된 블록",
          align: "left",
          size: "base",
        },
      } as any,
    ];

    const savedConfig: ProjectConfig = {
      title: "저장된 프로젝트",
      slug: "autosave-test",
      canvasPreset: "full",
    } as ProjectConfig;

    const payload = {
      blocks: savedBlocks,
      projectConfig: savedConfig,
    };

    window.localStorage.setItem("pb:autosave:autosave-test", JSON.stringify(payload));

    render(<EditorPage />);

    expect(mockState.replaceBlocks).toHaveBeenCalledTimes(1);
    expect(mockState.replaceBlocks).toHaveBeenCalledWith(savedBlocks);

    expect(mockState.updateProjectConfig).toHaveBeenCalledTimes(1);
    expect(mockState.updateProjectConfig).toHaveBeenCalledWith(savedConfig);
  });
});