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

let mockState: any;

beforeEach(() => {
  window.localStorage.clear();

  const baseProjectConfig: ProjectConfig = {
    title: "멀티 선택 테스트",
    slug: "multi-select",
    canvasPreset: "full",
    canvasWidthPx: 1024,
    canvasBgColorHex: "#0f172a",
    bodyBgColorHex: "#020617",
  } as ProjectConfig;

  mockState = {
    blocks: [] as Block[],
    projectConfig: baseProjectConfig,
    selectedBlockId: null as string | null,
    selectedListItemId: null as string | null,
    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(),
  };
});

afterEach(() => {
  cleanup();
});

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>,
  };
});

function setupThreeBlocks() {
  const blocks: Block[] = [
    {
      id: "blk_1",
      type: "text",
      props: {
        text: "블록 1",
        align: "left",
        size: "base",
      },
    } as any,
    {
      id: "blk_2",
      type: "text",
      props: {
        text: "블록 2",
        align: "left",
        size: "base",
      },
    } as any,
    {
      id: "blk_3",
      type: "text",
      props: {
        text: "블록 3",
        align: "left",
        size: "base",
      },
    } as any,
  ];

  mockState.blocks = blocks;
  mockState.selectedBlockId = null;
}

describe("EditorPage - 멀티 선택", () => {
  it("Cmd/Ctrl+클릭으로 여러 블록을 동시에 선택할 수 있어야 한다", () => {
    setupThreeBlocks();

    render(<EditorPage />);

    const blocksEls = screen.getAllByTestId("editor-block") as HTMLElement[];

    // 첫 번째와 두 번째 블록을 Cmd/Ctrl+클릭
    fireEvent.click(blocksEls[0], { metaKey: true });
    fireEvent.click(blocksEls[1], { metaKey: true });

    const selectedEls = blocksEls.filter((el) => el.dataset.selected === "true");
    expect(selectedEls.length).toBe(2);
    const selectedIds = selectedEls.map((el) => el.getAttribute("data-block-id") ?? "");
    expect(new Set(selectedIds)).toEqual(new Set(["blk_1", "blk_2"]));
  });

  it("멀티 선택 상태에서 Backspace 로 선택된 모든 블록이 삭제되어야 한다", () => {
    setupThreeBlocks();

    render(<EditorPage />);

    const blocksEls = screen.getAllByTestId("editor-block") as HTMLElement[];

    // 블록 1, 2 를 멀티 선택
    fireEvent.click(blocksEls[0], { metaKey: true });
    fireEvent.click(blocksEls[1], { metaKey: true });

    // Backspace 로 삭제
    const event = new KeyboardEvent("keydown", { key: "Backspace" });
    window.dispatchEvent(event);

    // replaceBlocks 가 한 번 호출되고, 남은 블록은 blk_3 만 있어야 한다.
    expect(mockState.replaceBlocks).toHaveBeenCalledTimes(1);
    const arg = mockState.replaceBlocks.mock.calls[0][0] as Block[];
    expect(arg.length).toBe(1);
    expect(arg[0].id).toBe("blk_3");
  });
});
