// @vitest-environment jsdom

import { cleanup, fireEvent, render, screen } from '@testing-library/react';
import { afterEach, describe, expect, it, vi } from 'vitest';

import type { Node as UiNode } from '../src/features/ui-editor/types/Node';
import type { UITree } from '../src/features/ui-editor/types/UITree';
import { ExclusiveChildrenTabs } from '../src/view/ui-editor/components/preview/ExclusiveChildrenTabs';
import { UiTreeRenderer } from '../src/view/ui-editor/components/preview/UiTreeRenderer';
import { UiNodeContextMenu } from '../src/view/ui-editor/components/UiNodeContextMenu';

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

function node(id: string, children: UiNode[] = []): UiNode {
  return {
    id,
    layout: {
      transform: {
        anchor_min: [0, 0],
        anchor_max: [1, 1],
        offset_min: [0, 0],
        offset_max: [0, 0],
      },
      custom_minimum_size: [0, 0],
      size_flags_horizontal: 1,
      size_flags_vertical: 1,
      size_flags_stretch_ratio: 1,
      container: 'None',
    },
    metadata: {
      name: id,
      description: '',
      layout_status: 'NoProblem',
      component_status: 'NoProblem',
      allow_llm_edit_layout: true,
      allow_llm_edit_component: true,
      source: 'System',
    },
    component: null,
    children_display_mode: 'Stack',
    children,
  };
}

function exclusiveNode(id: string, children: UiNode[]): UiNode {
  return { ...node(id, children), children_display_mode: 'Exclusive' };
}

const tree: UITree = {
  src_ui_design: 'page',
  root: node('root', [node('child', [node('grandchild')])]),
};

const resources = {
  previewUrls: {},
  sprites: {},
  fonts: {},
  fontFaces: {},
};

function renderTree(
  renderMode: 'editor-overlay' | 'final-preview',
  hiddenNodeIds: ReadonlySet<string>,
  options: {
    showFrame?: boolean;
    selectedNodeId?: string | null;
    onSelectNode?: ReturnType<typeof vi.fn>;
    onNodeContextMenu?: ReturnType<typeof vi.fn>;
  } = {},
) {
  return render(
    <UiTreeRenderer
      tree={tree}
      renderMode={renderMode}
      showFrame={options.showFrame ?? false}
      hiddenNodeIds={hiddenNodeIds}
      selectedNodeId={options.selectedNodeId ?? null}
      resources={resources}
      onSelectNode={options.onSelectNode ?? vi.fn()}
      onNodeContextMenu={options.onNodeContextMenu ?? vi.fn()}
      onNodePointerDown={vi.fn()}
      onNodePointerMove={vi.fn()}
      onNodePointerUp={vi.fn()}
      onNodePointerCancel={vi.fn()}
      onNodeResizePointerDown={vi.fn()}
      onNodeResizePointerMove={vi.fn()}
      onNodeResizePointerUp={vi.fn()}
      onNodeResizePointerCancel={vi.fn()}
      viewportScale={1}
    />,
  );
}

describe('UI tree preview visibility', () => {
  it('disables native text selection on preview node layers', () => {
    const rendered = renderTree('editor-overlay', new Set());

    expect(
      rendered.container
        .querySelector('[data-node-id="child"]')
        ?.classList.contains('select-none'),
    ).toBe(true);
  });

  it('does not use click alone to select directly draggable nodes', () => {
    const onSelectNode = vi.fn();
    const rendered = renderTree('editor-overlay', new Set(), { onSelectNode });
    fireEvent.click(
      rendered.container.querySelector('[data-node-id="child"]')!,
    );
    expect(onSelectNode).not.toHaveBeenCalled();
  });

  it('shares node menu restrictions, disabled actions, and dismissal behavior', () => {
    const onClose = vi.fn();
    const onInsertChild = vi.fn();
    const onInsertSibling = vi.fn();
    const onDelete = vi.fn();
    render(
      <UiNodeContextMenu
        nodeId="page-root"
        position={{ x: window.innerWidth, y: window.innerHeight }}
        isPageRoot
        disabled
        onClose={onClose}
        onInsertChild={onInsertChild}
        onInsertSibling={onInsertSibling}
        onDelete={onDelete}
      />,
    );

    const menu = screen.getByRole('menu') as HTMLDivElement;
    expect(menu.style.left).toBe(`${window.innerWidth - 184}px`);
    expect(menu.style.top).toBe(`${window.innerHeight - 56}px`);
    expect(
      (
        screen.getByRole('menuitem', {
          name: '新增子节点',
        }) as HTMLButtonElement
      ).disabled,
    ).toBe(true);
    expect(screen.queryByRole('menuitem', { name: '新增同级节点' })).toBeNull();
    expect(
      screen.queryByRole('menuitem', { name: '删除节点及子节点' }),
    ).toBeNull();
    fireEvent.click(screen.getByRole('menuitem', { name: '新增子节点' }));
    expect(onInsertChild).not.toHaveBeenCalled();
    expect(onClose).not.toHaveBeenCalled();
    fireEvent.keyDown(window, { key: 'Escape' });
    expect(onClose).toHaveBeenCalledTimes(1);
  });

  it('maps a Godot HBoxContainer to preview CSS and disables child free-transform handles', () => {
    const hboxTree: UITree = {
      src_ui_design: 'page',
      root: {
        ...node('root', [node('first'), node('second')]),
        layout: {
          ...node('root').layout,
          container: { HBox: { alignment: 'Begin', separation: 12 } },
        },
      },
    };
    const rendered = render(
      <UiTreeRenderer
        tree={hboxTree}
        renderMode="editor-overlay"
        showFrame
        hiddenNodeIds={new Set()}
        selectedNodeId="first"
        resources={resources}
        onSelectNode={vi.fn()}
        onNodeContextMenu={vi.fn()}
        onNodePointerDown={vi.fn()}
        onNodePointerMove={vi.fn()}
        onNodePointerUp={vi.fn()}
        onNodePointerCancel={vi.fn()}
        onNodeResizePointerDown={vi.fn()}
        onNodeResizePointerMove={vi.fn()}
        onNodeResizePointerUp={vi.fn()}
        onNodeResizePointerCancel={vi.fn()}
        viewportScale={1}
      />,
    );
    const root = rendered.container.querySelector(
      '[data-node-id="root"]',
    ) as HTMLDivElement;
    const first = rendered.container.querySelector(
      '[data-node-id="first"]',
    ) as HTMLDivElement;
    expect(root.style.display).toBe('flex');
    expect(root.style.flexDirection).toBe('row');
    expect(root.style.gap).toBe('12px');
    expect(first.style.position).toBe('relative');
    expect(screen.queryByLabelText('nw 调整控制点')).toBeNull();
  });

  it('shows final-preview node frames and resize handles only when requested', () => {
    const withoutFrames = renderTree('final-preview', new Set(), {
      selectedNodeId: 'child',
    });
    const plainChild = withoutFrames.container.querySelector(
      '[data-node-id="child"]',
    ) as HTMLDivElement;
    expect(plainChild.style.outline).toBe('');
    expect(screen.queryByLabelText('nw 调整控制点')).toBeNull();
    withoutFrames.unmount();

    const withFrames = renderTree('final-preview', new Set(), {
      showFrame: true,
      selectedNodeId: 'child',
    });
    const framedChild = withFrames.container.querySelector(
      '[data-node-id="child"]',
    ) as HTMLDivElement;
    expect(framedChild.style.outline).toBe('2px solid rgb(249 115 22)');
    expect(screen.getByText('child')).toBeTruthy();
    expect(screen.getAllByLabelText(/调整控制点$/)).toHaveLength(8);
  });

  it('hides a node subtree in editor overlay and final preview', () => {
    const editorOverlay = renderTree('editor-overlay', new Set(['child']));
    expect(
      editorOverlay.container.querySelector('[data-node-id="root"]'),
    ).toBeTruthy();
    expect(
      editorOverlay.container.querySelector('[data-node-id="child"]'),
    ).toBeNull();
    expect(
      editorOverlay.container.querySelector('[data-node-id="grandchild"]'),
    ).toBeNull();

    const finalPreview = renderTree('final-preview', new Set(['root']));
    expect(finalPreview.container.querySelector('[data-node-id]')).toBeNull();
  });

  it('renders only the first unhidden child for an exclusive parent', () => {
    const exclusiveTree: UITree = {
      src_ui_design: 'page',
      root: exclusiveNode('root', [node('child-a'), node('child-b')]),
    };
    const renderExclusive = (hiddenNodeIds: ReadonlySet<string>) =>
      render(
        <UiTreeRenderer
          tree={exclusiveTree}
          renderMode="final-preview"
          showFrame={false}
          hiddenNodeIds={hiddenNodeIds}
          selectedNodeId={null}
          resources={resources}
          onSelectNode={vi.fn()}
          onNodeContextMenu={vi.fn()}
          onNodePointerDown={vi.fn()}
          onNodePointerMove={vi.fn()}
          onNodePointerUp={vi.fn()}
          onNodePointerCancel={vi.fn()}
          onNodeResizePointerDown={vi.fn()}
          onNodeResizePointerMove={vi.fn()}
          onNodeResizePointerUp={vi.fn()}
          onNodeResizePointerCancel={vi.fn()}
          viewportScale={1}
        />,
      );

    const first = renderExclusive(new Set());
    expect(
      first.container.querySelector('[data-node-id="child-a"]'),
    ).toBeTruthy();
    expect(
      first.container.querySelector('[data-node-id="child-b"]'),
    ).toBeNull();
    first.unmount();

    const second = renderExclusive(new Set(['child-a']));
    expect(
      second.container.querySelector('[data-node-id="child-a"]'),
    ).toBeNull();
    expect(
      second.container.querySelector('[data-node-id="child-b"]'),
    ).toBeTruthy();
    second.unmount();

    const none = renderExclusive(new Set(['child-a', 'child-b']));
    expect(none.container.querySelector('[data-node-id="child-a"]')).toBeNull();
    expect(none.container.querySelector('[data-node-id="child-b"]')).toBeNull();
  });

  it('uses a highlighted tab bar for exclusive child switching', () => {
    const parent = exclusiveNode('parent', [node('child-a'), node('child-b')]);
    const onSelectChild = vi.fn();
    render(
      <ExclusiveChildrenTabs
        parent={parent}
        isChildVisible={(nodeId) => nodeId === 'child-a'}
        onSelectChild={onSelectChild}
      />,
    );

    expect(
      screen
        .getByRole('tab', { name: 'child-a' })
        .getAttribute('aria-selected'),
    ).toBe('true');
    expect(
      screen
        .getByRole('tab', { name: 'child-b' })
        .getAttribute('aria-selected'),
    ).toBe('false');
    fireEvent.click(screen.getByRole('tab', { name: 'child-b' }));
    expect(onSelectChild).toHaveBeenCalledWith('child-b');
  });

  it('keeps exclusive tab pointer gestures out of the parent node', () => {
    const onSelectChild = vi.fn();
    const onNodePointerDown = vi.fn();
    const parent = exclusiveNode('parent', [node('child-a'), node('child-b')]);
    render(
      <UiTreeRenderer
        tree={{ src_ui_design: 'page', root: node('root', [parent]) }}
        renderMode="final-preview"
        showFrame={false}
        hiddenNodeIds={new Set()}
        selectedNodeId="parent"
        resources={resources}
        onSelectNode={vi.fn()}
        onNodeContextMenu={vi.fn()}
        onNodePointerDown={onNodePointerDown}
        onNodePointerMove={vi.fn()}
        onNodePointerUp={vi.fn()}
        onNodePointerCancel={vi.fn()}
        onNodeResizePointerDown={vi.fn()}
        onNodeResizePointerMove={vi.fn()}
        onNodeResizePointerUp={vi.fn()}
        onNodeResizePointerCancel={vi.fn()}
        onSelectExclusiveChild={onSelectChild}
        viewportScale={1}
      />,
    );

    const tab = screen.getByRole('tab', { name: 'child-b' });
    fireEvent.pointerDown(tab, { button: 0, pointerId: 1 });
    fireEvent.click(tab);

    expect(onNodePointerDown).not.toHaveBeenCalled();
    expect(onSelectChild).toHaveBeenCalledWith('child-b');
  });

  it('opens a context-menu target only from editor overlay nodes', () => {
    const onNodeContextMenu = vi.fn();
    const onSelectNode = vi.fn();
    const editorOverlay = render(
      <UiTreeRenderer
        tree={tree}
        renderMode="editor-overlay"
        showFrame={false}
        hiddenNodeIds={new Set()}
        selectedNodeId={null}
        resources={resources}
        onSelectNode={onSelectNode}
        onNodeContextMenu={onNodeContextMenu}
        onNodePointerDown={vi.fn()}
        onNodePointerMove={vi.fn()}
        onNodePointerUp={vi.fn()}
        onNodePointerCancel={vi.fn()}
        onNodeResizePointerDown={vi.fn()}
        onNodeResizePointerMove={vi.fn()}
        onNodeResizePointerUp={vi.fn()}
        onNodeResizePointerCancel={vi.fn()}
        viewportScale={1}
      />,
    );
    const child = editorOverlay.container.querySelector(
      '[data-node-id="child"]',
    ) as HTMLDivElement;
    fireEvent.contextMenu(child, { clientX: 32, clientY: 48 });
    expect(onSelectNode).toHaveBeenCalledWith('child');
    expect(onNodeContextMenu).toHaveBeenCalledWith(
      expect.anything(),
      expect.objectContaining({ id: 'child' }),
      false,
    );
    editorOverlay.unmount();

    const finalPreview = renderTree('final-preview', new Set(), {
      onNodeContextMenu,
    });
    fireEvent.contextMenu(
      finalPreview.container.querySelector('[data-node-id="child"]')!,
    );
    expect(onNodeContextMenu).toHaveBeenCalledTimes(1);
  });
});