/** @vitest-environment jsdom */
import { readFileSync } from 'node:fs';
import { resolve } from 'node:path';

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

import type { ProjectResourceCanvasPosition } from '../../../packages/shared/src/contracts/gameCreationApp';
import type { ProjectResourceCanvasCategory } from '../../../packages/shared/src/contracts/gameCreationApp';
import {
  RESOURCE_CANVAS_CARD_WIDTH,
  RESOURCE_CANVAS_DEPENDENCY_COLUMN_GAP,
  type ResourceCanvasCardSize,
} from '../src/view/project-development/resourceCanvasLayoutModel';
import {
  normalizeProjectResourceGraph,
  type ProjectResourceGraph,
  type ProjectResourceGraphReadModel,
} from '../src/view/project-development/resourceDependencyGraphModel';
import {
  ResourceDependencyOverlay,
  type ResourceDependencyOverlayHandle,
} from '../src/view/project-development/ResourceDependencyOverlay';

function position(
  resourceId: string,
  x: number,
  y: number,
  section: ProjectResourceCanvasCategory = 'scene',
): ProjectResourceCanvasPosition {
  return {
    resourceId,
    section,
    x,
    y,
    manuallyPlaced: false,
  };
}

function graphFixture() {
  const referenceId = 'asset-reference:["source:one","target:one"]';
  const selfReferenceId = 'asset-reference:["unrelated","unrelated"]';
  const flowId = 'task-flow:["source-task","target-task"]';
  const resourceIds = [
    'source:one',
    'source:two',
    'source:three',
    'target:one',
    'target:two',
    'target:three',
    'unrelated',
  ];
  const readModel: ProjectResourceGraphReadModel = {
    resourceIds,
    referenceEdges: [
      {
        id: referenceId,
        kind: 'asset-reference',
        sourceResourceId: 'source:one',
        targetResourceId: 'target:one',
        cyclic: false,
      },
      {
        id: selfReferenceId,
        kind: 'asset-reference',
        sourceResourceId: 'unrelated',
        targetResourceId: 'unrelated',
        cyclic: true,
      },
    ],
    taskFlows: [
      {
        id: flowId,
        kind: 'task-flow',
        sourceTaskId: 'source-task',
        targetTaskId: 'target-task',
        sourceResourceIds: ['source:one', 'source:two', 'source:three'],
        targetResourceIds: ['target:one', 'target:two', 'target:three'],
        cyclic: false,
      },
    ],
    connectionIndex: resourceIds.map((resourceId) => ({
      resourceId,
      upstreamReferenceResourceIds:
        resourceId === 'target:one'
          ? ['source:one']
          : resourceId === 'unrelated'
            ? ['unrelated']
            : [],
      downstreamReferenceResourceIds:
        resourceId === 'source:one'
          ? ['target:one']
          : resourceId === 'unrelated'
            ? ['unrelated']
            : [],
      referenceEdgeIds:
        resourceId === 'source:one' || resourceId === 'target:one'
          ? [referenceId]
          : resourceId === 'unrelated'
            ? [selfReferenceId]
            : [],
      taskFlowIds: resourceId === 'unrelated' ? [] : [flowId],
    })),
    producerAssignments: [],
    dependencyDepths: [],
    unresolvedReferenceResourceIds: [],
    cyclicResourceIds: ['unrelated'],
    cyclicTaskIds: [],
    producerMappingTruncated: false,
  };
  return normalizeProjectResourceGraph(readModel);
}

function OverlayHarness({
  graph,
  positions,
  visibleResourceIds,
  overlayRef,
}: {
  graph: ProjectResourceGraph;
  positions: ProjectResourceCanvasPosition[];
  visibleResourceIds: ReadonlySet<string>;
  overlayRef?: React.Ref<ResourceDependencyOverlayHandle>;
}) {
  const sections = Array.from(
    new Set(positions.map((position) => position.section)),
  );
  return React.createElement(
    'div',
    { 'data-testid': 'resource-dependency-overlay' },
    ...sections.map((section) =>
      React.createElement(
        'div',
        {
          key: section,
          'data-resource-section-scroll': section,
        },
        React.createElement(
          'div',
          {
            'data-resource-section-plane': section,
            'data-resource-section-scale': '1',
          },
          React.createElement(ResourceDependencyOverlay, {
            ref: section === sections[0] ? overlayRef : undefined,
            graph,
            positions,
            section,
            visibleResourceIds,
          }),
        ),
      ),
    ),
  );
}

function overlayView(
  graph: ProjectResourceGraph,
  positions: ProjectResourceCanvasPosition[],
  visibleResourceIds: ReadonlySet<string>,
  overlayRef?: React.Ref<ResourceDependencyOverlayHandle>,
) {
  return React.createElement(OverlayHarness, {
    graph,
    positions,
    visibleResourceIds,
    overlayRef,
  });
}

describe('ResourceDependencyOverlay', () => {
  it('renders exact references without visualizing aggregated task flows', async () => {
    const graph = graphFixture();
    const positions = Array.from(graph.resourceIds).map((resourceId, index) =>
      position(resourceId, (index % 3) * 220, Math.floor(index / 3) * 120),
    );
    render(overlayView(graph, positions, new Set(graph.resourceIds)));

    const overlay = await screen.findByTestId('resource-dependency-overlay');
    await waitFor(() =>
      expect(
        overlay.querySelectorAll('[data-edge-kind="asset-reference"]'),
      ).toHaveLength(2),
    );
    expect(overlay.querySelector('[data-edge-kind="task-flow"]')).toBeNull();
    expect(overlay.querySelector('marker[id$="-task-flow-arrow"]')).toBeNull();
  });

  it('在统一 world 模式下渲染跨分类引用，并使用稳定的 world 标识', async () => {
    const graph = graphFixture();
    const positions = [
      position('source:one', 0, 0, 'scene'),
      position('target:one', 220, 0, 'document'),
    ];
    render(
      React.createElement(
        'div',
        null,
        React.createElement(ResourceDependencyOverlay, {
          graph,
          positions,
          visibleResourceIds: new Set(
            positions.map(({ resourceId }) => resourceId),
          ),
        }),
      ),
    );

    const overlay = await screen.findByTestId(
      'resource-dependency-overlay-world',
    );
    expect(overlay.getAttribute('data-resource-section')).toBeNull();
    expect(
      overlay.querySelector(
        '[data-edge-kind="asset-reference"][data-source-resource-id="source:one"][data-target-resource-id="target:one"]',
      ),
    ).not.toBeNull();
  });
  it('omits task flows and cross-section exact references', async () => {
    const graph = graphFixture();
    const positions = [
      position('source:one', 0, 0, 'document'),
      position('source:two', 0, 0, 'scene'),
      position('source:three', 0, 120, 'document'),
      position('target:one', 240, 0, 'scene'),
      position('target:two', 240, 120, 'scene'),
      position('target:three', 240, 0, 'audio'),
    ];
    render(
      overlayView(
        graph,
        positions,
        new Set(positions.map((position) => position.resourceId)),
      ),
    );

    const overlay = await screen.findByTestId('resource-dependency-overlay');
    await waitFor(() =>
      expect(
        overlay.querySelectorAll('[data-edge-kind="task-flow"]'),
      ).toHaveLength(0),
    );
    expect(
      overlay.querySelectorAll('[data-edge-kind="asset-reference"]'),
    ).toHaveLength(0);
  });

  it('owns each relationship in exactly one section plane and isolates section scrolling', async () => {
    const resourceIds = [
      'art:source',
      'art:target',
      'version:source',
      'version:target',
    ];
    const artReferenceId = 'reference:art';
    const versionReferenceId = 'reference:version';
    const graph = normalizeProjectResourceGraph({
      resourceIds,
      referenceEdges: [
        {
          id: artReferenceId,
          kind: 'asset-reference',
          sourceResourceId: 'art:source',
          targetResourceId: 'art:target',
          cyclic: false,
        },
        {
          id: versionReferenceId,
          kind: 'asset-reference',
          sourceResourceId: 'version:source',
          targetResourceId: 'version:target',
          cyclic: false,
        },
      ],
      taskFlows: [],
      connectionIndex: resourceIds.map((resourceId) => ({
        resourceId,
        upstreamReferenceResourceIds: resourceId.endsWith(':target')
          ? [resourceId.replace(':target', ':source')]
          : [],
        downstreamReferenceResourceIds: resourceId.endsWith(':source')
          ? [resourceId.replace(':source', ':target')]
          : [],
        referenceEdgeIds: [
          resourceId.startsWith('art:') ? artReferenceId : versionReferenceId,
        ],
        taskFlowIds: [],
      })),
      producerAssignments: [],
      dependencyDepths: [],
      unresolvedReferenceResourceIds: [],
      cyclicResourceIds: [],
      cyclicTaskIds: [],
      producerMappingTruncated: false,
    });
    const positions = [
      position('art:source', 0, 0, 'scene'),
      position('art:target', 240, 0, 'scene'),
      position('version:source', 0, 0, 'version'),
      position('version:target', 240, 0, 'version'),
    ];
    const originalGetBoundingClientRect =
      HTMLElement.prototype.getBoundingClientRect;
    const getBoundingClientRect = vi
      .spyOn(HTMLElement.prototype, 'getBoundingClientRect')
      .mockImplementation(function getSectionRect(this: HTMLElement) {
        if (this.hasAttribute('data-resource-section-scroll')) {
          return {
            x: 0,
            y: 0,
            left: 0,
            top: 0,
            right: 600,
            bottom: 200,
            width: 600,
            height: 200,
            toJSON: () => ({}),
          } as DOMRect;
        }
        return originalGetBoundingClientRect.call(this);
      });
    try {
      const rendered = render(
        overlayView(graph, positions, new Set(resourceIds)),
      );
      const artOverlay = await screen.findByTestId(
        'resource-dependency-overlay-scene',
      );
      const versionOverlay = await screen.findByTestId(
        'resource-dependency-overlay-version',
      );
      await waitFor(() => {
        expect(
          artOverlay.querySelector(`[data-edge-id='${artReferenceId}']`),
        ).not.toBeNull();
        expect(
          versionOverlay.querySelector(
            `[data-edge-id='${versionReferenceId}']`,
          ),
        ).not.toBeNull();
      });
      expect(
        artOverlay.querySelector(`[data-edge-id='${versionReferenceId}']`),
      ).toBeNull();
      expect(
        versionOverlay.querySelector(`[data-edge-id='${artReferenceId}']`),
      ).toBeNull();
      const versionPathBeforeScroll = versionOverlay
        .querySelector(`[data-edge-id='${versionReferenceId}']`)
        ?.getAttribute('d');

      const artViewport = rendered.container.querySelector<HTMLElement>(
        '[data-resource-section-scroll="scene"]',
      );
      if (!artViewport) {
        throw new Error('missing scene viewport');
      }
      artViewport.scrollTop = 80;
      fireEvent.scroll(artViewport);
      await waitFor(() =>
        expect(artOverlay.getAttribute('data-logical-viewport')).toBe(
          '0,80,600,200',
        ),
      );
      expect(versionOverlay.getAttribute('data-logical-viewport')).toBe(
        '0,0,600,200',
      );
      expect(
        versionOverlay
          .querySelector(`[data-edge-id='${versionReferenceId}']`)
          ?.getAttribute('d'),
      ).toBe(versionPathBeforeScroll);
    } finally {
      getBoundingClientRect.mockRestore();
    }
  });

  it('assigns stable separate ports to same-section reference edges', async () => {
    const resourceIds = ['source', 'target:upper', 'target:lower'];
    const graph = normalizeProjectResourceGraph({
      resourceIds,
      referenceEdges: [
        {
          id: 'reference:upper',
          kind: 'asset-reference',
          sourceResourceId: 'source',
          targetResourceId: 'target:upper',
          cyclic: false,
        },
        {
          id: 'reference:lower',
          kind: 'asset-reference',
          sourceResourceId: 'source',
          targetResourceId: 'target:lower',
          cyclic: false,
        },
      ],
      taskFlows: [],
      connectionIndex: resourceIds.map((resourceId) => ({
        resourceId,
        upstreamReferenceResourceIds: resourceId === 'source' ? [] : ['source'],
        downstreamReferenceResourceIds:
          resourceId === 'source' ? ['target:upper', 'target:lower'] : [],
        referenceEdgeIds:
          resourceId === 'source'
            ? ['reference:upper', 'reference:lower']
            : [
                resourceId === 'target:upper'
                  ? 'reference:upper'
                  : 'reference:lower',
              ],
        taskFlowIds: [],
      })),
      producerAssignments: [],
      dependencyDepths: [],
      unresolvedReferenceResourceIds: [],
      cyclicResourceIds: [],
      cyclicTaskIds: [],
      producerMappingTruncated: false,
    });
    const positions = [
      position('source', 0, 72),
      position('target:upper', 240, 0),
      position('target:lower', 240, 144),
    ];
    const view = render(
      overlayView(graph, positions, new Set(graph.resourceIds)),
    );
    const overlay = await screen.findByTestId('resource-dependency-overlay');
    const paths = await waitFor(() => {
      const result = Array.from(
        overlay.querySelectorAll<SVGPathElement>(
          '[data-edge-kind="asset-reference"]',
        ),
      );
      expect(result).toHaveLength(2);
      return result;
    });
    expect(
      paths.map((path) => path.getAttribute('data-source-port-offset')),
    ).toEqual(['7', '-7']);
    expect(new Set(paths.map((path) => path.getAttribute('d'))).size).toBe(2);

    const firstPaths = paths.map((path) => path.getAttribute('d'));
    view.rerender(overlayView(graph, positions, new Set(graph.resourceIds)));
    await waitFor(() =>
      expect(
        Array.from(
          overlay.querySelectorAll<SVGPathElement>(
            '[data-edge-kind="asset-reference"]',
          ),
          (path) => path.getAttribute('d'),
        ),
      ).toEqual(firstPaths),
    );
  });

  it('filters hidden endpoints and updates path geometry when positions change', async () => {
    const graph = graphFixture();
    const positions = [
      position('source:one', 0, 0),
      position('target:one', 240, 0),
    ];
    const overlayRef = React.createRef<ResourceDependencyOverlayHandle>();
    const view = render(
      overlayView(
        graph,
        positions,
        new Set(['source:one', 'target:one']),
        overlayRef,
      ),
    );
    const overlay = await screen.findByTestId('resource-dependency-overlay');
    const firstPath = await waitFor(() => {
      const path = overlay.querySelector<SVGPathElement>(
        '[data-edge-kind="asset-reference"]',
      );
      expect(path).not.toBeNull();
      return path?.getAttribute('d');
    });
    const horizontalReference = overlay.querySelector<SVGPathElement>(
      '[data-edge-kind="asset-reference"]',
    );
    expect(horizontalReference?.getAttribute('data-route-axis')).toBe(
      'horizontal',
    );
    expect(horizontalReference?.getAttribute('marker-end')).toContain(
      'asset-reference-arrow',
    );
    expect(firstPath).toContain('230 64');

    act(() =>
      overlayRef.current?.updateDragPreview({
        resourceId: 'source:one',
        x: 80,
        y: 40,
      }),
    );
    await waitFor(() =>
      expect(
        overlay
          .querySelector('[data-edge-kind="asset-reference"]')
          ?.getAttribute('d'),
      ).not.toBe(firstPath),
    );

    view.rerender(overlayView(graph, positions, new Set(['target:one'])));
    await waitFor(() =>
      expect(
        overlay.querySelector('[data-edge-kind="asset-reference"]'),
      ).toBeNull(),
    );
  });

  it('keeps reference endpoints in the same logical plane that owns scaling', async () => {
    const graph = graphFixture();
    render(
      React.createElement(
        'div',
        { 'data-testid': 'resource-dependency-overlay' },
        React.createElement(
          'div',
          { 'data-resource-section-scroll': 'scene' },
          React.createElement(
            'div',
            {
              'data-resource-section-plane': 'scene',
              'data-resource-section-scale': '1.5',
            },
            React.createElement(ResourceDependencyOverlay, {
              graph,
              positions: [
                position('source:one', 0, 0),
                position(
                  'target:one',
                  RESOURCE_CANVAS_CARD_WIDTH +
                    RESOURCE_CANVAS_DEPENDENCY_COLUMN_GAP,
                  0,
                ),
              ],
              section: 'scene',
              visibleResourceIds: new Set(['source:one', 'target:one']),
              geometryRevision: '340@1.5',
            }),
          ),
        ),
      ),
    );

    const overlay = await screen.findByTestId('resource-dependency-overlay');
    const reference = await waitFor(() => {
      const path = overlay.querySelector<SVGPathElement>(
        '[data-edge-kind="asset-reference"]',
      );
      expect(path).not.toBeNull();
      return path as SVGPathElement;
    });
    expect(reference.getAttribute('data-route-axis')).toBe('horizontal');
    expect(reference.getAttribute('d')).toBe('M 180 64 L 218 64');
    expect(reference.closest('[data-resource-section-scale="1.5"]')).not.toBe(
      null,
    );
  });

  it('routes references from each resource actual card rectangle', async () => {
    const graph = graphFixture();
    const cardSizeByResourceId = new Map<string, ResourceCanvasCardSize>([
      ['source:one', { width: 220, height: 180 }],
      ['target:one', { width: 96, height: 180 }],
    ]);
    render(
      React.createElement(
        'div',
        { 'data-testid': 'resource-dependency-overlay' },
        React.createElement(
          'div',
          { 'data-resource-section-scroll': 'scene' },
          React.createElement(
            'div',
            {
              'data-resource-section-plane': 'scene',
              'data-resource-section-scale': '1',
            },
            React.createElement(ResourceDependencyOverlay, {
              graph,
              positions: [
                position('source:one', 0, 0),
                position('target:one', 268, 0),
              ],
              section: 'scene',
              visibleResourceIds: new Set(['source:one', 'target:one']),
              cardSizeByResourceId,
            }),
          ),
        ),
      ),
    );

    const overlay = await screen.findByTestId('resource-dependency-overlay');
    const reference = await waitFor(() => {
      const path = overlay.querySelector<SVGPathElement>(
        '[data-edge-kind="asset-reference"]',
      );
      expect(path).not.toBeNull();
      return path as SVGPathElement;
    });
    expect(reference.getAttribute('data-route-axis')).toBe('horizontal');
    expect(reference.getAttribute('d')).toBe('M 220 90 L 258 90');
  });

  it('keeps a relationship mounted while scrolling partial cards and marks an offscreen continuation', async () => {
    const graph = graphFixture();
    const originalGetBoundingClientRect =
      HTMLElement.prototype.getBoundingClientRect;
    const getBoundingClientRect = vi
      .spyOn(HTMLElement.prototype, 'getBoundingClientRect')
      .mockImplementation(function getSectionRect(this: HTMLElement) {
        const rect = (
          left: number,
          top: number,
          width: number,
          height: number,
        ) =>
          ({
            x: left,
            y: top,
            left,
            top,
            right: left + width,
            bottom: top + height,
            width,
            height,
            toJSON: () => ({}),
          }) as DOMRect;
        if (this.classList.contains('test-resource-content')) {
          return rect(0, 0, 600, 600);
        }
        if (this.dataset.resourceSectionScroll === 'scene') {
          return rect(0, 100, 600, 240);
        }
        if (this.dataset.resourceSectionPlane === 'scene') {
          const viewport = this.closest<HTMLElement>(
            '[data-resource-section-scroll="scene"]',
          );
          return rect(0, 100 - (viewport?.scrollTop ?? 0), 600, 600);
        }
        return originalGetBoundingClientRect.call(this);
      });
    try {
      const rendered = render(
        React.createElement(
          'div',
          {
            className: 'test-resource-content',
            'data-testid': 'resource-dependency-overlay',
          },
          React.createElement(
            'div',
            { 'data-resource-section-scroll': 'scene' },
            React.createElement(
              'div',
              {
                'data-resource-section-plane': 'scene',
                'data-resource-section-scale': '1',
              },
              React.createElement(ResourceDependencyOverlay, {
                graph,
                positions: [
                  position('source:one', 0, 0),
                  position('target:one', 0, 320),
                ],
                section: 'scene',
                visibleResourceIds: new Set(['source:one', 'target:one']),
              }),
            ),
          ),
        ),
      );
      const overlay = await screen.findByTestId('resource-dependency-overlay');
      const selector = '[data-edge-kind="asset-reference"]';
      const reference = await waitFor(() => {
        const path = overlay.querySelector<SVGPathElement>(selector);
        expect(path).not.toBeNull();
        expect(path?.getAttribute('data-route-axis')).toBe('vertical');
        return path as SVGPathElement;
      });
      expect(reference.getAttribute('marker-end')).toContain(
        'asset-reference-arrow',
      );
      expect(reference.getAttribute('data-edge-continuation')).toBe('outgoing');
      expect(reference.getAttribute('data-offscreen-target')).toBe('true');

      const viewport = rendered.container.querySelector<HTMLElement>(
        '[data-resource-section-scroll="scene"]',
      );
      if (!viewport) {
        throw new Error('missing scene viewport');
      }
      viewport.scrollTop = 80;
      fireEvent.scroll(viewport);
      await waitFor(() =>
        expect(overlay.querySelector(selector)).toBe(reference),
      );
      viewport.scrollTop = 180;
      fireEvent.scroll(viewport);
      await waitFor(() => {
        expect(overlay.querySelector(selector)).toBe(reference);
        expect(reference.getAttribute('data-edge-continuation')).toBe(
          'incoming',
        );
      });
      viewport.scrollTop = 500;
      fireEvent.scroll(viewport);
      await waitFor(() =>
        expect(Boolean(overlay.querySelector(selector))).toBe(false),
      );
    } finally {
      getBoundingClientRect.mockRestore();
    }
  });

  it('culls paged dependency edges from the transformed canvas viewport', async () => {
    const graph = graphFixture();
    const originalGetBoundingClientRect =
      HTMLElement.prototype.getBoundingClientRect;
    const getBoundingClientRect = vi
      .spyOn(HTMLElement.prototype, 'getBoundingClientRect')
      .mockImplementation(function getPagedCanvasRect(this: HTMLElement) {
        if (this.dataset.resourceSectionScroll === 'scene') {
          return {
            x: 0,
            y: 0,
            left: 0,
            top: 0,
            right: 600,
            bottom: 240,
            width: 600,
            height: 240,
            toJSON: () => ({}),
          } as DOMRect;
        }
        return originalGetBoundingClientRect.call(this);
      });
    const view = (canvasViewport: { x: number; y: number; scale: number }) =>
      React.createElement(
        'div',
        { className: 'game-resource-canvas--dependency' },
        React.createElement(
          'div',
          { 'data-resource-section-scroll': 'scene' },
          React.createElement(
            'div',
            { className: 'game-resource-page-world' },
            React.createElement(ResourceDependencyOverlay, {
              graph,
              positions: [
                position('source:one', 0, 0),
                position('target:one', 0, 320),
              ],
              section: 'scene',
              visibleResourceIds: new Set(['source:one', 'target:one']),
              canvasViewport,
            }),
          ),
        ),
      );
    try {
      const rendered = render(view({ x: 0, y: 0, scale: 1 }));
      const overlay = await screen.findByTestId(
        'resource-dependency-overlay-scene',
      );
      const selector = '[data-edge-kind="asset-reference"]';
      await waitFor(() => {
        expect(overlay.dataset.logicalViewport).toBe('0,0,600,240');
        expect(
          overlay
            .querySelector(selector)
            ?.getAttribute('data-edge-continuation'),
        ).toBe('outgoing');
      });

      rendered.rerender(view({ x: 0, y: -180, scale: 1 }));
      await waitFor(() => {
        expect(overlay.dataset.logicalViewport).toBe('0,180,600,240');
        expect(
          overlay
            .querySelector(selector)
            ?.getAttribute('data-edge-continuation'),
        ).toBe('incoming');
      });

      rendered.rerender(view({ x: 0, y: -1_000, scale: 2 }));
      await waitFor(() => {
        expect(overlay.dataset.logicalViewport).toBe('0,500,300,120');
        expect(overlay.querySelector(selector)).toBeNull();
      });
    } finally {
      getBoundingClientRect.mockRestore();
    }
  });

  it('keeps drag previews in plane-local coordinates', async () => {
    const getBoundingClientRect = vi
      .spyOn(HTMLElement.prototype, 'getBoundingClientRect')
      .mockImplementation(function () {
        const isPlane = this.hasAttribute('data-resource-section-plane');
        return {
          x: isPlane ? 160 : 20,
          y: isPlane ? 90 : 10,
          left: isPlane ? 160 : 20,
          top: isPlane ? 90 : 10,
          right: 0,
          bottom: 0,
          width: 0,
          height: 0,
          toJSON: () => ({}),
        };
      });
    try {
      const graph = graphFixture();
      const positions = [
        position('source:one', 0, 0),
        position('target:one', 240, 0),
      ];
      const visible = new Set(['source:one', 'target:one']);
      const overlayRef = React.createRef<ResourceDependencyOverlayHandle>();
      render(overlayView(graph, positions, visible, overlayRef));
      const overlay = await screen.findByTestId('resource-dependency-overlay');
      const selector = '[data-edge-kind="asset-reference"]';
      await waitFor(() =>
        expect(overlay.querySelector(selector)?.getAttribute('d')).toContain(
          'M 180 64 L 230 64',
        ),
      );

      act(() =>
        overlayRef.current?.updateDragPreview({
          resourceId: 'source:one',
          x: 80,
          y: 40,
        }),
      );
      await waitFor(() =>
        expect(
          overlay.querySelector(selector)?.getAttribute('data-route-axis'),
        ).toBe('vertical'),
      );
      expect(overlay.querySelector(selector)?.getAttribute('d')).toContain(
        'M 170 40',
      );
    } finally {
      getBoundingClientRect.mockRestore();
    }
  });

  it('routes a cyclic self-reference outside the resource card and moves it with the card', async () => {
    const graph = graphFixture();
    const view = render(
      overlayView(
        graph,
        [position('unrelated', 24, 32)],
        new Set(['unrelated']),
      ),
    );
    const overlay = await screen.findByTestId('resource-dependency-overlay');
    const selfLoopSelector =
      '[data-edge-kind="asset-reference"]' +
      '[data-source-resource-id="unrelated"]' +
      '[data-target-resource-id="unrelated"]';
    const selfLoop = await waitFor(() => {
      const path = overlay.querySelector<SVGPathElement>(selfLoopSelector);
      expect(path).not.toBeNull();
      return path as SVGPathElement;
    });

    expect(selfLoop.getAttribute('data-cyclic')).toBe('true');
    expect(selfLoop.getAttribute('data-self-loop')).toBe('true');
    expect(selfLoop.getAttribute('d')).toBe(
      'M 214 114 C 270 114, 270 78, 214 78',
    );
    expect(selfLoop.getAttribute('marker-end')).toContain(
      'asset-reference-arrow',
    );

    view.rerender(
      overlayView(
        graph,
        [position('unrelated', 84, 48)],
        new Set(['unrelated']),
      ),
    );
    await waitFor(() =>
      expect(selfLoop.getAttribute('d')).toBe(
        'M 274 130 C 330 130, 330 94, 274 94',
      ),
    );
  });

  it('keeps every rendered relationship at its default visual state', async () => {
    const graph = graphFixture();
    const positions = Array.from(graph.resourceIds).map((resourceId, index) =>
      position(resourceId, index * 200, 0),
    );
    render(overlayView(graph, positions, new Set(graph.resourceIds)));
    const overlay = await screen.findByTestId('resource-dependency-overlay');
    await waitFor(() =>
      expect(overlay.querySelectorAll('[data-edge-kind]')).toHaveLength(2),
    );
    expect(overlay.querySelector('.is-highlighted')).toBeNull();
    expect(overlay.querySelector('.is-dimmed')).toBeNull();
  });

  it('keeps 4096-resource exact-reference output bounded to positioned members', async () => {
    const resourceIds = Array.from(
      { length: 4096 },
      (_, index) => `resource:${index}`,
    );
    const referenceEdges = resourceIds.slice(1).map((resourceId, index) => ({
      id: `reference:${index}:${index + 1}`,
      kind: 'asset-reference' as const,
      sourceResourceId: `resource:${index}`,
      targetResourceId: resourceId,
      cyclic: false,
    }));
    const graph = normalizeProjectResourceGraph({
      resourceIds,
      referenceEdges,
      taskFlows: [],
      connectionIndex: resourceIds.map((resourceId, index) => ({
        resourceId,
        upstreamReferenceResourceIds:
          index > 0 ? [`resource:${index - 1}`] : [],
        downstreamReferenceResourceIds:
          index < resourceIds.length - 1 ? [`resource:${index + 1}`] : [],
        referenceEdgeIds: [
          ...(index > 0 ? [`reference:${index - 1}:${index}`] : []),
          ...(index < resourceIds.length - 1
            ? [`reference:${index}:${index + 1}`]
            : []),
        ],
        taskFlowIds: [],
      })),
      producerAssignments: [],
      dependencyDepths: [],
      unresolvedReferenceResourceIds: [],
      cyclicResourceIds: [],
      cyclicTaskIds: [],
      producerMappingTruncated: false,
    });
    const positions = [
      position('resource:2047', 0, 0),
      position('resource:2048', 220, 0),
      position('resource:2049', 440, 0),
    ];
    const visible = new Set(positions.map(({ resourceId }) => resourceId));
    const overlayRef = React.createRef<ResourceDependencyOverlayHandle>();
    render(overlayView(graph, positions, visible, overlayRef));
    const overlay = await screen.findByTestId('resource-dependency-overlay');
    await waitFor(() =>
      expect(
        overlay.querySelectorAll('[data-edge-kind="asset-reference"]'),
      ).toHaveLength(2),
    );
    expect(overlay.querySelector('[data-edge-kind="task-flow"]')).toBeNull();
    act(() =>
      overlayRef.current?.updateDragPreview({
        resourceId: 'resource:2048',
        x: 260,
        y: 32,
      }),
    );
    await waitFor(() =>
      expect(
        overlay.querySelectorAll('[data-edge-kind="asset-reference"]'),
      ).toHaveLength(2),
    );
  });

  it('disconnects layout observers when the SVG layer is destroyed', () => {
    const observe = vi.fn();
    const disconnect = vi.fn();
    const construct = vi.fn();
    class TestResizeObserver {
      constructor(_callback: ResizeObserverCallback) {
        construct();
      }

      observe = observe;
      unobserve = vi.fn();
      disconnect = disconnect;
    }
    vi.stubGlobal('ResizeObserver', TestResizeObserver);
    try {
      const graph = graphFixture();
      const positions = Array.from(graph.resourceIds).map((resourceId, index) =>
        position(resourceId, index * 200, 0),
      );
      const overlayRef = React.createRef<ResourceDependencyOverlayHandle>();
      const view = render(
        overlayView(graph, positions, new Set(graph.resourceIds), overlayRef),
      );

      expect(construct).toHaveBeenCalledTimes(1);
      expect(observe).toHaveBeenCalledTimes(2);
      act(() =>
        overlayRef.current?.updateDragPreview({
          resourceId: 'source:one',
          x: 32,
          y: 24,
        }),
      );
      view.rerender(
        overlayView(graph, positions, new Set(graph.resourceIds), overlayRef),
      );
      expect(construct).toHaveBeenCalledTimes(1);
      expect(observe).toHaveBeenCalledTimes(2);
      view.unmount();
      expect(disconnect).toHaveBeenCalledTimes(1);
    } finally {
      vi.unstubAllGlobals();
    }
  });

  it('uses a persistent orange with at least 3:1 canvas contrast', () => {
    const styles = readFileSync(
      resolve(process.cwd(), 'apps/ai-game-creator-shell/src/styles.css'),
      'utf8',
    );
    expect(styles).toMatch(
      /\.game-resource-dependency-edge--reference\s*\{[^}]*stroke:\s*#c45f20[^}]*opacity:\s*1/s,
    );
    expect(styles).toMatch(
      /\.game-resource-dependency-marker--reference path\s*\{[^}]*fill:\s*#c45f20/s,
    );
    const luminance = (hex: string) => {
      const channels = hex
        .match(/[a-f\d]{2}/giu)!
        .map((value) => Number.parseInt(value, 16) / 255)
        .map((value) =>
          value <= 0.04045 ? value / 12.92 : ((value + 0.055) / 1.055) ** 2.4,
        );
      return channels[0] * 0.2126 + channels[1] * 0.7152 + channels[2] * 0.0722;
    };
    const lineLuminance = luminance('c45f20');
    const canvasLuminance = luminance('fffdfa');
    const contrast =
      (Math.max(lineLuminance, canvasLuminance) + 0.05) /
      (Math.min(lineLuminance, canvasLuminance) + 0.05);
    expect(contrast).toBeGreaterThanOrEqual(3);
    expect(styles).not.toMatch(
      /\.game-resource-dependency-edge\.is-(?:highlighted|dimmed)/,
    );
  });
});