// @vitest-environment jsdom

import { act, cleanup, renderHook, waitFor } from '@testing-library/react';
import { afterEach, describe, expect, it, vi } from 'vitest';

import type {
  ProjectResourceCanvasLayout,
  ProjectResourceCanvasLayoutMode,
  ProjectResourceCanvasPosition,
} from '../../../packages/shared/src/contracts/gameCreationApp';
import { GAME_CREATION_RESOURCE_LAYOUT_MAX_SAFE_REVISION } from '../../../packages/shared/src/contracts/gameCreationApp';
import type { ResourceCanvasItem } from '../src/view/project-development/resourceCanvasLayoutModel';
import {
  createResourceSignature,
  useProjectResourceCanvasLayout,
} from '../src/view/project-development/useProjectResourceCanvasLayout';

const projectId = 'layout-hook-project';
const projectPath = '/tmp/layout-hook-project';

function resource(id: string): ResourceCanvasItem {
  return {
    id,
    category: 'document',
    subtype: 'agent-result',
    label: id,
    mediaType: 'text/markdown',
    dependencyDepth: 0,
  };
}

function persistedLayout(
  mode: ProjectResourceCanvasLayoutMode,
  revision: number,
  positions: ProjectResourceCanvasPosition[],
): ProjectResourceCanvasLayout {
  return {
    schemaVersion: 'game-creator-resource-layout.v1',
    projectId,
    mode,
    revision,
    positions,
    updatedAt: revision * 100,
  };
}

function position(
  resourceId: string,
  x: number,
  y: number,
): ProjectResourceCanvasPosition {
  return {
    resourceId,
    section: 'document',
    x,
    y,
    manuallyPlaced: true,
  };
}

function automaticPosition(
  resourceId: string,
  x: number,
  y: number,
): ProjectResourceCanvasPosition {
  return {
    ...position(resourceId, x, y),
    manuallyPlaced: false,
  };
}

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

describe('useProjectResourceCanvasLayout', () => {
  it('includes subtype changes in the resource coordination signature', () => {
    const original = resource('resource-a');
    expect(createResourceSignature([original])).not.toBe(
      createResourceSignature([{ ...original, subtype: 'task-artifact' }]),
    );
  });

  it('waits for dependency graph initialization before reading or writing layout', async () => {
    const updates: ProjectResourceCanvasPosition[][] = [];
    const invoke = vi.fn(
      async (command: string, args?: Record<string, unknown>) => {
        if (command === 'read_local_project_resource_canvas_layout') {
          return persistedLayout('dependency', 0, []);
        }
        if (command === 'update_local_project_resource_canvas_layout') {
          const positions = structuredClone(
            args?.positions as ProjectResourceCanvasPosition[],
          );
          updates.push(positions);
          return {
            status: 'updated',
            layout: persistedLayout('dependency', 1, positions),
          };
        }
        throw new Error(`unexpected invoke ${command}`);
      },
    );
    window.__TAURI__ = { core: { invoke } };
    const shallowResource = resource('resource-a');
    const deepResource = { ...shallowResource, dependencyDepth: 2 };
    const { result, rerender } = renderHook(
      ({ initializationReady, resources }) =>
        useProjectResourceCanvasLayout({
          projectPath,
          projectId,
          mode: 'dependency',
          resources,
          initializationReady,
          rederiveAutomaticPositions: true,
        }),
      {
        initialProps: {
          initializationReady: false,
          resources: [shallowResource],
        },
      },
    );

    expect(invoke).not.toHaveBeenCalled();
    expect(result.current.layout.positions).toEqual([]);

    rerender({ initializationReady: true, resources: [deepResource] });
    await waitFor(() => expect(updates).toHaveLength(1));
    expect(result.current.layout.positions[0]).toMatchObject({
      resourceId: 'resource-a',
      x: 392,
      manuallyPlaced: false,
    });
    expect(invoke.mock.calls[0]?.[0]).toBe(
      'read_local_project_resource_canvas_layout',
    );
  });

  it('persists distinct automatic columns for dependency depths 0, 1, and 2', async () => {
    const updates: ProjectResourceCanvasPosition[][] = [];
    const invoke = vi.fn(
      async (command: string, args?: Record<string, unknown>) => {
        if (command === 'read_local_project_resource_canvas_layout') {
          return persistedLayout('dependency', 0, []);
        }
        if (command === 'update_local_project_resource_canvas_layout') {
          const positions = structuredClone(
            args?.positions as ProjectResourceCanvasPosition[],
          );
          updates.push(positions);
          return {
            status: 'updated',
            layout: persistedLayout('dependency', 1, positions),
          };
        }
        throw new Error(`unexpected invoke ${command}`);
      },
    );
    window.__TAURI__ = { core: { invoke } };

    renderHook(() =>
      useProjectResourceCanvasLayout({
        projectPath,
        projectId,
        mode: 'dependency',
        resources: [
          resource('resource-depth-0'),
          { ...resource('resource-depth-1'), dependencyDepth: 1 },
          { ...resource('resource-depth-2'), dependencyDepth: 2 },
        ],
        rederiveAutomaticPositions: true,
      }),
    );

    await waitFor(() => expect(updates).toHaveLength(1));
    expect(updates[0]).toEqual(
      expect.arrayContaining([
        expect.objectContaining({
          resourceId: 'resource-depth-0',
          x: 0,
          y: 0,
          manuallyPlaced: false,
        }),
        expect.objectContaining({
          resourceId: 'resource-depth-1',
          x: 196,
          y: 0,
          manuallyPlaced: false,
        }),
        expect.objectContaining({
          resourceId: 'resource-depth-2',
          x: 392,
          y: 0,
          manuallyPlaced: false,
        }),
      ]),
    );
  });

  it('rederives automatic dependency positions while preserving manual positions', async () => {
    const resourceA = { ...resource('resource-a'), dependencyDepth: 2 };
    const resourceB = resource('resource-b');
    const updates: ProjectResourceCanvasPosition[][] = [];
    const invoke = vi.fn(
      async (command: string, args?: Record<string, unknown>) => {
        if (command === 'read_local_project_resource_canvas_layout') {
          return persistedLayout('dependency', 4, [
            automaticPosition('resource-a', 0, 0),
            position('resource-b', 600, 40),
          ]);
        }
        if (command === 'update_local_project_resource_canvas_layout') {
          const positions = structuredClone(
            args?.positions as ProjectResourceCanvasPosition[],
          );
          updates.push(positions);
          return {
            status: 'updated',
            layout: persistedLayout('dependency', 5, positions),
          };
        }
        throw new Error(`unexpected invoke ${command}`);
      },
    );
    window.__TAURI__ = { core: { invoke } };

    const { result } = renderHook(() =>
      useProjectResourceCanvasLayout({
        projectPath,
        projectId,
        mode: 'dependency',
        resources: [resourceA, resourceB],
        rederiveAutomaticPositions: true,
      }),
    );

    await waitFor(() => expect(updates).toHaveLength(1));
    expect(result.current.layout.positions).toEqual(
      expect.arrayContaining([
        expect.objectContaining({
          resourceId: 'resource-a',
          x: 392,
          manuallyPlaced: false,
        }),
        expect.objectContaining({
          resourceId: 'resource-b',
          x: 600,
          y: 40,
          manuallyPlaced: true,
        }),
      ]),
    );
  });

  it('rejects an unsafe revision from the initial IPC read without writing', async () => {
    const resourceA = resource('resource-a');
    const invoke = vi.fn(async (command: string) => {
      if (command === 'read_local_project_resource_canvas_layout') {
        return persistedLayout(
          'dependency',
          GAME_CREATION_RESOURCE_LAYOUT_MAX_SAFE_REVISION + 1,
          [position('resource-a', 10, 20)],
        );
      }
      throw new Error(`unexpected invoke ${command}`);
    });
    window.__TAURI__ = { core: { invoke } };

    const { result } = renderHook(() =>
      useProjectResourceCanvasLayout({
        projectPath,
        projectId,
        mode: 'dependency',
        resources: [resourceA],
      }),
    );

    await waitFor(() =>
      expect(result.current.notice).toBe('布局读取失败，已使用当前会话布局'),
    );
    expect(
      invoke.mock.calls.filter(
        ([command]) =>
          command === 'update_local_project_resource_canvas_layout',
      ),
    ).toHaveLength(0);
  });

  it('rejects an unsafe revision from an update response and restores the trusted layout', async () => {
    const resourceA = resource('resource-a');
    const invoke = vi.fn(
      async (command: string, args?: Record<string, unknown>) => {
        if (command === 'read_local_project_resource_canvas_layout') {
          return persistedLayout('dependency', 1, [
            position('resource-a', 10, 20),
          ]);
        }
        if (command === 'update_local_project_resource_canvas_layout') {
          return {
            status: 'updated',
            layout: persistedLayout(
              'dependency',
              GAME_CREATION_RESOURCE_LAYOUT_MAX_SAFE_REVISION + 1,
              structuredClone(
                args?.positions as ProjectResourceCanvasPosition[],
              ),
            ),
          };
        }
        throw new Error(`unexpected invoke ${command}`);
      },
    );
    window.__TAURI__ = { core: { invoke } };
    const { result } = renderHook(() =>
      useProjectResourceCanvasLayout({
        projectPath,
        projectId,
        mode: 'dependency',
        resources: [resourceA],
      }),
    );
    await waitFor(() => expect(result.current.layout.positions[0]?.x).toBe(10));

    act(() => result.current.commitPosition('resource-a', 'document', 100, 30));

    await waitFor(() =>
      expect(result.current.notice).toBe('布局保存失败，已恢复上次布局'),
    );
    expect(result.current.layout.positions[0]).toMatchObject({ x: 10, y: 20 });
    expect(result.current.saving).toBe(false);
  });

  it('uses the latest resource snapshot when the initial scope read resolves', async () => {
    const resourceA = resource('resource-a');
    const resourceB = resource('resource-b');
    let resolveRead: ((layout: ProjectResourceCanvasLayout) => void) | null =
      null;
    const updates: Array<{
      expectedProjectId: string;
      expectedRevision: number;
      positions: ProjectResourceCanvasPosition[];
    }> = [];
    const invoke = vi.fn(
      async (command: string, args?: Record<string, unknown>) => {
        if (command === 'read_local_project_resource_canvas_layout') {
          return await new Promise<ProjectResourceCanvasLayout>((resolve) => {
            resolveRead = resolve;
          });
        }
        if (command === 'update_local_project_resource_canvas_layout') {
          const input = args as {
            expectedProjectId: string;
            expectedRevision: number;
            positions: ProjectResourceCanvasPosition[];
          };
          updates.push(structuredClone(input));
          return {
            status: 'updated',
            layout: persistedLayout(
              'dependency',
              input.expectedRevision + 1,
              structuredClone(input.positions),
            ),
          };
        }
        throw new Error(`unexpected invoke ${command}`);
      },
    );
    window.__TAURI__ = { core: { invoke } };
    const { result, rerender } = renderHook(
      ({ resources }: { resources: ResourceCanvasItem[] }) =>
        useProjectResourceCanvasLayout({
          projectPath,
          projectId,
          mode: 'dependency',
          resources,
        }),
      { initialProps: { resources: [resourceA] } },
    );
    await waitFor(() => expect(resolveRead).not.toBeNull());

    rerender({ resources: [resourceA, resourceB] });
    await act(async () => {
      resolveRead?.(
        persistedLayout('dependency', 1, [position('resource-a', 10, 20)]),
      );
      await Promise.resolve();
    });

    await waitFor(() => expect(updates).toHaveLength(1));
    expect(
      result.current.layout.positions.map(({ resourceId }) => resourceId),
    ).toEqual(expect.arrayContaining(['resource-a', 'resource-b']));
    expect(updates[0]?.expectedRevision).toBe(1);
    expect(updates[0]?.expectedProjectId).toBe(projectId);
    expect(
      updates[0]?.positions.some(
        ({ resourceId }) => resourceId === 'resource-b',
      ),
    ).toBe(true);
    expect(
      invoke.mock.calls.filter(
        ([command]) => command === 'read_local_project_resource_canvas_layout',
      ),
    ).toHaveLength(1);
  });

  it('keeps an in-flight manual CAS alive and serializes resource sync behind its revision', async () => {
    const resourceA = resource('resource-a');
    const resourceB = resource('resource-b');
    const updates: Array<{
      expectedRevision: number;
      positions: ProjectResourceCanvasPosition[];
    }> = [];
    let resolveFirstUpdate:
      | ((result: {
          status: 'updated';
          layout: ProjectResourceCanvasLayout;
        }) => void)
      | null = null;
    const invoke = vi.fn(
      async (command: string, args?: Record<string, unknown>) => {
        if (command === 'read_local_project_resource_canvas_layout') {
          return persistedLayout('dependency', 1, [
            position('resource-a', 10, 20),
          ]);
        }
        if (command === 'update_local_project_resource_canvas_layout') {
          const input = args as {
            expectedRevision: number;
            positions: ProjectResourceCanvasPosition[];
          };
          updates.push(structuredClone(input));
          if (updates.length === 1) {
            return await new Promise((resolve) => {
              resolveFirstUpdate = resolve;
            });
          }
          return {
            status: 'updated',
            layout: persistedLayout(
              'dependency',
              input.expectedRevision + 1,
              structuredClone(input.positions),
            ),
          };
        }
        throw new Error(`unexpected invoke ${command}`);
      },
    );
    window.__TAURI__ = { core: { invoke } };
    const { result, rerender } = renderHook(
      ({ resources }: { resources: ResourceCanvasItem[] }) =>
        useProjectResourceCanvasLayout({
          projectPath,
          projectId,
          mode: 'dependency',
          resources,
        }),
      { initialProps: { resources: [resourceA] } },
    );
    await waitFor(() => expect(result.current.layout.positions[0]?.x).toBe(10));

    act(() => result.current.commitPosition('resource-a', 'document', 100, 30));
    await waitFor(() => expect(updates).toHaveLength(1));
    rerender({ resources: [resourceA, resourceB] });
    await waitFor(() =>
      expect(
        result.current.layout.positions.some(
          ({ resourceId }) => resourceId === 'resource-b',
        ),
      ).toBe(true),
    );
    expect(updates).toHaveLength(1);

    await act(async () => {
      resolveFirstUpdate?.({
        status: 'updated',
        layout: persistedLayout(
          'dependency',
          2,
          structuredClone(updates[0]!.positions),
        ),
      });
      await Promise.resolve();
    });

    await waitFor(() => expect(updates).toHaveLength(2));
    expect(updates.map(({ expectedRevision }) => expectedRevision)).toEqual([
      1, 2,
    ]);
    expect(
      updates[1]?.positions.some(
        ({ resourceId }) => resourceId === 'resource-b',
      ),
    ).toBe(true);
  });

  it('coalesces repeated queued manual placements for the same resource behind an in-flight CAS', async () => {
    const resourceA = resource('resource-a');
    const updates: Array<{
      expectedRevision: number;
      positions: ProjectResourceCanvasPosition[];
    }> = [];
    let resolveFirstUpdate:
      | ((result: {
          status: 'updated';
          layout: ProjectResourceCanvasLayout;
        }) => void)
      | null = null;
    const invoke = vi.fn(
      async (command: string, args?: Record<string, unknown>) => {
        if (command === 'read_local_project_resource_canvas_layout') {
          return persistedLayout('dependency', 1, [
            position('resource-a', 10, 20),
          ]);
        }
        if (command === 'update_local_project_resource_canvas_layout') {
          const input = args as {
            expectedRevision: number;
            positions: ProjectResourceCanvasPosition[];
          };
          updates.push(structuredClone(input));
          if (updates.length === 1) {
            return await new Promise((resolve) => {
              resolveFirstUpdate = resolve;
            });
          }
          return {
            status: 'updated',
            layout: persistedLayout(
              'dependency',
              input.expectedRevision + 1,
              structuredClone(input.positions),
            ),
          };
        }
        throw new Error(`unexpected invoke ${command}`);
      },
    );
    window.__TAURI__ = { core: { invoke } };
    const { result } = renderHook(() =>
      useProjectResourceCanvasLayout({
        projectPath,
        projectId,
        mode: 'dependency',
        resources: [resourceA],
      }),
    );
    await waitFor(() => expect(result.current.layout.positions[0]?.x).toBe(10));

    act(() => result.current.commitPosition('resource-a', 'document', 100, 30));
    await waitFor(() => expect(updates).toHaveLength(1));
    act(() => {
      for (let x = 200; x < 300; x += 1) {
        result.current.commitPosition('resource-a', 'document', x, 40);
      }
    });
    expect(updates).toHaveLength(1);
    expect(result.current.layout.positions[0]?.x).toBe(299);

    await act(async () => {
      resolveFirstUpdate?.({
        status: 'updated',
        layout: persistedLayout(
          'dependency',
          2,
          structuredClone(updates[0]!.positions),
        ),
      });
      await Promise.resolve();
    });

    await waitFor(() => expect(updates).toHaveLength(2));
    expect(updates.map(({ expectedRevision }) => expectedRevision)).toEqual([
      1, 2,
    ]);
    expect(updates[1]?.positions[0]?.x).toBe(299);
    await waitFor(() => expect(result.current.saving).toBe(false));
  });

  it('drops manual intents queued behind a CAS conflict', async () => {
    const resourceA = resource('resource-a');
    let updateCalls = 0;
    let resolveUpdate:
      | ((result: {
          status: 'conflict';
          layout: ProjectResourceCanvasLayout;
        }) => void)
      | null = null;
    const invoke = vi.fn(async (command: string) => {
      if (command === 'read_local_project_resource_canvas_layout') {
        return persistedLayout('dependency', 1, [
          position('resource-a', 10, 20),
        ]);
      }
      if (command === 'update_local_project_resource_canvas_layout') {
        updateCalls += 1;
        return await new Promise((resolve) => {
          resolveUpdate = resolve;
        });
      }
      throw new Error(`unexpected invoke ${command}`);
    });
    window.__TAURI__ = { core: { invoke } };
    const { result } = renderHook(() =>
      useProjectResourceCanvasLayout({
        projectPath,
        projectId,
        mode: 'dependency',
        resources: [resourceA],
      }),
    );
    await waitFor(() => expect(result.current.layout.positions[0]?.x).toBe(10));

    act(() => {
      result.current.commitPosition('resource-a', 'document', 100, 30);
      result.current.commitPosition('resource-a', 'document', 220, 40);
    });
    await waitFor(() => expect(updateCalls).toBe(1));
    await act(async () => {
      resolveUpdate?.({
        status: 'conflict',
        layout: persistedLayout('dependency', 2, [
          position('resource-a', 400, 80),
        ]),
      });
      await Promise.resolve();
    });

    await waitFor(() => {
      expect(result.current.layout.positions[0]).toMatchObject({
        x: 400,
        y: 80,
      });
      expect(result.current.saving).toBe(false);
    });
    expect(result.current.notice).toBe('布局已在其他窗口更新');
    expect(updateCalls).toBe(1);
  });

  it('keeps the manual conflict notice when resource reconciliation drops a queued manual intent and retries', async () => {
    const resourceA = resource('resource-a');
    const resourceB = resource('resource-b');
    const updates: Array<{
      expectedRevision: number;
      positions: ProjectResourceCanvasPosition[];
    }> = [];
    let resolveResourceSync:
      | ((result: {
          status: 'conflict';
          layout: ProjectResourceCanvasLayout;
        }) => void)
      | null = null;
    const invoke = vi.fn(
      async (command: string, args?: Record<string, unknown>) => {
        if (command === 'read_local_project_resource_canvas_layout') {
          return persistedLayout('dependency', 1, [
            position('resource-a', 10, 20),
          ]);
        }
        if (command === 'update_local_project_resource_canvas_layout') {
          const input = args as {
            expectedRevision: number;
            positions: ProjectResourceCanvasPosition[];
          };
          updates.push(structuredClone(input));
          if (updates.length === 1) {
            return await new Promise((resolve) => {
              resolveResourceSync = resolve;
            });
          }
          return {
            status: 'updated',
            layout: persistedLayout(
              'dependency',
              input.expectedRevision + 1,
              structuredClone(input.positions),
            ),
          };
        }
        throw new Error(`unexpected invoke ${command}`);
      },
    );
    window.__TAURI__ = { core: { invoke } };
    const setTimeoutSpy = vi.spyOn(window, 'setTimeout');
    const { result } = renderHook(() =>
      useProjectResourceCanvasLayout({
        projectPath,
        projectId,
        mode: 'dependency',
        resources: [resourceA, resourceB],
      }),
    );
    await waitFor(() => expect(updates).toHaveLength(1));

    act(() => result.current.commitPosition('resource-a', 'document', 100, 30));
    expect(result.current.layout.positions).toEqual(
      expect.arrayContaining([
        expect.objectContaining({ resourceId: 'resource-a', x: 100, y: 30 }),
      ]),
    );
    expect(updates).toHaveLength(1);

    await act(async () => {
      resolveResourceSync?.({
        status: 'conflict',
        layout: persistedLayout('dependency', 2, [
          position('resource-a', 400, 80),
        ]),
      });
      await Promise.resolve();
    });

    await waitFor(() => expect(updates).toHaveLength(2));
    await waitFor(() => expect(result.current.saving).toBe(false));
    expect(updates.map(({ expectedRevision }) => expectedRevision)).toEqual([
      1, 2,
    ]);
    expect(updates[1]?.positions).toEqual(
      expect.arrayContaining([
        expect.objectContaining({ resourceId: 'resource-a', x: 400, y: 80 }),
        expect.objectContaining({ resourceId: 'resource-b' }),
      ]),
    );
    expect(updates[1]?.positions).not.toEqual(
      expect.arrayContaining([
        expect.objectContaining({ resourceId: 'resource-a', x: 100, y: 30 }),
      ]),
    );
    expect(result.current.layout.positions).toEqual(
      expect.arrayContaining([
        expect.objectContaining({ resourceId: 'resource-a', x: 400, y: 80 }),
      ]),
    );
    expect(result.current.notice).toBe('布局已在其他窗口更新');
    expect(setTimeoutSpy.mock.calls.some(([, delay]) => delay === 2400)).toBe(
      false,
    );

    act(() => result.current.commitPosition('resource-a', 'document', 500, 90));
    await waitFor(() => expect(updates).toHaveLength(3));
    await waitFor(() => expect(result.current.notice).toBe('布局已保存'));
    expect(setTimeoutSpy.mock.calls.some(([, delay]) => delay === 2400)).toBe(
      true,
    );
    expect(updates[2]?.expectedRevision).toBe(3);
    expect(updates[2]?.positions).toEqual(
      expect.arrayContaining([
        expect.objectContaining({ resourceId: 'resource-a', x: 500, y: 90 }),
      ]),
    );
  });

  it('ignores a late read from the previous mode', async () => {
    const resourceA = resource('resource-a');
    const readResolvers = new Map<
      ProjectResourceCanvasLayoutMode,
      (layout: ProjectResourceCanvasLayout) => void
    >();
    const invoke = vi.fn(
      async (command: string, args?: Record<string, unknown>) => {
        if (command !== 'read_local_project_resource_canvas_layout') {
          throw new Error(`unexpected invoke ${command}`);
        }
        const mode = args?.mode as ProjectResourceCanvasLayoutMode;
        return await new Promise<ProjectResourceCanvasLayout>((resolve) => {
          readResolvers.set(mode, resolve);
        });
      },
    );
    window.__TAURI__ = { core: { invoke } };
    const { result, rerender } = renderHook(
      ({ mode }: { mode: ProjectResourceCanvasLayoutMode }) =>
        useProjectResourceCanvasLayout({
          projectPath,
          projectId,
          mode,
          resources: [resourceA],
        }),
      { initialProps: { mode: 'dependency' as const } },
    );
    await waitFor(() => expect(readResolvers.has('dependency')).toBe(true));
    rerender({ mode: 'type' });
    await waitFor(() => expect(readResolvers.has('type')).toBe(true));

    await act(async () => {
      readResolvers.get('type')?.(
        persistedLayout('type', 5, [position('resource-a', 200, 50)]),
      );
      await Promise.resolve();
    });
    await waitFor(() => expect(result.current.layout.mode).toBe('type'));
    await act(async () => {
      readResolvers.get('dependency')?.(
        persistedLayout('dependency', 4, [position('resource-a', 10, 20)]),
      );
      await Promise.resolve();
    });

    expect(result.current.layout.mode).toBe('type');
    expect(result.current.layout.positions[0]).toMatchObject({ x: 200, y: 50 });
  });

  it('does not let a stuck old-scope write block the new scope queue', async () => {
    const resourceA = resource('resource-a');
    const updates: Array<{
      mode: ProjectResourceCanvasLayoutMode;
      expectedRevision: number;
    }> = [];
    let resolveDependencyUpdate:
      | ((result: {
          status: 'updated';
          layout: ProjectResourceCanvasLayout;
        }) => void)
      | null = null;
    const invoke = vi.fn(
      async (command: string, args?: Record<string, unknown>) => {
        const mode = args?.mode as ProjectResourceCanvasLayoutMode;
        if (command === 'read_local_project_resource_canvas_layout') {
          return persistedLayout(mode, mode === 'dependency' ? 1 : 5, [
            position('resource-a', mode === 'dependency' ? 10 : 200, 20),
          ]);
        }
        if (command === 'update_local_project_resource_canvas_layout') {
          const expectedRevision = args?.expectedRevision as number;
          updates.push({ mode, expectedRevision });
          if (mode === 'dependency') {
            return await new Promise((resolve) => {
              resolveDependencyUpdate = resolve;
            });
          }
          return {
            status: 'updated',
            layout: persistedLayout(mode, expectedRevision + 1, [
              position('resource-a', 300, 40),
            ]),
          };
        }
        throw new Error(`unexpected invoke ${command}`);
      },
    );
    window.__TAURI__ = { core: { invoke } };
    const { result, rerender } = renderHook(
      ({ mode }: { mode: ProjectResourceCanvasLayoutMode }) =>
        useProjectResourceCanvasLayout({
          projectPath,
          projectId,
          mode,
          resources: [resourceA],
        }),
      { initialProps: { mode: 'dependency' as const } },
    );
    await waitFor(() => expect(result.current.layout.positions[0]?.x).toBe(10));

    act(() => result.current.commitPosition('resource-a', 'document', 100, 30));
    await waitFor(() => expect(updates).toHaveLength(1));
    rerender({ mode: 'type' });
    await waitFor(() => expect(result.current.layout.mode).toBe('type'));
    act(() => result.current.commitPosition('resource-a', 'document', 300, 40));
    await waitFor(() => expect(updates).toHaveLength(2));
    expect(updates[1]).toEqual({ mode: 'type', expectedRevision: 5 });
    await waitFor(() => expect(result.current.saving).toBe(false));
    expect(result.current.layout.mode).toBe('type');
    expect(result.current.layout.positions[0]?.x).toBe(300);

    await act(async () => {
      resolveDependencyUpdate?.({
        status: 'updated',
        layout: persistedLayout('dependency', 2, [
          position('resource-a', 100, 30),
        ]),
      });
      await Promise.resolve();
    });

    expect(updates).toHaveLength(2);
    expect(result.current.layout.mode).toBe('type');
    expect(result.current.layout.positions[0]?.x).toBe(300);
  });

  it('bounds automatic resource reconciliation retries under repeated CAS conflicts', async () => {
    const resourceA = resource('resource-a');
    const resourceB = resource('resource-b');
    const expectedRevisions: number[] = [];
    const invoke = vi.fn(
      async (command: string, args?: Record<string, unknown>) => {
        if (command === 'read_local_project_resource_canvas_layout') {
          return persistedLayout('dependency', 1, [
            position('resource-a', 10, 20),
          ]);
        }
        if (command === 'update_local_project_resource_canvas_layout') {
          const expectedRevision = args?.expectedRevision as number;
          expectedRevisions.push(expectedRevision);
          return {
            status: 'conflict',
            layout: persistedLayout('dependency', expectedRevision + 1, [
              position('resource-a', 10, 20),
            ]),
          };
        }
        throw new Error(`unexpected invoke ${command}`);
      },
    );
    window.__TAURI__ = { core: { invoke } };
    const { result } = renderHook(() =>
      useProjectResourceCanvasLayout({
        projectPath,
        projectId,
        mode: 'dependency',
        resources: [resourceA, resourceB],
      }),
    );

    await waitFor(() => expect(expectedRevisions).toHaveLength(3));
    await waitFor(() => expect(result.current.saving).toBe(false));
    expect(expectedRevisions).toEqual([1, 2, 3]);
    expect(result.current.notice).toBe('布局已在其他窗口更新');
    expect(
      result.current.layout.positions.some(
        ({ resourceId }) => resourceId === 'resource-b',
      ),
    ).toBe(true);
  });
});