import { describe, expect, it, vi } from 'vitest';
import { createCodingPluginsStore } from '@/stores/coding-plugins';

function projection(enabled = false, projectId = 'local-project') {
  return {
    schemaVersion: 1 as const,
    project: { localProjectId: projectId, durableProjectId: null },
    policyStatus: 'current' as const,
    items: [{
      id: 'makelore.data-service', version: '1.0.0', displayName: '开发数据服务', description: '项目数据',
      enabled, state: enabled ? 'configuration_required' as const : 'disabled' as const,
      backend: { status: 'unconfigured' as const }, skills: [{ id: 'data-service', assignedAgentIds: [] }],
      capabilities: [], settingsSurface: 'data-service',
    }],
  };
}

describe('coding plugins store', () => {
  it('coalesces duplicate loads and mutations while retaining the last projection on failure', async () => {
    let resolveLoad!: (value: ReturnType<typeof projection>) => void;
    const list = vi.fn(() => new Promise<ReturnType<typeof projection>>((resolve) => { resolveLoad = resolve; }));
    const setEnabled = vi.fn().mockResolvedValue(projection(true));
    const store = createCodingPluginsStore({ list, setEnabled });

    const first = store.getState().load('local-project');
    const second = store.getState().load('local-project');
    resolveLoad(projection());
    await Promise.all([first, second]);
    expect(list).toHaveBeenCalledOnce();

    await Promise.all([
      store.getState().setEnabled('local-project', 'makelore.data-service', true),
      store.getState().setEnabled('local-project', 'makelore.data-service', true),
    ]);
    expect(setEnabled).toHaveBeenCalledOnce();
    expect(store.getState().projection?.items[0].enabled).toBe(true);

    list.mockRejectedValueOnce(new Error('offline'));
    await expect(store.getState().load('other-project')).rejects.toThrow('offline');
    expect(store.getState().projection?.project.localProjectId).toBe('local-project');
    expect(store.getState().loadState).toBe('error');
  });

  it('clears project-scoped Data Service data when another project loads', async () => {
    const store = createCodingPluginsStore({ list: vi.fn().mockResolvedValue(projection(false, 'other-project')) });
    store.setState({
      projectId: 'local-project',
      dataService: {
        instance_id: 'instance-1', project_id: 'cloud-project', collections: [],
        usage: { document_count: 0, total_bytes: 0 },
        limits: { max_collections: 20, max_documents: 1000, max_total_bytes: 20971520, max_document_bytes: 65536, list_default_limit: 50, list_max_limit: 100, list_max_data_bytes: 1048576, mutations_per_minute: 120 },
        created_at: '2026-08-27T00:00:00Z', updated_at: '2026-08-27T00:00:00Z',
      },
    });
    await store.getState().load('other-project');
    expect(store.getState().dataService).toBeNull();
  });

  it('commits only the latest project load success or error', async () => {
    const pending = new Map<string, {
      resolve: (value: ReturnType<typeof projection>) => void;
      reject: (reason: Error) => void;
    }>();
    const list = vi.fn((projectId: string) => new Promise<ReturnType<typeof projection>>((resolve, reject) => {
      pending.set(projectId, { resolve, reject });
    }));
    const store = createCodingPluginsStore({ list });

    const first = store.getState().load('project-a');
    const second = store.getState().load('project-b');
    pending.get('project-b')?.resolve(projection(false, 'project-b'));
    await second;
    pending.get('project-a')?.resolve(projection(false, 'project-a'));
    await first;
    expect(store.getState()).toMatchObject({
      projectId: 'project-b', loadState: 'ready', error: null,
    });

    const third = store.getState().load('project-a');
    const fourth = store.getState().load('project-b');
    pending.get('project-b')?.resolve(projection(false, 'project-b'));
    await fourth;
    pending.get('project-a')?.reject(new Error('late project-a failure'));
    await expect(third).rejects.toThrow('late project-a failure');
    expect(store.getState()).toMatchObject({
      projectId: 'project-b', loadState: 'ready', error: null,
    });
  });

  it('retains ready Data Service usage when enabling an existing instance', async () => {
    const readyProjection = projection(true);
    readyProjection.items[0] = {
      ...readyProjection.items[0], state: 'ready', backend: { status: 'ready' },
    };
    const existing = {
      instance_id: 'instance-1', project_id: 'cloud-project', collections: ['todos'],
      usage: { document_count: 3, total_bytes: 128 },
      limits: { max_collections: 20, max_documents: 1000, max_total_bytes: 20971520, max_document_bytes: 65536, list_default_limit: 50, list_max_limit: 100, list_max_data_bytes: 1048576, mutations_per_minute: 120 },
      created_at: '2026-08-27T00:00:00Z', updated_at: '2026-08-27T00:00:00Z',
    };
    const inspectDataService = vi.fn().mockResolvedValue({
      success: true, status: 200, code: null, error: null, retryable: false, data: existing,
    });
    const store = createCodingPluginsStore({
      setEnabled: vi.fn().mockResolvedValue(readyProjection), inspectDataService,
    });

    await store.getState().setEnabled('local-project', 'makelore.data-service', true);

    expect(inspectDataService).toHaveBeenCalledOnce();
    expect(store.getState().dataService).toEqual(existing);
    expect(store.getState().projection).toEqual(readyProjection);
  });
});