// @vitest-environment node

import { beforeEach, describe, expect, it, vi } from 'vitest';

const mocks = vi.hoisted(() => {
  let gatewayEventHandler: ((event: any) => void | Promise<void>) | null = null;

  return {
    gatewayRpc: vi.fn(),
    hostApiFetch: vi.fn(),
    onGatewayEvent: vi.fn((callback: (event: any) => void | Promise<void>) => {
      gatewayEventHandler = callback;
      return () => {
        gatewayEventHandler = null;
      };
    }),
    emitGatewayEvent: async (event: any) => {
      await gatewayEventHandler?.(event);
    },
  };
});

vi.mock('../src/lib/gateway-client', () => ({
  gatewayRpc: mocks.gatewayRpc,
  onGatewayEvent: mocks.onGatewayEvent,
}));

vi.mock('../src/lib/host-api', () => ({
  hostApiFetch: mocks.hostApiFetch,
}));

vi.mock('../src/stores/agents', () => ({
  agentsStore: {
    init: vi.fn(async () => undefined),
    resolveMainSessionKey: vi.fn(() => 'agent:test:main'),
    getState: vi.fn(() => ({
      defaultAgentId: 'test',
      defaultProviderAccountId: null,
    })),
    getAgentById: vi.fn(() => undefined),
  },
}));

describe('chat store runtime refresh', () => {
  beforeEach(() => {
    vi.resetModules();
    vi.clearAllMocks();

    mocks.gatewayRpc.mockImplementation(async (method: string) => {
      if (method === 'session.list') {
        return ['agent:test:main'];
      }

      if (method === 'chat.history') {
        return [];
      }

      throw new Error(`Unexpected RPC method: ${method}`);
    });

    mocks.hostApiFetch.mockResolvedValue({
      messages: [],
    });
  });

  it('reloads current history when skills runtime changes', async () => {
    const { chatStore } = await import('../src/stores/chat');

    await chatStore.init();

    const initialHistoryCalls = mocks.gatewayRpc.mock.calls.filter(
      ([method]) => method === 'chat.history',
    ).length;

    await mocks.emitGatewayEvent({
      type: 'runtime:changed',
      topics: ['skills'],
      syncedAt: new Date().toISOString(),
    });

    const afterRefreshHistoryCalls = mocks.gatewayRpc.mock.calls.filter(
      ([method]) => method === 'chat.history',
    ).length;

    expect(afterRefreshHistoryCalls).toBe(initialHistoryCalls + 1);
  });
});