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

const {
  parseJsonBodyMock,
  readDocumentsMock,
  resetDocumentMock,
  saveDocumentMock,
  sendJsonMock,
} = vi.hoisted(() => ({
  parseJsonBodyMock: vi.fn(),
  readDocumentsMock: vi.fn(),
  resetDocumentMock: vi.fn(),
  saveDocumentMock: vi.fn(),
  sendJsonMock: vi.fn(),
}));

vi.mock('@electron/utils/agent-system-documents', () => ({
  isAgentSystemDocumentKind: (kind: string) => ['soul', 'identity', 'user', 'agent', 'tool', 'heartbeat', 'boot'].includes(kind),
  readAgentSystemDocuments: readDocumentsMock,
  resetAgentSystemDocument: resetDocumentMock,
  saveAgentSystemDocument: saveDocumentMock,
}));

vi.mock('@electron/api/route-utils', () => ({
  parseJsonBody: parseJsonBodyMock,
  sendJson: sendJsonMock,
}));

function createContext(state: 'running' | 'stopped' = 'running') {
  return {
    gatewayManager: {
      getStatus: vi.fn(() => ({ state })),
      debouncedReload: vi.fn(),
    },
  };
}

describe('agent system document routes', () => {
  beforeEach(() => {
    vi.clearAllMocks();
    readDocumentsMock.mockResolvedValue({ success: true, selectedAgentId: 'main', documents: [] });
    saveDocumentMock.mockResolvedValue({ success: true, selectedAgentId: 'main', documents: [] });
    resetDocumentMock.mockResolvedValue({ success: true, selectedAgentId: 'main', documents: [] });
  });

  it('lists documents for the requested agent', async () => {
    const { handleAgentSystemDocumentRoutes } = await import('@electron/api/routes/agent-system-documents');
    const ctx = createContext();

    const handled = await handleAgentSystemDocumentRoutes(
      { method: 'GET' } as never,
      {} as never,
      new URL('http://127.0.0.1/api/agent-system-documents?agentId=coder'),
      ctx as never,
    );

    expect(handled).toBe(true);
    expect(readDocumentsMock).toHaveBeenCalledWith('coder');
    expect(sendJsonMock).toHaveBeenCalledWith(expect.anything(), 200, {
      success: true,
      selectedAgentId: 'main',
      documents: [],
    });
    expect(ctx.gatewayManager.debouncedReload).not.toHaveBeenCalled();
  });

  it('saves a document and schedules a gateway reload when running', async () => {
    parseJsonBodyMock.mockResolvedValue({ agentId: 'main', content: '# Heartbeat\n' });
    const { handleAgentSystemDocumentRoutes } = await import('@electron/api/routes/agent-system-documents');
    const ctx = createContext('running');

    const handled = await handleAgentSystemDocumentRoutes(
      { method: 'PUT' } as never,
      {} as never,
      new URL('http://127.0.0.1/api/agent-system-documents/heartbeat'),
      ctx as never,
    );

    expect(handled).toBe(true);
    expect(saveDocumentMock).toHaveBeenCalledWith('main', 'heartbeat', '# Heartbeat\n');
    expect(ctx.gatewayManager.debouncedReload).toHaveBeenCalledTimes(1);
  });

  it('restores a document from template without reloading a stopped gateway', async () => {
    parseJsonBodyMock.mockResolvedValue({ agentId: 'main' });
    const { handleAgentSystemDocumentRoutes } = await import('@electron/api/routes/agent-system-documents');
    const ctx = createContext('stopped');

    const handled = await handleAgentSystemDocumentRoutes(
      { method: 'POST' } as never,
      {} as never,
      new URL('http://127.0.0.1/api/agent-system-documents/tool/reset'),
      ctx as never,
    );

    expect(handled).toBe(true);
    expect(resetDocumentMock).toHaveBeenCalledWith('main', 'tool');
    expect(ctx.gatewayManager.debouncedReload).not.toHaveBeenCalled();
  });

  it('rejects unsupported document kinds', async () => {
    const { handleAgentSystemDocumentRoutes } = await import('@electron/api/routes/agent-system-documents');

    const handled = await handleAgentSystemDocumentRoutes(
      { method: 'PUT' } as never,
      {} as never,
      new URL('http://127.0.0.1/api/agent-system-documents/memory'),
      createContext() as never,
    );

    expect(handled).toBe(true);
    expect(sendJsonMock).toHaveBeenCalledWith(expect.anything(), 404, {
      success: false,
      error: 'Unsupported system document kind "memory"',
    });
  });
});