import { render, screen } from '@testing-library/react';
import userEvent from '@testing-library/user-event';
import { RecentActivity } from '@/components/projects/RecentActivity';
import type { ActivityItem } from '@/components/projects/types';

const mockActivities: ActivityItem[] = [
  {
    id: 'act-001',
    type: 'agent_message',
    agent: 'Product Owner',
    message: 'Approved user story #42',
    timestamp: new Date().toISOString(),
  },
  {
    id: 'act-002',
    type: 'issue_update',
    agent: 'Backend Engineer',
    message: 'Moved issue #38 to review',
    timestamp: new Date().toISOString(),
  },
  {
    id: 'act-003',
    type: 'approval_request',
    agent: 'Architect',
    message: 'Requesting API design approval',
    timestamp: new Date().toISOString(),
    requires_action: true,
  },
];

describe('RecentActivity', () => {
  it('renders recent activity with title', () => {
    render(<RecentActivity activities={mockActivities} />);
    expect(screen.getByText('Recent Activity')).toBeInTheDocument();
  });

  it('displays all activities', () => {
    render(<RecentActivity activities={mockActivities} />);
    expect(screen.getByText('Product Owner')).toBeInTheDocument();
    expect(screen.getByText('Approved user story #42')).toBeInTheDocument();

    expect(screen.getByText('Backend Engineer')).toBeInTheDocument();
    expect(screen.getByText('Moved issue #38 to review')).toBeInTheDocument();

    expect(screen.getByText('Architect')).toBeInTheDocument();
    expect(screen.getByText('Requesting API design approval')).toBeInTheDocument();
  });

  it('renders empty state when no activities', () => {
    render(<RecentActivity activities={[]} />);
    expect(screen.getByText('No recent activity')).toBeInTheDocument();
  });

  it('shows loading skeleton when isLoading is true', () => {
    const { container } = render(<RecentActivity activities={[]} isLoading />);
    expect(container.querySelectorAll('.animate-pulse').length).toBeGreaterThan(0);
  });

  it('respects maxItems prop', () => {
    render(<RecentActivity activities={mockActivities} maxItems={2} />);
    expect(screen.getByText('Product Owner')).toBeInTheDocument();
    expect(screen.getByText('Backend Engineer')).toBeInTheDocument();
    expect(screen.queryByText('Architect')).not.toBeInTheDocument();
  });

  it('shows View All button when there are more activities than maxItems', () => {
    const onViewAll = jest.fn();
    render(<RecentActivity activities={mockActivities} maxItems={2} onViewAll={onViewAll} />);
    expect(screen.getByRole('button', { name: /view all/i })).toBeInTheDocument();
  });

  it('does not show View All button when all activities are shown', () => {
    const onViewAll = jest.fn();
    render(<RecentActivity activities={mockActivities} maxItems={5} onViewAll={onViewAll} />);
    expect(screen.queryByRole('button', { name: /view all/i })).not.toBeInTheDocument();
  });

  it('calls onViewAll when View All button is clicked', async () => {
    const user = userEvent.setup();
    const onViewAll = jest.fn();
    render(<RecentActivity activities={mockActivities} maxItems={2} onViewAll={onViewAll} />);

    await user.click(screen.getByRole('button', { name: /view all/i }));
    expect(onViewAll).toHaveBeenCalledTimes(1);
  });

  it('shows Review Request button for items requiring action', () => {
    const onActionClick = jest.fn();
    render(<RecentActivity activities={mockActivities} onActionClick={onActionClick} />);
    expect(screen.getByRole('button', { name: /review request/i })).toBeInTheDocument();
  });

  it('calls onActionClick when Review Request button is clicked', async () => {
    const user = userEvent.setup();
    const onActionClick = jest.fn();
    render(<RecentActivity activities={mockActivities} onActionClick={onActionClick} />);

    await user.click(screen.getByRole('button', { name: /review request/i }));
    expect(onActionClick).toHaveBeenCalledWith('act-003');
  });

  it('highlights activities requiring action', () => {
    render(<RecentActivity activities={mockActivities} />);

    const activityItem = screen.getByTestId('activity-item-act-003');
    const iconContainer = activityItem.querySelector('.bg-yellow-100');
    expect(iconContainer).toBeInTheDocument();
  });

  it('applies custom className', () => {
    render(<RecentActivity activities={mockActivities} className="custom-class" />);
    expect(screen.getByTestId('recent-activity')).toHaveClass('custom-class');
  });

  it('has accessible list role', () => {
    render(<RecentActivity activities={mockActivities} />);
    expect(screen.getByRole('list', { name: /recent project activity/i })).toBeInTheDocument();
  });
});