/**
 * IssueTable Component Tests
 */

import { render, screen } from '@testing-library/react';
import userEvent from '@testing-library/user-event';
import { IssueTable } from '@/features/issues/components/IssueTable';
import type { IssueSummary, IssueSort } from '@/features/issues/types';

const mockIssues: IssueSummary[] = [
  {
    id: 'issue-1',
    number: 42,
    type: 'bug',
    title: 'Test Issue 1',
    description: 'Description 1',
    status: 'open',
    priority: 'high',
    labels: ['bug', 'frontend'],
    sprint: 'Sprint 1',
    assignee: { id: 'user-1', name: 'Test User', type: 'human' },
    created_at: '2025-01-01T00:00:00Z',
    updated_at: '2025-01-02T00:00:00Z',
    sync_status: 'synced',
  },
  {
    id: 'issue-2',
    number: 43,
    type: 'story',
    title: 'Test Issue 2',
    description: 'Description 2',
    status: 'in_progress',
    priority: 'medium',
    labels: ['feature'],
    sprint: null,
    assignee: null,
    created_at: '2025-01-02T00:00:00Z',
    updated_at: '2025-01-03T00:00:00Z',
    sync_status: 'pending',
  },
];

describe('IssueTable', () => {
  const defaultSort: IssueSort = { field: 'number', direction: 'asc' };
  const mockOnSelectionChange = jest.fn();
  const mockOnIssueClick = jest.fn();
  const mockOnSortChange = jest.fn();

  beforeEach(() => {
    mockOnSelectionChange.mockClear();
    mockOnIssueClick.mockClear();
    mockOnSortChange.mockClear();
  });

  it('renders issue rows', () => {
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    expect(screen.getByText('Test Issue 1')).toBeInTheDocument();
    expect(screen.getByText('Test Issue 2')).toBeInTheDocument();
  });

  it('displays issue numbers', () => {
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    expect(screen.getByText('42')).toBeInTheDocument();
    expect(screen.getByText('43')).toBeInTheDocument();
  });

  it('shows labels for issues', () => {
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    expect(screen.getByText('bug')).toBeInTheDocument();
    expect(screen.getByText('frontend')).toBeInTheDocument();
    expect(screen.getByText('feature')).toBeInTheDocument();
  });

  it('calls onIssueClick when row is clicked', async () => {
    const user = userEvent.setup();
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    const row = screen.getByTestId('issue-row-issue-1');
    await user.click(row);

    expect(mockOnIssueClick).toHaveBeenCalledWith('issue-1');
  });

  it('handles issue selection', async () => {
    const user = userEvent.setup();
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    // Find checkbox for first issue
    const checkbox = screen.getByRole('checkbox', { name: /select issue 42/i });
    await user.click(checkbox);

    expect(mockOnSelectionChange).toHaveBeenCalledWith(['issue-1']);
  });

  it('handles select all', async () => {
    const user = userEvent.setup();
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    // Find select all checkbox
    const selectAllCheckbox = screen.getByRole('checkbox', { name: /select all issues/i });
    await user.click(selectAllCheckbox);

    expect(mockOnSelectionChange).toHaveBeenCalledWith(['issue-1', 'issue-2']);
  });

  it('handles deselect all when all selected', async () => {
    const user = userEvent.setup();
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={['issue-1', 'issue-2']}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    // Find deselect all checkbox
    const selectAllCheckbox = screen.getByRole('checkbox', { name: /deselect all issues/i });
    await user.click(selectAllCheckbox);

    expect(mockOnSelectionChange).toHaveBeenCalledWith([]);
  });

  it('handles sorting by number', async () => {
    const user = userEvent.setup();
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    // Click the # column header
    const numberHeader = screen.getByRole('button', { name: /#/i });
    await user.click(numberHeader);

    expect(mockOnSortChange).toHaveBeenCalled();
  });

  it('handles sorting by priority', async () => {
    const user = userEvent.setup();
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    // Click the Priority column header
    const priorityHeader = screen.getByRole('button', { name: /priority/i });
    await user.click(priorityHeader);

    expect(mockOnSortChange).toHaveBeenCalledWith({ field: 'priority', direction: 'desc' });
  });

  it('shows empty state when no issues', () => {
    render(
      <IssueTable
        issues={[]}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    expect(screen.getByText('No issues found')).toBeInTheDocument();
    expect(screen.getByText('Try adjusting your search or filters')).toBeInTheDocument();
  });

  it('shows unassigned text for issues without assignee', () => {
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    expect(screen.getByText('Unassigned')).toBeInTheDocument();
  });

  it('shows backlog text for issues without sprint', () => {
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    expect(screen.getByText('Backlog')).toBeInTheDocument();
  });

  it('deselects issue when clicking selected checkbox', async () => {
    const user = userEvent.setup();
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={['issue-1']}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    // Find checkbox for first issue (already selected)
    const checkbox = screen.getByRole('checkbox', { name: /select issue 42/i });
    await user.click(checkbox);

    expect(mockOnSelectionChange).toHaveBeenCalledWith([]);
  });

  it('handles keyboard navigation for number column sorting', async () => {
    const user = userEvent.setup();
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    // Find the # column header and press Enter
    const numberHeader = screen.getByRole('button', { name: /#/i });
    numberHeader.focus();
    await user.keyboard('{Enter}');

    expect(mockOnSortChange).toHaveBeenCalled();
  });

  it('handles keyboard navigation for priority column sorting', async () => {
    const user = userEvent.setup();
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    // Find the Priority column header and press Enter
    const priorityHeader = screen.getByRole('button', { name: /priority/i });
    priorityHeader.focus();
    await user.keyboard('{Enter}');

    expect(mockOnSortChange).toHaveBeenCalledWith({ field: 'priority', direction: 'desc' });
  });

  it('toggles sort direction when clicking same column', async () => {
    const user = userEvent.setup();
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={{ field: 'number', direction: 'asc' }}
        onSortChange={mockOnSortChange}
      />
    );

    // Click number header (currently sorted asc)
    const numberHeader = screen.getByRole('button', { name: /#/i });
    await user.click(numberHeader);

    // Should toggle to desc
    expect(mockOnSortChange).toHaveBeenCalledWith({ field: 'number', direction: 'desc' });
  });

  it('shows agent icon for agent assignee', () => {
    const issueWithAgentAssignee: IssueSummary[] = [
      {
        id: 'issue-1',
        number: 42,
        type: 'bug',
        title: 'Test Issue',
        description: 'Description',
        status: 'open',
        priority: 'high',
        labels: [],
        sprint: null,
        assignee: { id: 'agent-1', name: 'Test Agent', type: 'agent' },
        created_at: '2025-01-01T00:00:00Z',
        updated_at: '2025-01-02T00:00:00Z',
        sync_status: 'synced',
      },
    ];

    render(
      <IssueTable
        issues={issueWithAgentAssignee}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    // Check that agent name is displayed
    expect(screen.getByText('Test Agent')).toBeInTheDocument();
  });

  it('truncates labels when more than 3', () => {
    const issueWithManyLabels: IssueSummary[] = [
      {
        id: 'issue-1',
        number: 42,
        type: 'bug',
        title: 'Test Issue',
        description: 'Description',
        status: 'open',
        priority: 'high',
        labels: ['label1', 'label2', 'label3', 'label4', 'label5'],
        sprint: null,
        assignee: null,
        created_at: '2025-01-01T00:00:00Z',
        updated_at: '2025-01-02T00:00:00Z',
        sync_status: 'synced',
      },
    ];

    render(
      <IssueTable
        issues={issueWithManyLabels}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    // First 3 labels should be shown
    expect(screen.getByText('label1')).toBeInTheDocument();
    expect(screen.getByText('label2')).toBeInTheDocument();
    expect(screen.getByText('label3')).toBeInTheDocument();

    // +2 badge should be shown
    expect(screen.getByText('+2')).toBeInTheDocument();
  });

  it('displays actions dropdown menu', async () => {
    const user = userEvent.setup();
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    // Find and click the actions button
    const actionsButton = screen.getByRole('button', { name: /actions for issue 42/i });
    await user.click(actionsButton);

    // Dropdown menu items should be visible
    expect(screen.getByRole('menuitem', { name: /view details/i })).toBeInTheDocument();
    expect(screen.getByRole('menuitem', { name: /edit/i })).toBeInTheDocument();
    expect(screen.getByRole('menuitem', { name: /assign/i })).toBeInTheDocument();
    expect(screen.getByRole('menuitem', { name: /sync with tracker/i })).toBeInTheDocument();
    expect(screen.getByRole('menuitem', { name: /delete/i })).toBeInTheDocument();
  });

  it('does not trigger row click when clicking actions menu', async () => {
    const user = userEvent.setup();
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    // Find and click the actions button
    const actionsButton = screen.getByRole('button', { name: /actions for issue 42/i });
    await user.click(actionsButton);

    // Row click should not be triggered
    expect(mockOnIssueClick).not.toHaveBeenCalled();
  });

  it('calls onIssueClick when View Details is clicked from menu', async () => {
    const user = userEvent.setup();
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
      />
    );

    // Open the actions menu
    const actionsButton = screen.getByRole('button', { name: /actions for issue 42/i });
    await user.click(actionsButton);

    // Click View Details
    const viewDetailsItem = screen.getByRole('menuitem', { name: /view details/i });
    await user.click(viewDetailsItem);

    expect(mockOnIssueClick).toHaveBeenCalledWith('issue-1');
  });

  it('shows descending sort icon when sorted descending', () => {
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={{ field: 'number', direction: 'desc' }}
        onSortChange={mockOnSortChange}
      />
    );

    // The column header should have aria-sort="descending"
    const numberHeader = screen.getByRole('button', { name: /#/i });
    expect(numberHeader).toHaveAttribute('aria-sort', 'descending');
  });

  it('shows ascending sort icon when sorted ascending', () => {
    render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={{ field: 'number', direction: 'asc' }}
        onSortChange={mockOnSortChange}
      />
    );

    // The column header should have aria-sort="ascending"
    const numberHeader = screen.getByRole('button', { name: /#/i });
    expect(numberHeader).toHaveAttribute('aria-sort', 'ascending');
  });

  it('applies custom className', () => {
    const { container } = render(
      <IssueTable
        issues={mockIssues}
        selectedIssues={[]}
        onSelectionChange={mockOnSelectionChange}
        onIssueClick={mockOnIssueClick}
        sort={defaultSort}
        onSortChange={mockOnSortChange}
        className="custom-class"
      />
    );

    expect(container.firstChild).toHaveClass('custom-class');
  });
});