import React from 'react';
import { render, screen, fireEvent } from '@testing-library/react';
import { vi, describe, it, expect, beforeEach } from 'vitest';
import InventoryTable from '@/components/InventoryTable';
import { Item } from '@/lib/db';

// Mock ItemDetailModal and PhotoModal
vi.mock('@/components/ItemDetailModal', () => ({
  default: ({ item, onClose }: any) => (
    <div data-testid="item-detail-modal">
      <p>{item.name}</p>
      <button onClick={onClose}>Close Detail</button>
    </div>
  ),
}));

vi.mock('@/components/PhotoModal', () => ({
  default: ({ photoUrl, title, onClose }: any) => (
    <div data-testid="photo-modal">
      <p>{title}</p>
      <img src={photoUrl} alt={title} />
      <button onClick={onClose}>Close Photo</button>
    </div>
  ),
}));

describe('InventoryTable - Photo Display', () => {
  const mockOnExpandCategory = vi.fn();
  const mockOnItemClick = vi.fn();

  const createMockItem = (overrides?: Partial<Item>): Item => ({
    id: 1,
    barcode: 'TEST-001',
    name: 'Test Item',
    category: 'Electronics',
    quantity: 10,
    min_quantity: 5,
    ...overrides,
  });

  beforeEach(() => {
    mockOnExpandCategory.mockClear();
    mockOnItemClick.mockClear();
  });

  describe('Photo Thumbnail Display', () => {
    it('should render photo thumbnail when image_url exists', () => {
      const items = [
        createMockItem({
          id: 1,
          name: 'Item with Photo',
          image_url: 'https://example.com/photo.jpg',
        }),
      ];

      render(
        <InventoryTable
          items={items}
          categories={['Electronics']}
          expandedCategory="Electronics"
          onExpandCategory={mockOnExpandCategory}
          onItemClick={mockOnItemClick}
        />
      );

      const thumbnail = screen.getByAltText('Item with Photo');
      expect(thumbnail).toBeInTheDocument();
      expect(thumbnail).toHaveAttribute('src', 'https://example.com/photo.jpg');
    });

    it('should render fallback icon when no image_url', () => {
      const items = [createMockItem({ id: 1, name: 'Item without Photo' })];

      render(
        <InventoryTable
          items={items}
          categories={['Electronics']}
          expandedCategory="Electronics"
          onExpandCategory={mockOnExpandCategory}
          onItemClick={mockOnItemClick}
        />
      );

      // Should not have image
      expect(screen.queryByAltText('Item without Photo')).not.toBeInTheDocument();

      // Should have "No photo" text
      expect(screen.getByText('No photo')).toBeInTheDocument();
    });

    it('should apply border styling to thumbnail', () => {
      const items = [
        createMockItem({
          id: 1,
          image_url: 'https://example.com/photo.jpg',
        }),
      ];

      const { container } = render(
        <InventoryTable
          items={items}
          categories={['Electronics']}
          expandedCategory="Electronics"
          onExpandCategory={mockOnExpandCategory}
          onItemClick={mockOnItemClick}
        />
      );

      // Find thumbnail container (parent of img)
      const thumbnail = screen.getByAltText('Test Item');
      expect(thumbnail.parentElement).toHaveClass(
        'border-2',
        'border-slate-300'
      );
    });

    it('should have proper dimensions for thumbnail', () => {
      const items = [
        createMockItem({
          id: 1,
          image_url: 'https://example.com/photo.jpg',
        }),
      ];

      const { container } = render(
        <InventoryTable
          items={items}
          categories={['Electronics']}
          expandedCategory="Electronics"
          onExpandCategory={mockOnExpandCategory}
          onItemClick={mockOnItemClick}
        />
      );

      const thumbnail = screen.getByAltText('Test Item');
      expect(thumbnail.parentElement).toHaveClass('w-12', 'h-12');
    });

    it('should show "Tap photo for details" hint when photo exists', () => {
      const items = [
        createMockItem({
          id: 1,
          image_url: 'https://example.com/photo.jpg',
        }),
      ];

      render(
        <InventoryTable
          items={items}
          categories={['Electronics']}
          expandedCategory="Electronics"
          onExpandCategory={mockOnExpandCategory}
          onItemClick={mockOnItemClick}
        />
      );

      expect(screen.getByText('Tap photo for details')).toBeInTheDocument();
    });

    it('should use lazy loading for thumbnail images', () => {
      const items = [
        createMockItem({
          id: 1,
          image_url: 'https://example.com/photo.jpg',
        }),
      ];

      render(
        <InventoryTable
          items={items}
          categories={['Electronics']}
          expandedCategory="Electronics"
          onExpandCategory={mockOnExpandCategory}
          onItemClick={mockOnItemClick}
        />
      );

      const thumbnail = screen.getByAltText('Test Item');
      expect(thumbnail).toHaveAttribute('loading', 'lazy');
    });
  });

  describe('Photo Modal Interaction', () => {
    it('should open PhotoModal when clicking thumbnail', () => {
      const items = [
        createMockItem({
          id: 1,
          name: 'Item with Photo',
          image_url: 'https://example.com/photo.jpg',
        }),
      ];

      render(
        <InventoryTable
          items={items}
          categories={['Electronics']}
          expandedCategory="Electronics"
          onExpandCategory={mockOnExpandCategory}
          onItemClick={mockOnItemClick}
        />
      );

      const thumbnail = screen.getByAltText('Item with Photo');
      fireEvent.click(thumbnail);

      // PhotoModal should be rendered with correct props
      expect(screen.getByTestId('photo-modal')).toBeInTheDocument();
      const photoHeaders = screen.getAllByText('Item with Photo');
      expect(photoHeaders.length).toBeGreaterThan(0);
    });

    it('should pass correct photo URL to PhotoModal', () => {
      const photoUrl = 'https://example.com/test-photo.jpg';
      const items = [
        createMockItem({
          id: 1,
          name: 'Test Item',
          image_url: photoUrl,
        }),
      ];

      render(
        <InventoryTable
          items={items}
          categories={['Electronics']}
          expandedCategory="Electronics"
          onExpandCategory={mockOnExpandCategory}
          onItemClick={mockOnItemClick}
        />
      );

      const thumbnail = screen.getByAltText('Test Item');
      fireEvent.click(thumbnail);

      // Find photo modal and verify URL
      const modal = screen.getByTestId('photo-modal');
      const photoImages = modal.querySelectorAll('img');
      expect(photoImages.length).toBeGreaterThan(0);
      expect(photoImages[0]).toHaveAttribute('src', photoUrl);
    });

    it('should close PhotoModal when close button clicked', () => {
      const items = [
        createMockItem({
          id: 1,
          image_url: 'https://example.com/photo.jpg',
        }),
      ];

      render(
        <InventoryTable
          items={items}
          categories={['Electronics']}
          expandedCategory="Electronics"
          onExpandCategory={mockOnExpandCategory}
          onItemClick={mockOnItemClick}
        />
      );

      const thumbnail = screen.getByAltText('Test Item');
      fireEvent.click(thumbnail);

      expect(screen.getByTestId('photo-modal')).toBeInTheDocument();

      const closeButton = screen.getByText('Close Photo');
      fireEvent.click(closeButton);

      expect(screen.queryByTestId('photo-modal')).not.toBeInTheDocument();
    });

    it('should not show PhotoModal if image_url is undefined', () => {
      const items = [createMockItem({ id: 1 })];

      render(
        <InventoryTable
          items={items}
          categories={['Electronics']}
          expandedCategory="Electronics"
          onExpandCategory={mockOnExpandCategory}
          onItemClick={mockOnItemClick}
        />
      );

      expect(screen.queryByTestId('photo-modal')).not.toBeInTheDocument();
    });
  });

  describe('Item Click Behavior', () => {
    it('should open ItemDetailModal when clicking item name/specs', () => {
      const items = [
        createMockItem({
          id: 1,
          name: 'Item Name',
          specs: 'Test specs',
          image_url: 'https://example.com/photo.jpg',
        }),
      ];

      render(
        <InventoryTable
          items={items}
          categories={['Electronics']}
          expandedCategory="Electronics"
          onExpandCategory={mockOnExpandCategory}
          onItemClick={mockOnItemClick}
        />
      );

      // Click on the item name (not the thumbnail)
      const itemName = screen.getByText('Item Name');
      fireEvent.click(itemName);

      expect(screen.getByTestId('item-detail-modal')).toBeInTheDocument();
    });

    it('should NOT trigger item detail when clicking thumbnail', () => {
      const items = [
        createMockItem({
          id: 1,
          image_url: 'https://example.com/photo.jpg',
        }),
      ];

      render(
        <InventoryTable
          items={items}
          categories={['Electronics']}
          expandedCategory="Electronics"
          onExpandCategory={mockOnExpandCategory}
          onItemClick={mockOnItemClick}
        />
      );

      const thumbnail = screen.getByAltText('Test Item');
      fireEvent.click(thumbnail);

      // Only PhotoModal should be shown, not ItemDetailModal
      expect(screen.queryByTestId('item-detail-modal')).not.toBeInTheDocument();
      expect(screen.getByTestId('photo-modal')).toBeInTheDocument();
    });

    it('should call onItemClick when item is selected', () => {
      const items = [
        createMockItem({
          id: 1,
          name: 'Test Item',
        }),
      ];

      render(
        <InventoryTable
          items={items}
          categories={['Electronics']}
          expandedCategory="Electronics"
          onExpandCategory={mockOnExpandCategory}
          onItemClick={mockOnItemClick}
        />
      );

      const itemName = screen.getByText('Test Item');
      fireEvent.click(itemName);

      expect(mockOnItemClick).toHaveBeenCalled();
    });
  });

  describe('Multiple Items', () => {
    it('should display multiple items with mixed photo states', () => {
      const items = [
        createMockItem({
          id: 1,
          name: 'Item A',
          image_url: 'https://example.com/photo-a.jpg',
        }),
        createMockItem({
          id: 2,
          name: 'Item B',
          image_url: undefined,
        }),
        createMockItem({
          id: 3,
          name: 'Item C',
          image_url: 'https://example.com/photo-c.jpg',
        }),
      ];

      render(
        <InventoryTable
          items={items}
          categories={['Electronics']}
          expandedCategory="Electronics"
          onExpandCategory={mockOnExpandCategory}
          onItemClick={mockOnItemClick}
        />
      );

      // Check Item A has photo
      expect(screen.getByAltText('Item A')).toBeInTheDocument();

      // Check Item B has no photo text
      const itemBText = screen.getAllByText('No photo');
      expect(itemBText.length).toBeGreaterThanOrEqual(1);

      // Check Item C has photo
      expect(screen.getByAltText('Item C')).toBeInTheDocument();
    });

    it('should open correct PhotoModal for each item', () => {
      const items = [
        createMockItem({
          id: 1,
          name: 'Item A',
          image_url: 'https://example.com/photo-a.jpg',
        }),
        createMockItem({
          id: 2,
          name: 'Item C',
          image_url: 'https://example.com/photo-c.jpg',
        }),
      ];

      render(
        <InventoryTable
          items={items}
          categories={['Electronics']}
          expandedCategory="Electronics"
          onExpandCategory={mockOnExpandCategory}
          onItemClick={mockOnItemClick}
        />
      );

      // Click Item A thumbnail
      const thumbnailA = screen.getByAltText('Item A');
      fireEvent.click(thumbnailA);

      let photoModal = screen.getByTestId('photo-modal');
      expect(photoModal).toHaveTextContent('Item A');

      // Close and open Item C
      let closeButton = screen.getByText('Close Photo');
      fireEvent.click(closeButton);

      const thumbnailC = screen.getByAltText('Item C');
      fireEvent.click(thumbnailC);

      photoModal = screen.getByTestId('photo-modal');
      expect(photoModal).toHaveTextContent('Item C');
    });
  });

  describe('Styling and Interaction States', () => {
    it('should apply hover styling to thumbnail', () => {
      const items = [
        createMockItem({
          id: 1,
          image_url: 'https://example.com/photo.jpg',
        }),
      ];

      render(
        <InventoryTable
          items={items}
          categories={['Electronics']}
          expandedCategory="Electronics"
          onExpandCategory={mockOnExpandCategory}
          onItemClick={mockOnItemClick}
        />
      );

      const thumbnail = screen.getByAltText('Test Item');
      expect(thumbnail.parentElement).toHaveClass(
        'hover:border-primary',
        'transition-colors'
      );
    });

    it('should apply active state to thumbnail', () => {
      const items = [
        createMockItem({
          id: 1,
          image_url: 'https://example.com/photo.jpg',
        }),
      ];

      render(
        <InventoryTable
          items={items}
          categories={['Electronics']}
          expandedCategory="Electronics"
          onExpandCategory={mockOnExpandCategory}
          onItemClick={mockOnItemClick}
        />
      );

      const thumbnail = screen.getByAltText('Test Item');
      expect(thumbnail.parentElement).toHaveClass('active:scale-95');
    });
  });
});