import { createTestingPinia } from '@pinia/testing'
import { mount } from '@vue/test-utils'
import { describe, expect, it, vi } from 'vitest'
import { nextTick } from 'vue'
import { createI18n } from 'vue-i18n'

import { downloadFile } from '@/base/common/downloadUtil'
import ImagePreview from '@/renderer/extensions/vueNodes/components/ImagePreview.vue'

// Mock downloadFile to avoid DOM errors
vi.mock('@/base/common/downloadUtil', () => ({
  downloadFile: vi.fn()
}))

const i18n = createI18n({
  legacy: false,
  locale: 'en',
  messages: {
    en: {
      g: {
        editOrMaskImage: 'Edit or mask image',
        downloadImage: 'Download image',
        removeImage: 'Remove image',
        viewImageOfTotal: 'View image {index} of {total}',
        imagePreview:
          'Image preview - Use arrow keys to navigate between images',
        errorLoadingImage: 'Error loading image',
        failedToDownloadImage: 'Failed to download image',
        calculatingDimensions: 'Calculating dimensions',
        imageFailedToLoad: 'Image failed to load',
        loading: 'Loading'
      }
    }
  }
})

describe('ImagePreview', () => {
  const defaultProps = {
    imageUrls: [
      '/api/view?filename=test1.png&type=output',
      '/api/view?filename=test2.png&type=output'
    ]
  }

  const mountImagePreview = (props = {}) => {
    return mount(ImagePreview, {
      props: { ...defaultProps, ...props },
      global: {
        plugins: [
          createTestingPinia({
            createSpy: vi.fn
          }),
          i18n
        ],
        stubs: {
          'i-lucide:venetian-mask': true,
          'i-lucide:download': true,
          'i-lucide:x': true,
          'i-lucide:image-off': true,
          Skeleton: true
        }
      }
    })
  }

  it('renders image preview when imageUrls provided', () => {
    const wrapper = mountImagePreview()

    expect(wrapper.find('.image-preview').exists()).toBe(true)
    expect(wrapper.find('img').exists()).toBe(true)
    expect(wrapper.find('img').attributes('src')).toBe(
      defaultProps.imageUrls[0]
    )
  })

  it('does not render when no imageUrls provided', () => {
    const wrapper = mountImagePreview({ imageUrls: [] })

    expect(wrapper.find('.image-preview').exists()).toBe(false)
  })

  it('displays calculating dimensions text initially', () => {
    const wrapper = mountImagePreview()

    expect(wrapper.text()).toContain('Calculating dimensions')
  })

  it('shows navigation dots for multiple images', () => {
    const wrapper = mountImagePreview()

    const navigationDots = wrapper.findAll('.w-2.h-2.rounded-full')
    expect(navigationDots).toHaveLength(2)
  })

  it('does not show navigation dots for single image', () => {
    const wrapper = mountImagePreview({
      imageUrls: [defaultProps.imageUrls[0]]
    })

    const navigationDots = wrapper.findAll('.w-2.h-2.rounded-full')
    expect(navigationDots).toHaveLength(0)
  })

  it('shows action buttons on hover', async () => {
    const wrapper = mountImagePreview()

    // Initially buttons should not be visible
    expect(wrapper.find('.actions').exists()).toBe(false)

    // Trigger hover
    await wrapper.trigger('mouseenter')
    await nextTick()

    // Action buttons should now be visible
    expect(wrapper.find('.actions').exists()).toBe(true)
    expect(wrapper.findAll('.action-btn')).toHaveLength(2) // download, remove (no mask for multiple images)
  })

  it('hides action buttons when not hovering', async () => {
    const wrapper = mountImagePreview()

    // Trigger hover
    await wrapper.trigger('mouseenter')
    await nextTick()
    expect(wrapper.find('.actions').exists()).toBe(true)

    // Trigger mouse leave
    await wrapper.trigger('mouseleave')
    await nextTick()
    expect(wrapper.find('.actions').exists()).toBe(false)
  })

  it('shows mask/edit button only for single images', async () => {
    // Multiple images - should not show mask button
    const multipleImagesWrapper = mountImagePreview()
    await multipleImagesWrapper.trigger('mouseenter')
    await nextTick()

    const maskButtonMultiple = multipleImagesWrapper.find(
      '[aria-label="Edit or mask image"]'
    )
    expect(maskButtonMultiple.exists()).toBe(false)

    // Single image - should show mask button
    const singleImageWrapper = mountImagePreview({
      imageUrls: [defaultProps.imageUrls[0]]
    })
    await singleImageWrapper.trigger('mouseenter')
    await nextTick()

    const maskButtonSingle = singleImageWrapper.find(
      '[aria-label="Edit or mask image"]'
    )
    expect(maskButtonSingle.exists()).toBe(true)
  })

  it('handles action button clicks', async () => {
    const wrapper = mountImagePreview({
      imageUrls: [defaultProps.imageUrls[0]]
    })

    await wrapper.trigger('mouseenter')
    await nextTick()

    // Test Edit/Mask button - just verify it can be clicked without errors
    const editButton = wrapper.find('[aria-label="Edit or mask image"]')
    expect(editButton.exists()).toBe(true)
    await editButton.trigger('click')

    // Test Remove button - just verify it can be clicked without errors
    const removeButton = wrapper.find('[aria-label="Remove image"]')
    expect(removeButton.exists()).toBe(true)
    await removeButton.trigger('click')
  })

  it('handles download button click', async () => {
    const wrapper = mountImagePreview({
      imageUrls: [defaultProps.imageUrls[0]]
    })

    await wrapper.trigger('mouseenter')
    await nextTick()

    // Test Download button
    const downloadButton = wrapper.find('[aria-label="Download image"]')
    expect(downloadButton.exists()).toBe(true)
    await downloadButton.trigger('click')

    // Verify the mocked downloadFile was called
    expect(downloadFile).toHaveBeenCalledWith(defaultProps.imageUrls[0])
  })

  it('switches images when navigation dots are clicked', async () => {
    const wrapper = mountImagePreview()

    // Initially shows first image
    expect(wrapper.find('img').attributes('src')).toBe(
      defaultProps.imageUrls[0]
    )

    // Click second navigation dot
    const navigationDots = wrapper.findAll('.w-2.h-2.rounded-full')
    await navigationDots[1].trigger('click')
    await nextTick()

    // After clicking, component shows loading state (Skeleton), not img
    expect(wrapper.find('skeleton-stub').exists()).toBe(true)
    expect(wrapper.find('img').exists()).toBe(false)

    // Simulate image load event to clear loading state
    const component = wrapper.vm as any
    component.isLoading = false
    await nextTick()

    // Now should show second image
    const imgElement = wrapper.find('img')
    expect(imgElement.exists()).toBe(true)
    expect(imgElement.attributes('src')).toBe(defaultProps.imageUrls[1])
  })

  it('applies correct classes to navigation dots based on current image', async () => {
    const wrapper = mountImagePreview()

    const navigationDots = wrapper.findAll('.w-2.h-2.rounded-full')

    // First dot should be active (has bg-white class)
    expect(navigationDots[0].classes()).toContain('bg-white')
    expect(navigationDots[1].classes()).toContain('bg-white/50')

    // Switch to second image
    await navigationDots[1].trigger('click')
    await nextTick()

    // Second dot should now be active
    expect(navigationDots[0].classes()).toContain('bg-white/50')
    expect(navigationDots[1].classes()).toContain('bg-white')
  })

  it('loads image without errors', async () => {
    const wrapper = mountImagePreview()

    const img = wrapper.find('img')
    expect(img.exists()).toBe(true)

    // Just verify the image element is properly set up
    expect(img.attributes('src')).toBe(defaultProps.imageUrls[0])
  })

  it('has proper accessibility attributes', () => {
    const wrapper = mountImagePreview()

    const img = wrapper.find('img')
    expect(img.attributes('alt')).toBe('Node output 1')
  })

  it('updates alt text when switching images', async () => {
    const wrapper = mountImagePreview()

    // Initially first image
    expect(wrapper.find('img').attributes('alt')).toBe('Node output 1')

    // Switch to second image
    const navigationDots = wrapper.findAll('.w-2.h-2.rounded-full')
    await navigationDots[1].trigger('click')
    await nextTick()

    // Simulate image load event to clear loading state
    const component = wrapper.vm as any
    component.isLoading = false
    await nextTick()

    // Alt text should update
    const imgElement = wrapper.find('img')
    expect(imgElement.exists()).toBe(true)
    expect(imgElement.attributes('alt')).toBe('Node output 2')
  })
})