import { render, screen, fireEvent } from '@testing-library/react'
import userEvent from '@testing-library/user-event'
import { describe, it, expect, vi, beforeEach } from 'vitest'
import { InlineEditCell } from './InlineEditCell'

// Wrap in a table/row to satisfy semantic HTML for TableCell
function Wrapper({ children }: { children: React.ReactNode }) {
  return (
    <table>
      <tbody>
        <tr>{children}</tr>
      </tbody>
    </table>
  )
}

describe('InlineEditCell', () => {
  const defaultProps = {
    value: 42.5,
    currency: 'EUR',
    onSave: vi.fn().mockResolvedValue(undefined),
  }

  beforeEach(() => {
    vi.clearAllMocks()
  })

  it('renders formatted currency value in display mode', () => {
    render(
      <Wrapper>
        <InlineEditCell {...defaultProps} />
      </Wrapper>
    )
    // Should show formatted value (42.5 in EUR → some formatted string containing 42)
    expect(screen.getByText(/42/)).toBeInTheDocument()
  })

  it('enters edit mode on click', async () => {
    const user = userEvent.setup()
    render(
      <Wrapper>
        <InlineEditCell {...defaultProps} />
      </Wrapper>
    )
    const span = screen.getByText(/42/)
    await user.click(span)
    // After click, an input should be visible
    expect(screen.getByRole('spinbutton')).toBeInTheDocument()
  })

  it('calls onSave with parsed number on blur', async () => {
    const user = userEvent.setup()
    const onSave = vi.fn().mockResolvedValue(undefined)
    render(
      <Wrapper>
        <InlineEditCell {...defaultProps} onSave={onSave} />
      </Wrapper>
    )
    const span = screen.getByText(/42/)
    await user.click(span)

    const input = screen.getByRole('spinbutton')
    await user.clear(input)
    await user.type(input, '100')
    fireEvent.blur(input)

    expect(onSave).toHaveBeenCalledWith(100)
  })

  it('does not call onSave when value unchanged', async () => {
    const user = userEvent.setup()
    const onSave = vi.fn().mockResolvedValue(undefined)
    render(
      <Wrapper>
        <InlineEditCell {...defaultProps} onSave={onSave} />
      </Wrapper>
    )
    const span = screen.getByText(/42/)
    await user.click(span)

    // Don't change the value, just blur
    const input = screen.getByRole('spinbutton')
    fireEvent.blur(input)

    expect(onSave).not.toHaveBeenCalled()
  })

  it('calls onSave on Enter key', async () => {
    const user = userEvent.setup()
    const onSave = vi.fn().mockResolvedValue(undefined)
    render(
      <Wrapper>
        <InlineEditCell {...defaultProps} onSave={onSave} />
      </Wrapper>
    )
    const span = screen.getByText(/42/)
    await user.click(span)

    const input = screen.getByRole('spinbutton')
    await user.clear(input)
    await user.type(input, '99')
    await user.keyboard('{Enter}')

    expect(onSave).toHaveBeenCalledWith(99)
  })

  // New tests for pencil icon and callbacks
  it('renders a pencil icon in display mode', () => {
    render(
      <Wrapper>
        <InlineEditCell {...defaultProps} />
      </Wrapper>
    )
    // Pencil icon from lucide-react renders as an SVG — query by its test-id or aria role
    // The Pencil icon should be present in the DOM (opacity-0, shown on hover via CSS)
    const pencilIcon = document.querySelector('svg[data-testid="pencil-icon"]') ||
      document.querySelector('.lucide-pencil')
    expect(pencilIcon).not.toBeNull()
  })

  it('calls onSaveSuccess callback after successful save', async () => {
    const user = userEvent.setup()
    const onSave = vi.fn().mockResolvedValue(undefined)
    const onSaveSuccess = vi.fn()
    render(
      <Wrapper>
        <InlineEditCell {...defaultProps} onSave={onSave} onSaveSuccess={onSaveSuccess} />
      </Wrapper>
    )
    const span = screen.getByText(/42/)
    await user.click(span)

    const input = screen.getByRole('spinbutton')
    await user.clear(input)
    await user.type(input, '100')
    fireEvent.blur(input)

    // Wait for async operations
    await vi.waitFor(() => {
      expect(onSaveSuccess).toHaveBeenCalledTimes(1)
    })
  })

  it('calls onSaveError and reverts value when onSave rejects', async () => {
    const user = userEvent.setup()
    const onSave = vi.fn().mockRejectedValue(new Error('Save failed'))
    const onSaveError = vi.fn()
    render(
      <Wrapper>
        <InlineEditCell {...defaultProps} value={42.5} onSave={onSave} onSaveError={onSaveError} />
      </Wrapper>
    )
    const span = screen.getByText(/42/)
    await user.click(span)

    const input = screen.getByRole('spinbutton')
    await user.clear(input)
    await user.type(input, '999')
    fireEvent.blur(input)

    // Wait for async operations
    await vi.waitFor(() => {
      expect(onSaveError).toHaveBeenCalledTimes(1)
    })

    // Value should revert back to original — display mode shows original value
    await vi.waitFor(() => {
      expect(screen.getByText(/42/)).toBeInTheDocument()
    })
  })

  it('does not call onSaveSuccess when value is unchanged', async () => {
    const user = userEvent.setup()
    const onSave = vi.fn().mockResolvedValue(undefined)
    const onSaveSuccess = vi.fn()
    render(
      <Wrapper>
        <InlineEditCell {...defaultProps} onSave={onSave} onSaveSuccess={onSaveSuccess} />
      </Wrapper>
    )
    const span = screen.getByText(/42/)
    await user.click(span)

    // Don't change the value, just blur
    const input = screen.getByRole('spinbutton')
    fireEvent.blur(input)

    expect(onSave).not.toHaveBeenCalled()
    expect(onSaveSuccess).not.toHaveBeenCalled()
  })
})