import { describe, it, expect, beforeEach, afterEach } from 'vitest'
import { render, screen } from '@testing-library/react'
import { BrowserPanel } from '../components/BrowserPanel'

describe('BrowserPanel', () => {
  const originalLocation = window.location

  beforeEach(() => {
    // Reset location before each test
    Object.defineProperty(window, 'location', {
      configurable: true,
      writable: true,
      value: { hostname: 'localhost' },
    })
  })

  afterEach(() => {
    Object.defineProperty(window, 'location', {
      configurable: true,
      writable: true,
      value: originalLocation,
    })
  })

  describe('placeholder (no sessionId)', () => {
    it('renders placeholder text when sessionId is null', () => {
      render(<BrowserPanel sessionId={null} />)
      expect(screen.getByText('Select a session to view the browser')).toBeTruthy()
    })

    it('does not render an iframe when sessionId is null', () => {
      const { container } = render(<BrowserPanel sessionId={null} />)
      expect(container.querySelector('iframe')).toBeNull()
    })

    it('placeholder div has padding 2rem', () => {
      const { container } = render(<BrowserPanel sessionId={null} />)
      const div = container.firstElementChild as HTMLElement
      expect(div.style.padding).toBe('2rem')
    })

    it('placeholder div text has color #6a6a8a', () => {
      const { container } = render(<BrowserPanel sessionId={null} />)
      const div = container.firstElementChild as HTMLElement
      // jsdom normalizes hex colors to rgb() — #6a6a8a = rgb(106, 106, 138)
      expect(div.style.color).toBe('rgb(106, 106, 138)')
    })

    it('placeholder div text is centered', () => {
      const { container } = render(<BrowserPanel sessionId={null} />)
      const div = container.firstElementChild as HTMLElement
      expect(div.style.textAlign).toBe('center')
    })
  })

  describe('iframe (with sessionId)', () => {
    it('renders an iframe when sessionId is provided', () => {
      const { container } = render(<BrowserPanel sessionId="session-abc" />)
      expect(container.querySelector('iframe')).toBeTruthy()
    })

    it('does not render placeholder text when sessionId is provided', () => {
      render(<BrowserPanel sessionId="session-abc" />)
      expect(screen.queryByText('Select a session to view the browser')).toBeNull()
    })

    it('iframe has title "Browser - noVNC"', () => {
      const { container } = render(<BrowserPanel sessionId="session-abc" />)
      const iframe = container.querySelector('iframe') as HTMLIFrameElement
      expect(iframe.title).toBe('Browser - noVNC')
    })

    it('iframe has width 100%', () => {
      const { container } = render(<BrowserPanel sessionId="session-abc" />)
      const iframe = container.querySelector('iframe') as HTMLIFrameElement
      expect(iframe.style.width).toBe('100%')
    })

    it('iframe has height 100%', () => {
      const { container } = render(<BrowserPanel sessionId="session-abc" />)
      const iframe = container.querySelector('iframe') as HTMLIFrameElement
      expect(iframe.style.height).toBe('100%')
    })

    it('iframe has no border', () => {
      const { container } = render(<BrowserPanel sessionId="session-abc" />)
      const iframe = container.querySelector('iframe') as HTMLIFrameElement
      // jsdom expands border shorthand — check borderStyle which carries the 'none' value
      expect(iframe.style.borderStyle).toBe('none')
    })

    it('iframe has dark background color #0a0a1a', () => {
      const { container } = render(<BrowserPanel sessionId="session-abc" />)
      const iframe = container.querySelector('iframe') as HTMLIFrameElement
      // jsdom normalizes hex colors to rgb() — #0a0a1a = rgb(10, 10, 26)
      expect(iframe.style.background).toBe('rgb(10, 10, 26)')
    })

    it('iframe has clipboard allow attribute', () => {
      const { container } = render(<BrowserPanel sessionId="session-abc" />)
      const iframe = container.querySelector('iframe') as HTMLIFrameElement
      expect(iframe.getAttribute('allow')).toBe('clipboard-read; clipboard-write')
    })
  })

  describe('getVncUrl() — URL detection', () => {
    it('returns cloudflared HTTPS URL when hostname is research.ampbox.io', () => {
      Object.defineProperty(window, 'location', {
        configurable: true,
        writable: true,
        value: { hostname: 'research.ampbox.io' },
      })
      const { container } = render(<BrowserPanel sessionId="session-1" />)
      const iframe = container.querySelector('iframe') as HTMLIFrameElement
      expect(iframe.src).toBe(
        'https://vnc.ampbox.io/vnc.html?autoconnect=true&resize=remote&quality=6&compression=2'
      )
    })

    it('returns localhost http URL with port 6080 when hostname is localhost', () => {
      Object.defineProperty(window, 'location', {
        configurable: true,
        writable: true,
        value: { hostname: 'localhost' },
      })
      const { container } = render(<BrowserPanel sessionId="session-1" />)
      const iframe = container.querySelector('iframe') as HTMLIFrameElement
      expect(iframe.src).toBe(
        'http://localhost:6080/vnc.html?autoconnect=true&resize=remote&quality=6&compression=2'
      )
    })

    it('returns http URL with other hostname when not research.ampbox.io', () => {
      Object.defineProperty(window, 'location', {
        configurable: true,
        writable: true,
        value: { hostname: '192.168.1.100' },
      })
      const { container } = render(<BrowserPanel sessionId="session-1" />)
      const iframe = container.querySelector('iframe') as HTMLIFrameElement
      expect(iframe.src).toBe(
        'http://192.168.1.100:6080/vnc.html?autoconnect=true&resize=remote&quality=6&compression=2'
      )
    })

    it('URL includes autoconnect=true query param', () => {
      const { container } = render(<BrowserPanel sessionId="session-1" />)
      const iframe = container.querySelector('iframe') as HTMLIFrameElement
      expect(iframe.src).toContain('autoconnect=true')
    })

    it('URL includes resize=remote query param', () => {
      const { container } = render(<BrowserPanel sessionId="session-1" />)
      const iframe = container.querySelector('iframe') as HTMLIFrameElement
      expect(iframe.src).toContain('resize=remote')
    })

    it('URL includes quality=6 query param', () => {
      const { container } = render(<BrowserPanel sessionId="session-1" />)
      const iframe = container.querySelector('iframe') as HTMLIFrameElement
      expect(iframe.src).toContain('quality=6')
    })

    it('URL includes compression=2 query param', () => {
      const { container } = render(<BrowserPanel sessionId="session-1" />)
      const iframe = container.querySelector('iframe') as HTMLIFrameElement
      expect(iframe.src).toContain('compression=2')
    })
  })
})