import { useContext, useEffect, useState } from 'react'
import PropTypes from 'prop-types'
import { Flex } from 'antd'
import { ElectronContext } from '../context/ElectronContext'

import CloseColored from '../../../../assets/trafficlights/closecolored.svg?react'
import CloseHoverColored from '../../../../assets/trafficlights/closehovercolored.svg?react'
import CloseDownColored from '../../../../assets/trafficlights/closedowncolored.svg?react'
import MinimizeColored from '../../../../assets/trafficlights/minimizecolored.svg?react'
import MinimizeHoverColored from '../../../../assets/trafficlights/minimizehovercolored.svg?react'
import MinimizeDownColored from '../../../../assets/trafficlights/minimizedowncolored.svg?react'
import FullscreenColored from '../../../../assets/trafficlights/fullscreencolored.svg?react'
import FullscreenHoverColored from '../../../../assets/trafficlights/fullscreenhovercolored.svg?react'
import FullscreenDownColored from '../../../../assets/trafficlights/fullscreendowncolored.svg?react'
import ExitFullscreenHoverColored from '../../../../assets/trafficlights/exitfullscreenhovercolored.svg?react'
import ExitFullscreenDownColored from '../../../../assets/trafficlights/exitfullscreendowncolored.svg?react'
import NoFocus from '../../../../assets/trafficlights/nofocus.svg?react'

const TRAFFIC_LIGHT_SIZE = 12

const TRAFFIC_LIGHT_BUTTON_STYLE = {
  width: TRAFFIC_LIGHT_SIZE,
  height: TRAFFIC_LIGHT_SIZE,
  padding: 0,
  border: 'none',
  background: 'transparent',
  cursor: 'default',
  lineHeight: 0,
  display: 'flex',
  alignItems: 'center',
  justifyContent: 'center'
}

const TRAFFIC_LIGHT_ICON_STYLE = {
  width: TRAFFIC_LIGHT_SIZE,
  height: TRAFFIC_LIGHT_SIZE,
  display: 'block'
}

function getTrafficLightIcon({ isEnabled, isFocused, isActive, isHovered, icons }) {
  if (!isEnabled || !isFocused) {
    return icons.noFocus
  }
  if (isActive) {
    return icons.down
  }
  if (isHovered) {
    return icons.hover
  }
  return icons.colored
}

const TrafficLightButton = ({
  action,
  icons,
  isGroupHovered,
  activeAction,
  isEnabled,
  isWindowFocused,
  onActive,
  onAction
}) => {
  const Icon = getTrafficLightIcon({
    isEnabled,
    isFocused: isWindowFocused,
    isActive: activeAction === action,
    isHovered: isGroupHovered,
    icons
  })

  const handleMouseDown = (event) => {
    if (!isEnabled) return

    event.preventDefault()
    event.stopPropagation()
    onActive(action)
    onAction(action)
  }

  return (
    <button
      type='button'
      aria-label={action}
      aria-disabled={!isEnabled}
      disabled={!isEnabled}
      className='electrobun-webkit-app-region-no-drag'
      style={TRAFFIC_LIGHT_BUTTON_STYLE}
      onMouseDown={handleMouseDown}
      onMouseUp={isEnabled ? () => onActive(null) : undefined}
    >
      <Icon style={TRAFFIC_LIGHT_ICON_STYLE} />
    </button>
  )
}

TrafficLightButton.propTypes = {
  action: PropTypes.string.isRequired,
  icons: PropTypes.shape({
    colored: PropTypes.elementType.isRequired,
    hover: PropTypes.elementType.isRequired,
    down: PropTypes.elementType.isRequired,
    noFocus: PropTypes.elementType.isRequired
  }).isRequired,
  isGroupHovered: PropTypes.bool.isRequired,
  activeAction: PropTypes.string,
  isEnabled: PropTypes.bool.isRequired,
  isWindowFocused: PropTypes.bool.isRequired,
  onActive: PropTypes.func.isRequired,
  onAction: PropTypes.func.isRequired
}

const MacOSTrafficLights = () => {
  const { handleWindowControl, isFullScreen } = useContext(ElectronContext)
  const [isGroupHovered, setIsGroupHovered] = useState(false)
  const [activeAction, setActiveAction] = useState(null)
  const [isWindowFocused, setIsWindowFocused] = useState(
    () => document.hasFocus?.() ?? true
  )

  useEffect(() => {
    const handleFocus = () => setIsWindowFocused(true)
    const handleBlur = () => setIsWindowFocused(false)

    window.addEventListener('focus', handleFocus)
    window.addEventListener('blur', handleBlur)

    return () => {
      window.removeEventListener('focus', handleFocus)
      window.removeEventListener('blur', handleBlur)
    }
  }, [])

  const fullscreenIcons = isFullScreen
    ? {
        colored: FullscreenColored,
        hover: ExitFullscreenHoverColored,
        down: ExitFullscreenDownColored,
        noFocus: NoFocus
      }
    : {
        colored: FullscreenColored,
        hover: FullscreenHoverColored,
        down: FullscreenDownColored,
        noFocus: NoFocus
      }

  const handleAction = (action) => {
    handleWindowControl(action)
  }

  return (
    <Flex
      className='electrobun-webkit-app-region-no-drag'
      style={{
        width: '56.6px',
        marginLeft: '12.5px',
        marginRight: '12.5px',
        position: 'relative',
        zIndex: 9999
      }}
      gap={8}
      onMouseEnter={() => setIsGroupHovered(true)}
      onMouseLeave={() => {
        setIsGroupHovered(false)
        setActiveAction(null)
      }}
    >
      <TrafficLightButton
        action='close'
        icons={{
          colored: CloseColored,
          hover: CloseHoverColored,
          down: CloseDownColored,
          noFocus: NoFocus
        }}
        isGroupHovered={isGroupHovered}
        activeAction={activeAction}
        isEnabled
        isWindowFocused={isWindowFocused}
        onActive={setActiveAction}
        onAction={handleAction}
      />
      <TrafficLightButton
        action='minimize'
        icons={{
          colored: MinimizeColored,
          hover: MinimizeHoverColored,
          down: MinimizeDownColored,
          noFocus: NoFocus
        }}
        isGroupHovered={isGroupHovered}
        activeAction={activeAction}
        isEnabled={!isFullScreen}
        isWindowFocused={isWindowFocused}
        onActive={setActiveAction}
        onAction={handleAction}
      />
      <TrafficLightButton
        action='fullscreen'
        icons={fullscreenIcons}
        isGroupHovered={isGroupHovered}
        activeAction={activeAction}
        isEnabled
        isWindowFocused={isWindowFocused}
        onActive={setActiveAction}
        onAction={handleAction}
      />
    </Flex>
  )
}

export default MacOSTrafficLights