import { Dimensions, Platform, StatusBar } from 'react-native'

export function getInitSafeAreaInsets (): Record<string, number> {
  const safeInsets = {
    top: getStatusBarHeight(true),
    bottom: getBottomSpace(),
    right: 0,
    left: 0
  }
  return safeInsets
}

function getStatusBarHeight (safe) {
  return Platform.select({
    ios: ifIphoneX(safe ? 44 : 30, 20),
    android: StatusBar.currentHeight,
    default: 0
  })
}

function getBottomSpace () {
  return isIphoneX() ? 34 : 0
}

function isIphoneX () {
  const dimen = Dimensions.get('window')
  return (
    Platform.OS === 'ios' &&
    !Platform.isPad &&
    !Platform.isTV &&
    ((dimen.height === 780 || dimen.width === 780) ||
      (dimen.height === 812 || dimen.width === 812) ||
      (dimen.height === 844 || dimen.width === 844) ||
      (dimen.height === 896 || dimen.width === 896) ||
      (dimen.height === 926 || dimen.width === 926))
  )
}

function ifIphoneX (iphoneXStyle, regularStyle) {
  if (isIphoneX()) {
    return iphoneXStyle
  }
  return regularStyle
}