import { EventConsumer, EventMapBase } from '@react-navigation/core'
import { ReactElement, useCallback, useEffect, useMemo, useState } from 'react'
import { LayoutChangeEvent, Platform } from 'react-native'
import Animated, {
  Easing,
  SharedValue,
  useAnimatedStyle,
  useSharedValue,
  withDelay,
  withRepeat,
  withSequence,
  withSpring,
  withTiming,
} from 'react-native-reanimated'
import { Circle, Defs, Svg } from 'react-native-svg'
import { Flex, FlexProps, Image, isWeb, useIsDarkMode } from 'ui/src'
import { Jiggly } from 'ui/src/animations'
import { ONBOARDING_LANDING_DARK, ONBOARDING_LANDING_LIGHT, UNISWAP_LOGO } from 'ui/src/assets'
import { AnimatedFlex } from 'ui/src/components/layout/AnimatedFlex'
import { useDeviceDimensions } from 'ui/src/hooks/useDeviceDimensions'
import { imageSizes } from 'ui/src/theme'
import { isAndroid } from 'utilities/src/platform'
import { ONE_SECOND_MS } from 'utilities/src/time/time'
import { useTimeout } from 'utilities/src/time/timing'
import {
  BuyElement,
  FroggyElement,
  HeartElement,
  OpenseaElement,
  PolygonElement,
  ReceiveUSDCElement,
  SendElement,
  SwapElement,
  UniconElement,
} from 'wallet/src/components/landing/elements'
import { InnerCircleGradient, OuterCircleGradient } from 'wallet/src/components/landing/landingBackgroundGradients'
import { Language } from 'wallet/src/features/language/constants'
import { useCurrentLanguage } from 'wallet/src/features/language/hooks'

const DEFAULT_INNER_CIRCLE_SIZE = 120
const DEFAULT_OUTER_CIRCLE_SIZE = 215

const ROTATION_DURATION = 150000
const ACCELERATION_DURATION = ROTATION_DURATION / 50

const LOGO_SIZE_WEB = 80
const LOGO_SCALE_DELAY = 0.5 * ONE_SECOND_MS
const LOGO_SCALE_DURATION = 0.7 * ONE_SECOND_MS
const ANIMATED_ELEMENTS_DELAY = LOGO_SCALE_DELAY + LOGO_SCALE_DURATION - 750
const INNER_CIRCLE_SHOW_DELAY = 0.3 * ONE_SECOND_MS
const OUTER_CIRCLE_SHOW_DELAY = 0.5 * ONE_SECOND_MS

export const LANDING_ANIMATION_DURATION = ANIMATED_ELEMENTS_DELAY

const OnboardingAnimation = ({
  elementsStyle,
  innerCircleSize,
  outerCircleSize,
}: {
  elementsStyle: FlexProps['style']
  innerCircleSize: number
  outerCircleSize: number
}): JSX.Element => {
  const [boxWidth, setBoxWidth] = useState<number>(0)
  const [showAnimatedElements, setShowAnimatedElements] = useState(false)

  const onLayout = useCallback((event: LayoutChangeEvent) => {
    setBoxWidth(event.nativeEvent.layout.width)
  }, [])

  const uniswapLogoScale = useSharedValue(1.5)
  const animatedStyle = useAnimatedStyle(() => ({ transform: [{ scale: uniswapLogoScale.value }] }), [uniswapLogoScale])

  useEffect(() => {
    uniswapLogoScale.value = withDelay(
      LOGO_SCALE_DELAY,
      withTiming(1, {
        duration: LOGO_SCALE_DURATION,
        easing: Easing.elastic(1.1),
      }),
    )
  }, [uniswapLogoScale])

  useTimeout(() => {
    setShowAnimatedElements(true)
  }, ANIMATED_ELEMENTS_DELAY)

  return (
    <Flex grow justifyContent="center" style={{ transform: isWeb ? 'scale(0.9)' : undefined }} onLayout={onLayout}>
      {showAnimatedElements ? (
        <Flex style={elementsStyle}>
          <AnimatedElements innerCircleSize={innerCircleSize} outerCircleSize={outerCircleSize} width={boxWidth} />
        </Flex>
      ) : null}
      <AnimatedFlex alignSelf="center" position="absolute" style={animatedStyle}>
        <Jiggly duration={75} offset={5}>
          <Image
            height={isWeb ? LOGO_SIZE_WEB : imageSizes.image100}
            resizeMode="contain"
            source={UNISWAP_LOGO}
            width={isWeb ? LOGO_SIZE_WEB : imageSizes.image100}
          />
        </Jiggly>
      </AnimatedFlex>
    </Flex>
  )
}

const INITIAL_ANIMATION_LENGTH = 0.1

const AnimatedElements = ({
  width,
  innerCircleSize,
  outerCircleSize,
}: {
  width: number
  innerCircleSize: number
  outerCircleSize: number
}): JSX.Element | null => {
  const isDarkMode = useIsDarkMode()

  const animatedElementsInner = useMemo(() => {
    const innerProps = { radius: innerCircleSize, speed: -1, isInner: true }

    return [
      {
        element: <SendElement />,
        coordinates: { deg: 3.2, ...innerProps },
      },
      {
        element: <HeartElement />,
        coordinates: { deg: 2.0, ...innerProps },
      },
      {
        element: <OpenseaElement />,
        coordinates: { deg: 0.3, ...innerProps },
      },
      {
        element: <BuyElement />,
        coordinates: { deg: 5.5, ...innerProps },
      },
    ]
  }, [innerCircleSize])

  const animatedElementsOuter = useMemo(() => {
    const outerProps = { radius: outerCircleSize, speed: 1 }
    return [
      {
        element: <SwapElement />,
        coordinates: { radius: outerCircleSize + 40, deg: 1, speed: 1, flatteningY: 0.85 },
      },
      { element: <PolygonElement />, coordinates: { deg: 2.2, ...outerProps } },
      { element: <UniconElement />, coordinates: { deg: 3.8, ...outerProps } },
      { element: <FroggyElement />, coordinates: { deg: 4.8, ...outerProps } },
      {
        element: <ReceiveUSDCElement />,
        coordinates: { deg: 5.7, ...outerProps },
      },
    ]
  }, [outerCircleSize])

  const rotation = useSharedValue(0)
  const innerAnimation = useSharedValue(0)
  const outerAnimation = useSharedValue(0)

  useEffect(() => {
    rotation.value = withDelay(
      1800,
      withSequence(
        withTiming(INITIAL_ANIMATION_LENGTH, {
          duration: ACCELERATION_DURATION,
          easing: Easing.in(Easing.ease),
        }),
        withRepeat(
          withTiming(2 * Math.PI + INITIAL_ANIMATION_LENGTH, {
            duration: ROTATION_DURATION,
            easing: Easing.linear,
          }),
          -1,
        ),
      ),
    )
    innerAnimation.value = withDelay(INNER_CIRCLE_SHOW_DELAY, withSpring(0.8))
    outerAnimation.value = withDelay(OUTER_CIRCLE_SHOW_DELAY, withSpring(0.8))
  }, [innerAnimation, outerAnimation, rotation])

  const innerCircleStyle = useAnimatedStyle(() => {
    return {
      opacity: innerAnimation.value,
    }
  }, [innerAnimation])

  const outerCircleStyle = useAnimatedStyle(() => {
    return {
      opacity: outerAnimation.value,
    }
  }, [outerAnimation])

  return (
    <Flex centered grow>
      <Animated.View key="Circle1" style={[{ position: 'absolute' }, innerCircleStyle]}>
        <Svg height={width * 2} width={width}>
          <Defs>
            <InnerCircleGradient id="gradInner" />
          </Defs>
          <Circle
            cx={width / 2}
            cy={width}
            fill="none"
            r={innerCircleSize}
            stroke="url(#gradInner)"
            strokeOpacity={isDarkMode ? '0.2' : '0.6'}
            strokeWidth="1"
          />
        </Svg>
      </Animated.View>
      <Animated.View style={[{ position: 'absolute' }, outerCircleStyle]}>
        <Svg height={width * 2} width={width}>
          <Defs>
            <OuterCircleGradient id="gradOuter" />
          </Defs>
          <Circle
            cx={width / 2}
            cy={width}
            fill="none"
            r={outerCircleSize}
            stroke="url(#gradOuter)"
            strokeOpacity={isDarkMode ? '0.2' : '1'}
            strokeWidth="1"
          />
        </Svg>
      </Animated.View>
      {animatedElementsInner.map(({ element, coordinates }, index) => (
        <RotateElement
          key={`${index}_ICON_INNER`}
          coordinates={coordinates}
          element={element}
          innerAnimation={innerAnimation}
          outerAnimation={outerAnimation}
          rotation={rotation}
        />
      ))}
      {animatedElementsOuter.map(({ element, coordinates }, index) => (
        <RotateElement
          key={`${index}_ICON_OUTER`}
          coordinates={coordinates}
          element={element}
          innerAnimation={innerAnimation}
          outerAnimation={outerAnimation}
          rotation={rotation}
        />
      ))}
    </Flex>
  )
}

const RotateElement = ({
  element,
  coordinates,
  innerAnimation,
  outerAnimation,
  rotation,
}: {
  element: ReactElement
  coordinates: {
    radius: number
    deg: number
    speed: number
    flatteningY?: number
    isInner?: boolean
  }
  innerAnimation: SharedValue<number>
  outerAnimation: SharedValue<number>
  rotation: SharedValue<number>
}): ReactElement => {
  const animatedStyle = useAnimatedStyle(() => {
    return {
      justifyContent: 'center',
      position: 'absolute',
      opacity: coordinates.isInner ? innerAnimation.value : outerAnimation.value,
      transform: [
        {
          scale: 0.9 + (coordinates.isInner ? innerAnimation.value : outerAnimation.value) * 0.1,
        },
        {
          translateX: Math.cos((rotation.value + coordinates.deg) * coordinates.speed) * coordinates.radius,
        },
        {
          translateY:
            Math.sin((rotation.value + coordinates.deg) * coordinates.speed) *
            coordinates.radius *
            (coordinates.flatteningY || 1),
        },
      ],
    }
  }, [coordinates, innerAnimation, outerAnimation, rotation])

  return (
    <Animated.View style={animatedStyle}>
      <Jiggly>{element}</Jiggly>
    </Animated.View>
  )
}

export const LandingBackground = ({
  navigationEventConsumer,
  elementsStyle,
  innerCircleSize = DEFAULT_INNER_CIRCLE_SIZE,
  outerCircleSize = DEFAULT_OUTER_CIRCLE_SIZE,
}: {
  navigationEventConsumer?: EventConsumer<EventMapBase>
  elementsStyle?: FlexProps['style']
  innerCircleSize?: number
  outerCircleSize?: number
}): JSX.Element | null => {
  const [blurred, setBlurred] = useState(false)
  const [hideAnimation, setHideAnimation] = useState(false)
  const language = useCurrentLanguage()

  useEffect(() => {
    return navigationEventConsumer?.addListener('blur', () => {
      // set this flag on blur (when navigating to another screen)
      setBlurred(true)
    })
  }, [navigationEventConsumer])

  useEffect(() => {
    return navigationEventConsumer?.addListener('focus', () => {
      // reset animation when focusing on this screen again
      setBlurred(false)
      setHideAnimation(false)
    })
  }, [navigationEventConsumer])

  // callback to turn off the animation (so that we can turn it back
  // on on focus)
  const turnAnimationOff = useCallback(() => {
    if (blurred) {
      setHideAnimation(true)
    }
  }, [blurred])

  // but make sure it's delayed a tiny bit, otherwise blur triggers
  // immediately, so the animation would disappear before the screen
  // transition animation happens
  useTimeout(turnAnimationOff, 500)

  if (hideAnimation) {
    // resets the animation to restart when the screen is mounted again (eg. going back)
    return null
  }

  // TODO: In Gradle there is a  minSdkVersion = 28 requirement, but in the conditional statement below the comment we check if SDK is smaller than 30, we can remove it after we bump the minimal SDK version to at least 30
  // Android 9 and 10 have issues with Rive, so we fallback on image
  if (
    // Android Platform.Version is always a number
    (isAndroid && typeof Platform.Version === 'number' && Platform.Version < 30) ||
    language !== Language.English
  ) {
    return <OnboardingStaticImage />
  }

  return (
    <OnboardingAnimation
      elementsStyle={elementsStyle}
      innerCircleSize={innerCircleSize}
      outerCircleSize={outerCircleSize}
    />
  )
}

const OnboardingStaticImage = (): JSX.Element => {
  const isDarkMode = useIsDarkMode()
  const { fullHeight, fullWidth } = useDeviceDimensions()
  return (
    <Image
      source={isDarkMode ? Platform.select(ONBOARDING_LANDING_DARK) : Platform.select(ONBOARDING_LANDING_LIGHT)}
      style={{ height: fullHeight, width: fullWidth }}
    />
  )
}
