import Icon from '@components/Icon'
import { StyleConstants } from '@utils/styles/constants'
import layoutAnimation from '@utils/styles/layoutAnimation'
import { useTheme } from '@utils/styles/ThemeManager'
import React, { useEffect, useMemo, useRef, useState } from 'react'
import {
  AccessibilityProps,
  Pressable,
  StyleProp,
  StyleSheet,
  Text,
  View,
  ViewStyle
} from 'react-native'
import { Flow } from 'react-native-animated-spinkit'

export interface Props {
  accessibilityLabel?: AccessibilityProps['accessibilityLabel']
  accessibilityHint?: AccessibilityProps['accessibilityHint']

  style?: StyleProp<ViewStyle>

  type: 'icon' | 'text'
  content: string

  selected?: boolean
  loading?: boolean
  destructive?: boolean
  disabled?: boolean

  strokeWidth?: number
  size?: 'S' | 'M' | 'L'
  spacing?: 'XS' | 'S' | 'M' | 'L'
  round?: boolean
  overlay?: boolean

  onPress: () => void
}

const Button: React.FC<Props> = ({
  accessibilityLabel,
  accessibilityHint,
  style: customStyle,
  type,
  content,
  selected,
  loading = false,
  destructive = false,
  disabled = false,
  strokeWidth,
  size = 'M',
  spacing = 'S',
  round = false,
  overlay = false,
  onPress
}) => {
  const { mode, theme } = useTheme()

  const mounted = useRef(false)
  useEffect(() => {
    if (mounted.current) {
      layoutAnimation()
    } else {
      mounted.current = true
    }
  }, [content, loading, disabled])

  const loadingSpinkit = useMemo(
    () => (
      <View style={{ position: 'absolute' }}>
        <Flow size={StyleConstants.Font.Size[size]} color={theme.secondary} />
      </View>
    ),
    [mode]
  )

  const mainColor = useMemo(() => {
    if (selected) {
      return theme.blue
    } else if (overlay) {
      return theme.primaryOverlay
    } else if (disabled || loading) {
      return theme.disabled
    } else {
      if (destructive) {
        return theme.red
      } else {
        return theme.primaryDefault
      }
    }
  }, [mode, disabled, loading, selected])

  const colorBackground = useMemo(() => {
    if (overlay) {
      return theme.backgroundOverlayInvert
    } else {
      return theme.backgroundDefault
    }
  }, [mode])

  const children = useMemo(() => {
    switch (type) {
      case 'icon':
        return (
          <>
            <Icon
              name={content}
              color={mainColor}
              strokeWidth={strokeWidth}
              style={{ opacity: loading ? 0 : 1 }}
              size={StyleConstants.Font.Size[size] * (size === 'L' ? 1.25 : 1)}
            />
            {loading ? loadingSpinkit : null}
          </>
        )
      case 'text':
        return (
          <>
            <Text
              style={{
                color: mainColor,
                fontSize:
                  StyleConstants.Font.Size[size] * (size === 'L' ? 1.25 : 1),
                opacity: loading ? 0 : 1
              }}
              children={content}
              testID='text'
            />
            {loading ? loadingSpinkit : null}
          </>
        )
    }
  }, [mode, content, loading, disabled])

  const [layoutHeight, setLayoutHeight] = useState<number | undefined>()

  return (
    <Pressable
      accessible
      accessibilityLabel={accessibilityLabel}
      accessibilityHint={accessibilityHint}
      accessibilityRole='button'
      accessibilityState={{
        selected,
        disabled: disabled || selected,
        busy: loading
      }}
      style={[
        styles.button,
        {
          borderWidth: overlay ? 0 : 1,
          borderColor: mainColor,
          backgroundColor: colorBackground,
          paddingVertical: StyleConstants.Spacing[spacing],
          paddingHorizontal:
            StyleConstants.Spacing[spacing] + StyleConstants.Spacing.XS,
          width: round && layoutHeight ? layoutHeight : undefined
        },
        customStyle
      ]}
      {...(round && {
        onLayout: ({ nativeEvent }) =>
          setLayoutHeight(nativeEvent.layout.height)
      })}
      testID='base'
      onPress={onPress}
      children={children}
      disabled={selected || disabled || loading}
    />
  )
}

const styles = StyleSheet.create({
  button: {
    borderRadius: 100,
    justifyContent: 'center',
    alignItems: 'center'
  }
})

export default Button