import React from 'react'
import {StyleSheet, View} from 'react-native'
import RNPickerSelect, {PickerSelectProps} from 'react-native-picker-select'
import {
  FontAwesomeIcon,
  FontAwesomeIconStyle,
} from '@fortawesome/react-native-fontawesome'
import {msg, Trans} from '@lingui/macro'
import {useLingui} from '@lingui/react'
import {useFocusEffect} from '@react-navigation/native'

import {APP_LANGUAGES, LANGUAGES} from '#/lib/../locale/languages'
import {IS_INTERNAL} from '#/lib/app-info'
import {usePalette} from '#/lib/hooks/usePalette'
import {useWebMediaQueries} from '#/lib/hooks/useWebMediaQueries'
import {CommonNavigatorParams, NativeStackScreenProps} from '#/lib/routes/types'
import {s} from '#/lib/styles'
import {sanitizeAppLanguageSetting} from '#/locale/helpers'
import {useModalControls} from '#/state/modals'
import {useLanguagePrefs, useLanguagePrefsApi} from '#/state/preferences'
import {useSetMinimalShellMode} from '#/state/shell'
import {Button} from '#/view/com/util/forms/Button'
import {Text} from '#/view/com/util/text/Text'
import {ViewHeader} from '#/view/com/util/ViewHeader'
import {CenteredView} from '#/view/com/util/Views'
import {LanguageSettingsScreen as NewLanguageSettingsScreen} from '#/screens/Settings/LanguageSettings'
import * as Layout from '#/components/Layout'

type Props = NativeStackScreenProps<CommonNavigatorParams, 'LanguageSettings'>

export function LanguageSettingsScreen(props: Props) {
  return IS_INTERNAL ? (
    <NewLanguageSettingsScreen {...props} />
  ) : (
    <LegacyLanguageSettingsScreen {...props} />
  )
}

function LegacyLanguageSettingsScreen(_props: Props) {
  const pal = usePalette('default')
  const {_} = useLingui()
  const langPrefs = useLanguagePrefs()
  const setLangPrefs = useLanguagePrefsApi()
  const {isTabletOrDesktop} = useWebMediaQueries()
  const setMinimalShellMode = useSetMinimalShellMode()
  const {openModal} = useModalControls()

  useFocusEffect(
    React.useCallback(() => {
      setMinimalShellMode(false)
    }, [setMinimalShellMode]),
  )

  const onPressContentLanguages = React.useCallback(() => {
    openModal({name: 'content-languages-settings'})
  }, [openModal])

  const onChangePrimaryLanguage = React.useCallback(
    (value: Parameters<PickerSelectProps['onValueChange']>[0]) => {
      if (!value) return
      if (langPrefs.primaryLanguage !== value) {
        setLangPrefs.setPrimaryLanguage(value)
      }
    },
    [langPrefs, setLangPrefs],
  )

  const onChangeAppLanguage = React.useCallback(
    (value: Parameters<PickerSelectProps['onValueChange']>[0]) => {
      if (!value) return
      if (langPrefs.appLanguage !== value) {
        setLangPrefs.setAppLanguage(sanitizeAppLanguageSetting(value))
      }
    },
    [langPrefs, setLangPrefs],
  )

  const myLanguages = React.useMemo(() => {
    return (
      langPrefs.contentLanguages
        .map(lang => LANGUAGES.find(l => l.code2 === lang))
        .filter(Boolean)
        // @ts-ignore
        .map(l => l.name)
        .join(', ')
    )
  }, [langPrefs.contentLanguages])

  return (
    <Layout.Screen testID="PreferencesLanguagesScreen">
      <CenteredView
        style={[
          pal.view,
          pal.border,
          styles.container,
          isTabletOrDesktop && styles.desktopContainer,
        ]}>
        <ViewHeader title={_(msg`Language Settings`)} showOnDesktop />

        <View style={{paddingTop: 20, paddingHorizontal: 20}}>
          {/* APP LANGUAGE */}
          <View style={{paddingBottom: 20}}>
            <Text type="title-sm" style={[pal.text, s.pb5]}>
              <Trans>App Language</Trans>
            </Text>
            <Text style={[pal.text, s.pb10]}>
              <Trans>
                Select your app language for the default text to display in the
                app.
              </Trans>
            </Text>

            <View style={{position: 'relative'}}>
              <RNPickerSelect
                placeholder={{}}
                value={sanitizeAppLanguageSetting(langPrefs.appLanguage)}
                onValueChange={onChangeAppLanguage}
                items={APP_LANGUAGES.filter(l => Boolean(l.code2)).map(l => ({
                  label: l.name,
                  value: l.code2,
                  key: l.code2,
                }))}
                style={{
                  inputAndroid: {
                    backgroundColor: pal.viewLight.backgroundColor,
                    color: pal.text.color,
                    fontSize: 14,
                    letterSpacing: 0.5,
                    fontWeight: '600',
                    paddingHorizontal: 14,
                    paddingVertical: 8,
                    borderRadius: 24,
                  },
                  inputIOS: {
                    backgroundColor: pal.viewLight.backgroundColor,
                    color: pal.text.color,
                    fontSize: 14,
                    letterSpacing: 0.5,
                    fontWeight: '600',
                    paddingHorizontal: 14,
                    paddingVertical: 8,
                    borderRadius: 24,
                  },

                  inputWeb: {
                    cursor: 'pointer',
                    // @ts-ignore web only
                    '-moz-appearance': 'none',
                    '-webkit-appearance': 'none',
                    appearance: 'none',
                    outline: 0,
                    borderWidth: 0,
                    backgroundColor: pal.viewLight.backgroundColor,
                    color: pal.text.color,
                    fontSize: 14,
                    fontFamily: 'inherit',
                    letterSpacing: 0.5,
                    fontWeight: '600',
                    paddingHorizontal: 14,
                    paddingVertical: 8,
                    borderRadius: 24,
                  },
                }}
              />

              <View
                style={{
                  position: 'absolute',
                  top: 1,
                  right: 1,
                  bottom: 1,
                  width: 40,
                  backgroundColor: pal.viewLight.backgroundColor,
                  borderRadius: 24,
                  pointerEvents: 'none',
                  alignItems: 'center',
                  justifyContent: 'center',
                }}>
                <FontAwesomeIcon
                  icon="chevron-down"
                  style={pal.text as FontAwesomeIconStyle}
                />
              </View>
            </View>
          </View>

          <View
            style={{
              height: 1,
              backgroundColor: pal.border.borderColor,
              marginBottom: 20,
            }}
          />

          {/* PRIMARY LANGUAGE */}
          <View style={{paddingBottom: 20}}>
            <Text type="title-sm" style={[pal.text, s.pb5]}>
              <Trans>Primary Language</Trans>
            </Text>
            <Text style={[pal.text, s.pb10]}>
              <Trans>
                Select your preferred language for translations in your feed.
              </Trans>
            </Text>

            <View style={{position: 'relative'}}>
              <RNPickerSelect
                placeholder={{}}
                value={langPrefs.primaryLanguage}
                onValueChange={onChangePrimaryLanguage}
                items={LANGUAGES.filter(l => Boolean(l.code2)).map(l => ({
                  label: l.name,
                  value: l.code2,
                  key: l.code2 + l.code3,
                }))}
                style={{
                  inputAndroid: {
                    backgroundColor: pal.viewLight.backgroundColor,
                    color: pal.text.color,
                    fontSize: 14,
                    letterSpacing: 0.5,
                    fontWeight: '600',
                    paddingHorizontal: 14,
                    paddingVertical: 8,
                    borderRadius: 24,
                  },
                  inputIOS: {
                    backgroundColor: pal.viewLight.backgroundColor,
                    color: pal.text.color,
                    fontSize: 14,
                    letterSpacing: 0.5,
                    fontWeight: '600',
                    paddingHorizontal: 14,
                    paddingVertical: 8,
                    borderRadius: 24,
                  },
                  inputWeb: {
                    cursor: 'pointer',
                    // @ts-ignore web only
                    '-moz-appearance': 'none',
                    '-webkit-appearance': 'none',
                    appearance: 'none',
                    outline: 0,
                    borderWidth: 0,
                    backgroundColor: pal.viewLight.backgroundColor,
                    color: pal.text.color,
                    fontSize: 14,
                    fontFamily: 'inherit',
                    letterSpacing: 0.5,
                    fontWeight: '600',
                    paddingHorizontal: 14,
                    paddingVertical: 8,
                    borderRadius: 24,
                  },
                }}
              />

              <View
                style={{
                  position: 'absolute',
                  top: 1,
                  right: 1,
                  bottom: 1,
                  width: 40,
                  backgroundColor: pal.viewLight.backgroundColor,
                  borderRadius: 24,
                  pointerEvents: 'none',
                  alignItems: 'center',
                  justifyContent: 'center',
                }}>
                <FontAwesomeIcon
                  icon="chevron-down"
                  style={pal.text as FontAwesomeIconStyle}
                />
              </View>
            </View>
          </View>

          <View
            style={{
              height: 1,
              backgroundColor: pal.border.borderColor,
              marginBottom: 20,
            }}
          />

          {/* CONTENT LANGUAGES */}
          <View style={{paddingBottom: 20}}>
            <Text type="title-sm" style={[pal.text, s.pb5]}>
              <Trans>Content Languages</Trans>
            </Text>
            <Text style={[pal.text, s.pb10]}>
              <Trans>
                Select which languages you want your subscribed feeds to
                include. If none are selected, all languages will be shown.
              </Trans>
            </Text>

            <Button
              type="default"
              onPress={onPressContentLanguages}
              style={styles.button}>
              <FontAwesomeIcon
                icon={myLanguages.length ? 'check' : 'plus'}
                style={pal.text as FontAwesomeIconStyle}
              />
              <Text
                type="button"
                style={[pal.text, {flexShrink: 1, overflow: 'hidden'}]}
                numberOfLines={1}>
                {myLanguages.length ? myLanguages : _(msg`Select languages`)}
              </Text>
            </Button>
          </View>
        </View>
      </CenteredView>
    </Layout.Screen>
  )
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    paddingBottom: 90,
  },
  desktopContainer: {
    borderLeftWidth: 1,
    borderRightWidth: 1,
    paddingBottom: 40,
  },
  button: {
    flexDirection: 'row',
    alignItems: 'center',
    gap: 8,
  },
})