import React, {useEffect} from 'react'
import {
  ActivityIndicator,
  ScrollView,
  StyleSheet,
  TouchableOpacity,
  View,
} from 'react-native'
import {FontAwesomeIcon} from '@fortawesome/react-native-fontawesome'
import {observer} from 'mobx-react-lite'
import {useStores} from '../../state'
import {ScreenParams} from '../routes'
import {s} from '../lib/styles'
import {ViewHeader} from '../com/util/ViewHeader'
import {Link} from '../com/util/Link'
import {Text} from '../com/util/text/Text'
import * as Toast from '../com/util/Toast'
import {UserAvatar} from '../com/util/UserAvatar'
import {usePalette} from '../lib/hooks/usePalette'
import {AccountData} from '../../state/models/session'

export const Settings = observer(function Settings({
  navIdx,
  visible,
}: ScreenParams) {
  const pal = usePalette('default')
  const store = useStores()
  const [isSwitching, setIsSwitching] = React.useState(false)

  useEffect(() => {
    if (!visible) {
      return
    }
    store.shell.setMinimalShellMode(false)
    store.nav.setTitle(navIdx, 'Settings')
  }, [visible, store])

  const onPressSwitchAccount = async (acct: AccountData) => {
    setIsSwitching(true)
    if (await store.session.resumeSession(acct)) {
      setIsSwitching(false)
      Toast.show(`Signed in as ${acct.displayName || acct.handle}`)
      return
    }
    setIsSwitching(false)
    Toast.show('Sorry! We need you to enter your password.')
    store.session.clear()
  }
  const onPressAddAccount = () => {
    store.session.clear()
  }
  const onPressSignout = () => {
    store.session.logout()
  }

  return (
    <View style={[s.h100pct]} testID="settingsScreen">
      <ViewHeader title="Settings" />
      <ScrollView style={[s.mt10, s.pl10, s.pr10, s.h100pct]}>
        <View style={[s.flexRow]}>
          <Text type="xl-bold" style={pal.text}>
            Signed in as
          </Text>
          <View style={s.flex1} />
          <TouchableOpacity
            testID="signOutBtn"
            onPress={isSwitching ? undefined : onPressSignout}>
            <Text type="xl-medium" style={pal.link}>
              Sign out
            </Text>
          </TouchableOpacity>
        </View>
        {isSwitching ? (
          <View style={[pal.view, styles.profile]}>
            <ActivityIndicator />
          </View>
        ) : (
          <Link
            href={`/profile/${store.me.handle}`}
            title="Your profile"
            noFeedback>
            <View style={[pal.view, styles.profile]}>
              <UserAvatar
                size={40}
                displayName={store.me.displayName}
                handle={store.me.handle || ''}
                avatar={store.me.avatar}
              />
              <View style={[s.ml10]}>
                <Text type="xl-bold" style={pal.text}>
                  {store.me.displayName || store.me.handle}
                </Text>
                <Text style={pal.textLight}>@{store.me.handle}</Text>
              </View>
            </View>
          </Link>
        )}
        <Text type="sm-medium" style={pal.text}>
          Switch to:
        </Text>
        {store.session.switchableAccounts.map(account => (
          <TouchableOpacity
            testID={`switchToAccountBtn-${account.handle}`}
            key={account.did}
            style={[
              pal.view,
              styles.profile,
              s.mb2,
              isSwitching && styles.dimmed,
            ]}
            onPress={
              isSwitching ? undefined : () => onPressSwitchAccount(account)
            }>
            <UserAvatar
              size={40}
              displayName={account.displayName}
              handle={account.handle || ''}
              avatar={account.aviUrl}
            />
            <View style={[s.ml10]}>
              <Text type="xl-bold" style={pal.text}>
                {account.displayName || account.handle}
              </Text>
              <Text style={pal.textLight}>@{account.handle}</Text>
            </View>
          </TouchableOpacity>
        ))}
        <TouchableOpacity
          testID="switchToNewAccountBtn"
          style={[
            pal.view,
            styles.profile,
            s.mb2,
            {alignItems: 'center'},
            isSwitching && styles.dimmed,
          ]}
          onPress={isSwitching ? undefined : onPressAddAccount}>
          <FontAwesomeIcon icon="plus" />
          <View style={[s.ml5]}>
            <Text type="md-medium" style={pal.text}>
              Add account
            </Text>
          </View>
        </TouchableOpacity>
        <View style={{height: 50}} />
        <Text type="sm-medium" style={[s.mb5]}>
          Developer tools
        </Text>
        <Link
          style={[pal.view, s.p10, s.mb2]}
          href="/sys/log"
          title="System log">
          <Text style={pal.link}>System log</Text>
        </Link>
        <Link
          style={[pal.view, s.p10, s.mb2]}
          href="/sys/debug"
          title="Debug tools">
          <Text style={pal.link}>Storybook</Text>
        </Link>
        <View style={s.footerSpacer} />
      </ScrollView>
    </View>
  )
})

const styles = StyleSheet.create({
  dimmed: {
    opacity: 0.5,
  },
  title: {
    fontSize: 32,
    fontWeight: 'bold',
    marginTop: 20,
    marginBottom: 14,
  },
  profile: {
    flexDirection: 'row',
    marginVertical: 6,
    borderRadius: 4,
    paddingVertical: 10,
    paddingHorizontal: 10,
  },
  avi: {
    width: 40,
    height: 40,
    borderRadius: 30,
    marginRight: 8,
  },
})
