import {useCallback, useMemo, useState} from 'react'
import {LayoutAnimation, Pressable, View} from 'react-native'
import {Image} from 'expo-image'
import {
  AppBskyEmbedImages,
  AppBskyEmbedRecord,
  AppBskyEmbedRecordWithMedia,
  AppBskyFeedPost,
} from '@atproto/api'
import {msg} from '@lingui/macro'
import {useLingui} from '@lingui/react'

import {sanitizeDisplayName} from '#/lib/strings/display-names'
import {sanitizeHandle} from '#/lib/strings/handles'
import {type ComposerOptsPostRef} from '#/state/shell/composer'
import {PreviewableUserAvatar} from '#/view/com/util/UserAvatar'
import {atoms as a, useTheme, web} from '#/alf'
import {QuoteEmbed} from '#/components/Post/Embed'
import {Text} from '#/components/Typography'
import {useSimpleVerificationState} from '#/components/verification'
import {VerificationCheck} from '#/components/verification/VerificationCheck'
import {parseEmbed} from '#/types/bsky/post'

export function ComposerReplyTo({replyTo}: {replyTo: ComposerOptsPostRef}) {
  const t = useTheme()
  const {_} = useLingui()
  const {embed} = replyTo

  const [showFull, setShowFull] = useState(false)

  const onPress = useCallback(() => {
    setShowFull(prev => !prev)
    LayoutAnimation.configureNext({
      duration: 350,
      update: {type: 'spring', springDamping: 0.7},
    })
  }, [])

  const quoteEmbed = useMemo(() => {
    if (
      AppBskyEmbedRecord.isView(embed) &&
      AppBskyEmbedRecord.isViewRecord(embed.record) &&
      AppBskyFeedPost.isRecord(embed.record.value)
    ) {
      return embed
    } else if (
      AppBskyEmbedRecordWithMedia.isView(embed) &&
      AppBskyEmbedRecord.isViewRecord(embed.record.record) &&
      AppBskyFeedPost.isRecord(embed.record.record.value)
    ) {
      return embed.record
    }
    return null
  }, [embed])
  const parsedQuoteEmbed = quoteEmbed
    ? parseEmbed({
        $type: 'app.bsky.embed.record#view',
        ...quoteEmbed,
      })
    : null

  const images = useMemo(() => {
    if (AppBskyEmbedImages.isView(embed)) {
      return embed.images
    } else if (
      AppBskyEmbedRecordWithMedia.isView(embed) &&
      AppBskyEmbedImages.isView(embed.media)
    ) {
      return embed.media.images
    }
  }, [embed])

  const verification = useSimpleVerificationState({profile: replyTo.author})

  return (
    <Pressable
      style={[
        a.flex_row,
        a.align_start,
        a.pt_xs,
        a.pb_lg,
        a.mb_md,
        a.mx_lg,
        a.border_b,
        t.atoms.border_contrast_medium,
        web(a.user_select_text),
      ]}
      onPress={onPress}
      accessibilityRole="button"
      accessibilityLabel={_(
        msg`Expand or collapse the full post you are replying to`,
      )}
      accessibilityHint="">
      <PreviewableUserAvatar
        size={42}
        profile={replyTo.author}
        moderation={replyTo.moderation?.ui('avatar')}
        type={replyTo.author.associated?.labeler ? 'labeler' : 'user'}
        disableNavigation={true}
      />
      <View style={[a.flex_1, a.pl_md, a.pr_sm, a.gap_2xs]}>
        <View style={[a.flex_row, a.align_center, a.pr_xs]}>
          <Text
            style={[a.font_bold, a.text_md, a.leading_snug, a.flex_shrink]}
            numberOfLines={1}
            emoji>
            {sanitizeDisplayName(
              replyTo.author.displayName ||
                sanitizeHandle(replyTo.author.handle),
            )}
          </Text>
          {verification.showBadge && (
            <View style={[a.pl_xs]}>
              <VerificationCheck
                width={14}
                verifier={verification.role === 'verifier'}
              />
            </View>
          )}
        </View>
        <View style={[a.flex_row, a.gap_md]}>
          <View style={[a.flex_1, a.flex_grow]}>
            <Text
              style={[a.text_md, a.leading_snug, t.atoms.text_contrast_high]}
              numberOfLines={!showFull ? 6 : undefined}
              emoji>
              {replyTo.text}
            </Text>
          </View>
          {images && !replyTo.moderation?.ui('contentMedia').blur && (
            <ComposerReplyToImages images={images} showFull={showFull} />
          )}
        </View>
        {showFull && parsedQuoteEmbed && parsedQuoteEmbed.type === 'post' && (
          <QuoteEmbed embed={parsedQuoteEmbed} />
        )}
      </View>
    </Pressable>
  )
}

function ComposerReplyToImages({
  images,
}: {
  images: AppBskyEmbedImages.ViewImage[]
  showFull: boolean
}) {
  return (
    <View
      style={[
        a.rounded_xs,
        a.overflow_hidden,
        a.mt_2xs,
        a.mx_xs,
        {
          height: 64,
          width: 64,
        },
      ]}>
      {(images.length === 1 && (
        <Image
          source={{uri: images[0].thumb}}
          style={[a.flex_1]}
          cachePolicy="memory-disk"
          accessibilityIgnoresInvertColors
        />
      )) ||
        (images.length === 2 && (
          <View style={[a.flex_1, a.flex_row, a.gap_2xs]}>
            <Image
              source={{uri: images[0].thumb}}
              style={[a.flex_1]}
              cachePolicy="memory-disk"
              accessibilityIgnoresInvertColors
            />
            <Image
              source={{uri: images[1].thumb}}
              style={[a.flex_1]}
              cachePolicy="memory-disk"
              accessibilityIgnoresInvertColors
            />
          </View>
        )) ||
        (images.length === 3 && (
          <View style={[a.flex_1, a.flex_row, a.gap_2xs]}>
            <Image
              source={{uri: images[0].thumb}}
              style={[a.flex_1]}
              cachePolicy="memory-disk"
              accessibilityIgnoresInvertColors
            />
            <View style={[a.flex_1, a.gap_2xs]}>
              <Image
                source={{uri: images[1].thumb}}
                style={[a.flex_1]}
                cachePolicy="memory-disk"
                accessibilityIgnoresInvertColors
              />
              <Image
                source={{uri: images[2].thumb}}
                style={[a.flex_1]}
                cachePolicy="memory-disk"
                accessibilityIgnoresInvertColors
              />
            </View>
          </View>
        )) ||
        (images.length === 4 && (
          <View style={[a.flex_1, a.gap_2xs]}>
            <View style={[a.flex_1, a.flex_row, a.gap_2xs]}>
              <Image
                source={{uri: images[0].thumb}}
                style={[a.flex_1]}
                cachePolicy="memory-disk"
                accessibilityIgnoresInvertColors
              />
              <Image
                source={{uri: images[1].thumb}}
                style={[a.flex_1]}
                cachePolicy="memory-disk"
                accessibilityIgnoresInvertColors
              />
            </View>
            <View style={[a.flex_1, a.flex_row, a.gap_2xs]}>
              <Image
                source={{uri: images[2].thumb}}
                style={[a.flex_1]}
                cachePolicy="memory-disk"
                accessibilityIgnoresInvertColors
              />
              <Image
                source={{uri: images[3].thumb}}
                style={[a.flex_1]}
                cachePolicy="memory-disk"
                accessibilityIgnoresInvertColors
              />
            </View>
          </View>
        ))}
    </View>
  )
}