import React from 'react'
import {observer} from 'mobx-react-lite'
import {Image, StyleSheet, Text, TouchableOpacity, View} from 'react-native'
import {bsky, AdxUri} from '@adxp/mock-api'
import {FontAwesomeIcon} from '@fortawesome/react-native-fontawesome'
import {PostThreadViewPostModel} from '../../../state/models/post-thread-view'
import {s, colors} from '../../lib/styles'
import {ago, pluralize} from '../../lib/strings'
import {AVIS} from '../../lib/assets'
import {useStores} from '../../../state'

function iter<T>(n: number, fn: (_i: number) => T): Array<T> {
  const arr: T[] = []
  for (let i = 0; i < n; i++) {
    arr.push(fn(i))
  }
  return arr
}

export const PostThreadItem = observer(function PostThreadItem({
  item,
  onPressShare,
}: {
  item: PostThreadViewPostModel
  onPressShare: (_uri: string) => void
}) {
  const store = useStores()
  const record = item.record as unknown as bsky.Post.Record
  const hasEngagement = item.likeCount || item.repostCount

  const onPressOuter = () => {
    const urip = new AdxUri(item.uri)
    store.nav.navigate(`/profile/${item.author.name}/post/${urip.recordKey}`)
  }
  const onPressAuthor = () => {
    store.nav.navigate(`/profile/${item.author.name}`)
  }
  const onPressLikes = () => {
    const urip = new AdxUri(item.uri)
    store.nav.navigate(
      `/profile/${item.author.name}/post/${urip.recordKey}/liked-by`,
    )
  }
  const onPressReposts = () => {
    const urip = new AdxUri(item.uri)
    store.nav.navigate(
      `/profile/${item.author.name}/post/${urip.recordKey}/reposted-by`,
    )
  }
  const onPressReply = () => {
    store.nav.navigate(`/composer?replyTo=${item.uri}`)
  }
  const onPressToggleRepost = () => {
    item
      .toggleRepost()
      .catch(e => console.error('Failed to toggle repost', record, e))
  }
  const onPressToggleLike = () => {
    item
      .toggleLike()
      .catch(e => console.error('Failed to toggle like', record, e))
  }

  return (
    <TouchableOpacity style={styles.outer} onPress={onPressOuter}>
      <View style={styles.layout}>
        {iter(Math.abs(item._depth), (i: number) => (
          <View key={i} style={styles.replyBar} />
        ))}
        <TouchableOpacity style={styles.layoutAvi} onPress={onPressAuthor}>
          <Image
            style={styles.avi}
            source={AVIS[item.author.name] || AVIS['alice.com']}
          />
        </TouchableOpacity>
        <View style={styles.layoutContent}>
          <View style={styles.meta}>
            <Text
              style={[styles.metaItem, s.f15, s.bold]}
              onPress={onPressAuthor}>
              {item.author.displayName}
            </Text>
            <Text
              style={[styles.metaItem, s.f14, s.gray5]}
              onPress={onPressAuthor}>
              @{item.author.name}
            </Text>
            <Text style={[styles.metaItem, s.f14, s.gray5]}>
              &middot; {ago(item.indexedAt)}
            </Text>
          </View>
          <Text
            style={[
              styles.postText,
              ...(item._isHighlightedPost
                ? [s.f16, s['lh16-1.3']]
                : [s.f15, s['lh15-1.3']]),
            ]}>
            {record.text}
          </Text>
          {item._isHighlightedPost && hasEngagement ? (
            <View style={styles.expandedInfo}>
              {item.repostCount ? (
                <Text
                  style={[styles.expandedInfoItem, s.gray5, s.semiBold]}
                  onPress={onPressReposts}>
                  <Text style={[s.bold, s.black]}>{item.repostCount}</Text>{' '}
                  {pluralize(item.repostCount, 'repost')}
                </Text>
              ) : (
                <></>
              )}
              {item.likeCount ? (
                <Text
                  style={[styles.expandedInfoItem, s.gray5, s.semiBold]}
                  onPress={onPressLikes}>
                  <Text style={[s.bold, s.black]}>{item.likeCount}</Text>{' '}
                  {pluralize(item.likeCount, 'like')}
                </Text>
              ) : (
                <></>
              )}
            </View>
          ) : (
            <></>
          )}
          <View style={styles.ctrls}>
            <TouchableOpacity style={styles.ctrl} onPress={onPressReply}>
              <FontAwesomeIcon
                style={styles.ctrlIcon}
                icon={['far', 'comment']}
              />
              <Text>{item.replyCount}</Text>
            </TouchableOpacity>
            <TouchableOpacity style={styles.ctrl} onPress={onPressToggleRepost}>
              <FontAwesomeIcon
                style={
                  item.myState.hasReposted
                    ? styles.ctrlIconReposted
                    : styles.ctrlIcon
                }
                icon="retweet"
                size={22}
              />
              <Text
                style={
                  item.myState.hasReposted ? [s.bold, s.green3] : undefined
                }>
                {item.repostCount}
              </Text>
            </TouchableOpacity>
            <TouchableOpacity style={styles.ctrl} onPress={onPressToggleLike}>
              <FontAwesomeIcon
                style={
                  item.myState.hasLiked ? styles.ctrlIconLiked : styles.ctrlIcon
                }
                icon={[item.myState.hasLiked ? 'fas' : 'far', 'heart']}
              />
              <Text
                style={item.myState.hasLiked ? [s.bold, s.pink3] : undefined}>
                {item.likeCount}
              </Text>
            </TouchableOpacity>
            <TouchableOpacity
              style={styles.ctrl}
              onPress={() => onPressShare(item.uri)}>
              <FontAwesomeIcon
                style={styles.ctrlIcon}
                icon="share-from-square"
              />
            </TouchableOpacity>
          </View>
        </View>
      </View>
    </TouchableOpacity>
  )
})

const styles = StyleSheet.create({
  outer: {
    marginTop: 1,
    backgroundColor: colors.white,
  },
  layout: {
    flexDirection: 'row',
  },
  replyBar: {
    width: 5,
    backgroundColor: colors.gray2,
    marginRight: 2,
  },
  layoutAvi: {
    width: 80,
    paddingLeft: 10,
    paddingTop: 10,
    paddingBottom: 10,
  },
  avi: {
    width: 60,
    height: 60,
    borderRadius: 30,
    resizeMode: 'cover',
  },
  layoutContent: {
    flex: 1,
    paddingRight: 10,
    paddingTop: 10,
    paddingBottom: 10,
  },
  meta: {
    flexDirection: 'row',
    paddingTop: 2,
    paddingBottom: 4,
  },
  metaItem: {
    paddingRight: 5,
  },
  postText: {
    paddingBottom: 5,
    fontFamily: 'Helvetica Neue',
  },
  expandedInfo: {
    flexDirection: 'row',
    padding: 10,
    borderColor: colors.gray2,
    borderTopWidth: 1,
    borderBottomWidth: 1,
    marginTop: 5,
    marginBottom: 10,
  },
  expandedInfoItem: {
    marginRight: 10,
  },
  ctrls: {
    flexDirection: 'row',
  },
  ctrl: {
    flexDirection: 'row',
    alignItems: 'center',
    flex: 1,
    paddingLeft: 4,
    paddingRight: 4,
  },
  ctrlIcon: {
    marginRight: 5,
    color: colors.gray5,
  },
  ctrlIconReposted: {
    marginRight: 5,
    color: colors.green3,
  },
  ctrlIconLiked: {
    marginRight: 5,
    color: colors.pink3,
  },
})