import itemStyles from './item.module.css'
import styles from './comment.module.css'
import Text, { SearchText } from './text'
import Link from 'next/link'
import Reply, { ReplyOnAnotherPage } from './reply'
import { useEffect, useMemo, useRef, useState } from 'react'
import UpVote from './upvote'
import Eye from '@/svgs/eye-fill.svg'
import EyeClose from '@/svgs/eye-close-line.svg'
import { useRouter } from 'next/router'
import CommentEdit from './comment-edit'
import { USER_ID, COMMENT_DEPTH_LIMIT, UNKNOWN_LINK_REL } from '@/lib/constants'
import PayBounty from './pay-bounty'
import BountyIcon from '@/svgs/bounty-bag.svg'
import ActionTooltip from './action-tooltip'
import { numWithUnits } from '@/lib/format'
import Share from './share'
import ItemInfo from './item-info'
import Badge from 'react-bootstrap/Badge'
import { RootProvider, useRoot } from './root'
import { useMe } from './me'
import { useQuoteReply } from './use-quote-reply'
import { DownZap } from './dont-link-this'
import Skull from '@/svgs/death-skull.svg'
import { commentSubTreeRootId } from '@/lib/item'
import Pin from '@/svgs/pushpin-fill.svg'
import LinkToContext from './link-to-context'
import { ItemContextProvider, useItemContext } from './item'

function Parent ({ item, rootText }) {
  const root = useRoot()

  const ParentFrag = () => (
    <>
      <span> \ </span>
      <Link href={`/items/${item.parentId}`} className='text-reset'>
        parent
      </Link>
    </>
  )

  return (
    <>
      {Number(root.id) !== Number(item.parentId) && <ParentFrag />}
      <span> \ </span>
      <Link href={`/items/${root.id}`} className='text-reset'>
        {rootText || 'on:'} {root?.title}
      </Link>
      {root.subName &&
        <Link href={`/~${root.subName}`}>
          {' '}<Badge className={itemStyles.newComment} bg={null}>{root.subName}</Badge>
        </Link>}
    </>
  )
}

const truncateString = (string = '', maxLength = 140) =>
  string.length > maxLength
    ? `${string.substring(0, maxLength)} […]`
    : string

export function CommentFlat ({ item, rank, siblingComments, ...props }) {
  const router = useRouter()
  const [href, as] = useMemo(() => {
    const rootId = commentSubTreeRootId(item)
    return [{
      pathname: '/items/[id]',
      query: { id: rootId, commentId: item.id }
    }, `/items/${rootId}`]
  }, [item?.id])

  return (
    <>
      {rank
        ? (
          <div className={`${itemStyles.rank} pt-2 align-self-start`}>
            {rank}
          </div>)
        : <div />}
      <LinkToContext
        className={siblingComments ? 'py-3' : 'py-2'}
        onClick={e => {
          router.push(href, as)
        }}
        href={href}
      >
        <RootProvider root={item.root}>
          <Comment item={item} {...props} />
        </RootProvider>
      </LinkToContext>
    </>
  )
}

export default function Comment ({
  item, children, replyOpen, includeParent, topLevel,
  rootText, noComments, noReply, truncate, depth, pin
}) {
  const [edit, setEdit] = useState()
  const me = useMe()
  const isHiddenFreebie = !me?.privates?.wildWestMode && !me?.privates?.greeterMode && !item.mine && item.freebie && !item.freedFreebie
  const [collapse, setCollapse] = useState(
    (isHiddenFreebie || item?.user?.meMute || (item?.outlawed && !me?.privates?.wildWestMode)) && !includeParent
      ? 'yep'
      : 'nope')
  const ref = useRef(null)
  const router = useRouter()
  const root = useRoot()
  const { ref: textRef, quote, quoteReply, cancelQuote } = useQuoteReply({ text: item.text })

  useEffect(() => {
    setCollapse(window.localStorage.getItem(`commentCollapse:${item.id}`) || collapse)
    if (Number(router.query.commentId) === Number(item.id)) {
      // HACK wait for other comments to collapse if they're collapsed
      setTimeout(() => {
        ref.current.scrollIntoView({ behavior: 'instant', block: 'start' })
        ref.current.classList.add('outline-it')
      }, 100)
    }
  }, [item.id, router.query.commentId])

  useEffect(() => {
    if (router.query.commentsViewedAt &&
        me?.id !== item.user?.id &&
        new Date(item.createdAt).getTime() > router.query.commentsViewedAt) {
      ref.current.classList.add('outline-new-comment')
    }
  }, [item.id])

  const bottomedOut = depth === COMMENT_DEPTH_LIMIT
  // Don't show OP badge when anon user comments on anon user posts
  const op = root.user.name === item.user.name && Number(item.user.id) !== USER_ID.anon
    ? 'OP'
    : root.forwards?.some(f => f.user.name === item.user.name) && Number(item.user.id) !== USER_ID.anon
      ? 'fwd'
      : null
  const bountyPaid = root.bountyPaidTo?.includes(Number(item.id))

  return (
    <ItemContextProvider>
      <div
        ref={ref} className={includeParent ? '' : `${styles.comment} ${collapse === 'yep' ? styles.collapsed : ''}`}
        onMouseEnter={() => ref.current.classList.add('outline-new-comment-unset')}
        onTouchStart={() => ref.current.classList.add('outline-new-comment-unset')}
      >
        <div className={`${itemStyles.item} ${styles.item}`}>
          <ZapIcon item={item} pin={pin} me={me} />
          <div className={`${itemStyles.hunk} ${styles.hunk}`}>
            <div className='d-flex align-items-center'>
              {item.user?.meMute && !includeParent && collapse === 'yep'
                ? (
                  <span
                    className={`${itemStyles.other} ${styles.other} pointer`} onClick={() => {
                      setCollapse('nope')
                      window.localStorage.setItem(`commentCollapse:${item.id}`, 'nope')
                    }}
                  >reply from someone you muted
                  </span>)
                : <ItemInfo
                    item={item}
                    commentsText='replies'
                    commentTextSingular='reply'
                    className={`${itemStyles.other} ${styles.other}`}
                    embellishUser={op && <><span> </span><Badge bg={op === 'fwd' ? 'secondary' : 'boost'} className={`${styles.op} bg-opacity-75`}>{op}</Badge></>}
                    onQuoteReply={quoteReply}
                    nested={!includeParent}
                    extraInfo={
                      <>
                        {includeParent && <Parent item={item} rootText={rootText} />}
                        {bountyPaid &&
                          <ActionTooltip notForm overlayText={`${numWithUnits(root.bounty)} paid`}>
                            <BountyIcon className={`${styles.bountyIcon} ${'fill-success vertical-align-middle'}`} height={16} width={16} />
                          </ActionTooltip>}
                      </>
                  }
                    onEdit={e => { setEdit(!edit) }}
                    editText={edit ? 'cancel' : 'edit'}
                  />}

              {!includeParent && (collapse === 'yep'
                ? <Eye
                    className={styles.collapser} height={10} width={10} onClick={() => {
                      setCollapse('nope')
                      window.localStorage.setItem(`commentCollapse:${item.id}`, 'nope')
                    }}
                  />
                : <EyeClose
                    className={styles.collapser} height={10} width={10} onClick={() => {
                      setCollapse('yep')
                      window.localStorage.setItem(`commentCollapse:${item.id}`, 'yep')
                    }}
                  />)}
              {topLevel && (
                <span className='d-flex ms-auto align-items-center'>
                  <Share title={item?.title} path={`/items/${item?.id}`} />
                </span>
              )}
            </div>
            {edit
              ? (
                <CommentEdit
                  comment={item}
                  onSuccess={() => {
                    setEdit(!edit)
                  }}
                />
                )
              : (
                <div className={styles.text} ref={textRef}>
                  {item.searchText
                    ? <SearchText text={item.searchText} />
                    : (
                      <Text itemId={item.id} topLevel={topLevel} rel={item.rel ?? UNKNOWN_LINK_REL} outlawed={item.outlawed} imgproxyUrls={item.imgproxyUrls}>
                        {item.outlawed && !me?.privates?.wildWestMode
                          ? '*stackers have outlawed this. turn on wild west mode in your [settings](/settings) to see outlawed content.*'
                          : truncate ? truncateString(item.text) : item.text}
                      </Text>)}
                </div>
                )}
          </div>
        </div>
        {collapse !== 'yep' && (
          bottomedOut
            ? <div className={styles.children}><ReplyOnAnotherPage item={item} /></div>
            : (
              <div className={styles.children}>
                {item.outlawed && !me?.privates?.wildWestMode
                  ? <div className='py-2' />
                  : !noReply &&
                    <Reply depth={depth + 1} item={item} replyOpen={replyOpen} onCancelQuote={cancelQuote} onQuoteReply={quoteReply} quote={quote}>
                      {root.bounty && !bountyPaid && <PayBounty item={item} />}
                    </Reply>}
                {children}
                <div className={styles.comments}>
                  {item.comments && !noComments
                    ? item.comments.map((item) => (
                      <Comment depth={depth + 1} key={item.id} item={item} />
                    ))
                    : null}
                </div>
              </div>
              )
        )}
      </div>
    </ItemContextProvider>
  )
}

function ZapIcon ({ item, pin }) {
  const me = useMe()
  const { pendingSats, pendingDownSats } = useItemContext()

  const meSats = item.meSats + pendingSats
  const downSats = item.meDontLikeSats + pendingDownSats

  return item.outlawed && !me?.privates?.wildWestMode
    ? <Skull className={styles.dontLike} width={24} height={24} />
    : downSats > meSats
      ? <DownZap width={24} height={24} className={styles.dontLike} item={item} />
      : pin ? <Pin width={22} height={22} className={styles.pin} /> : <UpVote item={item} className={styles.upvote} />
}

export function CommentSkeleton ({ skeletonChildren }) {
  return (
    <div className={styles.comment}>
      <div className={`${itemStyles.item} ${itemStyles.skeleton} ${styles.item} ${styles.skeleton}`}>
        <UpVote className={styles.upvote} />
        <div className={`${itemStyles.hunk} ${styles.hunk}`}>
          <div className={itemStyles.other}>
            <span className={`${itemStyles.otherItem} clouds`} />
            <span className={`${itemStyles.otherItem} clouds`} />
            <span className={`${itemStyles.otherItem} clouds`} />
            <span className={`${itemStyles.otherItem} ${itemStyles.otherItemLonger} clouds`} />
          </div>
          <div className={`${styles.text} clouds`} />
        </div>
      </div>
      <div className={`${itemStyles.children} ${styles.children} ${styles.skeleton}`}>
        <div className={styles.replyPadder}>
          <div className={`${itemStyles.other} ${styles.reply} clouds`} />
        </div>
        <div className={`${styles.comments} ms-sm-1 ms-md-3`}>
          {skeletonChildren
            ? <CommentSkeleton skeletonChildren={skeletonChildren - 1} />
            : null}
        </div>
      </div>
    </div>
  )
}