import type { StoredMessage, Topic } from 'tinode-sdk';

import { Link } from 'react-router-dom';

import { Avatar } from '@/app/Avatar';
import { Icon } from '@/app/Icon';
import { SelectionCheckbox } from '@/app/SelectionCheckbox';
import { callResultDisplay, contactCardContentOf, isRecalled, isServerDeleted, systemNoticeText, type ContactCardContent } from '@/lib/messages/dispatch';
import { renderDrafty } from '@/lib/messages/drafty';
import { formatBubbleTime, formatEventTimestamp } from '@/lib/messages/time';
import { isFailedStatus, isSendingStatus, outgoingStatusLabel } from '@/lib/messages/status';
import { retryMessage } from '@/lib/tinode/send';
import { ensureTopicAttached } from '@/lib/tinode/topics';

/** 设计稿 4.3：气泡上方角色标签，边框样式（不是填色）-- 群主 #ff951c、管理员 #1677ff，均不加背景。
 *  与 GroupMembersModal/GroupDetailColumn 里另外两种角色标签（填色 tag、圆角数字角标）故意不共用
 *  一个组件：三处的视觉规格互不相同，抽象成一个带 variant 参数的组件不会比各写各的更清楚。 */
/** Distinct from a regular Drafty-rendered bubble -- see `contactCardContentOf`'s own doc comment
 *  for why this is dispatched by `head['x-im-type']` rather than a Drafty style tag. Tapping opens
 *  the real profile page, the one thing a contact-card message is fundamentally for. */
function ContactCardBubble({ content }: { content: ContactCardContent }) {
  const name = content.display_name || content.public_account || content.user_id;
  return (
    <Link to={`/contacts/${content.user_id}`} className="flex w-[220px] items-center gap-3 no-underline">
      <Avatar id={content.user_id} name={name} avatarFileId={content.avatar_file_id} className="h-11 w-11 flex-none rounded-lg text-base" />
      <span className="flex min-w-0 flex-col">
        <span className="truncate text-sm font-medium text-text-body">{name}</span>
        {content.public_account ? <span className="truncate text-xs text-text-tertiary-2">ID: {content.public_account}</span> : null}
      </span>
    </Link>
  );
}

function MessageRoleTag({ role }: { role: 'owner' | 'admin' | undefined }) {
  if (role === 'owner') return <span className="rounded-[3px] border border-warn px-1 text-[10px] leading-[14px] text-warn">群主</span>;
  if (role === 'admin') return <span className="rounded-[3px] border border-accent px-1 text-[10px] leading-[14px] text-accent">管理员</span>;
  return null;
}

interface MessageRowProps {
  topic: Topic;
  msg: StoredMessage;
  mine: boolean;
  isGroup: boolean;
  peerName: string;
  /** Only meaningful when `isGroup` -- the sender's real group-scoped name/role, resolved by
   *  ConversationView from its own member-list fetch. `peerName` alone is the GROUP's name, wrong
   *  for per-message attribution once there's more than one possible sender. */
  senderName?: string;
  senderRole?: 'owner' | 'admin' | 'member';
  /** The avatar to show for whoever sent THIS row -- resolved by ConversationView per-message (its
   *  own `avatar_file_id`, the group member's, or the peer's, depending on `mine`/`isGroup`), not a
   *  single fixed prop like `peerName`, since every row in a group can have a different sender. */
  avatarFileId?: string;
  selectMode?: boolean;
  selected?: boolean;
  /** README §3.5: "选中气泡加 outline:2px solid #1677ff" -- true while this message is the open
   *  context menu's target. */
  menuActive?: boolean;
  /** True for a few seconds right after jumping here from a 查找聊天记录 search result (ConversationView's
   *  scroll-to-message flow) -- a brief background flash, distinct from `menuActive`'s permanent-while-
   *  open outline, since the two states mean different things (context menu open vs. "you asked to find
   *  this one") and can't reuse the same visual without conflating them. */
  highlighted?: boolean;
  onToggleSelect?: (seq: number) => void;
  onContextMenu?: (e: React.MouseEvent, msg: StoredMessage) => void;
  /** Fired when the inline "重试" retry (below) itself fails -- e.g. still offline. Without this the
   *  failed-send icon just silently stays put with no feedback at all that the retry attempt was
   *  even made. */
  onError?: (message: string) => void;
}

export function MessageRow({
  topic,
  msg,
  mine,
  isGroup,
  peerName,
  senderName,
  senderRole,
  avatarFileId,
  selectMode,
  selected,
  menuActive,
  highlighted,
  onToggleSelect,
  onContextMenu,
  onError,
}: MessageRowProps) {
  if (isServerDeleted(msg)) {
    return (
      <div data-seq={msg.seq} className="py-1 text-center text-xs text-text-tertiary-4">
        此消息已被删除
      </div>
    );
  }

  const noticeText = systemNoticeText(msg);
  if (noticeText) {
    return (
      <div data-seq={msg.seq} className="flex flex-col items-center gap-1 py-1">
        <div className="text-xs text-text-tertiary-4">{noticeText}</div>
        {msg.ts ? <div className="text-xs text-text-tertiary-4">{formatEventTimestamp(msg.ts)}</div> : null}
      </div>
    );
  }

  const failed = isFailedStatus(topic, msg);
  const sending = isSendingStatus(topic, msg);
  const statusLabel = mine ? outgoingStatusLabel(topic, msg, isGroup) : msg.ts ? formatBubbleTime(msg.ts) : '';
  const callResult = callResultDisplay(msg, mine);
  const contactCard = contactCardContentOf(msg);

  const retry = () => {
    if (typeof msg.seq !== 'number') return;
    const seq = msg.seq;
    // The original send most likely failed BECAUSE the topic was detached (see ConversationView's
    // submit() for the same reasoning) -- retrying without re-attaching first would just fail the
    // exact same way again.
    ensureTopicAttached(topic.name)
      .then(() => retryMessage(topic, seq))
      .catch(() => onError?.('重试发送失败'));
  };

  return (
    <div data-seq={msg.seq} className={`flex items-center gap-2 ${highlighted ? 'animate-[jump-highlight_2s_ease-out]' : ''}`}>
      {selectMode ? (
        // A recalled message (content nulled out, rendered as the "⚠ 消息已删除" placeholder below)
        // has nothing real to forward/favorite -- an empty flex-none spacer of the same size keeps
        // every row's content left-edge aligned instead of the checkbox's absence shifting this one
        // row over, while still refusing to let it join a batch action.
        isRecalled(msg) ? (
          <div className="h-5 w-5 flex-none" />
        ) : (
          <button type="button" onClick={() => typeof msg.seq === 'number' && onToggleSelect?.(msg.seq)} className="flex-none">
            <SelectionCheckbox selected={selected} />
          </button>
        )
      ) : null}
      <div
        onContextMenu={(e) => {
          if (selectMode) return;
          e.preventDefault();
          onContextMenu?.(e, msg);
        }}
        className={`flex flex-1 items-start gap-2.5 ${mine ? 'flex-row-reverse' : ''}`}
      >
        {/* Group members' avatar/name go to their profile (same destination ContactCardBubble's own
            card already uses, which works for a non-friend group member too -- FriendProfileView's
            relationship-aware buttons handle that case, it isn't friends-only). Not for `mine` -- that
            slot always reads "我", and viewing "your own profile" via a route built around a two-party
            relationship isn't a case this app has ever needed to support. Not during `selectMode`
            either -- the checkbox is the only thing a tap in this row should do while bulk-selecting,
            not navigate away and lose whatever's already been picked. */}
        {isGroup && !mine && !selectMode && msg.from ? (
          <Link to={`/contacts/${msg.from}`} className="flex-none no-underline">
            <Avatar id={msg.from} name={senderName || msg.from} avatarFileId={avatarFileId} className="h-9 w-9 rounded-lg text-sm" />
          </Link>
        ) : (
          <Avatar
            id={msg.from || (isGroup ? '' : peerName)}
            name={mine ? '我' : isGroup ? senderName || msg.from : peerName}
            avatarFileId={avatarFileId}
            fallbackBgClass={mine ? 'bg-accent' : undefined}
            className="h-9 w-9 flex-none rounded-lg text-sm"
          />
        )}
        <div className={`flex max-w-[60%] flex-col gap-1 ${mine ? 'items-end' : 'items-start'}`}>
          {isGroup ? (
            <div className={`flex items-center gap-1 px-0.5 text-xs text-text-tertiary-4 ${mine ? 'flex-row-reverse' : ''}`}>
              {!mine && !selectMode && msg.from ? (
                <Link to={`/contacts/${msg.from}`} className="text-text-tertiary-4 no-underline hover:underline">
                  {senderName || msg.from}
                </Link>
              ) : (
                <span>{mine ? '我' : senderName || msg.from}</span>
              )}
              <MessageRoleTag role={senderRole === 'owner' || senderRole === 'admin' ? senderRole : undefined} />
            </div>
          ) : null}
          {/* README §3.2: the failed-send icon sits beside the bubble, not below it with the retry text.
              items-center (not -end) so the icon stays vertically centered on the bubble regardless of
              how many lines the bubble wraps to; no flex-row-reverse here (unlike the outer avatar row)
              -- this icon only ever appears on `mine` bubbles and belongs on the OUTER edge, away from
              the avatar, which is what the DOM order [icon, bubble] already gives without reversing it. */}
          <div className="flex items-center gap-1.5">
            {failed ? <Icon name="error" className="flex-none text-[20px] text-unread" /> : null}
            <div
              className={`px-3.5 py-2.5 text-[15px] leading-[1.55] break-words ${
                mine ? 'rounded-[12px_4px_12px_12px] bg-bubble-mine' : 'rounded-[4px_12px_12px_12px] bg-white shadow-bubble'
              } ${isRecalled(msg) ? 'text-text-tertiary-4 italic' : ''} ${menuActive ? 'outline outline-2 outline-offset-2 outline-accent' : ''}`}
            >
              {isRecalled(msg) ? (
                '⚠ 消息已删除'
              ) : callResult ? (
                <span className="flex items-center gap-1.5">
                  <Icon name={callResult.icon} className={`text-[18px] ${callResult.danger ? 'text-danger-text' : 'text-current'}`} />
                  {callResult.text}
                </span>
              ) : contactCard ? (
                <ContactCardBubble content={contactCard} />
              ) : (
                renderDrafty(msg.content)
              )}
            </div>
          </div>
          {failed ? (
            <button type="button" onClick={retry} className="text-xs text-unread">
              发送失败，点击重试
            </button>
          ) : (
            <span className="text-[11px] text-text-tertiary-3">{sending ? '发送中…' : statusLabel}</span>
          )}
        </div>
      </div>
    </div>
  );
}