import { proto } from '@whiskeysockets/baileys';
import { NormalizedMessage, NormalizedReaction } from '@tower/types';

function extractText(msg: proto.IWebMessageInfo): string {
  const m = msg.message;
  if (!m) return '';
  return (
    m.conversation ||
    m.extendedTextMessage?.text ||
    m.imageMessage?.caption ||
    m.videoMessage?.caption ||
    m.documentMessage?.caption ||
    ''
  );
}

export function normalizeMessage(
  msg: proto.IWebMessageInfo,
  accountId: string,
): NormalizedMessage | null {
  const key = msg.key;
  if (!key) return null;

  const remoteJid = key.remoteJid ?? '';
  // only group messages (group JIDs end with @g.us)
  if (!remoteJid.endsWith('@g.us')) return null;
  // skip our own outgoing messages
  if (key.fromMe) return null;
  if (!msg.message) return null;

  const platformMsgId = key.id;
  if (!platformMsgId) return null;

  const content = extractText(msg);

  return {
    platformMsgId,
    sourceGroupJid: remoteJid,
    senderJid: key.participant ?? '',
    senderName: msg.pushName ?? undefined,
    content,
    accountId,
  };
}

export function normalizeReaction(
  msg: proto.IWebMessageInfo,
  accountId: string,
  selfJid?: string,
): NormalizedReaction | null {
  const key = msg.key;
  if (!key) return null;

  const remoteJid = key.remoteJid ?? '';
  // only group messages (group JIDs end with @g.us)
  if (!remoteJid.endsWith('@g.us')) return null;
  // Allow fromMe reactions — admin may star from the connected account

  const reaction = msg.message?.reactionMessage;
  if (!reaction) return null;

  const targetMsgId = reaction.key?.id;
  if (!targetMsgId) return null;

  // For fromMe reactions Baileys uses LID internally; use selfJid (PN format) to match TOWER_ADMIN_JIDS
  const reactorJid = key.fromMe ? (selfJid ?? key.participant) : key.participant;
  if (!reactorJid) return null;

  return {
    reactorJid,
    targetMsgId,
    sourceGroupJid: remoteJid,
    // emoji is empty string ('') when reaction was removed (retraction)
    emoji: reaction.text ?? '',
    accountId,
  };
}