#!/usr/bin/env node
/**
 * Find transcript channel messages whose embed "Users in transcript" lists a given member ID.
 * Usage: node scripts/find-transcript-by-member.js <channelId> <memberId> [maxMessages]
 * Example: node scripts/find-transcript-by-member.js 1335424071227281520 219276746153787392 500
 * Fetches in pages of 100; maxMessages limits total (e.g. 500 = 5 pages). Default 100.
 */
const path = require('path');
const { Client, GatewayIntentBits } = require('discord.js');

require('dotenv').config({ path: path.join(__dirname, '../.env') });
require('dotenv').config({ path: path.join(__dirname, '../../.env') });

const TOKEN = process.env.MEMBER_BOT_TOKEN || process.env.DISCORD_BOT_TOKEN;
const channelId = process.argv[2];
const memberId = process.argv[3];
const maxMessages = parseInt(process.argv[4], 10) || 100;
const PAGE = 100;

if (!TOKEN || !channelId || !memberId) {
  console.error('Usage: node scripts/find-transcript-by-member.js <channelId> <memberId> [maxMessages]');
  process.exit(1);
}

const client = new Client({
  intents: [GatewayIntentBits.Guilds, GatewayIntentBits.GuildMessages],
});

client.once('ready', async () => {
  try {
    const channel = await client.channels.fetch(channelId).catch(() => null);
    if (!channel) {
      console.log('Channel not found or bot cannot access it.');
      process.exit(0);
    }
    console.log('Channel:', channel.name, '(' + channel.id + ')');
    console.log('Looking for member ID', memberId, 'in embed "Users in transcript"');
    const memberRef = `<@${memberId}>`;
    let totalScanned = 0;
    let found = 0;
    let before = undefined;
    while (totalScanned < maxMessages) {
      const limit = Math.min(PAGE, maxMessages - totalScanned);
      const options = before ? { limit, before } : { limit };
      const messages = await channel.messages.fetch(options);
      if (messages.size === 0) break;
      totalScanned += messages.size;
      for (const [, m] of messages.sort((a, b) => b.createdTimestamp - a.createdTimestamp)) {
        if (!m.embeds?.length) continue;
        for (const emb of m.embeds) {
          const usersField = emb.fields?.find((f) => f.name && f.name.toLowerCase().includes('users in transcript'));
          if (!usersField?.value || !usersField.value.includes(memberRef)) continue;
          const ticketNameField = emb.fields?.find((f) => f.name && f.name.toLowerCase().includes('ticket name'));
          const ticketName = ticketNameField?.value?.trim() || '(no Ticket Name field)';
          console.log('\n--- Match ---');
          console.log('Message ID:', m.id);
          console.log('Created:', m.createdAt.toISOString());
          console.log('Ticket Name:', ticketName);
          console.log('Users in transcript:\n' + usersField.value);
          found++;
        }
      }
      const oldestMsg = messages.reduce((a, m) => (m.createdTimestamp < (a?.createdTimestamp ?? Infinity) ? m : a), null);
      before = oldestMsg?.id;
      if (messages.size < PAGE) break;
    }
    console.log('\nTotal messages scanned:', totalScanned);
    console.log('Total messages matching member', memberId, ':', found);
  } catch (e) {
    console.error(e.message || e);
  } finally {
    client.destroy();
    process.exit(0);
  }
});

client.login(TOKEN).catch((e) => {
  console.error('Login failed:', e.message);
  process.exit(1);
});