/**
 * Auto-pin utility — pins a message with error handling and optional
 * system message suppression.
 *
 * Discord rate-limits pin operations to approximately 5 per second per
 * channel. Since pins only happen on ticket creation and escalation (low
 * frequency), no additional rate limiting is needed. The bot requires
 * MANAGE_MESSAGES permission to pin — if this is missing, the pin will
 * fail with code 50013 and be caught by the catch block.
 */
const { CONFIG } = require('../config');
const { logWarn } = require('./debugLog');

/**
 * Pin a message in a channel.
 * @param {import('discord.js').Message} message
 * @param {import('discord.js').Client} client
 */
async function pinMessage(message, client) {
  try {
    await message.pin();

    if (CONFIG.PIN_SUPPRESS_SYSTEM_MESSAGE) {
      await new Promise(r => setTimeout(r, 1000));
      const systemMessages = await message.channel.messages.fetch({ limit: 5 });
      const pinNotice = systemMessages.find(m =>
        m.type === 6 && // MessageType.ChannelPinnedMessage
        Date.now() - m.createdTimestamp < 10000
      );
      if (pinNotice) await pinNotice.delete().catch(() => {});
    }
  } catch (err) {
    if (err.code === 30003) {
      await logWarn('pinMessage', `Max pins reached in channel #${message.channel.name} — could not pin message.`, client).catch(() => {});
    } else {
      await logWarn('pinMessage', `Failed to pin message in #${message.channel.name}: ${err.message}`, client).catch(() => {});
    }
  }
}

module.exports = { pinMessage };