// src/commands/woAttachments.js
import { Readable } from 'stream';
import { listWorkOrderAttachments, downloadAttachmentById } from '../integrations/serviceChannel/attachments.js';
import botClient from '../integrations/webex/BotClient.js';
import { logger } from '../utils/logger.js';

export async function handleWoAttachments(bot, trigger) {
  logger('wo-attachments', 'Handler entered');

  const args = trigger.args || [];
  const woNumber = args[0]?.trim();

  if (!woNumber || !/^\d+$/.test(woNumber)) {
    logger('wo-attachments', 'Invalid or missing work order number', 'warn');
    await bot.reply(trigger.message, 
      'Please provide a valid work order number after /woAttachments\n' +
      '(e.g. `/woAttachments 345057944`)'
    );
    return;
  }

  logger('wo-attachments', `Processing attachments for work order ${woNumber}`);

  try {
    const attachments = await listWorkOrderAttachments(woNumber);

    if (attachments.length === 0) {
      logger('wo-attachments', `No attachments found for WO ${woNumber}`);
      await bot.reply(trigger.message, `No attachments found for work order **${woNumber}**.`);
      return;
    }

    logger('wo-attachments', `Found ${attachments.length} attachments for WO ${woNumber}`);
    await bot.reply(trigger.message, 
      `Found **${attachments.length}** attachment(s) for work order **${woNumber}**. Sending them now...`
    );

    for (const att of attachments) {
      try {
        const file = await downloadAttachmentById(woNumber, att.Id);

        await botClient.sendWithAttachment(
          trigger.message.roomId,
          file.buffer,
          file.fileName,
          file.contentType,
          `📎 Attachment from WO ${woNumber}: ${file.fileName}`
        );

        logger('wo-attachments', `Successfully sent attachment: ${file.fileName}`);

      } catch (err) {
        logger('wo-attachments', `Failed to send attachment ${att.Id || att.Name || 'unknown'}: ${err.message}`, 'error');
        await bot.reply(trigger.message, `❌ Failed to send attachment ${att.Id || att.Name || 'unknown'}`);
      }
    }

    await bot.reply(trigger.message, `Finished sending attachments for WO **${woNumber}**.`);
    logger('wo-attachments', `Completed processing attachments for WO ${woNumber}`);

  } catch (err) {
    logger('wo-attachments', `Error processing WO ${woNumber}: ${err.message}`, 'error');
    await bot.reply(trigger.message, 
      `Error processing attachments for work order ${woNumber}: ${err.message}`
    );
  }
}