const OfferModel = require('../models/OfferModel')
const WalletTransactionModel = require('../models/WalletTransactionModel')

const OFFER_REPLY_WINDOW_MS = 24 * 60 * 60 * 1000

/**
 * Called whenever a chat message is sent. If there's a pending paid Offer
 * between these two users, tracks the requester's first direct message and
 * the receiver's reply — the receiver's 30% commission is only credited if
 * they reply within 24 hours of that first message.
 */
async function trackOfferMessageForCommission (io, senderId, receiverId) {
  try {
    const offer = await OfferModel.findOne({
      $or: [
        { sender: senderId, receiver: receiverId },
        { sender: receiverId, receiver: senderId }
      ],
      commissionCredited: false,
      pendingCommissionAmount: { $gt: 0 }
    }).sort({ createdAt: -1 })

    if (!offer) return

    const isFromRequester = String(offer.sender) === String(senderId)

    if (isFromRequester) {
      if (!offer.firstMessageAt) {
        offer.firstMessageAt = new Date()
        offer.replyDeadline = new Date(Date.now() + OFFER_REPLY_WINDOW_MS)
        await offer.save()
      }
      return
    }

    // پیام از طرف گیرنده — کسی که باید ظرف ۲۴ ساعت پاسخ بدهد
    if (!offer.firstMessageAt || offer.repliedAt) return
    if (new Date() > offer.replyDeadline) return

    offer.repliedAt = new Date()
    offer.commissionCredited = true
    await offer.save()

    await WalletTransactionModel.create({
      user: offer.receiver,
      bucket: 'gift',
      type: 'credit',
      amount: offer.pendingCommissionAmount,
      referenceType: 'payment',
      referenceId: offer._id,
      description: 'سهم دریافتی از درخواست همکاری (۳۰٪، پس از پاسخ به‌موقع)'
    })

    if (io) {
      try {
        io.to(`user:${String(offer.receiver)}`).emit('notification', {
          type: 'offer_commission',
          title: 'واریز سهم درخواست همکاری',
          description: 'با پاسخ به‌موقع، ۳۰٪ مبلغ درخواست همکاری به کیف پول شما واریز شد.'
        })
      } catch (_) {}
    }
  } catch (error) {
    console.error('trackOfferMessageForCommission error:', error)
  }
}

module.exports = { trackOfferMessageForCommission, OFFER_REPLY_WINDOW_MS }