const MessageModel = require('../models/MessageModel')
const UserModel = require('../models/UserModel')
const { enrichMessage, emitChatEvents } = require('../helpers/chatHelpers')
const { viewerIsBlockedBy } = require('./blockVisibility')

function storyMediaUrl (storagePath) {
  if (!storagePath) return ''
  const normalized = storagePath.replace(/\\/g, '/')
  const idx = normalized.indexOf('/storage/')
  if (idx >= 0) return normalized.slice(idx)
  return normalized.replace('/root/modstagram-back/storage', '/storage')
}

async function sendStoryReactionMessage ({
  io,
  senderId,
  receiverId,
  story,
  owner,
  reactionType,
  commentText
}) {
  if (!senderId || !receiverId || !story) return false
  if (String(senderId) === String(receiverId)) return false

  const receiver = await UserModel.findById(receiverId)
    .select('blocked_users')
    .lean()
  if (!receiver) return false
  if (viewerIsBlockedBy(receiver, senderId)) return false
  if (owner && viewerIsBlockedBy(owner, senderId)) return false

  const sharedStory = {
    storyId: String(story._id),
    mediaType: story.media_type,
    preview: storyMediaUrl(story.media_path),
    ownerUserName: owner?.user_name || '',
    ownerDisplayName:
      `${owner?.first_name || ''} ${owner?.last_name || ''}`.trim() ||
      owner?.user_name ||
      'کاربر',
    reactionType
  }

  const suffix =
    reactionType === 'like'
      ? '❤️'
      : (commentText || '').trim()

  const content = `${JSON.stringify({ sharedStory })}\n${suffix}`

  const newMessage = new MessageModel({
    senderId,
    receiverId,
    content
  })
  await newMessage.save()

  if (io) {
    const formatted = await enrichMessage(newMessage)
    emitChatEvents(io, formatted, senderId, receiverId)
  }

  return true
}

module.exports = {
  sendStoryReactionMessage,
  storyMediaUrl
}