const fs = require('fs-extra')
const path = require('path')
const axios = require('axios')
const { optimizeImageFile } = require('./imageOptimize')

const EXT_BY_CONTENT_TYPE = {
  'image/png': '.png',
  'image/webp': '.webp',
  'image/gif': '.gif',
  'image/jpeg': '.jpg',
}

/**
 * Downloads a remote image and stores it under storage/profiles, the same
 * directory setProfileImageController.js already uses for avatar uploads.
 * Returns the relative "/profiles/<file>" path expected on UserModel.profile_image.
 */
async function downloadImageToProfiles(url, baseName) {
  const uploadDir = path.join(__dirname, '../storage/profiles')
  if (!fs.existsSync(uploadDir)) {
    fs.mkdirSync(uploadDir, { recursive: true })
  }

  const response = await axios.get(url, {
    responseType: 'arraybuffer',
    timeout: 10000,
  })

  const contentType = String(response.headers['content-type'] || '').split(';')[0].trim()
  const ext = EXT_BY_CONTENT_TYPE[contentType] || '.jpg'
  const safeBaseName = String(baseName || 'user').replace(/[^\w.\-]/g, '_')
  const uniqueFileName = `${safeBaseName}-${Date.now()}${ext}`
  const filePath = path.join(uploadDir, uniqueFileName)

  await fs.writeFile(filePath, Buffer.from(response.data))
  await optimizeImageFile(filePath, { maxDimension: 800 })

  return `/profiles/${uniqueFileName}`
}

module.exports = { downloadImageToProfiles }