const REASON_MAP = {
  duplicate_hash: {
    type: 'error',
    message: 'This file already exists in Skinbase. Please upload a different file.',
  },
  validation_failed: {
    type: 'error',
    message: 'Upload validation failed. Please check the file and try again.',
  },
  scan_failed: {
    type: 'error',
    message: 'Upload scan failed. Please try another file.',
  },
  quota_exceeded: {
    type: 'warning',
    message: 'Upload limit reached. Please wait before uploading again.',
  },
}

function normalizeType(value, fallback = 'error') {
  const normalized = String(value || '').toLowerCase()
  if (normalized === 'success' || normalized === 'warning' || normalized === 'error') return normalized
  return fallback
}

export function mapUploadErrorNotice(error, fallback = 'Upload failed.') {
  const status = Number(error?.response?.status || 0)
  const payload = error?.response?.data || {}
  const reason = String(payload?.reason || '').toLowerCase()
  const mapped = REASON_MAP[reason]
  const errorCode = String(error?.code || '').toUpperCase()
  const rawMessage = typeof error?.message === 'string' ? error.message.trim() : ''
  const timedOut = errorCode === 'ECONNABORTED' || /timeout/i.test(rawMessage)
  const requestTooLarge = status === 413

  const type = mapped?.type
    ? mapped.type
    : normalizeType(payload?.type || payload?.level, requestTooLarge ? 'warning' : (status >= 500 ? 'error' : 'warning'))

  const message =
    (requestTooLarge ? 'Server rejected this upload chunk as too large. Retrying with smaller chunks may help, or increase Nginx/PHP upload limits.' : '') ||
    (timedOut ? 'Upload request timed out before the server responded. Check Nginx/PHP-FPM body handling and try again.' : '') ||
    mapped?.message ||
    (typeof payload?.message === 'string' && payload.message.trim()) ||
    rawMessage ||
    fallback

  return {
    type,
    message,
    reason,
    status,
  }
}

export function mapUploadResultNotice(payload, options = {}) {
  const {
    fallbackType = 'success',
    fallbackMessage = 'Operation completed successfully.',
  } = options

  const reason = String(payload?.reason || '').toLowerCase()
  const mapped = REASON_MAP[reason]

  const type = mapped?.type || normalizeType(payload?.type || payload?.level, fallbackType)
  const message =
    mapped?.message ||
    (typeof payload?.message === 'string' && payload.message.trim()) ||
    fallbackMessage

  return {
    type,
    message,
    reason,
    status: Number(payload?.status_code || 0),
  }
}
