import { createRequestError } from './request-client.js'

const referralResponseError = (message) =>
  createRequestError(message, 'REFERRAL_RESPONSE_INVALID')

const normalizeReferralText = (value, field, { required = false } = {}) => {
  if (value === undefined || value === null) {
    if (required) throw referralResponseError(`推广关系响应缺少 ${field}`)
    return ''
  }
  if (typeof value !== 'string') throw referralResponseError(`推广关系响应 ${field} 无效`)
  const normalized = value.trim()
  if (required && !normalized) throw referralResponseError(`推广关系响应缺少 ${field}`)
  return normalized
}

export const normalizeReferralProfile = (value) => {
  if (!value || typeof value !== 'object' || Array.isArray(value)) {
    throw referralResponseError('推广关系响应无效')
  }
  const referralCode = normalizeReferralText(value.referralCode, 'referralCode', { required: true })
  if (!/^[A-Za-z0-9_-]{4,64}$/.test(referralCode)) {
    throw referralResponseError('推广关系响应 referralCode 格式无效')
  }
  if (!Number.isSafeInteger(value.referredUserCount) || value.referredUserCount < 0) {
    throw referralResponseError('推广关系响应 referredUserCount 无效')
  }
  const shareUrl = normalizeReferralText(value.shareUrl, 'shareUrl', { required: true })
  if (!/^https:\/\/[^\s]+$/i.test(shareUrl)) {
    throw referralResponseError('推广关系响应 shareUrl 必须是 HTTPS 链接')
  }
  return {
    enabled: true,
    disabledReason: '',
    referralCode,
    referredUserCount: value.referredUserCount,
    shareTitle: normalizeReferralText(value.shareTitle, 'shareTitle', { required: true }),
    shareDescription: normalizeReferralText(value.shareText, 'shareText', { required: true }),
    shareUrl
  }
}