/** 店铺中心逐字段校验（任务 96）：账号/密码等店铺字段可独立校验，错误文案与后端 NotBlank/Size 一致；纯逻辑。 */
import type { ShopManageFormErrors, ShopManageFormValues } from './shop-manage-form-model.ts'

export const SHOP_MANAGE_ZN_USERNAME_MAX_LEN = 128

function requiredText(value: string): string {
  return (value || '').trim()
}

export function validateGroupId(value: number | null): string | undefined {
  return typeof value === 'number' && Number.isFinite(value) && value >= 1 ? undefined : '分组不能为空'
}

export function validateShopNameValue(value: string): string | undefined {
  return requiredText(value) ? undefined : '店铺名称不能为空'
}

export function validateMallNameValue(value: string): string | undefined {
  return requiredText(value) ? undefined : '商城名称不能为空'
}

export function validateAccount(value: string): string | undefined {
  return requiredText(value) ? undefined : '账号不能为空'
}

export function validatePassword(value: string): string | undefined {
  return requiredText(value) ? undefined : '密码不能为空'
}

export function validateZnUsernameLength(value: string): string | undefined {
  const trimmed = (value || '').trim()
  if (trimmed.length > SHOP_MANAGE_ZN_USERNAME_MAX_LEN) {
    return `自动化账号长度不能超过${SHOP_MANAGE_ZN_USERNAME_MAX_LEN}个字符`
  }
  return undefined
}

/** 汇总逐字段错误（供编辑/新增表单即时反馈）。 */
export function collectShopManageFieldErrors(form: ShopManageFormValues): ShopManageFormErrors {
  const errors: ShopManageFormErrors = {}
  const groupError = validateGroupId(form.groupId)
  if (groupError) errors.groupId = groupError
  const nameError = validateShopNameValue(form.shopName)
  if (nameError) errors.shopName = nameError
  const mallError = validateMallNameValue(form.mallName)
  if (mallError) errors.mallName = mallError
  const accountError = validateAccount(form.account)
  if (accountError) errors.account = accountError
  const passwordError = validatePassword(form.password)
  if (passwordError) errors.password = passwordError
  const znError = validateZnUsernameLength(form.znUsername)
  if (znError) errors.znUsername = znError
  return errors
}