/** 软件版本列表加载模型（任务 127）：解析 /api/admin/versions data.items(snake)；纯逻辑。 */
import { unwrap } from '../../api/envelope.ts'
import { type SoftwareVersionItem, type SoftwareVersionList } from './version-dto.ts'

function text(value: unknown): string {
  return typeof value === 'string' ? value.trim() : ''
}

function numberOrNull(value: unknown): number | null {
  return typeof value === 'number' && Number.isFinite(value) ? Math.floor(value) : null
}

/** 解析单条软件版本行；缺 id 视为无效。 */
export function toSoftwareVersionItem(raw: unknown): SoftwareVersionItem | null {
  if (!raw || typeof raw !== 'object') return null
  const r = raw as Record<string, unknown>
  const id = numberOrNull(r.id)
  if (id === null) return null
  return {
    id,
    version: text(r.version),
    fileUrl: text(r.file_url ?? r.fileUrl),
    createdAt: text(r.created_at ?? r.createdAt),
  }
}

/** 归一化版本列表负载为前端结果；缺省回空列表。 */
export function parseSoftwareVersionList(payload: unknown): SoftwareVersionList {
  const data = unwrap<unknown>(payload)
  const record = data && typeof data === 'object' ? (data as Record<string, unknown>) : {}
  const items = Array.isArray(record.items)
    ? record.items.map((raw) => toSoftwareVersionItem(raw)).filter((item): item is SoftwareVersionItem => item !== null)
    : []
  return { items }
}

/** 上传成功后返回的新版本行（data.item）；无 item 回 null。 */
export function parseSoftwareVersionUpload(payload: unknown): SoftwareVersionItem | null {
  const data = unwrap<unknown>(payload)
  if (!data || typeof data !== 'object') return null
  const item = (data as Record<string, unknown>).item
  return item ? toSoftwareVersionItem(item) : null
}