export const TASK_DETAIL_DEMAND_TYPE_OPTIONS = ['新品', '优化'] as const

export type TaskDetailDemandType = (typeof TASK_DETAIL_DEMAND_TYPE_OPTIONS)[number]

export interface TaskDetailPrivacyFieldInput {
  taskDetailDemandType?: unknown
  taskDetailPrivate?: unknown
}

export interface NormalizedTaskDetailPrivacyFields {
  taskDetailDemandType: TaskDetailDemandType
  taskDetailPrivate: boolean
}

export function isTaskDetailDemandType(value: unknown): value is TaskDetailDemandType {
  return TASK_DETAIL_DEMAND_TYPE_OPTIONS.includes(value as TaskDetailDemandType)
}

export function normalizeTaskDetailPrivacyFields(
  input: TaskDetailPrivacyFieldInput,
): NormalizedTaskDetailPrivacyFields {
  const rawDemandType = input?.taskDetailDemandType
  const rawPrivate = input?.taskDetailPrivate

  let taskDetailDemandType: TaskDetailDemandType = '新品'
  if (rawDemandType != null) {
    if (typeof rawDemandType !== 'string') {
      throw new Error('需求类型只能是“新品”或“优化”')
    }

    const normalizedDemandType = rawDemandType.trim()
    if (!normalizedDemandType || !isTaskDetailDemandType(normalizedDemandType)) {
      throw new Error('需求类型只能是“新品”或“优化”')
    }

    taskDetailDemandType = normalizedDemandType
  }

  let taskDetailPrivate = false
  if (rawPrivate != null) {
    if (typeof rawPrivate !== 'boolean') {
      throw new Error('私密标记只能传 true 或 false')
    }

    taskDetailPrivate = rawPrivate
  }

  if (taskDetailPrivate && taskDetailDemandType !== '优化') {
    throw new Error('仅优化需求支持私密上传')
  }

  return {
    taskDetailDemandType,
    taskDetailPrivate,
  }
}