/**
 * 共享的预测单操作按钮可见性逻辑
 * 3 角色 × 9 状态矩阵，detailStore 和 ActionButtons 组件共同消费
 */

export type Role = 'salesman' | 'planner' | 'manager'

/** 所有可能的操作 key */
export type ActionKey =
  | 'detail'
  | 'edit'
  | 'submit'
  | 'delete'
  | 'discard'
  | 'withdraw'
  | 'resubmit'
  | 'change'
  | 'convert'
  | 'review'
  | 'approve-change'

export interface ActionOptions {
  /** 是否已有单号（草稿有单号→作废，无单号→删除） */
  hasForecastOrderNo?: boolean
  /** 是否存在未完成的变更单 */
  hasPendingChange?: boolean
  /** 是否在详情视图（详情页不需要 'detail' 操作） */
  isDetailView?: boolean
}

/**
 * 根据状态和角色返回可用的操作 key 列表
 */
export function getAvailableActions(
  status: string,
  role: Role,
  options: ActionOptions = {},
): ActionKey[] {
  const {
    hasForecastOrderNo = false,
    hasPendingChange = false,
    isDetailView = false,
  } = options

  const actions: ActionKey[] = []

  // 所有角色、所有状态都可以查看详情（详情视图下不添加）
  if (!isDetailView) {
    actions.push('detail')
  }

  // ============================================================
  // 业务员 (salesman)
  // ============================================================
  if (role === 'salesman') {
    switch (status) {
      case 'DRAFT':
        actions.push('edit')
        // 详情视图不显示「提交」—— 提交应走编辑→表单→提交流程
        if (!isDetailView) {
          actions.push('submit')
        }
        if (hasForecastOrderNo) {
          actions.push('discard')
        } else {
          actions.push('delete')
        }
        break

      case 'SUBMITTED':
        actions.push('withdraw')
        break

      case 'REJECTED':
        actions.push('resubmit', 'discard')
        break

      case 'PLAN_RECEIVED':
      case 'SCHEDULED':
      case 'PARTIAL_CONVERTED':
        // 存在未完成变更单时，不显示「发起变更」
        if (!hasPendingChange) {
          actions.push('change')
        }
        break

      default:
        // FULL_CONVERTED, RELEASED, DISCARDED — 仅详情
        break
    }

    // SCHEDULED / PARTIAL_CONVERTED 额外显示转订单
    if (status === 'SCHEDULED' || status === 'PARTIAL_CONVERTED') {
      actions.push('convert')
    }
  }

  // ============================================================
  // 计划员 (planner)
  // ============================================================
  else if (role === 'planner') {
    if (status === 'SUBMITTED') {
      actions.push('review')
    }
  }

  // ============================================================
  // 销售经理 (manager)
  // ============================================================
  else if (role === 'manager') {
    if (hasPendingChange) {
      actions.push('approve-change')
    }
  }

  return actions
}