export type OaDeptValueItem = { id: string; name: string }

export function isDeptValueItem(v: unknown): v is OaDeptValueItem {
  if (!v || typeof v !== 'object') return false
  const o = v as Record<string, unknown>
  return String(o.id || '').trim() !== '' && String(o.name || '').trim() !== ''
}

/** 单选 → item|null；多选 → items（容错把单对象包成数组） */
export function normalizeDeptModelValue(
  raw: unknown,
  multiple: boolean
): OaDeptValueItem | OaDeptValueItem[] | null {
  if (multiple) {
    if (Array.isArray(raw)) {
      return raw.filter(isDeptValueItem).map((x) => ({
        id: String(x.id).trim(),
        name: String(x.name).trim()
      }))
    }
    if (isDeptValueItem(raw)) {
      return [{ id: String(raw.id).trim(), name: String(raw.name).trim() }]
    }
    return []
  }
  if (isDeptValueItem(raw)) {
    return { id: String(raw.id).trim(), name: String(raw.name).trim() }
  }
  if (Array.isArray(raw) && raw.length === 1 && isDeptValueItem(raw[0])) {
    return { id: String(raw[0].id).trim(), name: String(raw[0].name).trim() }
  }
  return null
}

export function formatDeptDisplay(raw: unknown): string {
  if (Array.isArray(raw)) {
    return raw
      .filter(isDeptValueItem)
      .map((x) => x.name)
      .filter(Boolean)
      .join('、')
  }
  if (isDeptValueItem(raw)) return raw.name
  return ''
}