import { DocDetail } from '@elog/types'

interface NoRepValues {
  tags: string[]
  categories: string[]
}

export function getNoRepValues(
  posts: DocDetail[],
  tagKey: string,
  categoryKey: string,
): NoRepValues {
  const values = posts.reduce(
    (acc: NoRepValues, cur) => {
      const tag = cur.properties[tagKey] as string | string[]
      const category = cur.properties[categoryKey] as string | string[]
      if (typeof tag === 'string') {
        acc.tags.push(tag)
      } else if (Array.isArray(tag)) {
        acc.tags = acc.tags.concat(tag)
      }
      if (typeof category === 'string') {
        acc.categories.push(category)
      } else if (Array.isArray(category)) {
        acc.categories = acc.categories.concat(category)
      }
      return acc
    },
    { tags: [], categories: [] },
  )
  // 去重
  return {
    tags: Array.from(new Set(values.tags)),
    categories: Array.from(new Set(values.categories)),
  }
}

interface AnyObject {
  [key: string]: any
}

/**
 * 删除对象中的空属性
 * @param obj
 */
export const removeEmptyProperties = (obj: AnyObject): AnyObject => {
  const filteredObj: AnyObject = {}

  Object.entries(obj).forEach(([key, value]) => {
    if (value !== null && value !== undefined && value !== '' && value.length !== 0) {
      filteredObj[key] = value
    }
  })

  return filteredObj
}