import { IStoreItem } from '../interfaces/IStoreItem'

const LOCAL_STORAGE_KEY = 'pdfer-data'

function readData(): IStoreItem[] {
  const dataString = localStorage.getItem(LOCAL_STORAGE_KEY)

  let data = []

  if (dataString) {
    data = JSON.parse(dataString)
  }

  return data
}

function storeData(data: IStoreItem[]): void {
  localStorage.setItem(LOCAL_STORAGE_KEY, JSON.stringify(data))
}

function withoutId(data: IStoreItem[], id: string) {
  return data.filter((item) => item.id !== id)
}

export function addDocument(templateData: IStoreItem) {
  const data = [templateData, ...withoutId(readData(), templateData.id)]
  storeData(data)
}

export function removeDocument(id: string) {
  const newData = withoutId(readData(), id)
  storeData(newData)
}

export function getDocuments() {
  return readData()
}