import localforage from "localforage"

import { KEYS } from "./keys/default.js"
import { Implementation, ImplementationOptions } from "../implementation.js"
import { assertBrowser } from "../../../common/browser.js"


export function getItem<T>(db: LocalForage, key: string): Promise<T | null> {
  assertBrowser("storage.getItem")
  return db.getItem(key)
}

export function setItem<T>(db: LocalForage, key: string, val: T): Promise<T> {
  assertBrowser("storage.setItem")
  return db.setItem(key, val)
}

export function removeItem(db: LocalForage, key: string): Promise<void> {
  assertBrowser("storage.removeItem")
  return db.removeItem(key)
}

export async function clear(db: LocalForage): Promise<void> {
  assertBrowser("storage.clear")
  return db.clear()
}



// 🛳


export function implementation({ name }: ImplementationOptions): Implementation {
  const db = localforage.createInstance({ name })

  return {
    KEYS,

    getItem: (...args) => getItem(db, ...args),
    setItem: (...args) => setItem(db, ...args),
    removeItem: (...args) => removeItem(db, ...args),
    clear: (...args) => clear(db, ...args),
  }
}