interface Options {
  ns: string
  st: 'localStorage' | 'sessionStorage'
}
export default class Storage {
  private ns: string
  private st
  constructor ({ ns = 'iot', st = 'localStorage' } = {} as Options) {
    this.ns = `hz_${location.pathname}@${ns}:`
    this.st = window[st]
  }

  async get (key) {
    let ret
    try {
      ret = JSON.parse(this.st[`${this.ns}${key}`])
    } catch (e) {
      //
    }
    return ret || null
  }

  async set (key, value) {
    try {
      if (value == null) {
        value = null
      }
      this.st[`${this.ns}${key}`] = JSON.stringify(value)
    } catch (e) {
      //
    }
    return this.get(key)
  }

  async remove (key) {
    delete this.st[`${this.ns}${key}`]
  }
}

const localStorage = new Storage()
export { localStorage }