import { genealogyContext } from "./genealogy/context.js";

const TOKEN_KEY = 'jiapu_token'

const normalizeToken = (token) => {
  if (typeof token !== 'string' || !token || token.trim() !== token) {
    throw new TypeError('会话令牌必须是无边界空白的非空字符串')
  }
  return token
}

const readToken = () => {
  const stored = uni.getStorageSync(TOKEN_KEY)
  if (stored === '' || stored === null || stored === undefined) return ''
  try {
    return normalizeToken(stored)
  } catch {
    // 损坏令牌与其账号作用域下的当前家谱必须一起失效，避免页面继续展示
    // 上一个账号的领域上下文。
    uni.removeStorageSync(TOKEN_KEY)
    genealogyContext.clearCurrentGenealogyId()
    return ''
  }
}

export const session = {
  getToken: readToken,
  saveToken: (token) => {
    const normalizedToken = normalizeToken(token)
    const previousToken = readToken()
    if (previousToken !== normalizedToken) {
      genealogyContext.clearCurrentGenealogyId()
    }
    uni.setStorageSync(TOKEN_KEY, normalizedToken)
    return normalizedToken
  },
  clear: () => {
    uni.removeStorageSync(TOKEN_KEY)
    genealogyContext.clearCurrentGenealogyId()
  }
}