import Cookies from "cookies-js";
import jwt_decode from "jwt-decode";
const TokenCookieName = "ktusaktutoken";

// initial state
const state = () => ({
  token: null,
  tokenData: null,
});

// getters
const getters = {
  isValid(state) {
    if (state.token == null || state.tokenData == null) return false;
    const d = state.tokenData;
    if (
      d.iss !==
      "https://login.microsoftonline.com/3415f2f7-f5a8-4092-b52a-003aaf844853/v2.0"
    )
      return false;

    if (d.aud !== "5931fda0-e9e0-4754-80c2-18bcb9d9561a") return false;
    const now = new Date();
    const exp = new Date(d.exp * 1000);
    if (now > exp) return false;
    return true;
  },
  email(state, getters) {
    if (!getters.isValid) return null;
    return state.tokenData.email;
  },
  userId(state, getters) {
    if (!getters.isValid) return null;
    return state.tokenData.email;
  },
};

// actions
const actions = {
  async loadToken({ commit }) {
    const token = Cookies.get(TokenCookieName);
    commit("setToken", token);
    commit("computeTokenVars");
  },
  async setToken({ commit }, token) {
    Cookies.set(TokenCookieName, token);
    commit("setToken", token);
    commit("computeTokenVars");
  },
};

// mutations
const mutations = {
  setToken(state, token) {
    state.token = token;
  },
  computeTokenVars(state) {
    if (state.token == null) return;
    try {
      state.tokenData = jwt_decode(state.token);
    } catch {
      console.log("Token was invalid.");
      state.tokenData = null;
      state.token = null;
    }
  },
};

export default {
  namespaced: true,
  state,
  getters,
  actions,
  mutations,
};