/*
 * logic.ts
 * Copyright (C) 2024 veypi <i@veypi.com>
 * 2024-10-24 16:36
 * Distributed under terms of the GPL license.
 */
import bus from './bus'
import api, { apitoken } from './api'
import * as typs from './typs'
import { proxy } from './v2dom'

class Token {
  iat?: string
  iss?: string
  jti?: string
  exp?: number
  aid?: string
  icon?: string
  name?: string
  uid?: string
  access?: typs.Auths
  private _raw: string
  private _typ: 'refresh' | 'oa' | 'app'
  constructor(typ: 'refresh' | 'oa' | 'app') {
    this._typ = typ
    this._raw = localStorage.getItem(typ) || ''
    if (this._raw) {
      this.set(this._raw)
    }
  }
  isVaild() {
    if (this.exp) {
      const now = Math.floor(Date.now() / 1000);
      return now < this.exp
    }
    return false
  }
  set(t: string) {
    try {
      const parts = t.split('.');
      // header = JSON.parse(atob(parts[0]));
      let body = JSON.parse(atob(parts[1]));
      // sign = parts[2]
      this._raw = t
      Object.assign(this, body)
      this.access = typs.NewAuths(body.access || [])
      localStorage.setItem(this._typ, t)
    } catch (error) {
      console.warn('Error parsing JWT:', error);
    }
  }
  clear() {
    localStorage.removeItem(this._typ)
    this.exp = undefined
  }
  raw() {
    return this._raw
  }
  update() {
    return new Promise<Token>((resolve, reject) => {
      if (!logic.token.refresh.isVaild() || this._typ === 'refresh') {
        reject()
      }
      if (this.isVaild()) {
        return resolve(this)
      }
      let aid = logic.oa_id
      if (this._typ === 'app') {
        aid = logic.app_id
      }
      api.token.Post({ refresh: logic.token.refresh.raw(), user_id: logic.token.refresh.uid!, app_id: aid }, { needRetry: false }).then(e => {
        if (this._typ === 'oa' && logic.app_id == logic.oa_id) {
          logic.token.app.set(e)
        }
        this.set(e)
        resolve(this)
      }).catch(e => {
        console.warn(`refresh token failed: ${e.err || e} `)
        bus.emit('logout')
        reject()
      })
    })
  }
}

// interface Token {
//   aid: string
//   exp: number
//   iat: string
//   icon: string
//   iss: string
//   jti: string
//   name: string
//   uid: string
//   isVaild: () => boolean
//   row: () => string
// }

const logic = proxy.Watch({
  oa_id: '',
  app_id: '',
  token: {
    refresh: {} as Token,
    oa: {} as Token,
    app: {} as Token,
  },

  user: {} as typs.User,
  myapps: [
    { name: 'a' },
    { name: 'b' },
  ],
  ready: false,
  getDetailUser() {
    api.user.Get(logic.token.oa.uid!).then((u) => {
      Object.assign(logic.user, u)
    })
  },
  init: () => {
    return new Promise<Token>((resolve, reject) => {
      api.info().then(e => {
        logic.oa_id = e.id
        if (logic.token.refresh.isVaild()) {
          logic.app_id = logic.token.refresh.aid!
          logic.token.oa.update().then((e) => {
            apitoken.value = e.raw()
            apitoken.set_updator(() => new Promise<string>((resolve, reject) => {
              logic.token.oa.update().then(e => { resolve(e.raw()) }).catch(() => reject)
            })
            )
            logic.getDetailUser()
            if (logic.app_id !== logic.oa_id) {
              logic.token.app.update().then((e) => {
                logic.ready = true
                resolve(e);
              }).catch((e) => reject(e))
            } else {
              logic.ready = true
              resolve(e);
            }
          }).catch((e) => {
            reject(e)
          })
        } else {
          reject()
        }
      }).catch(e => {
        console.warn(`can not get info from ${logic.host}: ${e} `)
        reject(e);
      })
    })
  },
  host: window.location.origin,
  Host() {
    return logic.host
  },
  urlwarp(url: string) {
    let h = logic.host
    if (!url) {
      return ''
    }
    if (url.startsWith('http')) {
      return url
    }
    if (!url.startsWith('/')) {
      url = '/' + url
    }
    return h + url
  },
  goto(url: string) {
    window.location.href = logic.urlwarp(url)
  },
})

bus.on('login', () => {
  logic.goto('/login')
})
bus.on('logout', () => {
  logic.ready = false
  logic.token.refresh.clear()
  logic.token.oa.clear()
  logic.token.app.clear()
})

// load token from localStorage
logic.token.refresh = new Token('refresh')
logic.app_id = logic.token.refresh.aid || ''
logic.token.oa = new Token('oa')
logic.token.app = new Token('app')

export default logic