import { App } from '@capacitor/app'
import { Browser } from '@capacitor/browser'
import { Capacitor } from '@capacitor/core'
import type { Router } from 'vue-router'

const ssoPaths = new Set(['/sso/callback', '/sso/bind'])
const nativeSsoStateKey = 'jiaowu_native_sso_state'

export function beginNativeSsoLogin() {
  if (!Capacitor.isNativePlatform()) return null
  const bytes = crypto.getRandomValues(new Uint8Array(32))
  const state = Array.from(bytes, byte => byte.toString(16).padStart(2, '0')).join('')
  localStorage.setItem(nativeSsoStateKey, state)
  return state
}

export function nativeSsoLoginState() {
  return Capacitor.isNativePlatform() ? localStorage.getItem(nativeSsoStateKey) : null
}

export function clearNativeSsoLoginState() {
  localStorage.removeItem(nativeSsoStateKey)
}

function appLinkRoute(url: string) {
  try {
    const target = new URL(url)
    if (target.protocol === 'mingxu:' && target.host === 'open' && ssoPaths.has(target.pathname)) {
      return target.pathname + target.search + target.hash
    }
    const publicBase = new URL(
      String(import.meta.env.VITE_PUBLIC_BASE_URL ?? location.origin),
    )
    return target.protocol === 'https:' &&
      target.origin === publicBase.origin &&
      ssoPaths.has(target.pathname)
      ? target.pathname + target.search + target.hash
      : null
  } catch {
    return null
  }
}

async function handleAppUrl(router: Router, url: string) {
  const route = appLinkRoute(url)
  if (!route) return
  await Browser.close().catch(() => undefined)
  await router.replace(route)
}

export async function initializeNativeAppLinks(router: Router) {
  if (!Capacitor.isNativePlatform()) return

  await App.addListener('appUrlOpen', event => {
    void handleAppUrl(router, event.url)
  })
  const launchUrl = await App.getLaunchUrl()
  if (launchUrl?.url) await handleAppUrl(router, launchUrl.url)
}

export async function openSsoLogin(url: string) {
  if (!Capacitor.isNativePlatform()) {
    window.location.assign(url)
    return
  }
  await Browser.open({ url, toolbarColor: '#173a50' })
}