import { API_BASE_URL, GITHUB_CLIENT_ID, toast } from '../main'
import { setToken, loadCurrentUser } from './auth'

export function githubAuthorize(state = '') {
  if (!GITHUB_CLIENT_ID) {
    toast.error('GitHub 登录不可用')
    return
  }
  const redirectUri = `${window.location.origin}/github-callback`
  const url = `https://github.com/login/oauth/authorize?client_id=${GITHUB_CLIENT_ID}&redirect_uri=${encodeURIComponent(redirectUri)}&scope=user:email&state=${state}`
  window.location.href = url
}

export async function githubExchange(code, state, reason) {
  try {
    const res = await fetch(`${API_BASE_URL}/api/auth/github`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ code, redirectUri: `${window.location.origin}/github-callback`, reason, state })
    })
    const data = await res.json()
    if (res.ok && data.token) {
      setToken(data.token)
      await loadCurrentUser()
      toast.success('登录成功')
      return true
    } else if (data.reason_code === 'NOT_APPROVED') {
      toast.info('当前为注册审核模式，请填写注册理由')
      sessionStorage.setItem('github_code', code)
      return 'NEED_REASON'
    } else if (data.reason_code === 'IS_APPROVING') {
      toast.info('您的注册理由正在审批中')
      return true
    } else {
      toast.error(data.error || '登录失败')
    }
  } catch (e) {
    toast.error('登录失败')
  }
  return false
}