import type { APIRoute } from 'astro'
import { getOAuthClient } from '../../../lib/context'
import { getSession } from '../../../lib/session'

export const GET: APIRoute = async (context) => {
  try {
    const oauthClient = getOAuthClient(context.cookies)
    const url = new URL(context.request.url)
    const params = new URLSearchParams(url.search)

    const session = getSession(context.cookies)

    if (session.did) {
      try {
        const oauthSession = await oauthClient.restore(session.did)
        if (oauthSession) await oauthSession.signOut()
      } catch (err) {
        console.warn('OAuth restore failed during callback:', err)
      }
    }

    const oauth = await oauthClient.callback(params)
    session.did = oauth.session.did
    await session.save()

    return context.redirect('/')
  } catch (err) {
    console.error('OAuth callback failed:', err)
    return context.redirect('/?error=login_failed')
  }
}