Add Google Sign-In to Your App

"use client"

import { useState } from 'react'

export default function LoginPage() {
  const [isLoading, setIsLoading] = useState(false)

  const handleGoogleSignIn = async () => {
    setIsLoading(true)

    // Call OAuth42's social auth init endpoint
    const response = await fetch('/api/auth/social/google', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        provider: 'google',
        client_id: process.env.NEXT_PUBLIC_OAUTH42_CLIENT_ID,
        is_signup: false,
      }),
    })

    const data = await response.json()

    if (data.authorization_url) {
      // Redirect to Google
      window.location.href = data.authorization_url
    }
  }

  return (
    <div className="min-h-screen flex items-center justify-center bg-gray-100">
      <div className="max-w-md w-full space-y-6 p-8 bg-white rounded-lg shadow">
        <h1 className="text-2xl font-bold text-center">Sign In</h1>

        <button
          onClick={handleGoogleSignIn}
          disabled={isLoading}
          className="w-full flex items-center justify-center gap-3 py-3 px-4 border border-gray-300 rounded-lg hover:bg-gray-50 transition-colors"
        >
          <svg className="w-5 h-5" viewBox="0 0 24 24">
            <path fill="#4285F4" d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92c-.26 1.37-1.04 2.53-2.21 3.31v2.77h3.57c2.08-1.92 3.28-4.74 3.28-8.09z"/>
            <path fill="#34A853" d="M12 23c2.97 0 5.46-.98 7.28-2.66l-3.57-2.77c-.98.66-2.23 1.06-3.71 1.06-2.86 0-5.29-1.93-6.16-4.53H2.18v2.84C3.99 20.53 7.7 23 12 23z"/>
            <path fill="#FBBC05" d="M5.84 14.09c-.22-.66-.35-1.36-.35-2.09s.13-1.43.35-2.09V7.07H2.18C1.43 8.55 1 10.22 1 12s.43 3.45 1.18 4.93l2.85-2.22.81-.62z"/>
            <path fill="#EA4335" d="M12 5.38c1.62 0 3.06.56 4.21 1.64l3.15-3.15C17.45 2.09 14.97 1 12 1 7.7 1 3.99 3.47 2.18 7.07l3.66 2.84c.87-2.6 3.3-4.53 6.16-4.53z"/>
          </svg>
          {isLoading ? 'Redirecting...' : 'Continue with Google'}
        </button>

        <div className="relative">
          <div className="absolute inset-0 flex items-center">
            <div className="w-full border-t border-gray-300" />
          </div>
          <div className="relative flex justify-center text-sm">
            <span className="px-2 bg-white text-gray-500">or</span>
          </div>
        </div>

        {/* Your regular email/password login form */}
        <form className="space-y-4">
          <input
            type="email"
            placeholder="Email"
            className="w-full px-4 py-3 border border-gray-300 rounded-lg"
          />
          <input
            type="password"
            placeholder="Password"
            className="w-full px-4 py-3 border border-gray-300 rounded-lg"
          />
          <button
            type="submit"
            className="w-full py-3 px-4 bg-indigo-600 text-white rounded-lg hover:bg-indigo-700"
          >
            Sign In
          </button>
        </form>
      </div>
    </div>
  )
}

mkdir -p app/api/auth/social/google
touch app/api/auth/social/google/route.ts

import { NextRequest, NextResponse } from 'next/server'

const API_BASE_URL = process.env.OAUTH42_ISSUER || 'https://api.oauth42.com'

export async function POST(request: NextRequest) {
  try {
    const body = await request.json()

    const response = await fetch(`${API_BASE_URL}/api/social-auth/init`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        provider: 'google',
        client_id: body.client_id,
        is_signup: body.is_signup || false,
        state: body.state,
      }),
    })

    const data = await response.json()

    if (!response.ok) {
      return NextResponse.json(data, { status: response.status })
    }

    return NextResponse.json(data)
  } catch (error) {
    console.error('[Social Auth] Error:', error)
    return NextResponse.json(
      { error: 'Failed to initiate social auth' },
      { status: 500 }
    )
  }
}