// This is a high-level full-stack implementation example for "Uber-Like Negotiable Service for Mobile Car Washing"
// It combines frontend (React), backend (Express.js), and integrations (Stripe, AWS SES, Google SSO)
// This is just one complex code sample focusing on negotiation flow with key business logic implemented.

// === BACKEND (Node.js with Express.js) ===
// server.js
const express = require('express');
const cors = require('cors');
const bodyParser = require('body-parser');
const { v4: uuidv4 } = require('uuid');
const stripe = require('stripe')(process.env.STRIPE_SECRET_KEY);
const AWS = require('aws-sdk');
const nodemailer = require('nodemailer');

AWS.config.update({ region: 'us-east-1' });
const ses = new AWS.SES();

const app = express();
app.use(cors());
app.use(bodyParser.json());

let offers = {}; // In-memory offer store
let users = {};
let businesses = {};

// === Google SSO Bot Prevention ===
app.post('/auth/google', (req, res) => {
  const { id_token } = req.body;
  // Validate token using Google Auth lib and filter spam based on domain/IP etc
  // If valid, store user in DB or memory
  res.send({ success: true });
});

// === Create Offer ===
app.post('/offer', (req, res) => {
  const { clientId, services, location } = req.body;
  const offerId = uuidv4();
  const offer = { offerId, clientId, services, location, status: 'negotiation', timestamp: Date.now() };
  offers[offerId] = offer;

  // Notify businesses by SES
  const params = {
    Destination: { ToAddresses: ['provider@example.com'] },
    Message: {
      Body: {
        Text: { Data: `New service offer posted: ${JSON.stringify(services)}` },
      },
      Subject: { Data: 'New Car Wash Offer Available!' },
    },
    Source: 'no-reply@yourdomain.com',
  };

  ses.sendEmail(params, (err, data) => {
    if (err) console.error(err);
  });

  res.send({ offerId });
});

// === Counter Offer ===
app.post('/counter-offer', (req, res) => {
  const { offerId, businessId, newPrice, addons } = req.body;
  if (!offers[offerId]) return res.status(404).send('Offer not found');

  offers[offerId].counterOffer = { businessId, newPrice, addons, timestamp: Date.now() };
  res.send({ success: true });
});

// === Accept Offer and Pre-authorize Payment ===
app.post('/accept-offer', async (req, res) => {
  const { offerId, paymentMethodId } = req.body;
  const offer = offers[offerId];
  if (!offer || !offer.counterOffer) return res.status(400).send('Invalid offer');

  const paymentIntent = await stripe.paymentIntents.create({
    amount: offer.counterOffer.newPrice * 100,
    currency: 'usd',
    payment_method: paymentMethodId,
    capture_method: 'manual',
    confirm: true,
  });

  offer.paymentIntentId = paymentIntent.id;
  offer.status = 'in_progress';

  res.send({ success: true, clientSecret: paymentIntent.client_secret });
});

// === Complete Service ===
app.post('/complete-service', async (req, res) => {
  const { offerId, beforeImages, afterImages, proof } = req.body;
  const offer = offers[offerId];
  if (!offer) return res.status(404).send('Offer not found');

  offer.status = 'completed';
  offer.proof = { beforeImages, afterImages, proof };

  // Email client job is done
  // Store to DB for review/profile etc.

  res.send({ success: true });
});

// === Daily Cron Job (Mock Function) ===
const dailyPayouts = () => {
  Object.values(offers).forEach(async (offer) => {
    if (offer.status === 'completed' && offer.paymentIntentId) {
      await stripe.paymentIntents.capture(offer.paymentIntentId);
      offer.status = 'paid';
      // Notify service provider by email
    }
  });
};

app.listen(3001, () => console.log('Backend running on port 3001'));


// === FRONTEND (React Component Example) ===
// components/CreateOffer.js
import React, { useState } from 'react';
import axios from 'axios';

const CreateOffer = () => {
  const [services, setServices] = useState('');
  const [location, setLocation] = useState('');

  const createOffer = async () => {
    const response = await axios.post('http://localhost:3001/offer', {
      clientId: '12345',
      services: services.split(','),
      location,
    });
    alert('Offer ID: ' + response.data.offerId);
  };

  return (
    <div className="p-4 max-w-xl mx-auto">
      <h2 className="text-xl font-bold mb-2">Create Service Offer</h2>
      <input className="border p-2 mb-2 w-full" placeholder="Services (comma-separated)" onChange={e => setServices(e.target.value)} />
      <input className="border p-2 mb-2 w-full" placeholder="Location" onChange={e => setLocation(e.target.value)} />
      <button className="bg-blue-500 text-white px-4 py-2 rounded" onClick={createOffer}>Submit Offer</button>
    </div>
  );
};

export default CreateOffer;


// NOTE: For production, use MongoDB/PostgreSQL for storing users/offers securely.
// Protect endpoints with authentication middleware.
// Use file uploads (like AWS S3) for media proof images.
// Set up Stripe Webhooks for real-time payment event tracking.
// Schedule daily cron jobs with node-cron or serverless functions.
// Implement chat and Google SSO with Firebase or similar.
// Add unit and integration tests.