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from flask import Flask, request, render_template, redirect, url_for
from simple_salesforce import Salesforce
from dotenv import load_dotenv
import os

# Load environment variables
load_dotenv()

# Initialize Flask app
app = Flask(__name__)

# Salesforce connection
try:
    sf = Salesforce(
        username=os.getenv("SF_USERNAME"),
        password=os.getenv("SF_PASSWORD"),
        security_token=os.getenv("SF_SECURITY_TOKEN"),
        domain="login"  # Use "test" for sandbox
    )
    print("Salesforce connection successful!")
except Exception as e:
    print(f"Salesforce connection failed: {e}")
    sf = None

@app.route('/')
def login():
    return render_template('login.html')


@app.route('/auth', methods=['POST'])
def auth():
    email = request.form['email']
    password = request.form['password']

    if not sf:
        return "Salesforce connection failed. Please check credentials and try again."

    try:
        # Query Salesforce for user authentication
        query = f"SELECT Id, Reward_Points__c FROM Customer_Login__c WHERE Email__c = '{email}' AND Password__c = '{password}'"
        result = sf.query(query)

        if result['totalSize'] == 0:
            return "Invalid Login Details"

        customer = result['records'][0]
        reward_points = customer['Reward_Points__c']

        # Redirect to rewards page
        return redirect(url_for('rewards', customer_id=customer['Id'], points=reward_points))
    except Exception as e:
        return f"Error during authentication: {e}"


@app.route('/rewards/<customer_id>')
def rewards(customer_id):
    try:
        customer = sf.Customer_Login__c.get(customer_id)
        points = customer['Reward_Points__c']
        return render_template('rewards.html', points=points, customer_id=customer_id)
    except Exception as e:
        return f"Error fetching rewards: {e}"


@app.route('/apply_rewards', methods=['POST'])
def apply_rewards():
    customer_id = request.form['customer_id']
    bill_amount = float(request.form['bill_amount'])
    apply_rewards = request.form.get('apply_rewards')

    try:
        customer = sf.Customer_Login__c.get(customer_id)
        points = customer['Reward_Points__c']
        gst = 0.18 * bill_amount

        if points >= 500 and apply_rewards:
            discount = 0.1 * bill_amount
            final_bill = bill_amount - discount + gst
            updated_points = points - 500

            # Update the customer's reward points in Salesforce
            sf.Customer_Login__c.update(customer_id, {'Reward_Points__c': updated_points})
            message = "You saved 10% on your total bill!"
        else:
            discount = 0
            earned_points = 0.1 * bill_amount
            final_bill = bill_amount + gst
            updated_points = points + earned_points

            # Update the customer's reward points in Salesforce
            sf.Customer_Login__c.update(customer_id, {'Reward_Points__c': updated_points})
            message = f"You earned {earned_points:.2f} reward points!"

        # Render the summary page
        return render_template(
            'apply_rewards.html',
            original_bill=bill_amount,
            discount=discount,
            gst=gst,
            final_bill=final_bill,
            updated_points=updated_points,
            message=message
        )
    except Exception as e:
        return f"Error applying rewards: {e}"


if __name__ == '__main__':
    from waitress import serve
    serve(app, host="0.0.0.0", port=8080)