import 'dart:convert'; // Importing the dart:convert library for JSON encoding and decoding
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;

// Flutter script to initialize a PayPal payment in a sandbox environment

class YourScreen extends StatelessWidget {
  // URL for PayPal payment initialization
  final String url =
      "https://100088.pythonanywhere.com/api/paypal/initialize/public/c2636d98-4f43-4be1-9e3b-47cdfcbe832b";

  // Payload containing necessary data for PayPal initialization
  final Map<String, dynamic> payload = {
    "paypal_client_id":
        "AV8dKWCeHxLqYwwtA_a-j3jzwp7cicx_n-pr8TVT4Paur3wi1BqZYjZs8E02byboQpZlToSY5xsYqzfe",
    "paypal_secret_key":
        "ECBMK_NZwuKJIMyBe6rAU4YT53fFQqPk-wX6FuOdNchgzeWNuuHWUyq7jj6FzeMl_ZnYxtAXm1sYDDy1",
    "price": 500,
    "product": "ec",
    "currency_code": "usd",
    "callback_url": "https://www.google.com",
    "mode": "sandbox",
  };

  @override
  Widget build(BuildContext context) {
    // Widget to asynchronously fetch data
    return FutureBuilder(
      future: fetchData(),
      builder: (context, snapshot) {
        if (snapshot.connectionState == ConnectionState.waiting) {
          // Displaying a loading indicator while waiting for data
          return CircularProgressIndicator();
        } else if (snapshot.hasError) {
          // Displaying an error message if there's an error
          return Text('Error: ${snapshot.error}');
        } else {
          // Printing success message and returning fetched data
          print("Resource created successfully");
          print(snapshot.data);
          return Text('Data: ${snapshot.data}');
        }
      },
    );
  }

  // Function to fetch data asynchronously
  Future fetchData() async {
    try {
      final response = await http.post(
        Uri.parse(url),
        headers: {'Content-Type': 'application/json'},
        body: jsonEncode(payload),
      );

      if (response.statusCode == 201) {
        // Returning decoded JSON data if the request is successful
        return jsonDecode(response.body);
      } else {
        // Throwing an exception if the request fails
        throw Exception(
            'Request failed with status code: ${response.statusCode}');
      }
    } catch (error) {
      // Throwing an exception if there's an error during the request
      throw Exception('Request failed with an exception: $error');
    }
  }
}