app/lib/screens/cart.dart

import 'package:intl/intl.dart';
import 'package:flutter/material.dart';

import 'package:nekoya_flutter/api/api.dart';
import 'package:nekoya_flutter/components/cart_box.dart';
import 'package:nekoya_flutter/data/cart.dart';
import 'package:nekoya_flutter/screens/checkout.dart';

class Cart extends StatefulWidget {
  const Cart({Key? key}) : super(key: key);

  @override
  State<Cart> createState() => _CartState();
}

class _CartState extends State<Cart> {
  Future<dynamic> _viewCart = viewCart();

  @override
  Widget build(BuildContext context) {

    Future<dynamic> getTotal() async {
      dynamic totalPrice = 0;
      var orderData = await viewCart();
      await orderData.forEach((x) async {
        var product = await getProduct(x['product_id']);
        totalPrice += product[0]['PRICE'] * x['quantity'];
      });

      return Future.delayed(const Duration(seconds: 5), () {
        return totalPrice;
      });
    }

    return Scaffold(
      backgroundColor: const Color(0xff1b1c1e),
      appBar: AppBar(
        title: const Text('Cart'),
        centerTitle: true,
        backgroundColor: const Color(0xff212226),
      ),
      body: Container(
        margin: const EdgeInsets.only(bottom: 80.0),
        child: FutureBuilder<dynamic>(
          future: _viewCart,
          builder: (context, snapshot) {
            if (snapshot.hasData) {
              var data = snapshot.data;
              return ListView.builder(
                itemCount: data!.length,
                itemBuilder: (context, index) {
                  return FutureBuilder<dynamic>(
                    future: getProduct(data[index]["product_id"]),
                    builder: (context, snapshotx) {
                      if (snapshotx.hasData) {
                        var productData = snapshotx.data;
                        if (productData != null) {
                          return CartBox(
                            controller: true,
                            imageUrl: 'https://nekoya.moe.team/img/' + productData[0]['IMAGE'],
                            title: productData[0]['TITLE'],
                            quantity: data[index]["quantity"],
                            plus: () {
                              addToCart(data[index]["product_id"]);
                              setState(() {
                                _viewCart = viewCart();
                              });
                            },
                            minus: () {
                              removeFromCart(data[index]["product_id"], false);
                              setState(() {
                                _viewCart = viewCart();
                              });
                            },
                            remove: () {
                              removeFromCart(data[index]["product_id"], true);
                              setState(() {
                                _viewCart = viewCart();
                              });
                            }
                          );
                        }
                      }

                      return CartBox(
                        controller: true,
                        imageUrl: 'https://i.ibb.co/QJFLZC4/La-Darknesss-Portrait.webp',
                        title: 'Loading...',
                        quantity: 0,
                        plus: () {},
                        minus: () {},
                        remove: () {},
                      );
                    }
                  );
                },
              );
            }

            return const Center(
              child: CircularProgressIndicator(
                color: Color(0xff8B0000),
              ),
            );
          }
        ),
      ),
      floatingActionButton: Padding(
        padding: const EdgeInsets.only(bottom: 100.0),
        child: FloatingActionButton.extended(
          onPressed: (){
            Navigator.of(context).push(MaterialPageRoute(
              builder: (context) => const Checkout())
            );
          },
          icon: const Icon(Icons.shopping_cart_checkout),
          label: Row(
            children: [
              FutureBuilder<dynamic>(
                future: getTotal(),
                builder: (context, snapshot) {
                  if (snapshot.hasData) {
                    var price = snapshot.data;
                    return Text("Rp ${NumberFormat('#,##0.00', 'ID').format(price)}");
                  }

                  return const Text("Rp -");
                }
              ),
              const SizedBox(width: 90,),
              const Text("Checkout")
            ],
          )
        ),
      ),
      floatingActionButtonLocation: FloatingActionButtonLocation.centerFloat,
    );
  }
}