Teso_Mobile/lib/Pages/Sub_Pages/Coupons/Acquire.dart

import 'package:flutter/material.dart';
import 'package:teso/Classes/API Clasess/CouponHead.dart';
import 'package:provider/provider.dart';
import 'package:teso/Classes/CouponRateCalculator.dart';
import 'package:teso/providers/device_provider.dart';
import 'package:teso/util/consts.dart';

class AcquireCoupon extends StatefulWidget {
  final CouponsHead head;
  final double price;

  const AcquireCoupon({Key key, this.head, this.price}) : super(key: key);
  @override
  _AcquireCouponState createState() => _AcquireCouponState(head: this.head);
}

class _AcquireCouponState extends State<AcquireCoupon> {
  final CouponsHead head;
  _AcquireCouponState({this.head});
  double _value;
  int _n = 1;
  int coinCost = 0;

  changeValue(val) {
    setState(() {
      _value = val;
    });
    calcCost();
  }

  calcCost() {
    double price = widget.price * (_value / 100);

    coinCost = CouponRateCalculator.getRate(price);

    coinCost = coinCost * _n;
  }

  @override
  void initState() {
    _value = head.lower;
    calcCost();
    super.initState();
  }

  void add() {
    setState(() {
      _n++;
    });
    calcCost();
  }

  void minus() {
    setState(() {
      if (_n != 1) _n--;
    });
    calcCost();
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      margin: EdgeInsets.symmetric(
        horizontal: (MediaQuery.of(context).size.width) * 0.030,
        vertical: (MediaQuery.of(context).size.width) * 0.040,
      ),
      child: Material(
        child: new Wrap(children: <Widget>[
          new Container(
              width: double.infinity,
              margin: EdgeInsets.only(
                top: 20.0,
                bottom: 12.0,
              ),
              child: Center(
                child: Text(
                  "ACQUIRE COUPON",
                  style: TextStyle(
                    fontSize: 20.0,
                  ),
                ),
              )),
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 20.0),
            child: Divider(),
          ),
          new ListTile(
            title: new Container(
              child: new Center(
                child: new Row(
                  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                  children: <Widget>[
                    Text("Quantity"),
                    new Container(
                      width: 30,
                      height: 30,
                      child: new FloatingActionButton(
                        onPressed: minus,
                        child: Text(
                          "-",
                          style: TextStyle(
                            fontSize: 25,
                            color: Colors.black,
                          ),
                        ),
                        backgroundColor: Colors.white,
                      ),
                    ),
                    new Text('$_n', style: new TextStyle(fontSize: 20.0)),
                    new Container(
                      width: 30,
                      height: 30,
                      child: new FloatingActionButton(
                        onPressed: add,
                        child: new Icon(
                          Icons.add,
                          color: Colors.black,
                          size: 20,
                        ),
                        backgroundColor: Colors.white,
                      ),
                    ),
                  ],
                ),
              ),
            ),
          ),
          Container(
            child: head.type.toLowerCase().contains("freebie")
                ? Center(
                    child: Text("Coupon Type : FREEBIE"),
                  )
                : Row(
                    children: [
                      Text(head.lower.toString() + " %"),
                      Slider(
                        value: _value,
                        min: head.lower,
                        max: head.upper,
                        divisions: 20,
                        activeColor: accentMain,
                        inactiveColor: darkAccent,
                        label: _value.toString() + "%",
                        onChanged: (double newValue) => changeValue(newValue),
                      ),
                      Text(head.upper.toString() + " %"),
                    ],
                  ),
          ),
          Center(
            child: Wrap(
              direction: Axis.horizontal,
              children: [
                Container(
                  child: Container(
                    height: 40.0,
                    width: 40.0,
                    decoration: new BoxDecoration(
                      shape: BoxShape.circle,
                    ),
                    child: Container(
                      width: 40,
                      height: 40,
                      decoration: BoxDecoration(
                        shape: BoxShape.circle,
                      ),
                      child: ClipRRect(
                        borderRadius: BorderRadius.only(
                          topLeft: Radius.circular(50.0),
                          topRight: Radius.circular(50.0),
                          bottomLeft: Radius.circular(50),
                          bottomRight: Radius.circular(50),
                        ),
                        child: Image(
                          height: 40,
                          width: 40,
                          fit: BoxFit.fill,
                          image: AssetImage("assets/images/silver1.png"),
                        ),
                      ),
                    ),
                  ),
                ),
                Container(
                  width: 40,
                  height: 40,
                  child: Center(
                    child: Text(
                      coinCost.toString(),
                      style: TextStyle(
                        fontSize: 20,
                        fontWeight: FontWeight.bold,
                      ),
                    ),
                  ),
                ),
              ],
            ),
          ),
          new ListTile(
            title: new ElevatedButton(
              style: ElevatedButton.styleFrom(
                primary: accentMain,
                shape: RoundedRectangleBorder(
                  borderRadius: BorderRadius.all(
                    Radius.circular(20.0),
                  ),
                ),
              ),
              onPressed: coinCost == 0
                  ? null
                  : () async {
                      head.lower = _value;
                      head.quantity = _n;
                      await Provider.of<DeviceProvider>(context, listen: false)
                          .acceptCoupon(head, coinCost, context);
                    },
              child: Text("Confirm"),
            ),
            onTap: () => {},
          ),
        ]),
      ),
    );
  }
}