main.dart

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:memory/data/data.dart';
import 'package:memory/models/TileModel.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Home(),
    );
  }
}

class Home extends StatefulWidget {
  @override
  _HomeState createState() => _HomeState();
}

class _HomeState extends State<Home> {
  List<TileModel> gridViewTiles = [];
  List<TileModel> questionPairs = [];

  @override
  void initState() {
    super.initState();
    reStart();
  }

  void reStart() {
    myPairs = getPairs();
    myPairs.shuffle();

    gridViewTiles = myPairs;
    Future.delayed(const Duration(seconds: 3), () {
      setState(() {
        questionPairs = getQuestionPairs();
        gridViewTiles = questionPairs;
        selected = false;
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      body: SingleChildScrollView(
        child: Container(
          padding: EdgeInsets.symmetric(horizontal: 20, vertical: 50),
          child: Column(
            children: <Widget>[
              SizedBox(
                height: 40,
              ),
              points != 800
                  ? Column(
                      crossAxisAlignment: CrossAxisAlignment.center,
                      children: <Widget>[
                        Text(
                          "$points/800",
                          style: TextStyle(
                            fontSize: 20,
                            fontWeight: FontWeight.w500,
                          ),
                        ),
                        Text(
                          "Points",
                          textAlign: TextAlign.start,
                          style: TextStyle(
                            fontSize: 14,
                            fontWeight: FontWeight.w300,
                          ),
                        ),
                      ],
                    )
                  : Container(),
              SizedBox(
                height: 20,
              ),
              points != 800
                  ? GridView(
                      shrinkWrap: true,
                      //physics: ClampingScrollPhysics(),
                      scrollDirection: Axis.vertical,
                      gridDelegate: SliverGridDelegateWithMaxCrossAxisExtent(
                        mainAxisSpacing: 0.0,
                        maxCrossAxisExtent: 100.0,
                      ),
                      children: List.generate(gridViewTiles.length, (index) {
                        return Tile(
                          imagePathUrl: gridViewTiles[index].getImageAssetPath(),
                          tileIndex: index,
                          parent: this,
                        );
                      }),
                    )
                  : Container(
                      child: Column(
                        children: <Widget>[
                          GestureDetector(
                            onTap: () {
                              setState(() {
                                points = 0;
                                reStart();
                              });
                            },
                            child: Container(
                              height: 50,
                              width: 200,
                              alignment: Alignment.center,
                              decoration: BoxDecoration(
                                color: Colors.blue,
                                borderRadius: BorderRadius.circular(24),
                              ),
                              child: Text(
                                "Replay",
                                style: TextStyle(
                                  color: Colors.white,
                                  fontSize: 17,
                                  fontWeight: FontWeight.w500,
                                ),
                              ),
                            ),
                          ),
                        ],
                      ),
                    ),
            ],
          ),
        ),
      ),
    );
  }
}

class Tile extends StatefulWidget {
  final String imagePathUrl;
  final int tileIndex;
  final _HomeState? parent;

  Tile({this.imagePathUrl = '', this.tileIndex = 0, this.parent});

  @override
  _TileState createState() => _TileState();
}

class _TileState extends State<Tile> {
  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: () {
        if (!selected) {
          setState(() {
            myPairs[widget.tileIndex].setIsSelected(true);
          });
          if (selectedTile != "") {
            /// testing if the selected tiles are same
            if (selectedTile == myPairs[widget.tileIndex].getImageAssetPath()) {
              print("add point");
              points = points + 100;
              print(selectedTile + " -> " + widget.imagePathUrl);

              TileModel tileModel = new TileModel();
              print(widget.tileIndex);
              selected = true;
              Future.delayed(const Duration(seconds: 2), () {
                tileModel.setImageAssetPath("");
                myPairs[widget.tileIndex] = tileModel;
                print(selectedIndex);
                myPairs[selectedIndex] = tileModel;
                this.widget.parent?.setState(() {});
                setState(() {
                  selected = false;
                });
                selectedTile = "";
              });
            } else {
              print(selectedTile + " -> " + myPairs[widget.tileIndex].getImageAssetPath());
              print("wrong choice");
              print(widget.tileIndex);
              print(selectedIndex);
              selected = true;
              Future.delayed(const Duration(seconds: 2), () {
                this.widget.parent?.setState(() {
                  myPairs[widget.tileIndex].setIsSelected(false);
                  myPairs[selectedIndex].setIsSelected(false);
                });
                setState(() {
                  selected = false;
                });
              });

              selectedTile = "";
            }
          } else {
            setState(() {
              selectedTile = myPairs[widget.tileIndex].getImageAssetPath();
              selectedIndex = widget.tileIndex;
            });

            print(selectedTile);
            print(selectedIndex);
          }
        }
      },
      child: Container(
        margin: EdgeInsets.all(5),
        child: myPairs[widget.tileIndex].getImageAssetPath() != ""
            ? Image.asset(myPairs[widget.tileIndex].getIsSelected()
                ? myPairs[widget.tileIndex].getImageAssetPath()
                : widget.imagePathUrl)
            : Container(
                color: Colors.white,
                child: Image.asset("assets/correct.png"),
              ),
      ),
    );
  }
}