[Flutter] 플러터 - 가위바위보 만들기

import 'dart:convert';
import 'dart:math';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  int total = 0;
  int winCnt = 0;
  int drawCnt = 0;
  int loseCnt = 0;
  String imgPath_com = "assets/images/scissor.png";
  String imgPath_user = "assets/images/scissor.png";

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Builder(
        builder: (context) {
          return Scaffold(
            appBar: AppBar(
              title: Text("가위-바위-보"),
            ),
            body: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    Image.asset(
                      imgPath_user,
                      width: 100,
                      height: 100,
                    ),
                    SizedBox(
                      width: 10,
                    ),
                    Text(
                      'VS',
                      style:
                          TextStyle(fontSize: 36, fontWeight: FontWeight.bold),
                    ),
                    SizedBox(
                      width: 10,
                    ),
                    Image.asset(
                      imgPath_com,
                      width: 100,
                      height: 100,
                    ),
                  ],
                ),
                SizedBox(
                  height: 50,
                ),
                Container(
                  width: 400,
                  height: 200,
                  alignment: Alignment.center,
                  child: Text(
                    '${total}전 ${winCnt}승 ${drawCnt}무 ${loseCnt}패',
                    style: TextStyle(
                      fontWeight: FontWeight.bold,
                      fontSize: 40,
                      color: Colors.blueGrey,
                    ),
                  ),
                ),
                SizedBox(
                  height: 50,
                ),
                Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    ElevatedButton(
                      onPressed: () {
                        _playGame(context, 1);
                      },
                      child: Text('가위'),
                    ),
                    ElevatedButton(
                      onPressed: () {
                        _playGame(context, 2);
                      },
                      child: Text('바위'),
                    ),
                    ElevatedButton(
                      onPressed: () {
                        _playGame(context, 3);
                      },
                      child: Text('보'),
                    ),
                  ],
                )
              ],
            ),
          );
        },
      ),
    );
  }

  void _playGame(BuildContext context, int userChoice) {
    String result = '';
    int comChoice = Random().nextInt(3) + 1;
    print(comChoice);

    String img = '';
    if (comChoice == 1) {
      img = 'scissor';
    } else if (comChoice == 2) {
      img = 'rock';
    } else {
      img = 'paper';
    }

    String userImg = '';
    if (userChoice == 1) {
      userImg = 'scissor';
    } else if (userChoice == 2) {
      userImg = 'rock';
    } else {
      userImg = 'paper';
    }

    setState(() {
      imgPath_com = 'assets/images/${img}.png';
      imgPath_user = 'assets/images/${userImg}.png';
      total++;
      result = _decision(comChoice, userChoice);
    });

    _showAlertDialog(context, result);
    _sendData();
  }

  String _decision(int com, int user) {
    int result = user - com;
    String decision = '';
    if (result == 1 || result == -2) {
      decision = 'Win';
      winCnt++;
    } else if (result == 0) {
      decision = 'Draw';
      drawCnt++;
    } else {
      decision = 'Lose';
      loseCnt++;
    }

    return decision;
  }

  void _showAlertDialog(BuildContext context, String result) {
    showDialog(
      context: context,
      builder: (context) {
        return AlertDialog(
          title: Text('승부는 ?'),
          content: Text('You ${result}'),
          actions: [
            TextButton(
              onPressed: () {
                Navigator.of(context).pop();
              },
              child: Text('close'),
            )
          ],
        );
      },
    );
  }

  Future<void> _sendData() async {
    String url = 'http://192.168.0.233:9003/api/post';
    final data = {
      'total': total,
      'win': winCnt,
      'draw': drawCnt,
      'lose': loseCnt
    };

    //post 요청 보내기
    final response = await http.post(
      Uri.parse(url),
      body: jsonEncode(data),
      headers: {'Content-Type': 'application/json'},
    );

    //응답 처리
    if (response.statusCode == 200) {
      print('Ok.... good : ' + response.body);
    } else {
      print('데이터 전송 실패 : ${response.statusCode}');
    }
  }
}