/*
 * HTTPAllClientFX.java
 * Copyright (c) 2020-12-21
 * author : Charzous
 * All right reserved.
 */

package chapter08;

import javafx.application.Application;
import javafx.application.Platform;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextArea;
import javafx.scene.control.TextField;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Priority;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;


public class HTTPAllClientFX extends Application {

    private Button btnExit=new Button("退出");
    private Button btnSend = new Button("网页请求");

//    private TextField tfSend=new TextField();//输入信息区域

    private TextArea taDisplay=new TextArea();//显示区域
    private TextField ipAddress=new TextField();//填写ip地址
    private TextField tfport=new TextField();//填写端口
    private Button btConn=new Button("连接");
    private HTTPSClient httpsClient;
    private HTTPClient httpClient;
    private Thread readThread;

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) {
        BorderPane mainPane=new BorderPane();

        //连接服务器区域
        HBox hBox1=new HBox();
        hBox1.setSpacing(10);
        hBox1.setPadding(new Insets(10,20,10,20));
        hBox1.setAlignment(Pos.CENTER);
        hBox1.getChildren().addAll(new Label("网页地址："),ipAddress,new Label("端口："),tfport,btConn);
        mainPane.setTop(hBox1);

        VBox vBox=new VBox();
        vBox.setSpacing(10);

        vBox.setPadding(new Insets(10,20,10,20));
        vBox.getChildren().addAll(new Label("网页信息显示区"),taDisplay);

        VBox.setVgrow(taDisplay, Priority.ALWAYS);
        mainPane.setCenter(vBox);


        HBox hBox=new HBox();
        hBox.setSpacing(10);
        hBox.setPadding(new Insets(10,20,10,20));
        hBox.setAlignment(Pos.CENTER_RIGHT);
        hBox.getChildren().addAll(btnSend,btnExit);
        mainPane.setBottom(hBox);

        Scene scene =new Scene(mainPane,700,500);
        primaryStage.setScene(scene);
        primaryStage.show();



        //连接按钮
        btConn.setOnAction(event -> {
            String ip=ipAddress.getText().trim();
            String port=tfport.getText().trim();
            taDisplay.clear();

            try {
                if (port.equals("443")){
                    httpsClient = new HTTPSClient(ip, port);
                    //成功连接服务器，接受服务器发来的第一条欢迎信息
                    taDisplay.appendText("服务器连接成功。\n");

                    readThread = new Thread(()->{
                        String receiveMsg=null;//从服务器接收一串字符
                        if (port.equals("443")){
                            while ((receiveMsg=httpsClient.receive())!=null){
                                //lambda表达式不能直接访问外部非final类型局部变量，需要定义一个临时变量
                                //若将receiveMsg定义为类成员变量，则无需临时变量
                                String msgTemp = receiveMsg;
                                Platform.runLater(()->{
                                    taDisplay.appendText(msgTemp+"\n");
                                });
                            }
                        }
                    });
                    readThread.start();
                }

                else if (port.equals("80")){
                    httpClient = new HTTPClient(ip, port);
                    taDisplay.appendText("服务器连接成功。\n");
                    readThread = new Thread(()-> {
                        String receiveMsg = null;
                        while ((receiveMsg = httpClient.receive()) != null) {
                            String msgTemp = receiveMsg;
                            Platform.runLater(() -> {
                                taDisplay.appendText(msgTemp + "\n");
                            });
                        }
                    });
                    readThread.start();
                }


            }catch (Exception e){
                taDisplay.appendText("服务器连接失败！"+e.getMessage()+"\n");
            }
        });

        //网页请求按钮事件
        btnSend.setOnAction(event -> {
            String ip=ipAddress.getText().trim();
            String port=tfport.getText().trim();
            String domainName=ipAddress.getText().trim();
            try {
                StringBuffer msg = new StringBuffer();
                msg.append("GET / HTTP/1.1\r\n"+
                                "HOST: "+domainName+"\r\n"+
                                "Accept: */*\r\n"+
                                "Accept-Language: zh-CN\r\n"+
                                "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64)\r\n"+
                                "Connection: Keep-Alive\r\n"
                        );
                if (port.equals("443"))
                    httpsClient.send(msg.toString());
                else if (port.equals("80"))
                    httpClient.send(msg.toString());

            } catch (InterruptedException e) {
                e.printStackTrace();
            }


        });


        btnExit.setOnAction(event -> {
            try {
                exit();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        });
        //窗体关闭响应的事件,点击右上角的×关闭,客户端也关闭
        primaryStage.setOnCloseRequest(event -> {
            try {
                exit();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        });
    }

    private void exit() throws InterruptedException {
        if (httpsClient!=null||httpClient!=null){
            readThread.sleep(1000);//多线程等待，关闭窗口时还有线程等待IO，设置1s间隔保证所有线程已关闭
            httpsClient.close();
            httpClient.close();
        }
        System.exit(0);
    }

}