import tkinter
import tkinter.font as tkFont
import socket
import threading
import time
import sys
class ServerUI():
    local="127.0.0.1"
    port=5505
    global serverSock
    flag=False

    #初始化类的相关属性的构造函数
    def __init__(self):
        self.root=tkinter.Tk()
        self.root.title("Py聊天服务端")
        #窗口面板，用四个frame面板布局
        self.frame=[tkinter.Frame(),tkinter.Frame(),tkinter.Frame(),tkinter.Frame()]
        #显示消息Text右边的滚动条
        self.chatTextScrollBar=tkinter.Scrollbar(self.frame[0])
        self.chatTextScrollBar.pack(side=tkinter.RIGHT,fill=tkinter.Y)
        #显示消息Text，并绑定上面的滚动条
        ft=tkFont.Font(family='Fixdsys',size=11)
        self.chatText=tkinter.Listbox(self.frame[0],width=70,height=18,font=ft)
        self.chatText['yscrollcommand']=self.chatTextScrollBar.set
        self.chatText.pack(expand=1,fill=tkinter.BOTH)
        self.chatTextScrollBar['command']=self.chatText.yview()
        self.frame[0].pack(expand=1,fill=tkinter.BOTH)
        #标签，分开消息显示Text和消息输入Text
        label=tkinter.Label(self.frame[1],height=2)
        label.pack(fill=tkinter.BOTH)
        self.frame[1].pack(expand=1,fill=tkinter.BOTH)
        #输入消息Text的滚动条
        self.inputTextScrollBar=tkinter.Scrollbar(self.frame[2])
        self.inputTextScrollBar.pack(side=tkinter.RIGHT,fill=tkinter.Y)
        #输入消息Text，并于滚动条绑定
        ft=tkFont.Font(family='Fixdsys',size=11)
        self.inputText=tkinter.Text(self.frame[2],width=70,height=8,font=ft)
        self.inputText['yscrollcommand']=self.inputTextScrollBar.set
        self.inputText.pack(expand=1,fill=tkinter.BOTH)
        self.inputTextScrollBar['command']=self.chatText.yview()
        self.frame[2].pack(expand=1,fill=tkinter.BOTH)
        #发送消息按钮
        self.sendButton=tkinter.Button(self.frame[3],text="发送",width=10,command=self.sendMessage)
        self.sendButton.pack(expand=1,side=tkinter.BOTTOM and tkinter.RIGHT,padx=25,pady=5)
        self.inputText.delete(1.0,"end")
        #关闭按钮
        self.closeButton=tkinter.Button(self.frame[3],text='关闭',width=10,command=self.close)
        self.closeButton.pack(expand=1,side=tkinter.RIGHT,padx=25,pady=5)
        self.frame[3].pack(expand=1,fill=tkinter.BOTH)

    #接收消息
    def receiveMessage(self):
        self.serverSock=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
        self.serverSock.bind((self.local,self.port))
        self.serverSock.listen(15)
        self.buffer=1024
        self.chatText.insert(tkinter.END,'服务器已经准备就绪......')
        #循环接收客户端请求
        while True:
            self.connection,self.address=self.serverSock.accept()
            self.flag=True
            while True:
                self.cientMsg=self.connection.recv(self.buffer).decode("utf-8")
                if not self.cientMsg:
                    continue
                elif self.cientMsg=='Y':
                    self.chatText.insert(tkinter.END,'服务器已经与客户端建立连接...')
                    self.connection.send(b'Y')
                elif self.cientMsg=='N':
                    self.chatText.insert(tkinter.END,'服务器与客户端建立连接失败...')
                    self.connection.send(b'N')
                else:
                    theTime=time.strftime("%Y-%m-%d %H:%M:%S",time.localtime())
                    self.chatText.insert(tkinter.END,'客户端'+theTime+"说：\n")
                    self.chatText.insert(tkinter.END,''+self.cientMsg)

    def sendMessage(self):
        message=self.inputText.get('1.0',tkinter.END)
        theTime=time.strftime("%Y-%m-%d %H:%M:%S",time.localtime())
        self.chatText.insert(tkinter.END,'服务器'+theTime+"说\n")
        self.chatText.insert(tkinter.END,''+message+'\n')
        if self.flag==True:
            self.connection.send(message.encode())
        else:
            self.chatText.insert(tkinter.END,"你还没有与客户建立连接，客户端无法收到消息")
        self.inputText.delete(0.0,message.__len__()-1.0)

    def close(self):
        sys.exit()
    def startNewThread(self):
        thread=threading.Thread(target=self.receiveMessage,args=())
        thread.setDaemon(True)
        thread.start()

def main():
    server=ServerUI()
    server.startNewThread()
    server.root.mainloop()

if __name__=='__main__':
    main()