import hashlib
import json
import selectors
import socket
import threading
from time import sleep

import select


# from entity.Letter import Letter


# def main():
#     # 用户输入各种数据填充letter字段
#     # 获取用户的公私钥对进行签名
#     # 使用对方的公钥进行加密
#     # 发送信件
#     pass
#
#
# def sendLetter(letter: Letter, target="192.168.195.162:8426"):
#     # 向目标ip和端口发送指定的信件
#     pass

class recver():
    def __init__(self):
        self.file_name = ""
        self.flle_size = 0
        self.file_sha256 = ""
        self.addr = ("", 0)
        self.server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.server.bind(('127.0.0.1', 8425))
        self.server.listen(10)

    def recver_thread(self):
        while True:
            conn, addr = self.server.accept()
            data = conn.recv(10240)
            msg = json.loads(data.decode())
            if int(msg['flag']) == 0:
                print("\nhaved received data:"+msg["data"]+"\n")
            elif int(msg['flag']) == 1:
                self.recv_file(msg['data'])
            else:
                print("Error")

    def send_thread(self, conn):
        while True:
            flag: int = int(input(""))
            if flag == 0:
                data = input("Enter data to send: ")
                msg = {"flag": 0, "data": data}
                msg = json.dumps(msg).encode("utf-8")
                self.send_data(conn, msg)
            elif flag == 1:
                file_name = input("Enter file name to send: ")
                self.send_file(conn, file_name)
            else:
                print("Error,plesae enter 0 to send data, or 1 to send file.")


    def send_data(self, conn, data):
        conn.sendall(data)

    def send_file(self, conn, file_name):
        data = "dawwaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
        msg = {"flag": 1, "data": data}
        msg = json.dumps(msg).encode("utf-8")
        conn.sendall(msg)

    def recv_data(self, conn):
        con, addr = conn.accept()
        data = con.recv(1024)
        if not data:
            return None
        # print(data.decode())
        return data.decode()
    def main(self):

        while True:
            try:
                client = socket.socket()  # 定义协议类型,相当于生命socket类型,同时生成socket连接对象
                client.connect(('127.0.0.1', 8424))
                print("Connected to recver.")
                print("if you want to send data, enter 0, if you want to send file, enter 1.")
                sleep(1)
                break
            except socket.error:
                print("Waiting for recver...")
        # 加入线程
        threading.Thread(target=self.recver_thread, ).start()
        threading.Thread(target=self.send_thread, args=(client,)).start()

    def run(self):
        threading.Thread(target=self.main).start()

    def recv_file(self, data):
        with open("3.txt", 'wb') as file:
            print("Receiving file data...")
            file.write(data)  # 写入数据到文件
            print("File received successfully.")


# test
if __name__ == '__main__':
    a = recver()
    a.run()