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

import select

from entity.Letter import Letter, json_to_obj
import recv
from sender import sender


# 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_net():
    def __init__(self, port, client_host, client_port):
        self.client_host = client_host
        self.client_port = client_port
        self.letter = Letter()
        self.port = port
        self.server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.server.bind(('0.0.0.0', self.port))
        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("[+] haved received data:" + msg["data"])
            elif int(msg['flag']) == 1:
                self.recv_file(msg['data'])
            else:
                print("[x] Error")

    def send_thread(self, conn):
        while True:
            try:
                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:
                    print("[+] Calling file transfer module...")
                    # file_name = input("Enter file name to send: ")
                    self.send_file(conn)
                else:
                    print("[x] Error,plesae enter 0 to send data, or 1 to send file.")
            except ValueError:
                print("[x] Error, please enter a valid number.")

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

    def send_file(self, conn):
        self.letter: Letter = sender.main()
        letter = self.letter.to_dict()
        msg = {"flag": 1, "data": letter}
        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 recv_file(self, data):
        letter: Letter = json_to_obj(data)
        recv.handleLetter(letter)

    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((self.client_host, self.client_port))
                print("[*] Connected...")
                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 ...")
        # 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 input_verify():
    while True:
        try:
            port = int(input("[*] Enter to the listen port: "))
            break
        except ValueError:
            print("[x] Error, please enter a valid port number.")

    while True:
        addr = input("[*] Enter the address to connect to(127.0.0.1:8424): ")
        if ':' in addr:
            client_host, client_port = addr.split(":")
            if client_host and client_port.isdigit():
                client_port = int(client_port)
                if 0 <= client_port <= 65535:  # 检查端口范围
                    break  # 输入有效，跳出循环
                else:
                    print("Port must be between 0 and 65535.")
            else:
                print("Invalid address format. Please enter in the format 'host:port'.")
        else:
            print("Invalid address format. Please enter in the format 'host:port'.")
    return port, client_host, client_port


# test
if __name__ == '__main__':
    port, client_host, client_port = input_verify()
    a = recver_net(port, client_host, client_port)
    a.run()