import ipaddress
import json
import socket
import threading
from time import sleep

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


# 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 sender_net():
    def __init__(self, port=8424, client_host='127.0.0.1', client_port=8424):
        self.client_host = client_host
        self.client_port = client_port
        self.letter = Letter()
        self.port = port
        self.server = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
        # 设置socket选项以允许IPv4映射到IPv6
        self.server.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 0)
        self.server.bind(('::', 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, msg):
        conn.sendall(msg)

    def send_file(self, conn):
        self.letter: Letter = senders.sender.main()
        letter = self.letter.to_dict()
        msg = {"flag": 1, "data": letter}
        print(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 run(self):
        a = threading.Thread(target=self.main)
        a.start()
        a.join()

    def main(self):
        while True:
            try:
                client = socket.create_connection(
                    (self.client_host, self.client_port))  # 定义协议类型,相当于生命socket类型,同时生成socket连接对象
                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 as e:
                print(e)
                print("[*] Waiting for ...")
        # 加入线程
        a = threading.Thread(target=self.recver_thread, )
        b = threading.Thread(target=self.send_thread, args=(client,))
        a.start()
        b.start()
        a.join()
        b.join()


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): ")
        # 检查输入是否包含冒号
        if ':' in addr:
            try:
                # 分割地址和端口
                client_host, client_port = addr.rsplit(':', 1)
                # 验证端口是否为数字
                if client_port.isdigit():
                    client_port = int(client_port)
                    # 检查端口范围
                    if 0 <= client_port <= 65535:
                        # 尝试解析IP地址
                        try:
                            # 使用ipaddress模块来检查地址的有效性
                            ipaddress.ip_address(client_host)
                            break  # 输入有效，跳出循环
                        except ValueError:
                            print("Invalid IP address format.")
                    else:
                        print("Port must be between 0 and 65535.")
                else:
                    print("Port number is not a valid integer.")
            except ValueError:
                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 = sender_net(port, client_host, client_port)
    a.run()