import socket
import threading

HOST = ''
PORT = 2002
MAX_CONNECTIONS = 3
MAX_DINERO = 120000
connections = 0
max_connections_reached = False
dinero_lock = threading.Lock()  

def handle_client(client_socket, addr):
    global connections
    global MAX_DINERO
    if connections >= MAX_CONNECTIONS:
        response = "Maximo numero de conexiones alcanzado. Por favor intente mas tarde."
        client_socket.sendall(response.encode('utf-8'))
        client_socket.close()
        return
    print(f"cliente conectado {addr})")
    connections += 1
    print(f"Conexiones activas: {connections}")
    try:
        while True:
            try:
                datos = client_socket.recv(1024)
            except ConnectionResetError:
                print("Connection was closed by the client.")
                break
            if not datos:
                print("No data received from client. Closing connection.")
                break
            decoded_data = datos.decode('utf-8')
            if decoded_data.lower() == 'conectando!':
                response = "Connection successful!"
                client_socket.sendall(response.encode('utf-8'))
            elif ' ' in decoded_data:
                command, amount = decoded_data.split()
                amount = int(amount)
                if command.lower() == 'retirar':
                    with dinero_lock:
                        if amount <= MAX_DINERO:
                            MAX_DINERO -= amount
                            response = f"Retiro Existoso."
                            print("Retiro Existoso.")
                            print(f"Saldo restante: {MAX_DINERO}")
                        else:
                            response = "Saldo insuficiente por favor intente mas tarde."
                            print("Saldo insuficiente para operacion.")
                    client_socket.sendall(response.encode('utf-8'))
                elif command.lower() == 'exit':
                    break
            else:
                print(f"Received unexpected data: {decoded_data}")
    except socket.timeout:
        print("Client did not send data within the timeout period.")
    finally:
        connections -= 1
        print(f"Conexiones activas: {connections}")
        client_socket.close()

while True:
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
        server_address = (HOST, PORT)
        s.bind(server_address)
        s.listen(MAX_CONNECTIONS)
        while True:
            if connections < MAX_CONNECTIONS:
                client_socket, addr = s.accept()
                client_thread = threading.Thread(target=handle_client, args=(client_socket, addr))
                client_thread.start()