from socket import AF_INET, socket, SOCK_STREAM
from threading import Thread

clients = {}
addresses = {}

# Define constants
HOST = ''
PORT = 5000
BUFSIZE = 1024
ADDR = (HOST, PORT)
SERVER = socket(AF_INET, SOCK_STREAM)
SERVER.bind(ADDR)

# Setup accepting connections
def accept_incoming_connections():
    while True:
        client, client_address = SERVER.accept()
        print('%s:%s has connected.' %client_address)
        client.send(bytes('Greetings from the bizothood!' + 'Now please type the username you want and press enter', "utf8"))
        addresses[client] = client_address
        Thread(target=handle_client, args=(client,)).start()

def handle_client(client):
    name = client.recv(BUFSIZE).decode('utf8')
    welcome = 'Welcome %s! If you ever want to quit chatting, type {quit} to exit.' %name
    client.send(bytes(welcome, "utf8"))
    msg = '%s has joined the chat' %name
    broadcast(bytes(msg, "utf8"))
    clients[client] = name
    while True:
        msg = client.recv(BUFSIZE)
        if msg != bytes("{quit}", "utf8"):
            broadcast(msg, name+": ")
        else:
            client.send(bytes("{quit}", "utf8"))
            client.close()
            del clients[client]
            broadcast(bytes("%s has left the chat." %name, "utf8"))
            break

def broadcast(msg, prefix=""):
    for sock in clients:
        sock.send(bytes(prefix, "utf8")+msg)


if __name__ == "__main__":
    SERVER.listen(5) # Listens for 5 connections at max
    print("Waiting for connection....")
    ACCEPT_THREAD = Thread(target=accept_incoming_connections)
    ACCEPT_THREAD.start()
    ACCEPT_THREAD.join()
    SERVER.close()
