#!/usr/bin/env python3
from utils.colors import colors, puts, sep
from utils.firegexapi import FiregexAPI
from multiprocessing import Process
from time import sleep
import iperf3
import csv
import argparse
import secrets

parser = argparse.ArgumentParser()
parser.add_argument("--address", "-a", type=str , required=False, help='Address of firegex backend', default="http://127.0.0.1:4444/")
parser.add_argument("--port", "-P", type=int , required=False, help='Port of the Benchmark service', default=1337)
parser.add_argument("--service-name", "-n", type=str , required=False, help='Name of the Benchmark service', default="Benchmark Service")
parser.add_argument("--password", "-p", type=str, required=True, help='Firegex password')
parser.add_argument("--num-of-regexes", "-r", type=int, required=True, help='Number of regexes to benchmark with')
parser.add_argument("--duration", "-d", type=int, required=False, help='Duration of the Benchmark in seconds', default=5)
parser.add_argument("--output-file", "-o", type=str, required=False, help='Output results csv file', default="benchmark.csv")
parser.add_argument("--num-of-streams", "-s", type=int, required=False, help='Number of concurrent streams', default=1)

args = parser.parse_args()
sep()
puts(f"Benchmarking with {args.num_of_regexes} regexes will start on ", color=colors.cyan, end="")
puts(f"{args.address}", color=colors.yellow)

firegex = FiregexAPI(args.address)

#Connect to Firegex
if (firegex.login(args.password)):
    puts("Sucessfully logged in ✔", color=colors.green)
else:
    puts("Benchmark Failed: Unknown response or wrong passowrd ✗", color=colors.red)
    exit(1)

def exit_test(code):
    if service_id:
        server.kill()
        if(firegex.nfregex_delete_service(service_id)):
            puts("Sucessfully deleted service ✔", color=colors.green)
        else:
            puts("Test Failed: Coulnd't delete serivce ✗", color=colors.red)
            exit_test(1)        
    exit(code)

#Create new Service

srvs = firegex.nfregex_get_services()
for ele in srvs:
    if ele['name'] == args.service_name:
        firegex.nfregex_delete_service(ele['service_id'])

service_id = firegex.nfregex_add_service(args.service_name, args.port, "tcp", "127.0.0.1/24")
if service_id:
    puts(f"Sucessfully created service {service_id} ✔", color=colors.green)
else:
    puts("Test Failed: Failed to create service ✗", color=colors.red)
    exit(1)

args.port = int(args.port)
args.duration = int(args.duration)
args.num_of_streams = int(args.num_of_streams)

#Start iperf3
def startServer():
    server = iperf3.Server()
    server.bind_address = '127.0.0.1'
    server.port = args.port
    server.verbose = False
    while True:
        server.run()

def getReading(port):
    client = iperf3.Client()
    client.duration = args.duration
    client.server_hostname = '127.0.0.1'
    client.port = port
    client.zerocopy = True
    client.verbose = False
    client.protocol = 'tcp'
    client.num_streams = args.num_of_streams
    return round(client.run().json['end']['sum_received']['bits_per_second']/8e+6 , 3)

server = Process(target=startServer)
server.start()
sleep(1)

custom_regex = [
    '(?:[a-z0-9!#$%&\'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&\'*+/=?^_`{|}~-]+)*|"(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21\\x23-\\x5b\\x5d-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21-\\x5a\\x53-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])+)\\])'
]

def gen_regex():
    """
    if len(custom_regex) == 0:
        regex = secrets.token_hex(8)
    else:
        regex = custom_regex.pop()
    """
    return secrets.token_hex(20)


#Get baseline reading 
puts("Baseline without proxy: ", color=colors.blue, end='')
print(f"{getReading(args.port)} MB/s")

#Start firewall

if firegex.nfregex_start_service(service_id):
    puts(f"Sucessfully started service with id {service_id} ✔", color=colors.green)
else:
    puts("Benchmark Failed: Coulnd't start the service ✗", color=colors.red)
    exit_test(1)

#Get no regexs reading 
results = []
puts("Performance with no regexes: ", color=colors.yellow , end='')
results.append(getReading(args.port))
print(f"{results[0]} MB/s")

#Add all the regexs
for i in range(1,args.num_of_regexes+1):
    regex = gen_regex()
    if not firegex.nfregex_add_regex(service_id,regex,"B",active=True,is_case_sensitive=False): 
        puts("Benchmark Failed: Couldn't add the regex ✗", color=colors.red)
        exit_test(1)
    puts(f"Performance with {i} regex(s): ", color=colors.red, end='')
    results.append(getReading(args.port))
    print(f"{results[i]} MB/s")

with open(args.output_file,'w') as f:
    writer = csv.writer(f)
    for i,result in enumerate(results):
        writer.writerow([i,result])

puts(f"Sucessfully written results to {args.output_file} ✔", color=colors.magenta)

#Delete the Service 
if firegex.nfregex_delete_service(service_id):
    puts(f"Sucessfully delete service with id {service_id} ✔", color=colors.green)
else:
    puts("Test Failed: Couldn't delete service ✗", color=colors.red)
    exit(1)

server.terminate()