import requests
import docker
import concurrent.futures
import time
import sys
import os
from graph import generate_req_graph, generate_resource_graph
from math import floor

if len(sys.argv) != 3 or sys.argv[1] == '-h' or sys.argv[1] == '--help':
    print("Usage: python testes.py <framework name> <container name>")
    sys.exit(1)

THREADS = 10
FRAMEWORK_NAME = sys.argv[1]
CONTAINER_NAME = sys.argv[2]
URL_BASE = 'http://172.26.48.1:9080'
API_REQUESTS = [
    ('/status/ok', range(0, 30_000, 5000)),
    ('/image/load-image', range(0, 30_000, 5000)),
    ('/static/simpleimage.png', range(0, 30_000, 5000)),
    ('/image/load-big-image', range(0, 1_000, 200)),
    ('/static/bigimage.png', range(0, 1_000, 200)),
    ('/static/video.mp4', range(0, 10_000, 1_000)),
]

def send_request(url):
    success = False
    responses = {
        2: 0, # OK
        4: 0, # Bad Request
        5: 0, # Server Error
    }
    while not success:
        try:
            response = requests.get(url)
        except:
            continue
        success = response.status_code == 200
        responses[floor(response.status_code/100)] += 1
    return responses

def getFileNames(endpoint):
    endpoint = endpoint.replace('/', '')

    files = [
        f"req_{FRAMEWORK_NAME}_{endpoint}.csv",
        f"resource_{FRAMEWORK_NAME}_{endpoint}.csv",
    ]

    return files

def record(filename, requests, reqpersec):
    with open(filename, "a") as file:
        file.write(f"{requests},{reqpersec}\n")

def record_resource(filename, requests, cpu, ram):
    with open(filename, "a") as file:
        file.write(f"{requests},{cpu},{ram}\n")

def run_tests(endpoint, num_requests):
    files = getFileNames(endpoint)
    for filename in files:
        if os.path.exists(filename):
            os.remove(filename)

    for num_request in num_requests:
        if num_request <= 0: continue

        ok_responses = 0
        bad_responses = 0
        server_errors = 0
        cpu, ram = 0, 0

        with concurrent.futures.ThreadPoolExecutor(max_workers=THREADS) as executor:
            url = f'{URL_BASE}{endpoint}'

            start_time = time.time()

            futures = []
            #with requests.Session() as session:
            #    futures = [executor.submit(send_request, session, url) for _ in range(num_request)]
            futures = [executor.submit(send_request, url) for _ in range(num_request)]

            concurrent.futures.wait(futures)

            cpu, ram = get_resource_usage()

            elapsed_time = time.time() - start_time

            for future in futures:
                responses = future.result()
                ok_responses += responses[2]
                bad_responses += responses[4]
                server_errors += responses[5]

        print(f"{num_request}: {elapsed_time:.2f} seconds. {elapsed_time/num_request:.4f} seconds per request. {num_request/elapsed_time:.2f} requests per second. [OK: {ok_responses}, Bad Request: {bad_responses}, Server Error: {server_errors}]]")
        record(files[0], num_request, f"{num_request/elapsed_time:.2f}")
        record_resource(files[1], num_request, cpu, ram)

        generate_req_graph(files[0], FRAMEWORK_NAME, endpoint)
        generate_resource_graph(files[1], FRAMEWORK_NAME, endpoint)

        time.sleep(3)

def get_resource_usage():
    try:
        client = docker.from_env()
        stats = client.containers.get(CONTAINER_NAME).stats(stream=False)
    except:
        return 0, 0 # unable to get stats

    return get_cpu_usage(stats), get_ram_usage(stats)

def get_cpu_usage(stats):
    UsageDelta = stats['cpu_stats']['cpu_usage']['total_usage'] - stats['precpu_stats']['cpu_usage']['total_usage']
    SystemDelta = stats['cpu_stats']['system_cpu_usage'] - stats['precpu_stats']['system_cpu_usage']
    len_cpu = stats['cpu_stats']['online_cpus']
    percentage = (UsageDelta / SystemDelta) * len_cpu * 100
    return f"{percentage:.2f}"

def get_ram_usage(stats):
    usage = stats['memory_stats']['usage']
    limit = stats['memory_stats']['limit']

    percentage = (usage / limit) * 100

    # percent = round(percentage, 2)
    return f"{percentage:.2f}"


for endpoint, num_requests in API_REQUESTS:
    print(f"# {endpoint}")
    run_tests(endpoint, num_requests)