#!/usr/bin/python3.7

import docker
import os
import shutil
import tarfile
import uuid

from robot.api.deco import keyword
from robot.api import logger

from common import *

ROBOT_AUTO_KEYWORDS = False
# TODO: get this variable from env
LOGS_DIR = 'artifacts/'

@keyword('Generate file of bytes')
def generate_file_of_bytes(size: str) -> str:
    """
    Function generates big binary file with the specified size in bytes.
    :param size:        the size in bytes, can be declared as 6e+6 for example
    """
    size = int(float(size))
    filename = TEMP_DIR + str(uuid.uuid4())
    with open(filename, 'wb') as fout:
        fout.write(os.urandom(size))
    logger.info(f"Random binary file with size {size} bytes has been generated.")
    return f"{os.getcwd()}/{filename}"

@keyword('Get Docker Logs')
def get_container_logs(testcase_name: str) -> None:
    client = docker.APIClient(base_url='unix://var/run/docker.sock')
    tar_name = f"{LOGS_DIR}/dockerlogs({testcase_name}).tar.gz"
    tar = tarfile.open(tar_name, "w:gz")
    for container in client.containers():
        container_name = container['Names'][0][1:]
        if client.inspect_container(container_name)['Config']['Domainname'] == "neofs.devenv":
            file_name = f"{LOGS_DIR}/docker_log_{container_name}"
            with open(file_name,'wb') as out:
                out.write(client.logs(container_name))
            logger.info(f"Collected logs from container {container_name}")
            tar.add(file_name)
            os.remove(file_name)
    tar.close()

@keyword('Cleanup Files')
def cleanup_file() -> None:
    if os.path.isdir(TEMP_DIR):
        try:
            shutil.rmtree(TEMP_DIR)
            logger.info(f"File '{TEMP_DIR}' has been deleted.")
        except OSError as e:
            raise Exception(f"Error: '{TEMP_DIR}' - {e.strerror}.")
    else:
        logger.warn(f"Error: '{TEMP_DIR}' file not found")

@keyword('Create Temporary Directory')
def create_temp_dir() -> None:
    if not os.path.exists(TEMP_DIR):
        os.makedirs(TEMP_DIR)
        logger.info(f"Created temporary directory: {TEMP_DIR}")