#!/usr/bin/python
# -*- coding: utf-8 -*-

import yaml
import logging
import sys
import os
import subprocess


def parse_config(config_file):
    """
    Parse a config file containing users and password used by the different services (tripal, galaxy, chado, ...)

    :param config_file:
    :return:
    """

    config_variables = {}
    logging.debug("Using config: %s" % os.path.abspath(config_file))
    try:
        with open(config_file, 'r') as stream:
            yaml_dict = yaml.safe_load(stream)
            for k, v in yaml_dict.items():
                for k2, v2 in v.items():
                    config_variables[k2] = v2  # Add a key:value pair to variables for replacement in the compose template file

    except FileNotFoundError:
        logging.critical("The config file specified doesn't exist (%s)" % config_file)
        sys.exit()
    except OSError:
        logging.critical("The config file specified cannot be read (%s)" % config_file)
        sys.exit()

    return config_variables


def parse_input(input_file):
    """
    Parse the yml input file to extract data to create the SpeciesData objects
    Return a list of dictionaries. Each dictionary contains data tied to a species

    :param input_file:
    :return:
    """

    parsed_sp_dict_list = []

    if str(input_file).endswith("yml") or str(input_file).endswith("yaml"):
        logging.debug("Input format used: YAML")
    else:
        logging.critical("Error, please input a YAML file")
        sys.exit()
    try:
        with open(input_file, 'r') as stream:
            try:
                yaml_dict = yaml.safe_load(stream)
                for k, v in yaml_dict.items():
                    parsed_sp_dict_list.append(v)
            except yaml.YAMLError:
                logging.critical("YAML input file might be incorrect")
                sys.exit()
    except FileNotFoundError:
        logging.critical("The specified input file doesn't exist (%s)" % input_file)
        sys.exit()
    except OSError:
        logging.critical("The specified input file cannot be read (%s)" % input_file)
        sys.exit()

    return parsed_sp_dict_list


def filter_empty_not_empty_items(li):
    """
    Separate a list between empty items and non empty items.
    Return a dict with 2 keys: empty values (items) and non empty values (items)

    :param li:
    :return:
    """
    filtered_dict = {"empty": [], "not_empty": []}
    for i in li:
        if i is None or i == "":
            filtered_dict["empty"].append(i)
        else:
            filtered_dict["not_empty"].append(i)
    return filtered_dict


def read_galaxy_logs(genus_lowercase, species):
    """
    Read the logs of the galaxy container for the current species to check if the service is "ready"

    :param genus_lowercase:
    :param species:
    :return:
    """

    # Capturing stdout and stderr separately to disable the console output
    # noinspection PyArgumentList
    galaxy_logs = subprocess.run(["docker",  "service",  "logs", genus_lowercase + "_" + species + "_galaxy"],
                                 capture_output=True)
    # Check if the galaxy service is ready (look for the output in logs)
    if "Executing transaction: ...working... done" in str(galaxy_logs.stdout):
        return 1
    else:
        return 0


def get_species_history_id(instance, full_name):
    """
    Set and return the current species history id in its galaxy instance

    :param instance:
    :param full_name:
    :return:
    """

    histories = instance.histories.get_histories(name=str(full_name))
    history_id = histories[0]["id"]
    show_history = instance.histories.show_history(history_id=history_id)

    return [history_id, show_history]


def write_metadata(metadata_file, metadata_dict):
    """

    :param metadata_file:
    :param metadata_dict:
    :return:
    """

    ret = 0

    return metadata_file, metadata_dict, ret