# Copyright 2019 3YOURMIND GmbH

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

# http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from __future__ import print_function

import os
import sys

from .constants import MIGRATION_FOLDER_NAME


def is_django_project(path):
    django_manage_file = os.path.join(path, "manage.py")
    return os.path.isfile(django_manage_file)


def is_directory(path):
    return os.path.isdir(path)


def print_stderr(*args, **kwargs):
    print(*args, file=sys.stderr, **kwargs)


def find_project_settings_module(path):
    """Explore path recursively to the first settings.py file
    and translate the name to package notation 'mysite.settings'
    """
    for root, dirs, files in os.walk(path):
        for file_name in files:
            if file_name == "settings.py":
                return (
                    os.path.join(root.replace(path, ""), file_name)
                    .replace("/", ".")
                    .rstrip(".py")
                )


def split_path(path):
    a, b = os.path.split(path)
    return (split_path(a) if (len(a) > 0 and a != "/") else []) + [b]


def split_migration_path(migration_path):
    decomposed_path = split_path(migration_path)
    for i, p in enumerate(decomposed_path):
        if p == MIGRATION_FOLDER_NAME:
            return (decomposed_path[i - 1], os.path.splitext(decomposed_path[i + 1])[0])


def compose_migration_path(django_folder, app_name, migration):
    return os.path.join(
        django_folder, app_name, MIGRATION_FOLDER_NAME, "{0}.py".format(migration)
    )


def clean_bytes_to_str(byte_input):
    return byte_input.decode("utf-8").strip()