package

#!/usr/bin/env python3
# Copyright 2019 Katteli Inc.
# TestFlows.com Open-Source Software Testing Framework (http://testflows.com)
#
# 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.
import os
import re
import sys
import shutil
import argparse
import subprocess

from urllib.parse import urlparse
from datetime import datetime, timezone

parser = argparse.ArgumentParser(description="TestFlows - Core build script")
parser.add_argument(
    "--debug", help="enable debugging", action="store_true", default=False
)

current_dir = os.path.dirname(os.path.abspath(__file__))
package = os.path.join("testflows", "_core")
init_path = os.path.join(current_dir, package, "__init__.py")
setup_path = os.path.join(current_dir, "setup.py")


def clean_url(url, rchop=None):
    if "git@github.com:" in url:
        url = f"https://github.com/{url.split('git@github.com:',1)[-1]}"
        url = url.rsplit(".git", 1)[0]
    parsed = urlparse(url)
    cleaned_url = parsed._replace(netloc="{}".format(parsed.hostname)).geturl()
    if rchop and cleaned_url.endswith(rchop):
        cleaned_url[: -len(rchop)]
    return cleaned_url


def call(*command):
    return subprocess.run(command, check=True, capture_output=True, encoding="utf-8")


repo_name = clean_url(call("git", "remote", "get-url", "origin").stdout.strip())
repo_commit = call("git", "rev-parse", "HEAD").stdout.strip()
repo_branch = call("git", "branch").stdout.lstrip("*").strip()


def get_base_version():
    """Return package base version."""
    version = None
    with open(init_path) as fd:
        for line in fd.readlines():
            if line.startswith("__version__ = "):
                match = re.match(r'__version__\s=\s"(?P<version>.+).__VERSION__', line)
                if match:
                    version = match.groupdict().get("version")
                    if version:
                        break
    if not version:
        raise ValueError("failed to get base version number")
    return version


def get_revision():
    """Return build revision."""
    now = datetime.now(timezone.utc)
    major_revision = now.strftime("%y%m%d")
    minor_revision = now.strftime("%H%M%S")
    return major_revision + ".1" + minor_revision


def set_attributes(path, **attrs):
    """Set attributes in the file.

    :param path: path
    :param version: version
    """
    with open(path, "a+") as fd:
        fd.seek(0)
        content = fd.read()
        fd.seek(0)
        fd.truncate()
        new_content = content
        for key, value in attrs.items():
            new_content = new_content.replace(key, value)
        fd.write(new_content)
    return content


def unset_attributes(path, content):
    """Unset attributes in the file.

    :param path: path
    :param content: original file content
    """
    with open(path, "a+") as fd:
        fd.seek(0)
        fd.truncate()
        fd.write(content)


def build_package(args, options):
    """Build package.

    :param args: arguments
    :param options: extra options
    """
    subprocess.run(
        ["/usr/bin/env", "python3", "setup.py"]
        + (["-q"] if not args.debug else [])
        + ["sdist"]
        + (options if options else [])
    )


def build(args, options=None):
    """Build package.

    :param args: arguments
    :param options: build options, default: ``None``
    """
    if options is None:
        options = []

    if os.path.exists("dist"):
        shutil.rmtree("dist")

    base_version = get_base_version()
    revision = get_revision()
    version = ".".join([base_version, revision])
    init_content, setup_content = None, None
    attrs = {
        "__REPOSITORY__": repo_name,
        "__COMMIT__": repo_commit,
        "__BRANCH__": repo_branch,
    }

    try:
        init_content = set_attributes(init_path, **{"__VERSION__": revision}, **attrs)
        setup_content = set_attributes(setup_path, **{"__VERSION__": version})
        build_package(args, options)
    finally:
        if init_content:
            unset_attributes(init_path, init_content)
        if setup_content:
            unset_attributes(setup_path, setup_content)


if __name__ == "__main__":
    args = parser.parse_args()
    build(args)