#!/usr/bin/env python
"""
Install initial orgtool config and spec files into user's home directory

Usage:
  orgtool-spec-init [-h | --help] [--config FILE] [--spec-dir PATH]

Options:
  -h, --help        Show this message and exit.
  --config FILE     Where to install AWS Org config file
                    [Default: ~/.orgtool/config.yaml].
  --spec-dir PATH   Where to install AWS Org specification files
                    [Default: ~/.orgtool/spec.d].
"""
import logging
import os
import shutil
import sys

import pkg_resources
from docopt import docopt


def main():

    args = docopt(__doc__)

    log_level = logging.INFO
    log_format = "%(name)s: %(levelname)-9s%(message)s"
    logging.basicConfig(stream=sys.stdout, format=log_format, level=log_level)
    log = logging.getLogger(__name__)
    log.info("Laurent Delhomme <delhom@amazon.com> AWS June 2020")

    errors = []
    source_dir = os.path.abspath(
        pkg_resources.resource_filename(__name__, "../spec_init_data.sample"),
    )
    source_config_file = os.path.join(source_dir, "config.yaml")
    source_spec_dir = os.path.join(source_dir, "spec.d")
    target_config_file = os.path.expanduser(args["--config"])
    target_config_dir = os.path.dirname(target_config_file)
    target_spec_dir = os.path.expanduser(args["--spec-dir"])

    if os.path.exists(target_config_file):
        errors.append(
            "Config file '{}' exists. "
            "Refusing to overwrite.".format(target_config_file),
        )
    else:
        try:
            os.makedirs(target_config_dir)
        except OSError:
            if not os.path.isdir(target_config_dir):
                raise
        shutil.copy(source_config_file, target_config_file)

    try:
        os.makedirs(target_spec_dir)
    except OSError:
        if not os.path.isdir(target_spec_dir):
            raise
    if os.listdir(target_spec_dir):
        errors.append(
            "Spec directory '{}' exists and is not empty. "
            "Refusing to overwrite.".format(target_spec_dir),
        )
    else:
        for file in os.listdir(source_spec_dir):
            shutil.copy(
                os.path.join(source_spec_dir, file),
                target_spec_dir,
            )

    log.info(
        f"Sample config created from {source_dir} to {target_config_dir}.",
    )

    if errors:
        sys.exit("\n".join(errors))


if __name__ == "__main__":
    main()