"""
Main entry point.
"""

import argparse
import os
import re
import shutil

import cms

import example


def main():
    """
    Ask the user to confirm, then call create_project().
    """

    parser = argparse.ArgumentParser(description="SimpleCMS")
    parser.add_argument("project_name", nargs="?", default=".")
    project_name = parser.parse_args().project_name
    if project_name == ".":
        project_dir = os.getcwd()
        project_name = os.path.basename(project_dir)
    else:
        project_dir = os.path.join(os.getcwd(), project_name)
    if re.match(r"^\w+$", project_name):
        if (
            input(
                f"Do you want to create a new project in {project_dir}? [yN] "
            ).lower()
            == "y"
        ):
            create_project(project_name, project_dir)
    else:
        print(f"Invalid project name: {project_name}")


def create_project(project_name, project_dir):
    """
    Populate project directory with a minimal, working project.
    """

    os.makedirs(project_dir, exist_ok=True)
    with open(os.path.join(project_dir, "requirements.txt"), "w") as f:
        print(f"django-simplecms=={cms.__version__}", file=f)

    example_dir = os.path.dirname(example.__file__)
    app_dir = os.path.join(project_dir, project_name)
    shutil.copytree(example_dir, app_dir, dirs_exist_ok=True)

    with open(
        os.open(
            os.path.join(project_dir, "manage.py"), os.O_CREAT | os.O_WRONLY, 0o755
        ),
        "w",
    ) as f:
        print(
            f"""#!/usr/bin/env python3
import os
import sys

from django.core.management import execute_from_command_line

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "{project_name}.settings")
execute_from_command_line(sys.argv)""",
            file=f,
        )
    with open(os.path.join(project_dir, project_name, "wsgi.py"), "w") as f:
        print(
            f"""import os

from django.core.wsgi import get_wsgi_application

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "{project_name}.settings")
application = get_wsgi_application()""",
            file=f,
        )
    with open(os.path.join(project_dir, ".gitignore"), "w") as f:
        print("*.pyc\n__pycache__/", file=f)

    print(
        f"""
Successfully created project "{project_name}"!

Things to do next:
- create a database
- ./manage.py makemigrations
- ./manage.py migrate
- ./manage.py createsuperuser
- ./manage.py runserver
"""
    )


if __name__ == "__main__":
    main()