from django.core.management.base import BaseCommand, CommandError
from datetime import datetime
from pathlib import Path
from textwrap import dedent


class Command(BaseCommand):
    help = "Create a new blog post markdown file"

    def add_arguments(self, parser):
        parser.add_argument(
            "--title",
            default="Enter Title Here",
            help="Post title",
        )
        parser.add_argument(
            "--description",
            default="",
            help="Post description",
        )
        parser.add_argument(
            "--category",
            default="news",
            help="Post category",
        )
        parser.add_argument(
            "--author",
            default="nobo",
            help="Author name",
        )

    def handle(self, *args, **options):
        title = options["title"]
        description = options["description"]
        category = options["category"]
        author = options["author"]

        today = datetime.today().strftime("%Y-%m-%d")

        output_dir = Path("content/blog")
        output_dir.mkdir(parents=True, exist_ok=True)

        filename = output_dir / f"{today}.md"

        if filename.exists():
            raise CommandError(f"File already exists: {filename}")

        content = dedent(
            """\
            ---
            title: {title}
            description: {description}
            date: {today}
            categories:
              - {category}
            authors:
              - {author}
            ---

            A New Post
            """
        ).format(
            title=title,
            description=description,
            today=today,
            category=category,
            author=author,
        )

        filename.write_text(content, encoding="utf-8")

        self.stdout.write(self.style.SUCCESS(f"Created {filename}"))