from __future__ import annotations

from django.core.management.base import BaseCommand

import os
from pathlib import Path
from django.conf import settings
from django.core.files import File

from cms.models import create_demo_data, PostCategory, Post
from orgs.models import Organization


class Command(BaseCommand):
    help = "Seed demo categories and posts for the CMS app (optionally per organization)"

    def handle(self, *args, **options):
        org_ident = options.get("org")
        org = None
        if org_ident:
            if org_ident.isdigit():
                org = Organization.objects.filter(pk=int(org_ident)).first()
            if org is None:
                org = Organization.objects.filter(code=org_ident).first() or Organization.objects.filter(name=org_ident).first()
            if org is None:
                raise SystemExit(self.style.ERROR(f"Organization not found: {org_ident}"))
        # Ensure root category per org if org is provided
        if org is not None:
            root_name = f"{org.code}_root"
            root_slug = f"{org.code}-root"
            root, _ = PostCategory.objects.get_or_create(
                organization=org,
                slug=root_slug,
                defaults={
                    "name": root_name,
                    "parent": None,
                    "description": f"Root category for {org.code}",
                },
            )

        result = create_demo_data(org=org)

        # Move all top-level categories under the root (excluding the root itself)
        if org is not None:
            # Re-fetch root to be safe
            root = PostCategory.objects.get(organization=org, slug=f"{org.code}-root")
            top_levels = PostCategory.objects.filter(organization=org, parent__isnull=True).exclude(pk=root.pk)
            for cat in top_levels:
                cat.parent = root
                cat.save()

        # Attach demo feature images from static/demo/ if available
        try:
            demo_dir = Path(settings.BASE_DIR) / "static" / "demo"
            if demo_dir.exists() and demo_dir.is_dir():
                image_files = [p for p in sorted(demo_dir.iterdir()) if p.suffix.lower() in {".jpg", ".jpeg", ".png", ".webp", ".gif"}]
            else:
                image_files = []
        except Exception:
            image_files = []

        if image_files:
            posts_qs = Post.objects.all().order_by("id")
            if org is not None:
                posts_qs = posts_qs.filter(organization=org)
            idx = 0
            for post in posts_qs:
                if not getattr(post, "feature_image", None) or not post.feature_image:
                    img_path = image_files[idx % len(image_files)]
                    try:
                        with open(img_path, "rb") as fh:
                            post.feature_image.save(img_path.name, File(fh), save=True)
                    except Exception:
                        # Skip on any IO error and continue with next
                        pass
                    idx += 1
        suffix = f" for org {org.code}" if org else ""
        self.stdout.write(self.style.SUCCESS(
            f"CMS demo data seeded{suffix}: categories={result.get('categories', 0)}, posts={result.get('posts', 0)}"
        ))

    def add_arguments(self, parser):
        parser.add_argument("--org", help="Organization code, id, or name to seed CMS data for", default=None)