"""Sitemap & robots.txt API: tenant-aware SEO files served by the backend.

Because this is a white-label app where each tenant has its own domain
(set via KMTN_WEBSITE_URL), sitemap.xml and robots.txt are generated
on-the-fly from the station config — no static files needed.

This matches the reviewer feedback:
  'This is a whitelabel app - this file may need to be dynaimcally generated...'

Follows the same pattern as theme_export.py: content is derived from
KMTN_WEBSITE_URL at runtime, so every tenant gets their own correct URL.
"""

from typing import Any, Dict

from fastapi import APIRouter, Depends, Response, status as http_status

from app.auth import get_current_admin_user
from app.config import settings
from app.sitemap_export import build_robots_txt, build_sitemap_xml
from app.user_models import User

router = APIRouter()


@router.get("/sitemap.xml")
async def get_sitemap() -> Response:
    """Return a dynamically-generated sitemap.xml. Public endpoint.

    Uses KMTN_WEBSITE_URL so each tenant gets the correct domain.
    """
    xml = build_sitemap_xml(settings.WEBSITE_URL)
    return Response(content=xml, media_type="application/xml")


@router.get("/robots.txt")
async def get_robots() -> Response:
    """Return a dynamically-generated robots.txt. Public endpoint.

    Uses KMTN_WEBSITE_URL so the Sitemap directive points to the
    correct tenant domain.
    """
    txt = build_robots_txt(settings.WEBSITE_URL)
    return Response(content=txt, media_type="text/plain")


@router.post("/regenerate", status_code=http_status.HTTP_200_OK)
async def regenerate_sitemap(
    _: User = Depends(get_current_admin_user),
) -> Dict[str, Any]:
    """Force regenerate the sitemap cache. Admin only.

    In the dynamic model this is a no-op (files are generated per-request),
    but kept for API consistency with the theme endpoint.
    """
    return {
        "status": "ok",
        "note": "sitemap and robots.txt are dynamically generated per-request using KMTN_WEBSITE_URL",
        "base_url": settings.WEBSITE_URL,
    }