"""
Swiss Parcel (Liegenschaften) Connector

Fetches parcel data from geodienste.ch OGC API Features (Amtliche Vermessung).
Covers all of Switzerland. Returns GeoJSON in WGS84.

Uses: geodienste.ch OGC API - RESF collection (Liegenschaften)
No config override needed - this is the single working solution.
"""

import logging
from typing import Dict, Any

import requests

logger = logging.getLogger(__name__)

# geodienste.ch OGC API - RESF = Liegenschaften (parcels), all Switzerland
# API returns WGS84 directly when bbox-crs=EPSG:2056 is used
_OGC_API_BASE = "https://www.geodienste.ch/db/av_0/deu/ogcapi/collections/RESF/items"
_MAX_ITEMS = 2000
_TIMEOUT = 30


class ZhWfsParcelsConnector:
    """
    Connector for Swiss parcel (Liegenschaften) data via geodienste.ch OGC API.
    Returns GeoJSON FeatureCollection in WGS84.
    """

    def __init__(self, timeout: int = _TIMEOUT):
        self.timeout = timeout
        logger.info("ZhWfsParcelsConnector initialized (geodienste.ch OGC API)")

    def get_parcels_by_bbox(self, bbox: str) -> Dict[str, Any]:
        """
        Fetch parcels within bounding box.
        Returns GeoJSON FeatureCollection in WGS84 (EPSG:4326).

        Args:
            bbox: Bounding box as "minx,miny,maxx,maxy" in LV95 (EPSG:2056)

        Returns:
            GeoJSON FeatureCollection with geometries in WGS84
        """
        try:
            parts = [p.strip() for p in bbox.split(",")]
            if len(parts) != 4:
                raise ValueError(f"Invalid bbox: expected minx,miny,maxx,maxy, got {bbox}")
            minx, miny, maxx, maxy = (float(p) for p in parts)

            params = {
                "f": "json",
                "limit": _MAX_ITEMS,
                "bbox": f"{minx},{miny},{maxx},{maxy}",
                "bbox-crs": "http://www.opengis.net/def/crs/EPSG/0/2056",
            }

            logger.debug(f"Requesting parcels: bbox={bbox}")
            resp = requests.get(_OGC_API_BASE, params=params, timeout=self.timeout)

            if resp.status_code != 200:
                logger.error(f"Parcel API failed: status={resp.status_code}, body={resp.text[:500]}")
                return {"type": "FeatureCollection", "features": []}

            data = resp.json()

            # OGC API returns FeatureCollection in WGS84 directly
            features = data.get("features", [])
            if not features:
                return {"type": "FeatureCollection", "features": []}

            # Pass through - geodienste returns WGS84 GeoJSON
            result = {
                "type": "FeatureCollection",
                "features": features,
            }
            logger.info(f"Returned {len(features)} parcels in WGS84")
            return result

        except ValueError as e:
            logger.warning(f"Invalid bbox: {e}")
            raise
        except requests.RequestException as e:
            logger.error(f"Parcel API request error: {e}")
            return {"type": "FeatureCollection", "features": []}
        except Exception as e:
            logger.error(f"Error fetching parcels: {e}", exc_info=True)
            return {"type": "FeatureCollection", "features": []}