from urllib.parse import urlencode

from pyproj import Transformer
import requests
import logging
from typing import Tuple, Optional, Dict, Any

logger = logging.getLogger("CamptocampAPI")

class CamptocampAPI:
    """
    A Python wrapper for the Camptocamp.org REST API v6.
    Supports querying outings, routes, waypoints, and more.
    """

    BASE_URL = "https://api.camptocamp.org"

    def __init__(self, language: str = "en") -> None:
        self.language = language

    from urllib.parse import urlencode

    def _request(self, endpoint: str, params: Dict[str, Any]) -> Dict[str, Any]:
        params["pl"] = self.language
        url = f"{self.BASE_URL}{endpoint}"
        full_url = f"{url}?{urlencode(params)}"

        logger.info(f"[API REQUEST] {url} with params: {params}")
        logger.info(f"[DEBUG URL] curl '{full_url}'")

        response = requests.get(url, params=params)
        response.raise_for_status()
        return response.json()

    def get_outings(
        self,
        bbox: Tuple[float, float, float, float],
        date_range: Optional[Tuple[str, str]] = None,
        activity: Optional[str] = None,
        limit: int = 10
    ) -> Dict[str, Any]:
        params = {
            "bbox": ",".join(map(str, bbox)),
            "limit": limit,
            "orderby": "-date"
        }
        if date_range:
            params["date"] = f"{date_range[0]},{date_range[1]}"
        if activity:
            params["act"] = activity
        return self._request("/outings", params)

    def search_routes_by_activity(
        self,
        bbox: Tuple[float, float, float, float],
        activity: str,
        limit: int = 10
    ) -> Dict[str, Any]:
        params = {
            "bbox": ",".join(map(str, bbox)),
            "act": activity,
            "limit": limit,
            "orderby": "-date"
        }
        return self._request("/routes", params)

    def get_route_details(self, route_id: int) -> Dict[str, Any]:
        return self._request(f"/routes/{route_id}/{self.language}", {})

    def search_waypoints(
        self,
        bbox: Tuple[float, float, float, float],
        limit: int = 10
    ) -> Dict[str, Any]:
        params = {
            "bbox": ",".join(map(str, bbox)),
            "limit": limit
        }
        return self._request("/waypoints", params)

    @staticmethod
    def get_bbox_from_location(query: str) -> Optional[Tuple[float, float, float, float]]:
        """
        Geocode a location string and return a bounding box.

        Args:
            query: Name of the place or location (e.g., "Chamonix, France").

        Returns:
            Bounding box as (west, south, east, north) or None if not found.
        """
        url = "https://nominatim.openstreetmap.org/search"
        params = {
            "q": query,
            "format": "json",
            "limit": 1
        }
        headers = {"User-Agent": "camptocamp-api-wrapper"}
        logger.info(f"Geocoding location: {query}")
        response = requests.get(url, params=params, headers=headers)
        response.raise_for_status()
        results = response.json()
        if not results:
            logger.warning(f"No results found for: {query}")
            return None
        bbox = results[0]["boundingbox"]
        logger.info(f"BBox for '{query}': {bbox}")
        return CamptocampAPI.convert_bbox_to_webmercator((
            float(bbox[2]),  # west
            float(bbox[0]),  # south
            float(bbox[3]),  # east
            float(bbox[1])   # north
        ))

    @staticmethod
    def convert_bbox_to_webmercator(bbox: Tuple[float, float, float, float]) -> Tuple[int, int, int, int]:
        """
        Convert a WGS84 bbox (lon/lat) to EPSG:3857 (Web Mercator) in meters.

        Args:
            bbox: (west, south, east, north) in degrees

        Returns:
            (west, south, east, north) in meters
        """
        transformer = Transformer.from_crs("epsg:4326", "epsg:3857", always_xy=True)
        west, south = transformer.transform(bbox[0], bbox[1])
        east, north = transformer.transform(bbox[2], bbox[3])
        return int(west), int(south), int(east), int(north)