import httpx
from fastapi import APIRouter, HTTPException, Query
from app.config import settings
from app.internal.logger import logger

router = APIRouter(prefix="/places", tags=["places"])

_PLACES_SEARCH_URL = "https://places.googleapis.com/v1/places:searchText"
_ROUTES_URL        = "https://routes.googleapis.com/directions/v2:computeRoutes"
_PLACES_FIELDS     = "places.id,places.displayName,places.formattedAddress,places.rating,places.googleMapsUri,places.location"


@router.get("/search")
async def search_places(query: str = Query(...), near: str = Query("")):
    if not settings.google_maps_api_key:
        raise HTTPException(503, "Google Maps API not configured.")

    full_query = f"{query} {near}".strip()
    try:
        async with httpx.AsyncClient(timeout=10) as client:
            r = await client.post(
                _PLACES_SEARCH_URL,
                json={"textQuery": full_query},
                headers={
                    "X-Goog-Api-Key": settings.google_maps_api_key,
                    "X-Goog-FieldMask": _PLACES_FIELDS,
                },
            )
            r.raise_for_status()
            data = r.json()
    except Exception as e:
        logger.error(f"Places search failed: {e}")
        raise HTTPException(502, "Places search failed.")

    return [
        {
            "name": p.get("displayName", {}).get("text"),
            "address": p.get("formattedAddress"),
            "place_id": p.get("id"),
            "lat": p.get("location", {}).get("latitude"),
            "lng": p.get("location", {}).get("longitude"),
            "maps_link": p.get("googleMapsUri"),
            "rating": p.get("rating"),
        }
        for p in data.get("places", [])[:6]
    ]


@router.get("/directions")
async def get_directions(
    origin: str = Query(...),
    destination: str = Query(...),
):
    if not settings.google_maps_api_key:
        raise HTTPException(503, "Google Maps API not configured.")

    try:
        async with httpx.AsyncClient(timeout=10) as client:
            r = await client.post(
                _ROUTES_URL,
                json={
                    "origin": {"address": origin},
                    "destination": {"address": destination},
                    "travelMode": "DRIVE",
                },
                headers={
                    "X-Goog-Api-Key": settings.google_maps_api_key,
                    "X-Goog-FieldMask": "routes.duration,routes.distanceMeters",
                },
            )
            r.raise_for_status()
            data = r.json()
    except Exception as e:
        logger.error(f"Directions failed: {e}")
        raise HTTPException(502, "Directions request failed.")

    routes = data.get("routes", [])
    if not routes:
        return {"duration_text": None, "duration_seconds": None, "distance_text": None}

    route = routes[0]
    duration_seconds = int(route.get("duration", "0s").rstrip("s") or 0)
    distance_m = route.get("distanceMeters", 0)

    # Format human-readable strings
    hours, rem = divmod(duration_seconds, 3600)
    mins = rem // 60
    if hours:
        duration_text = f"{hours} hr {mins} min" if mins else f"{hours} hr"
    else:
        duration_text = f"{mins} min"

    miles = distance_m / 1609.34
    distance_text = f"{miles:.1f} mi"

    return {
        "duration_text": duration_text,
        "duration_seconds": duration_seconds,
        "distance_text": distance_text,
    }