import hashlib

import httpx
from fastapi import APIRouter, Query, Request

from app.core.config import settings

router = APIRouter()

CACHE_TTL = 3600


def _cache_key(prefix: str, **kwargs: str) -> str:
    raw = "&".join(f"{k}={v}" for k, v in sorted(kwargs.items()) if v)
    return f"map:{prefix}:{hashlib.md5(raw.encode()).hexdigest()}"


@router.get("/geocoder/reverse")
async def reverse_geocode(
    request: Request,
    location: str = Query(..., description="lat,lng"),
):
    redis = request.app.state.redis
    ck = _cache_key("rev", location=location)
    if redis:
        cached = await redis.get(ck)
        if cached:
            import json
            return json.loads(cached)

    async with httpx.AsyncClient(timeout=5) as client:
        resp = await client.get(
            "https://apis.map.qq.com/ws/geocoder/v1/",
            params={
                "location": location,
                "key": settings.TENCENT_MAP_KEY,
                "get_poi": 1,
            },
        )
        data = resp.json()

    if redis and data.get("status") == 0:
        import json
        await redis.set(ck, json.dumps(data), ex=CACHE_TTL)

    return data


@router.get("/place/search")
async def place_search(
    request: Request,
    keyword: str = Query(...),
    boundary: str = Query(...),
):
    redis = request.app.state.redis
    ck = _cache_key("place", keyword=keyword, boundary=boundary)
    if redis:
        cached = await redis.get(ck)
        if cached:
            import json
            return json.loads(cached)

    async with httpx.AsyncClient(timeout=5) as client:
        resp = await client.get(
            "https://apis.map.qq.com/ws/place/v1/search",
            params={
                "keyword": keyword,
                "boundary": boundary,
                "page_size": 10,
                "page_index": 1,
                "key": settings.TENCENT_MAP_KEY,
            },
        )
        data = resp.json()

    if redis and data.get("status") == 0:
        import json
        await redis.set(ck, json.dumps(data), ex=CACHE_TTL)

    return data