import os
import json
from pymongo import MongoClient
from dotenv import load_dotenv
from trip_utils import format_trip_summary

load_dotenv()

client = MongoClient(os.getenv("MONGODB_URI"))
db = client.get_database()
collection = db.get_collection("travelrecords")


def fetch_trips_by_location(city: str) -> str:
    """
    Fetch all trip records to a given city across all users, using name fuzzy match
    AND exact latitude/longitude match to ensure consistent location.
    """
    reference = collection.find_one({
        "$or": [
            {"destinationName": {"$regex": city, "$options": "i"}},
            {"locationName": {"$regex": city, "$options": "i"}}
        ],
        "latitude": {"$exists": True},
        "longitude": {"$exists": True}
    })

    if not reference:
        return json.dumps({
            "type": "text",
            "message": f"No travel records found for {city}."
        })

    lat = reference.get("latitude")
    lon = reference.get("longitude")

    records = list(collection.find({
        "latitude": lat,
        "longitude": lon
    }))

    if not records:
        return json.dumps({
            "type": "text",
            "message": f"No travel records found for {city}."
        })

    summaries = [format_trip_summary(rec) for rec in records]
    result = "\n---\n".join(summaries)

    return json.dumps({
        "type": "text",
        "message": result
    })