from fastapi import FastAPI, Request
from fastapi.responses import JSONResponse
from fastapi.middleware.cors import CORSMiddleware
import json
import requests

app = FastAPI()

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_methods=["*"],
    allow_headers=["*"],
)

with open("weather_codes.json", "r") as f:
    weather_code_meanings = json.load(f)

@app.post("/get-weather")
async def get_weather(request: Request):
    try:
        data = await request.json()
        city = data.get("city")
        if not city:
            return JSONResponse(content={"report": "❌ City not provided."})

        geo_url = f"https://geocoding-api.open-meteo.com/v1/search?name={city}&count=1"
        geo_data = requests.get(geo_url).json()

        if not geo_data.get("results"):
            return JSONResponse(content={"report": "❌ City not found."})

        loc = geo_data["results"][0]
        lat, lon = loc["latitude"], loc["longitude"]
        name = loc["name"]

        weather_url = f"https://api.open-meteo.com/v1/forecast?latitude={lat}&longitude={lon}&current_weather=true"
        weather_data = requests.get(weather_url).json()
        current = weather_data["current_weather"]

        condition = weather_code_meanings.get(str(current["weathercode"]), "Unknown")

        report = f""" Weather Report for {name}
 Time: {current['time']}
 Condition: {condition}
 Day or Night: {"Daytime" if current["is_day"] else "Nighttime"}
 Temperature: {current['temperature']}°C
 Wind Speed: {current['windspeed']} km/h"""

        return JSONResponse(content={"report": report})
    except Exception as e:
        return JSONResponse(content={"report": f"❌ Error: {str(e)}"})