from fastapi import FastAPI, Response
from prometheus_client import generate_latest, CONTENT_TYPE_LATEST

from .service import get_all_coordinates, get_coordinates_for_city
from .metrics import RequestTimer

app = FastAPI(title="Open-Meteo Coordinates Service")


@app.get("/coordinates")
def coordinates():
    with RequestTimer(endpoint="/coordinates", method="GET") as t:
        try:
            return get_all_coordinates()
        except Exception:
            t.set_status("500")
            raise


@app.get("/coordinates/{city}")
def coordinates_for_city(city: str):
    with RequestTimer(endpoint="/coordinates/{city}", method="GET") as t:
        try:
            return get_coordinates_for_city(city)
        except Exception:
            t.set_status("500")
            raise


@app.get("/help")
def help_endpoint():
    return {
        "api_name": "Open-Meteo Coordinates Service",
        "description": "Get geographical coordinates for cities",
        "available_cities": ["Tel Aviv", "Beersheba", "Jerusalem", "Szeged"],
        "endpoints": [
            {
                "path": "/coordinates",
                "method": "GET",
                "description": "Get coordinates for all available cities",
                "example_request": "GET https://open-meteo.dvirlabs.com/coordinates",
                "example_response": {
                    "source": "cache",
                    "data": {
                        "Tel Aviv": {
                            "name": "Tel Aviv",
                            "latitude": 32.08088,
                            "longitude": 34.78057,
                            "country": "Israel"
                        },
                        "Beersheba": {
                            "name": "Beersheba",
                            "latitude": 31.25181,
                            "longitude": 34.7913,
                            "country": "Israel"
                        }
                    }
                }
            },
            {
                "path": "/coordinates/{city}",
                "method": "GET",
                "description": "Get coordinates for a specific city",
                "example_request": "GET https://open-meteo.dvirlabs.com/coordinates/Tel Aviv",
                "example_response": {
                    "source": "cache",
                    "data": {
                        "name": "Tel Aviv",
                        "latitude": 32.08088,
                        "longitude": 34.78057,
                        "country": "Israel"
                    }
                }
            },
            {
                "path": "/healthz",
                "method": "GET",
                "description": "Health check endpoint",
                "example_request": "GET https://open-meteo.dvirlabs.com/healthz",
                "example_response": {
                    "status": "ok"
                }
            },
            {
                "path": "/metrics",
                "method": "GET",
                "description": "Prometheus metrics endpoint",
                "example_request": "GET https://open-meteo.dvirlabs.com/metrics"
            }
        ],
        "usage_examples": {
            "curl_all_cities": "curl https://open-meteo.dvirlabs.com/coordinates",
            "curl_single_city": "curl https://open-meteo.dvirlabs.com/coordinates/Jerusalem",
            "curl_with_spaces": "curl 'https://open-meteo.dvirlabs.com/coordinates/Tel%20Aviv'",
            "python": "import requests\nresponse = requests.get('https://open-meteo.dvirlabs.com/coordinates/Jerusalem')\ndata = response.json()"
        }
    }
        
@app.get("/metrics")
def metrics():
    return Response(generate_latest(), media_type=CONTENT_TYPE_LATEST)


@app.get("/healthz")
def healthz():
    return {"status": "ok"}