LCSOGthb / AirMerge

export default function Dashboard() {

  // Geolocation & error state

  const [coords, setCoords] = useState<Coords | null>(null);

  const [error, setError] = useState<string | null>(null);

  // API data state

  const [owmCurr, setOwmCurr] = useState<any>(null);

  const [owmF, setOwmF] = useState<Pollutant[]>([]);

  const [owmH, setOwmH] = useState<Pollutant[]>([]);

  const [aq, setAq] = useState<any>(null);

  // Ask for GPS once on mount

  useEffect(() => {

    if (!navigator.geolocation) {

      setError('Geolocation is not supported by this browser.');

      return;

    }

    navigator.geolocation.getCurrentPosition(

      ({ coords: { latitude, longitude } }) => {

        setCoords({ lat: latitude, lon: longitude });

      },

      (err) => {

        let msg: string;

        switch (err.code) {

          case err.PERMISSION_DENIED:

            msg = 'Permission denied. Please allow location access in your browser settings.';

            break;

          case err.POSITION_UNAVAILABLE:

            msg = 'Location information is unavailable.';

            break;

          case err.TIMEOUT:

            msg = 'The request to get your location timed out.';

            break;

          default:

            msg = 'An unknown error occurred.';

        }

        console.error('Geolocation error', err.code, err.message);

        setError(msg);

      }

    );

  }, []);

  // Fetch AQ data when we have coords

  useEffect(() => {

    if (!coords) return;

    const { lat, lon } = coords;

    const now = Math.floor(Date.now() / 1000);

    fetchOwm('air_pollution', lat, lon).then(setOwmCurr);

    fetchOwm('forecast', lat, lon).then(r =>

      setOwmF(r.list.map((d: any) => ({ dt: d.dt, aqi: d.main.aqi * 50 })))

    );

    fetchOwm('history', lat, lon, now - 86400, now).then(r =>

      setOwmH(r.list.map((d: any) => ({ dt: d.dt, aqi: d.main.aqi * 50 })))

    );

    fetchAqicn(lat, lon).then(setAq);

  }, [coords]);

  // Manual‑entry + waiting state

  if (!coords) {

    return (

      <div className="dashboard">

        <p>{error || 'Waiting for location…'}</p>

        <button

          onClick={async () => {

            const input = window.prompt(

              'Enter location as "lat,lon" or place name (e.g. "Banting, Selangor")'

            );

            if (!input) return;

            const parts = input.split(',').map(s => s.trim());

            // If two numbers: coords

            if (

              parts.length === 2 &&

              !isNaN(+parts[0]) &&

              !isNaN(+parts[1])

            ) {

              setCoords({ lat: +parts[0], lon: +parts[1] });

              setError(null);

              return;

            }

            // Else try geocoding via OpenStreetMap Nominatim

            try {

              const resp = await fetch(

                `https://nominatim.openstreetmap.org/search?q=${encodeURIComponent(

                  input

                )}&format=json&limit=1`

              );

              const results = await resp.json();

              if (results.length === 0) {

                setError('Location not found. Try another name.');

              } else {

                setCoords({

                  lat: parseFloat(results[0].lat),

                  lon: parseFloat(results[0].lon),

                });

                setError(null);

              }

            } catch (e: any) {

              console.error('Geocoding error', e);

              setError('Geocoding failed. Please try again.');

            }

          }}

        >

          Enter location manually

        </button>

      </div>

    );

  }

  // Loading state for API data

  if (!owmCurr || !aq) {

    return <div className="dashboard">Loading air quality…</div>;

  }

  // Prepare data sources

  const sources = [

    {

      title: 'OpenWeatherMap',

      aqi: owmCurr.list[0].main.aqi * 50,

      comps: owmCurr.list[0].components,

      time: new Date(owmCurr.list[0].dt * 1000).toLocaleString(),

    },

    {

      title: 'AQICN',

      aqi: aq.data.aqi,

      comps: Object.fromEntries(

        Object.entries(aq.data.iaqi).map(([k, v]: any) => [k, v.v])

      ),

      time: new Date(aq.data.time.iso).toLocaleString(),

    },

  ];

  return (

    <div className="dashboard">

      <h1>AirMerge</h1>

      <div className="grid">

        {sources.map(({ title, aqi, comps, time }) => (

          <div

            key={title}

            className="card"

            style={{ borderLeft: `6px solid ${aqColor(aqi)}` }}

          >

            <h2>{title}</h2>

            <p className="aqi">AQI: {aqi}</p>

            <p>Time: {time}</p>

            <ul className="components">

              {Object.entries(comps).map(([pollutant, value]) => (

                <li key={pollutant}>

                  <span>{pollutant.toUpperCase()}</span>

                  <span>{(value as number).toFixed(1)}</span>

                </li>

              ))}

            </ul>

          </div>

        ))}

      </div>

      <h2>📊 Historical (24h) & Forecast (4d)</h2>

      <div className="chart-container">

        <ChartComp hist={owmH} fore={owmF} />

      </div>

      <h2>🗺️ Map Overlay</h2>

      <div className="map-container">

        <MapComp lat={coords.lat} lon={coords.lon} />

      </div>

    </div>