import { NextResponse } from 'next/server';

const ZIP = process.env.WEATHER_ZIP || '16046';

export async function GET(request) {
  const { searchParams } = new URL(request.url);
  const location = searchParams.get('location') || ZIP;

  try {
    const res = await fetch(`https://wttr.in/${encodeURIComponent(location)}?format=j1`, {
      headers: { 'User-Agent': 'HQ-Dashboard/1.0' },
      next: { revalidate: 900 } // cache 15 min
    });

    if (!res.ok) throw new Error(`wttr.in returned ${res.status}`);
    const data = await res.json();

    const current = data.current_condition[0];
    const area    = data.nearest_area[0];
    const today   = data.weather[0];
    const tomorrow = data.weather[1];

    const city  = area.areaName[0].value;
    const state = area.region[0].value;

    // Hourly forecast for today (3 slots: morning, afternoon, evening)
    const hourly = (today.hourly || []).filter((_, i) => [2, 4, 6].includes(i)).map(h => ({
      time: formatHour(h.time),
      tempF: h.tempF,
      desc: h.weatherDesc[0].value,
      chanceRain: h.chanceofrain,
    }));

    return NextResponse.json({
      location: `${city}, ${state}`,
      zip: location,
      current: {
        tempF:       current.temp_F,
        feelsLikeF:  current.FeelsLikeF,
        humidity:    current.humidity,
        windMph:     current.windspeedMiles,
        windDir:     current.winddir16Point,
        visibility:  current.visibility,
        uvIndex:     current.uvIndex,
        desc:        current.weatherDesc[0].value,
        cloudcover:  current.cloudcover,
        pressure:    current.pressure,
      },
      today: {
        maxF:    today.maxtempF,
        minF:    today.mintempF,
        sunrise: today.astronomy[0].sunrise,
        sunset:  today.astronomy[0].sunset,
        desc:    today.hourly[4]?.weatherDesc[0]?.value || '',
        chanceRain: today.hourly[4]?.chanceofrain || '0',
        chanceSnow: today.hourly[4]?.chanceofsnow || '0',
      },
      tomorrow: tomorrow ? {
        maxF: tomorrow.maxtempF,
        minF: tomorrow.mintempF,
        desc: tomorrow.hourly[4]?.weatherDesc[0]?.value || '',
        chanceRain: tomorrow.hourly[4]?.chanceofrain || '0',
      } : null,
      hourly,
    });
  } catch (err) {
    return NextResponse.json({ error: err.message }, { status: 500 });
  }
}

function formatHour(time) {
  const h = parseInt(time) / 100;
  if (h === 0)  return '12 AM';
  if (h < 12)   return `${h} AM`;
  if (h === 12) return '12 PM';
  return `${h - 12} PM`;
}