"use client";

import { DEFAULT_STATION_NAME } from "@/lib/constants";
import { useWeatherStore } from "@/lib/store";
import { useWeatherStations } from "@/hooks/use-weather-stations";
import { WeatherHero } from "@/components/weather/weather-hero";
import { FavoritesSection } from "@/components/weather/favorites-section";
import { LocationSearch } from "@/components/weather/location-search";
import { FeaturedStationsSection } from "@/components/weather/featured-stations-section";
import { PageLoadingSkeleton } from "@/components/states/loading-skeleton";
import { ErrorState } from "@/components/states/error-state";
import { useI18n } from "@/lib/i18n";
import { useMeteoStationPositions } from "@/hooks/use-meteo-stations";
import { useCurrentWeather } from "@/hooks/use-current-weather";
import { useForecast } from "@/hooks/use-forecast";
import { ForecastPanel } from "@/components/forecast/forecast-panel";
import { getUpcomingHourlyForecast } from "@/lib/forecast-utils";
import { locateSynopStations } from "@/lib/location-utils";
import { DashboardWarnings } from "@/components/warnings/dashboard-warnings";
import { WeatherBriefCard } from "@/components/dashboard/weather-brief-card";
import type { SynopStation } from "@/types/imgw";

export function DashboardPage() {
  const { t } = useI18n();
  const { data: stations, isPending, isError, refetch } = useWeatherStations();
  const { data: positions = [] } = useMeteoStationPositions();
  const selectedStationId = useWeatherStore((state) => state.selectedStationId);
  const selectedLocation = useWeatherStore((state) => state.selectedLocation);
  const dashboardSections = useWeatherStore((state) => state.dashboardSections);
  const selectedStation = stations?.find((station) => station.id === selectedStationId)
    ?? stations?.find((station) => station.name === DEFAULT_STATION_NAME)
    ?? stations?.[0];
  const activeLocation = selectedLocation;
  const activeRegion = activeLocation?.region ?? "PL";
  const stationPosition = selectedStation
    ? locateSynopStations(stations ?? [], positions).find((station) => station.id === selectedStation.id)
    : null;
  const hasActiveLocationCoordinates = Number.isFinite(activeLocation?.latitude) && Number.isFinite(activeLocation?.longitude);
  const forecastLatitude = hasActiveLocationCoordinates ? activeLocation?.latitude : stationPosition?.latitude;
  const forecastLongitude = hasActiveLocationCoordinates ? activeLocation?.longitude : stationPosition?.longitude;
  const forecastLocationName = hasActiveLocationCoordinates ? activeLocation?.name ?? selectedStation?.name : selectedStation?.name;
  const { data: currentWeather, isPending: isCurrentWeatherPending } = useCurrentWeather(forecastLatitude, forecastLongitude, activeRegion);
  const { data: forecast } = useForecast(forecastLatitude, forecastLongitude, activeRegion);
  const currentForecastWeatherCode = forecast ? getUpcomingHourlyForecast(forecast.hourly, 1)[0]?.weatherCode ?? null : null;
  const isCurrentWeatherLoading = Number.isFinite(forecastLatitude) && Number.isFinite(forecastLongitude) && isCurrentWeatherPending;
  if (isPending) return <PageLoadingSkeleton />;
  if (isError || !stations?.length || !selectedStation) return <ErrorState onRetry={() => refetch()} description={t("dashboard.error")} />;

  const heroStation: SynopStation = activeLocation?.region === "GLOBAL" ? {
    id: `global:${activeLocation.latitude},${activeLocation.longitude}`,
    name: activeLocation.name,
    measuredAt: null,
    temperature: null,
    windSpeed: null,
    windDirection: null,
    humidity: null,
    rainfall: null,
    pressure: null,
  } : selectedStation;

  return (
    <div className="space-y-10">
      <LocationSearch stations={stations} positions={positions} />
      <WeatherHero station={heroStation} currentWeather={currentWeather} currentWeatherLoading={isCurrentWeatherLoading} currentForecastWeatherCode={currentForecastWeatherCode} locationName={activeLocation?.name} distanceKm={activeLocation?.distanceKm} />
      <DashboardWarnings />
      {dashboardSections.weatherBrief && <WeatherBriefCard latitude={forecastLatitude} longitude={forecastLongitude} region={activeRegion} locationName={forecastLocationName ?? selectedStation.name} />}
      <ForecastPanel latitude={forecastLatitude} longitude={forecastLongitude} region={activeRegion} locationName={forecastLocationName ?? selectedStation.name} />
      <FavoritesSection stations={stations} />
      {dashboardSections.featuredStations && <FeaturedStationsSection stations={stations} />}
    </div>
  );
}