"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";
import {
  normalizeDashboardSectionOrder,
  normalizeDashboardSectionVisibility,
  type DashboardSectionId,
} from "@/lib/dashboard-sections";

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 = normalizeDashboardSectionVisibility(useWeatherStore((state) => state.dashboardSections));
  const dashboardSectionOrder = normalizeDashboardSectionOrder(useWeatherStore((state) => state.dashboardSectionOrder));
  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;

  const renderDashboardSection = (sectionId: DashboardSectionId) => {
    if (!dashboardSections[sectionId]) return null;
    if (sectionId === "warnings") return <DashboardWarnings key={sectionId} />;
    if (sectionId === "weatherBrief")
      return (
        <WeatherBriefCard
          key={sectionId}
          latitude={forecastLatitude}
          longitude={forecastLongitude}
          region={activeRegion}
          locationName={forecastLocationName ?? selectedStation.name}
        />
      );
    if (sectionId === "forecast")
      return (
        <ForecastPanel
          key={sectionId}
          latitude={forecastLatitude}
          longitude={forecastLongitude}
          region={activeRegion}
          locationName={forecastLocationName ?? selectedStation.name}
        />
      );
    if (sectionId === "favorites") return <FavoritesSection key={sectionId} stations={stations} />;
    if (sectionId === "featuredStations") return <FeaturedStationsSection key={sectionId} stations={stations} />;
    return null;
  };

  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}
      />
      {dashboardSectionOrder.map(renderDashboardSection)}
    </div>
  );
}