import { formatClock } from "@/lib/display";
import { pixelLabel } from "@/lib/styles";
import type { ProviderId, WeatherReport } from "@/lib/weather/types";

const LINK = "text-gold hover:text-gold-bright underline decoration-gold-dim underline-offset-2";

function ProviderCredit({ provider }: { provider: ProviderId }) {
  switch (provider) {
    case "openweather":
      return (
        <>
          Weather data provided by{" "}
          <a href="https://openweathermap.org/" target="_blank" rel="noopener" className={LINK}>
            OpenWeather
          </a>{" "}
          (
          <a href="https://creativecommons.org/licenses/by-sa/4.0/" target="_blank" rel="noopener" className={LINK}>
            CC BY-SA 4.0
          </a>{" "}
          /{" "}
          <a href="https://opendatacommons.org/licenses/odbl/" target="_blank" rel="noopener" className={LINK}>
            ODbL
          </a>
          )
        </>
      );
    case "openmeteo":
      return (
        <>
          Weather data by{" "}
          <a href="https://open-meteo.com/" target="_blank" rel="noopener" className={LINK}>
            Open-Meteo.com
          </a>{" "}
          (
          <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank" rel="noopener" className={LINK}>
            CC BY 4.0
          </a>
          )
        </>
      );
    case "weatherapi":
      return (
        <>
          Powered by{" "}
          <a href="https://www.weatherapi.com/" title="Free Weather API" target="_blank" rel="noopener" className={LINK}>
            WeatherAPI.com
          </a>
        </>
      );
    case "tomorrow":
      return (
        <>
          Powered by{" "}
          <a href="https://www.tomorrow.io/" target="_blank" rel="noopener" className={LINK}>
            Tomorrow.io
          </a>
        </>
      );
  }
}

/**
 * Visible attribution, safety disclaimer, and privacy disclosure required
 * across the weather, geocoding, air-quality, alert, and basemap providers.
 */
export function SiteFooter({
  report,
  activeProvider,
  hasOpenWeather,
}: {
  report: WeatherReport | null;
  activeProvider: ProviderId;
  hasOpenWeather: boolean;
}) {
  const creditedProvider = report?.provider ?? activeProvider;
  const camsYear = report ? new Date(report.fetchedAt).getUTCFullYear() : null;

  return (
    <footer className="mt-4 flex flex-col gap-2.5 border-t border-gold-dim/50 pt-4 text-xs leading-relaxed text-stone">
      {/* Live visible attribution line for active data on screen */}
      <div className="flex flex-wrap items-baseline justify-between gap-x-4 gap-y-1">
        <p>
          <ProviderCredit provider={creditedProvider} />
          {report && <>, updated {formatClock(report.fetchedAt, null)}</>}.
          {report?.airQuality && (
            <>
              {" "}Air quality by{" "}
              <a href="https://open-meteo.com/" target="_blank" rel="noopener" className={LINK}>
                Open-Meteo.com
              </a>{" "}
              — contains modified{" "}
              <a href="https://atmosphere.copernicus.eu/" target="_blank" rel="noopener" className={LINK}>
                Copernicus Atmosphere Monitoring Service (CAMS)
              </a>{" "}
              information ({camsYear}).
            </>
          )}
        </p>

        <p className="text-[11px]">
          {hasOpenWeather ? (
            <>
              Places via{" "}
              <a href="https://openweathermap.org/" target="_blank" rel="noopener" className={LINK}>
                OpenWeather
              </a>
            </>
          ) : (
            <>
              Location data based on{" "}
              <a href="https://www.geonames.org/" target="_blank" rel="noopener" className={LINK}>
                GeoNames
              </a>{" "}
              (
              <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank" rel="noopener" className={LINK}>
                CC BY 4.0
              </a>
              )
            </>
          )}
        </p>
      </div>

      {/* Expandable legal, safety & privacy notice + author signature */}
      <div className="flex flex-col gap-2.5">
        <div className="flex flex-wrap items-center justify-between gap-x-4 gap-y-2">
          <details className="group w-full">
            <summary className={`inline-flex cursor-pointer list-none items-center gap-1.5 ${pixelLabel} hover:text-gold-bright`}>
              <span className="inline-block transition-transform group-open:rotate-90" aria-hidden="true">
                ›
              </span>
              Data licenses, safety disclaimer &amp; privacy
            </summary>

            <div className="mt-2.5 grid gap-3 border border-gold-dim/50 bg-panel/70 p-4 text-xs leading-relaxed sm:grid-cols-3">
              <div className="flex flex-col gap-1">
                <p className="font-pixel text-[0.68rem] text-gold-bright">Safety disclaimer</p>
                <p>
                  Weather forecasts, radar imagery, and alert summaries are provided &ldquo;as is&rdquo; without warranty for general
                  informational use. Do not rely solely on this site for life-safety or emergency decisions; monitor{" "}
                  <a href="https://www.weather.gov/" target="_blank" rel="noopener" className={LINK}>
                    weather.gov
                  </a>{" "}
                  or your national meteorological service. Not affiliated with or endorsed by NOAA/NWS.
                </p>
              </div>

              <div className="flex flex-col gap-1">
                <p className="font-pixel text-[0.68rem] text-gold-bright">Map &amp; radar credits</p>
                <p>
                  Basemap &copy;{" "}
                  <a href="https://www.openstreetmap.org/copyright" target="_blank" rel="noopener" className={LINK}>
                    OpenStreetMap
                  </a>{" "}
                  contributors, &copy;{" "}
                  <a href="https://carto.com/attributions" target="_blank" rel="noopener" className={LINK}>
                    CARTO
                  </a>
                  . Global radar by{" "}
                  <a href="https://www.rainviewer.com/" target="_blank" rel="noopener" className={LINK}>
                    RainViewer
                  </a>
                  ; US NEXRAD composite via{" "}
                  <a href="https://mesonet.agron.iastate.edu/" target="_blank" rel="noopener" className={LINK}>
                    Iowa Environmental Mesonet
                  </a>{" "}
                  (Iowa State University). Raw weather metrics are unit-converted and normalized for display.
                </p>
              </div>

              <div className="flex flex-col gap-1">
                <p className="font-pixel text-[0.68rem] text-gold-bright">Privacy</p>
                <p>
                  Wayfarer uses no accounts, ad trackers, or analytics cookies. Unit preferences and recent waypoints stay in your
                  browser&rsquo;s <code className="font-pixel text-[0.65rem] text-ink">localStorage</code>. Coordinates shared via
                  &ldquo;Use my location&rdquo; are used only in real time to fetch forecast and map data and are never stored on
                  our server.
                </p>
              </div>
            </div>
          </details>
        </div>

        <div className="flex flex-wrap items-center justify-between gap-x-4 gap-y-1 border-t border-gold-dim/35 pt-2.5 text-xs">
          <p className="flex items-baseline gap-2">
            <span className="font-display text-xs font-bold tracking-[0.22em] text-gold uppercase">Wayfarer</span>
            <a
              href="https://caydens.dev"
              target="_blank"
              rel="noopener"
              className="group/author font-pixel text-[0.68rem] tracking-[0.05em] text-stone transition-colors hover:text-gold-bright"
            >
              by{" "}
              <span className="text-gold underline decoration-gold-dim underline-offset-2 transition-colors group-hover/author:text-gold-bright">
                Cayden Codes
              </span>
            </a>
          </p>
          <a
            href="https://caydens.dev"
            target="_blank"
            rel="noopener"
            className="font-pixel text-[0.68rem] text-stone transition-colors hover:text-gold-bright"
          >
            caydens.dev ↗
          </a>
        </div>
      </div>
    </footer>
  );
}