(function () {
  "use strict";

  const {
    DAY_IN_MS,
    getDateKey,
    getDecanForDate,
    getMoonPhaseName,
    calcPlanetaryHoursForDayAndLocation
  } = window.TarotCalc;
  const nowUiHelpers = window.NowUiHelpers || {};

  if (
    typeof nowUiHelpers.findNextDecanTransition !== "function"
    || typeof nowUiHelpers.findNextMoonPhaseTransition !== "function"
    || typeof nowUiHelpers.formatCountdown !== "function"
    || typeof nowUiHelpers.getSignStartDate !== "function"
    || typeof nowUiHelpers.getDisplayTarotName !== "function"
    || typeof nowUiHelpers.setNowCardImage !== "function"
    || typeof nowUiHelpers.updateNowStats !== "function"
  ) {
    throw new Error("NowUiHelpers module must load before ui-now.js");
  }
  
  let moonCountdownCache = null;
  let decanCountdownCache = null;

  function updateNowPanel(referenceData, geo, elements, timeFormat = "minutes") {
    if (!referenceData || !geo || !elements) {
      return { dayKey: getDateKey(new Date()), skyRefreshKey: "" };
    }

    const now = new Date();
    const dayKey = getDateKey(now);

    const todayHours = calcPlanetaryHoursForDayAndLocation(now, geo);
    const yesterday = new Date(now.getTime() - DAY_IN_MS);
    const yesterdayHours = calcPlanetaryHoursForDayAndLocation(yesterday, geo);
    const tomorrow = new Date(now.getTime() + DAY_IN_MS);
    const tomorrowHours = calcPlanetaryHoursForDayAndLocation(tomorrow, geo);
    const allHours = [...yesterdayHours, ...todayHours, ...tomorrowHours].sort(
      (a, b) => a.start.getTime() - b.start.getTime()
    );
    const currentHour = allHours.find((entry) => now >= entry.start && now < entry.end);
    const currentHourSkyKey = currentHour
      ? `${currentHour.planetId}-${currentHour.start.toISOString()}`
      : "no-hour";

    if (currentHour) {
      const planet = referenceData.planets[currentHour.planetId];
      elements.nowHourEl.textContent = planet
        ? `${planet.symbol} ${planet.name}`
        : currentHour.planetId;
      if (elements.nowHourTarotEl) {
        const hourCardName = planet?.tarot?.majorArcana || "";
        const hourTrumpNumber = planet?.tarot?.number;
        elements.nowHourTarotEl.textContent = hourCardName
          ? nowUiHelpers.getDisplayTarotName(hourCardName, hourTrumpNumber)
          : "--";
      }

      const msLeft = Math.max(0, currentHour.end.getTime() - now.getTime());
      elements.nowCountdownEl.textContent = nowUiHelpers.formatCountdown(msLeft, timeFormat);

      if (elements.nowHourNextEl) {
        const nextHour = allHours.find(
          (entry) => entry.start.getTime() >= currentHour.end.getTime() - 1000
        );
        if (nextHour) {
          const nextPlanet = referenceData.planets[nextHour.planetId];
          elements.nowHourNextEl.textContent = nextPlanet
            ? `> ${nextPlanet.name}`
            : `> ${nextHour.planetId}`;
        } else {
          elements.nowHourNextEl.textContent = "> --";
        }
      }

      nowUiHelpers.setNowCardImage(
        elements.nowHourCardEl,
        planet?.tarot?.majorArcana,
        "Current planetary hour card",
        planet?.tarot?.number
      );
    } else {
      elements.nowHourEl.textContent = "--";
      elements.nowCountdownEl.textContent = "--";
      if (elements.nowHourTarotEl) {
        elements.nowHourTarotEl.textContent = "--";
      }
      if (elements.nowHourNextEl) {
        elements.nowHourNextEl.textContent = "> --";
      }
      nowUiHelpers.setNowCardImage(elements.nowHourCardEl, null, "Current planetary hour card");
    }

    const moonIllum = window.SunCalc.getMoonIllumination(now);
    const moonPhase = getMoonPhaseName(moonIllum.phase);
    const moonTarot = referenceData.planets.luna?.tarot?.majorArcana || "The High Priestess";
    elements.nowMoonEl.textContent = `${moonPhase} (${Math.round(moonIllum.fraction * 100)}%)`;
    elements.nowMoonTarotEl.textContent = nowUiHelpers.getDisplayTarotName(moonTarot, referenceData.planets.luna?.tarot?.number);
    nowUiHelpers.setNowCardImage(
      elements.nowMoonCardEl,
      moonTarot,
      "Current moon phase card",
      referenceData.planets.luna?.tarot?.number
    );

    if (!moonCountdownCache || moonCountdownCache.fromPhase !== moonPhase || now >= moonCountdownCache.changeAt) {
      moonCountdownCache = nowUiHelpers.findNextMoonPhaseTransition(now);
    }

    if (elements.nowMoonCountdownEl) {
      if (moonCountdownCache?.changeAt) {
        const remaining = moonCountdownCache.changeAt.getTime() - now.getTime();
        elements.nowMoonCountdownEl.textContent = nowUiHelpers.formatCountdown(remaining, timeFormat);
        if (elements.nowMoonNextEl) {
          elements.nowMoonNextEl.textContent = `> ${moonCountdownCache.nextPhase}`;
        }
      } else {
        elements.nowMoonCountdownEl.textContent = "--";
        if (elements.nowMoonNextEl) {
          elements.nowMoonNextEl.textContent = "> --";
        }
      }
    }

    const sunInfo = getDecanForDate(now, referenceData.signs, referenceData.decansBySign);
    const decanSkyKey = sunInfo?.sign
      ? `${sunInfo.sign.id}-${sunInfo.decan?.index || 1}`
      : "no-decan";
    if (sunInfo?.sign) {
      const signStartDate = nowUiHelpers.getSignStartDate(now, sunInfo.sign);
      const daysSinceSignStart = (now.getTime() - signStartDate.getTime()) / DAY_IN_MS;
      const signDegree = Math.min(29.9, Math.max(0, daysSinceSignStart));
      const signMajorName = nowUiHelpers.getDisplayTarotName(sunInfo.sign.tarot.majorArcana, sunInfo.sign.tarot.trumpNumber);
      elements.nowDecanEl.textContent = `${sunInfo.sign.symbol} ${sunInfo.sign.name} · ${signMajorName} (${signDegree.toFixed(1)}°)`;

      const currentDecanKey = `${sunInfo.sign.id}-${sunInfo.decan?.index || 1}`;
      if (!decanCountdownCache || decanCountdownCache.key !== currentDecanKey || now >= decanCountdownCache.changeAt) {
        decanCountdownCache = nowUiHelpers.findNextDecanTransition(now, referenceData.signs, referenceData.decansBySign);
      }

      if (sunInfo.decan) {
        const decanCardName = sunInfo.decan.tarotMinorArcana;
        elements.nowDecanTarotEl.textContent = nowUiHelpers.getDisplayTarotName(decanCardName);
        nowUiHelpers.setNowCardImage(elements.nowDecanCardEl, sunInfo.decan.tarotMinorArcana, "Current decan card");
      } else {
        const signTarotName = sunInfo.sign.tarot?.majorArcana || "--";
        elements.nowDecanTarotEl.textContent = signTarotName === "--"
          ? "--"
          : nowUiHelpers.getDisplayTarotName(signTarotName, sunInfo.sign.tarot?.trumpNumber);
        nowUiHelpers.setNowCardImage(
          elements.nowDecanCardEl,
          sunInfo.sign.tarot?.majorArcana,
          "Current decan card",
          sunInfo.sign.tarot?.trumpNumber
        );
      }

      if (elements.nowDecanCountdownEl) {
        if (decanCountdownCache?.changeAt) {
          const remaining = decanCountdownCache.changeAt.getTime() - now.getTime();
          elements.nowDecanCountdownEl.textContent = nowUiHelpers.formatCountdown(remaining, timeFormat);
          if (elements.nowDecanNextEl) {
            elements.nowDecanNextEl.textContent = `> ${nowUiHelpers.getDisplayTarotName(decanCountdownCache.nextLabel)}`;
          }
        } else {
          elements.nowDecanCountdownEl.textContent = "--";
          if (elements.nowDecanNextEl) {
            elements.nowDecanNextEl.textContent = "> --";
          }
        }
      }
    } else {
      elements.nowDecanEl.textContent = "--";
      elements.nowDecanTarotEl.textContent = "--";
      nowUiHelpers.setNowCardImage(elements.nowDecanCardEl, null, "Current decan card");
      if (elements.nowDecanCountdownEl) {
        elements.nowDecanCountdownEl.textContent = "--";
      }
      if (elements.nowDecanNextEl) {
        elements.nowDecanNextEl.textContent = "> --";
      }
    }

    nowUiHelpers.updateNowStats(referenceData, elements, now);

    return {
      dayKey,
      skyRefreshKey: `${currentHourSkyKey}|${decanSkyKey}|${moonPhase}`
    };
  }

  window.TarotNowUi = {
    updateNowPanel
  };
})();