(function () {
  const {
    DAY_IN_MS,
    toTitleCase,
    getMoonPhaseName,
    getDecanForDate,
    calcPlanetaryHoursForDayAndLocation
  } = window.TarotCalc;

  const PLANET_CALENDAR_IDS = new Set(["saturn", "jupiter", "mars", "sol", "venus", "mercury", "luna"]);
  const BACKFILL_DAYS = 4;
  const FORECAST_DAYS = 7;

  function buildWeekEvents(geo, referenceData, anchorDate) {
    const baseDate = anchorDate || new Date();
    const events = [];
    let runningId = 1;

    for (let offset = -BACKFILL_DAYS; offset <= FORECAST_DAYS; offset += 1) {
      const date = new Date(baseDate.getTime() + offset * DAY_IN_MS);
      const hours = calcPlanetaryHoursForDayAndLocation(date, geo);
      const moonIllum = window.SunCalc.getMoonIllumination(date);
      const moonPhase = getMoonPhaseName(moonIllum.phase);
      const sunInfo = getDecanForDate(date, referenceData.signs, referenceData.decansBySign);

      const moonTarot = referenceData.planets.luna?.tarot?.majorArcana || "The High Priestess";
      events.push({
        id: `moon-${offset}`,
        calendarId: "astrology",
        category: "allday",
        title: `Moon: ${moonPhase} (${Math.round(moonIllum.fraction * 100)}%) · ${moonTarot}`,
        start: new Date(date.getFullYear(), date.getMonth(), date.getDate()),
        end: new Date(date.getFullYear(), date.getMonth(), date.getDate(), 23, 59, 59),
        isReadOnly: true
      });

      if (sunInfo?.sign) {
        const rulerPlanet = referenceData.planets[sunInfo.sign.rulingPlanetId];
        const bodyParts = [
          `${sunInfo.sign.symbol} ${toTitleCase(sunInfo.sign.element)} ${toTitleCase(sunInfo.sign.modality)}`,
          rulerPlanet ? `Sign ruler: ${rulerPlanet.symbol} ${rulerPlanet.name}` : `Sign ruler: ${sunInfo.sign.rulingPlanetId}`
        ];

        if (sunInfo.decan) {
          const decanRuler = referenceData.planets[sunInfo.decan.rulerPlanetId];
          const decanText = decanRuler
            ? `Decan ${sunInfo.decan.index}: ${sunInfo.decan.tarotMinorArcana} (${decanRuler.symbol} ${decanRuler.name})`
            : `Decan ${sunInfo.decan.index}: ${sunInfo.decan.tarotMinorArcana}`;
          bodyParts.unshift(decanText);
        }

        events.push({
          id: `sun-${offset}`,
          calendarId: "astrology",
          category: "allday",
          title: `Sun in ${sunInfo.sign.name} · ${sunInfo.sign.tarot.majorArcana}`,
          body: bodyParts.join("\n"),
          start: new Date(date.getFullYear(), date.getMonth(), date.getDate()),
          end: new Date(date.getFullYear(), date.getMonth(), date.getDate(), 23, 59, 59),
          isReadOnly: true
        });
      }

      for (const hour of hours) {
        const planet = referenceData.planets[hour.planetId];
        if (!planet) continue;

        const calendarId = PLANET_CALENDAR_IDS.has(hour.planetId)
          ? `planet-${hour.planetId}`
          : "planetary";

        events.push({
          id: `ph-${runningId++}`,
          calendarId,
          category: "time",
          title: `${planet.symbol} ${planet.name} · ${planet.tarot.majorArcana}`,
          body: `${planet.weekday} current · ${hour.isDaylight ? "Day" : "Night"} hour\n${planet.magickTypes}`,
          raw: {
            planetSymbol: planet.symbol,
            planetName: planet.name,
            tarotName: planet.tarot.majorArcana
          },
          start: hour.start,
          end: hour.end,
          isReadOnly: true
        });
      }
    }

    return events;
  }

  window.TarotEventBuilder = {
    buildWeekEvents
  };
})();