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import Foundation
class SolsticeData {
static let shared = SolsticeData()
private let events: [SolsticeEvent]
private init() {
// Hardcoded solstice/equinox events for 2025-2030 (all in UTC)
var allEvents: [SolsticeEvent] = []
// 2025
allEvents.append(SolsticeEvent(name: "Spring Equinox 2025", date: SolsticeData.dateFromUTC(year: 2025, month: 3, day: 20, hour: 9, minute: 1), season: .spring))
allEvents.append(SolsticeEvent(name: "Summer Solstice 2025", date: SolsticeData.dateFromUTC(year: 2025, month: 6, day: 20, hour: 14, minute: 42), season: .summer))
allEvents.append(SolsticeEvent(name: "Autumn Equinox 2025", date: SolsticeData.dateFromUTC(year: 2025, month: 9, day: 22, hour: 18, minute: 20), season: .autumn))
allEvents.append(SolsticeEvent(name: "Winter Solstice 2025", date: SolsticeData.dateFromUTC(year: 2025, month: 12, day: 21, hour: 15, minute: 3), season: .winter))
// 2026
allEvents.append(SolsticeEvent(name: "Spring Equinox 2026", date: SolsticeData.dateFromUTC(year: 2026, month: 3, day: 20, hour: 14, minute: 46), season: .spring))
allEvents.append(SolsticeEvent(name: "Summer Solstice 2026", date: SolsticeData.dateFromUTC(year: 2026, month: 6, day: 21, hour: 8, minute: 25), season: .summer))
allEvents.append(SolsticeEvent(name: "Autumn Equinox 2026", date: SolsticeData.dateFromUTC(year: 2026, month: 9, day: 23, hour: 0, minute: 6), season: .autumn))
allEvents.append(SolsticeEvent(name: "Winter Solstice 2026", date: SolsticeData.dateFromUTC(year: 2026, month: 12, day: 21, hour: 20, minute: 50), season: .winter))
// 2027
allEvents.append(SolsticeEvent(name: "Spring Equinox 2027", date: SolsticeData.dateFromUTC(year: 2027, month: 3, day: 20, hour: 20, minute: 25), season: .spring))
allEvents.append(SolsticeEvent(name: "Summer Solstice 2027", date: SolsticeData.dateFromUTC(year: 2027, month: 6, day: 21, hour: 14, minute: 11), season: .summer))
allEvents.append(SolsticeEvent(name: "Autumn Equinox 2027", date: SolsticeData.dateFromUTC(year: 2027, month: 9, day: 23, hour: 6, minute: 2), season: .autumn))
allEvents.append(SolsticeEvent(name: "Winter Solstice 2027", date: SolsticeData.dateFromUTC(year: 2027, month: 12, day: 22, hour: 2, minute: 43), season: .winter))
// 2028
allEvents.append(SolsticeEvent(name: "Spring Equinox 2028", date: SolsticeData.dateFromUTC(year: 2028, month: 3, day: 20, hour: 2, minute: 17), season: .spring))
allEvents.append(SolsticeEvent(name: "Summer Solstice 2028", date: SolsticeData.dateFromUTC(year: 2028, month: 6, day: 20, hour: 20, minute: 2), season: .summer))
allEvents.append(SolsticeEvent(name: "Autumn Equinox 2028", date: SolsticeData.dateFromUTC(year: 2028, month: 9, day: 22, hour: 11, minute: 45), season: .autumn))
allEvents.append(SolsticeEvent(name: "Winter Solstice 2028", date: SolsticeData.dateFromUTC(year: 2028, month: 12, day: 21, hour: 8, minute: 20), season: .winter))
// 2029
allEvents.append(SolsticeEvent(name: "Spring Equinox 2029", date: SolsticeData.dateFromUTC(year: 2029, month: 3, day: 20, hour: 8, minute: 1), season: .spring))
allEvents.append(SolsticeEvent(name: "Summer Solstice 2029", date: SolsticeData.dateFromUTC(year: 2029, month: 6, day: 21, hour: 1, minute: 48), season: .summer))
allEvents.append(SolsticeEvent(name: "Autumn Equinox 2029", date: SolsticeData.dateFromUTC(year: 2029, month: 9, day: 22, hour: 17, minute: 37), season: .autumn))
allEvents.append(SolsticeEvent(name: "Winter Solstice 2029", date: SolsticeData.dateFromUTC(year: 2029, month: 12, day: 21, hour: 14, minute: 14), season: .winter))
// 2030
allEvents.append(SolsticeEvent(name: "Spring Equinox 2030", date: SolsticeData.dateFromUTC(year: 2030, month: 3, day: 20, hour: 13, minute: 51), season: .spring))
allEvents.append(SolsticeEvent(name: "Summer Solstice 2030", date: SolsticeData.dateFromUTC(year: 2030, month: 6, day: 21, hour: 7, minute: 31), season: .summer))
allEvents.append(SolsticeEvent(name: "Autumn Equinox 2030", date: SolsticeData.dateFromUTC(year: 2030, month: 9, day: 22, hour: 23, minute: 27), season: .autumn))
allEvents.append(SolsticeEvent(name: "Winter Solstice 2030", date: SolsticeData.dateFromUTC(year: 2030, month: 12, day: 21, hour: 20, minute: 9), season: .winter))
// Sort events by date
self.events = allEvents.sorted { $0.date < $1.date }
}
/// Helper function to create UTC dates (static to be usable during init)
private static func dateFromUTC(year: Int, month: Int, day: Int, hour: Int, minute: Int) -> Date {
var components = DateComponents()
components.year = year
components.month = month
components.day = day
components.hour = hour
components.minute = minute
components.second = 0
components.timeZone = TimeZone(abbreviation: "UTC")
return Calendar(identifier: .gregorian).date(from: components) ?? Date()
}
/// Returns the next upcoming solstice/equinox event
func nextEvent() -> SolsticeEvent? {
let now = Date()
return events.first { $0.date > now }
}
/// Returns the next N upcoming events
func upcomingEvents(count: Int) -> [SolsticeEvent] {
let now = Date()
let futureEvents = events.filter { $0.date > now }
return Array(futureEvents.prefix(count))
}
/// Returns the progress to the next event as (elapsed days, total days)
func progressToNextEvent() -> (elapsed: Int, total: Int)? {
guard let nextEvent = nextEvent() else {
return nil
}
let now = Date()
let today = Calendar.current.startOfDay(for: now)
let eventDay = Calendar.current.startOfDay(for: nextEvent.date)
// Find the previous event to calculate total days
guard let previousEventIndex = events.firstIndex(where: { $0.date > now }) else {
return nil
}
let previousEvent: Date
if previousEventIndex > 0 {
previousEvent = events[previousEventIndex - 1].date
} else {
// If this is the first event, we need to handle this case
// Use the event itself minus some arbitrary period (not applicable for first event)
return nil
}
let previousEventDay = Calendar.current.startOfDay(for: previousEvent)
// Calculate elapsed and total days
let elapsedComponents = Calendar.current.dateComponents([.day], from: previousEventDay, to: today)
let totalComponents = Calendar.current.dateComponents([.day], from: previousEventDay, to: eventDay)
let elapsed = max(0, elapsedComponents.day ?? 0)
let total = max(1, totalComponents.day ?? 1)
return (elapsed: elapsed, total: total)
}
}
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