//
//  MoodLogger.swift
//  Feels
//
//  Centralized mood logging service that handles all side effects
//

import Foundation
import WidgetKit

/// Centralized service for logging moods with all associated side effects.
/// All mood entry points should use this service to ensure consistent behavior.
@MainActor
final class MoodLogger {
    static let shared = MoodLogger()

    private init() {}

    /// Log a mood entry with all associated side effects.
    /// This is the single source of truth for mood logging in the app.
    ///
    /// - Parameters:
    ///   - mood: The mood to log
    ///   - date: The date for the mood entry
    ///   - entryType: The source of the mood entry (header, widget, siri, etc.)
    ///   - syncHealthKit: Whether to sync to HealthKit (default true, but widget can't access HealthKit)
    ///   - updateTips: Whether to update TipKit parameters (default true, but widget can't access TipKit)
    func logMood(
        _ mood: Mood,
        for date: Date,
        entryType: EntryType,
        syncHealthKit: Bool = true,
        updateTips: Bool = true
    ) {
        // 1. Add mood entry to data store
        DataController.shared.add(mood: mood, forDate: date, entryType: entryType)

        // Skip side effects for placeholder/missing moods
        guard mood != .missing && mood != .placeholder else { return }

        // 2. Sync to HealthKit if enabled and requested
        if syncHealthKit {
            let healthKitEnabled = GroupUserDefaults.groupDefaults.bool(forKey: UserDefaultsStore.Keys.healthKitEnabled.rawValue)
            if healthKitEnabled {
                Task {
                    try? await HealthKitManager.shared.saveMood(mood, for: date)
                }
            }
        }

        // 3. Calculate current streak for Live Activity and TipKit
        let streak = calculateCurrentStreak()

        // 4. Update Live Activity
        LiveActivityManager.shared.updateActivity(streak: streak, mood: mood)
        LiveActivityScheduler.shared.scheduleForNextDay()

        // 5. Update TipKit parameters if requested
        if updateTips {
            TipsManager.shared.onMoodLogged()
            TipsManager.shared.updateStreak(streak)
        }

        // 6. Request app review at moments of delight
        ReviewRequestManager.shared.onMoodLogged(streak: streak)

        // 7. Reload widgets
        WidgetCenter.shared.reloadAllTimelines()

        // 8. Notify watch to refresh complications
        WatchConnectivityManager.shared.notifyWatchToReload()
    }

    /// Calculate the current mood streak
    private func calculateCurrentStreak() -> Int {
        var streak = 0
        var checkDate = ShowBasedOnVoteLogics.getCurrentVotingDate(onboardingData: UserDefaultsStore.getOnboarding())

        while true {
            let dayStart = Calendar.current.startOfDay(for: checkDate)
            let dayEnd = Calendar.current.date(bySettingHour: 23, minute: 59, second: 59, of: dayStart)!

            let entry = DataController.shared.getData(startDate: dayStart, endDate: dayEnd, includedDays: []).first

            if let entry = entry, entry.mood != .missing && entry.mood != .placeholder {
                streak += 1
                checkDate = Calendar.current.date(byAdding: .day, value: -1, to: checkDate)!
            } else {
                break
            }
        }

        return streak
    }
}