import SwiftUI

extension NotificationsConfig {
    final class StateModel: BaseStateModel<Provider> {
        @Published var glucoseBadge = false
        @Published var tooOldGlucose = false
        @Published var glucoseNotificationsAlways = false
        @Published var useAlarmSound = false
        @Published var addSourceInfoToGlucoseNotifications = false
        @Published var lowGlucose: Decimal = 0
        @Published var highGlucose: Decimal = 0
        @Published var carbsRequiredThreshold: Decimal = 0
        var units: GlucoseUnits = .mmolL

        override func subscribe() {
            let units = settingsManager.settings.units
            self.units = units

            subscribeSetting(\.glucoseBadge, on: $glucoseBadge) { glucoseBadge = $0 }
            subscribeSetting(\.tooOldGlucose, on: $tooOldGlucose) { tooOldGlucose = $0 }
            subscribeSetting(\.glucoseNotificationsAlways, on: $glucoseNotificationsAlways) { glucoseNotificationsAlways = $0 }
            subscribeSetting(\.useAlarmSound, on: $useAlarmSound) { useAlarmSound = $0 }
            subscribeSetting(\.addSourceInfoToGlucoseNotifications, on: $addSourceInfoToGlucoseNotifications) {
                addSourceInfoToGlucoseNotifications = $0 }

            subscribeSetting(\.lowGlucose, on: $lowGlucose, initial: {
                let value = max(min($0, 400), 40)
                lowGlucose = units == .mmolL ? value.asMmolL : value
            }, map: {
                guard units == .mmolL else { return $0 }
                return $0.asMgdL
            })

            subscribeSetting(\.highGlucose, on: $highGlucose, initial: {
                let value = max(min($0, 400), 40)
                highGlucose = units == .mmolL ? value.asMmolL : value
            }, map: {
                guard units == .mmolL else { return $0 }
                return $0.asMgdL
            })

            subscribeSetting(
                \.carbsRequiredThreshold,
                on: $carbsRequiredThreshold
            ) { carbsRequiredThreshold = $0 }
        }
    }
}