import SwiftUI

extension StatConfig {
    final class StateModel: BaseStateModel<Provider> {
        @Published var overrideHbA1cUnit = false
        @Published var low: Decimal = 4 / 0.0555
        @Published var high: Decimal = 10 / 0.0555
        @Published var uploadStats = false
        var units: GlucoseUnits = .mmolL

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

            subscribeSetting(\.overrideHbA1cUnit, on: $overrideHbA1cUnit) { overrideHbA1cUnit = $0 }
            subscribeSetting(\.uploadStats, on: $uploadStats) { uploadStats = $0 }

            subscribeSetting(\.low, on: $low, initial: {
                let value = max(min($0, 120), 40)
                low = units == .mmolL ? value.asMmolL : value
            }, map: {
                guard units == .mmolL else { return $0 }
                return $0.asMgdL
            })

            subscribeSetting(\.high, on: $high, initial: {
                let value = max(min($0, 270), 130)
                high = units == .mmolL ? value.asMmolL : value
            }, map: {
                guard units == .mmolL else { return $0 }
                return $0.asMgdL
            })
        }
    }
}