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+//
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+// CarbRatioStepView.swift
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+// Trio
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+//
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+// Created by Marvin Polscheit on 19.03.25.
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+//
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+import SwiftUI
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+
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+/// Carb ratio step view for setting insulin-to-carb ratio.
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+struct CarbRatioStepView: View {
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+ @State var onboardingData: OnboardingData
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+ @State private var showTimeSelector = false
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+ @State private var selectedRatioIndex: Int?
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+
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+ private var formatter: NumberFormatter {
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+ let formatter = NumberFormatter()
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+ formatter.numberStyle = .decimal
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+ formatter.maximumFractionDigits = 1
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+ return formatter
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+ }
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+
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+ private var dateFormatter: DateFormatter {
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+ let formatter = DateFormatter()
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+ formatter.timeZone = TimeZone(secondsFromGMT: 0)
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+ formatter.timeStyle = .short
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+ return formatter
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+ }
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+
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+ var body: some View {
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+ VStack(alignment: .leading, spacing: 20) {
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+ Text("Your carb ratio tells how many grams of carbohydrates one unit of insulin will cover.")
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+ .font(.subheadline)
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+ .foregroundColor(.secondary)
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+
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+ // Carb ratios list
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+ VStack(alignment: .leading, spacing: 10) {
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+ Text("Carb Ratios")
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+ .font(.headline)
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+
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+ if onboardingData.items.isEmpty {
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+ // Add default entry if no items exist
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+ Button("Add Initial Carb Ratio") {
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+ onboardingData.addCarbRatio()
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+ }
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+ .foregroundColor(.orange)
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+ .padding(.vertical, 8)
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+ } else {
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+ ForEach(Array(onboardingData.items.enumerated()), id: \.element.id) { index, item in
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+ HStack {
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+ // Time display
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+ Text(
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+ dateFormatter
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+ .string(from: Date(timeIntervalSince1970: onboardingData.timeValues[item.timeIndex]))
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+ )
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+ .frame(width: 80, alignment: .leading)
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+
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+ // Ratio slider
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+ Slider(
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+ value: Binding(
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+ get: { Double(truncating: onboardingData.rateValues[item.rateIndex] as NSNumber) },
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+ set: { newValue in
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+ // Find closest match in rateValues array
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+ let newIndex = onboardingData.rateValues
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+ .firstIndex { abs(Double($0) - newValue) < 0.05 } ?? item.rateIndex
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+ onboardingData.items[index].rateIndex = newIndex
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+ }
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+ ),
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+ in: Double(truncating: onboardingData.rateValues.first! as NSNumber) ...
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+ Double(truncating: onboardingData.rateValues.last! as NSNumber),
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+ step: 0.5
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+ )
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+ .accentColor(.orange)
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+
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+ // Display the current value
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+ Text("\(formatter.string(from: onboardingData.rateValues[item.rateIndex] as NSNumber) ?? "--") g/U")
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+ .frame(width: 70, alignment: .trailing)
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+
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+ // Delete button (not for the first entry at 00:00)
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+ if index > 0 {
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+ Button(action: {
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+ onboardingData.items.remove(at: index)
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+ }) {
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+ Image(systemName: "trash")
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+ .foregroundColor(.red)
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+ }
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+ }
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+ }
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+ .padding(.vertical, 8)
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+ .background(Color.orange.opacity(0.05))
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+ .cornerRadius(8)
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+ }
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+ }
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+ }
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+
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+ // Add new carb ratio button
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+ if !onboardingData.items.isEmpty && onboardingData.items.count < 24 {
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+ Button(action: {
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+ showTimeSelector = true
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+ }) {
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+ HStack {
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+ Image(systemName: "plus.circle.fill")
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+ Text("Add Carb Ratio")
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+ }
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+ .foregroundColor(.orange)
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+ .padding(.vertical, 8)
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+ }
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+ }
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+
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+ Divider()
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+
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+ // Example calculation based on first carb ratio
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+ if !onboardingData.items.isEmpty {
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+ VStack(alignment: .leading, spacing: 8) {
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+ Text("Example Calculation")
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+ .font(.headline)
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+ .padding(.top)
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+
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+ VStack(alignment: .leading, spacing: 4) {
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+ Text("For 45g of carbs, you would need:")
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+ .font(.subheadline)
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+
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+ let insulinNeeded = 45 /
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+ Double(truncating: onboardingData.rateValues[onboardingData.items.first!.rateIndex] as NSNumber)
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+ Text(
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+ "45g ÷ \(formatter.string(from: onboardingData.rateValues[onboardingData.items.first!.rateIndex] as NSNumber) ?? "--") = \(String(format: "%.1f", insulinNeeded)) units of insulin"
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+ )
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+ .font(.system(.body, design: .monospaced))
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+ .foregroundColor(.orange)
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+ .padding(.vertical, 8)
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+ .padding(.horizontal, 12)
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+ .background(Color.orange.opacity(0.1))
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+ .cornerRadius(8)
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+ }
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+ .padding(.vertical, 4)
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+ }
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+
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+ // Information about the carb ratio
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+ VStack(alignment: .leading, spacing: 8) {
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+ Text("What This Means")
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+ .font(.headline)
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+ .padding(.top, 8)
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+
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+ VStack(alignment: .leading, spacing: 4) {
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+ Text("• A ratio of 10 g/U means 1 unit of insulin covers 10g of carbs")
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+ Text("• A lower number means you need more insulin for the same amount of carbs")
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+ Text("• A higher number means you need less insulin for the same amount of carbs")
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+ Text("• Different times of day may require different ratios")
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+ }
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+ .font(.caption)
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+ .foregroundColor(.secondary)
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+ }
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+ }
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+
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+ // Visualization of carb ratio if we have ratios defined
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+ if !onboardingData.items.isEmpty {
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+ VStack(alignment: .leading, spacing: 8) {
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+ Text("Visual Reference")
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+ .font(.headline)
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+ .padding(.top)
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+
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+ HStack(spacing: 20) {
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+ VStack {
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+ Image(systemName: "fork.knife")
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+ .font(.system(size: 40))
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+ .foregroundColor(.orange)
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+ Text(
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+ "\(formatter.string(from: onboardingData.rateValues[onboardingData.items.first!.rateIndex] as NSNumber) ?? "--")g"
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+ )
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+ .font(.headline)
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+ Text("Carbs")
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+ .font(.caption)
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+ }
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+
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+ Text("=")
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+ .font(.title)
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+
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+ VStack {
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+ Image(systemName: "drop.fill")
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+ .font(.system(size: 40))
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+ .foregroundColor(.blue)
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+ Text("1U")
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+ .font(.headline)
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+ Text("Insulin")
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+ .font(.caption)
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+ }
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+ }
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+ .frame(maxWidth: .infinity)
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+ .padding()
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+ .background(Color.orange.opacity(0.1))
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+ .cornerRadius(12)
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+ }
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+ }
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+ }
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+ .padding()
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+ .actionSheet(isPresented: $showTimeSelector) {
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+ var buttons: [ActionSheet.Button] = []
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+
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+ // Find available time slots in 1-hour increments
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+ for hour in 0 ..< 24 {
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+ let hourInMinutes = hour * 60
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+ // Calculate timeIndex for this hour
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+ let timeIndex = onboardingData.timeValues.firstIndex { abs($0 - Double(hourInMinutes * 60)) < 10 } ?? 0
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+
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+ // Check if this hour is already in the profile
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+ if !onboardingData.items.contains(where: { $0.timeIndex == timeIndex }) {
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+ buttons.append(.default(Text("\(String(format: "%02d:00", hour))")) {
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+ // Get the current ratio from the last item
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+ let rateIndex = onboardingData.items.last?.rateIndex ?? 0
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+ // Create new item with the specified time
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+ let newItem = CarbRatioEditor.Item(rateIndex: rateIndex, timeIndex: timeIndex)
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+ // Add the new item and sort the list
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+ onboardingData.items.append(newItem)
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+ onboardingData.items.sort(by: { $0.timeIndex < $1.timeIndex })
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+ })
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+ }
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+ }
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+
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+ buttons.append(.cancel())
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+
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+ return ActionSheet(
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+ title: Text("Select Start Time"),
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+ message: Text("Choose when this carb ratio should start"),
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+ buttons: buttons
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+ )
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+ }
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+ }
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+}
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polscm32