workoutsplus/WorkoutsPlus/Workout/WorkoutDetail.swift

//
//  WorkoutDetailsView.swift
//  WorkoutsPlus
//
//  Created by Felix Förtsch on 10.08.24.
//

import SwiftUI
import SwiftData

struct WorkoutDetail: View {
		@Environment(\.dismiss) private var dismiss
		@Environment(\.modelContext) private var modelContext
		
		@Bindable var workout: Workout
		@State private var isPresenting = false
		
		var body: some View {
				
				Form {
						Section(header: Text("Workout Name")) {
								TextField("Workout Name", text: $workout.name)
						}
						Section(header: Text("Exercises")) {
								List {
										ForEach(workout.workoutItems
												.sorted(by: { $0.position < $1.position})) { workoutItem in
														switch workoutItem.workoutItemType {
														case .exercise:
																ExerciseListItem(workout, workoutItem)
														case .set:
																SetListItem(workout, workoutItem)
														case .workout:
																Text(workoutItem.name)
														}
												}
												.onDelete(perform: deleteExerciseFromWorkout)
												.onMove(perform: move)
								}
								.environment(\.editMode, .constant(.active)) // Always active drag mode
								AddItemButton(label: "Exercise", action: addWorkoutItemToWorkout)
						}
				}
				.navigationBarTitle("Edit \(workout.name)")
				.toolbar {
						ToolbarItem() {
								EditButton()
						}
				}
				.sheet(isPresented: $isPresenting) {
						NavigationStack {
								AddWorkoutItemToWorkout(workout: workout)
						}
						.presentationDetents([.medium, .large])
						.presentationDragIndicator(.visible)
				}
		}
		
		private func addWorkoutItemToWorkout() {
				withAnimation {
						isPresenting = true
				}
		}
		
		private func saveWorkout() {
				if modelContext.hasChanges {
						do {
								try modelContext.save()
						} catch {
								print("Failed to save workout: \(error.localizedDescription)")
						}
				}
		}
		
		private func deleteExerciseFromWorkout(offsets: IndexSet) {
				withAnimation {
						for index in offsets {
								modelContext.delete(workout.workoutItems[index])
						}
						try? modelContext.save()
				}
		}
		
		private func move(from source: IndexSet, to destination: Int) {
				workout.moveWorkoutItem(from: source, to: destination)
		}
}

#Preview {
		NavigationStack {
				WorkoutDetail(workout: Workout.sampleData)
						.modelContainer(SampleData.shared.modelContainer)
		}
}