//
//  AddExerciseToWorkout.swift
//  WorkoutsPlus
//
//  Created by Felix Förtsch on 22.08.24.
//

import SwiftUI
import SwiftData

struct WorkoutItemLibrarySheet: View {
		@Environment(\.modelContext) private var modelContext
		@Query(sort: \Exercise.name) private var exercises: [Exercise]
		
		@State var workout: Workout
		// TODO: Add (i) Button that allows editing an exercise (maybe requires NavigationStack?)
		
		// TODO: Pass in some context? So that when we come from a Set and add a Set, it's treed. Or when we come from a Set and add an Exercise, we put it into it's child
		var body: some View {
				Group {
						List {
//								Section(header: Text("Utilities")) {
//										AddItemButton(label: "Set") {
//												addWorkoutItemtoWorkout(WorkoutItem(set: [
//														WorkoutItem(Exercise("Set item 1")),
//														WorkoutItem(Exercise("Set item 2"))
//												]))
//										}
//										AddItemButton(label: "Rest") {
//												addWorkoutItemtoWorkout(WorkoutItem(rest: 45))
//										}
//								}
								Section(header: Text("Excersises")) {
										if !exercises.isEmpty {
												ForEach(exercises) { exercise in
														AddItemButton(label: exercise.name) {
																let workoutItem = WorkoutItem(exercise)
																addWorkoutItemtoWorkout(workoutItem)
														}
												}
										} else {
												ContentUnavailableView {
														// TODO: Add Button that allows adding an exercise
														Label("No Exercises", systemImage: Exercise.systemImage)
												}
										}
								}
						}
				}
				.presentationDetents([.medium, .large])
				.presentationDragIndicator(.visible)
		}
		
		private func addWorkoutItemtoWorkout(_ workoutItem: WorkoutItem) {
				workout.add(workoutItem: workoutItem)
				// TODO: Handle saving in a way the user knows when it's saved
				//				modelContext.save()
		}
}

#Preview("With Sample Data") {
		WorkoutItemLibrarySheet(workout: Workout.sampleData.first!)
				.modelContainer(SampleData.shared.modelContainer)
}

#Preview("Empty Database") {
		WorkoutItemLibrarySheet(workout: Workout.sampleData.first!)
				.modelContainer(for: Exercise.self, inMemory: true)
}