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

import SwiftUI
import SwiftData

struct AddExerciseToWorkout: View {
		@Environment(\.modelContext) private var modelContext
		@Query(sort: \ExerciseTemplate.name) private var exerciseTemplates: [ExerciseTemplate]
		
		@Bindable var workout: Workout
		
		var body: some View {
				Group {
						if !exerciseTemplates.isEmpty {
								List {
										Section(header: Text("Excersises")) {
												ForEach(exerciseTemplates) { exerciseTemplate in
														AddExerciseToWorkoutListItem(exerciseTemplate, workout)
												}
										}
								}
						} else {
								ContentUnavailableView {
										// TODO: Add Button that allows adding an exercise
										Label("No Exercises", systemImage: ExerciseTemplate.systemImage)
								}
						}
				}
		}
}

struct AddExerciseToWorkoutListItem: View {
		@Environment(\.modelContext) private var modelContext
		
		var exerciseTemplate: ExerciseTemplate
		var workout: Workout
		
		init(_ exerciseTemplate: ExerciseTemplate, _ workout: Workout) {
				self.exerciseTemplate = exerciseTemplate
				self.workout = workout
		}
		
		var body: some View {
				Button(action: {
						workout.addExercise(from: exerciseTemplate)
				}) {
						HStack {
								Text(exerciseTemplate.name)
										.foregroundColor(.black)
								Spacer()
								Image(systemName: "plus.circle.fill")
										.foregroundColor(.green)
						}
				}
		}
}

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

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