//
//  AddExercise.swift
//  WorkoutsPlus
//
//  Created by Felix Förtsch on 21.09.24.
//

import SwiftUI
import SwiftData

struct ExerciseEditor: View {
		@Environment(\.modelContext) private var modelContext
		@Environment(\.dismiss) private var dismiss
		var isPresentedAsSheet: Bool = false
		
		@State var exercise: Exercise?
		
		@State private var name: String = ""
		@State private var description: String = ""
		
		@State private var metric: ExerciseMetric = .reps
		@State private var reps: String = ""
		@State private var duration: String = ""
		@State private var distance: String = ""
		
		@State private var isPartOfProgression: Bool = false
		
		@State private var exerciseValue = ExerciseValue()
		@State private var isValueKeyboardPresented = false
		
		var body: some View {
				NavigationStack {
						VStack {
								ScrollViewReader { proxy in
										VStack {
												Form {
														Section(footer: Text("The exercise description is optional.")) {
																TextField("Exercise Name", text: $name)
																// TODO: Add Autocomplete
																TextField("Description", text: $description)
														}
														Section {
																Button(action: {
																		isValueKeyboardPresented.toggle()
																		proxy.scrollTo("valueButton", anchor: .center)
																}, label: {
																		Text("\(exerciseValue.value) \(exerciseValue.unit.rawValue)")
																})
																.id("valueButton") // Assign a unique ID to the button
														}
														Section(footer: Text("Feature coming soon.")) {
																Toggle(isOn: $isPartOfProgression) {
																		Text("Exercise is Part of a Progression")
																				.foregroundStyle(.gray)
																}
																.disabled(true)
														}
												}
												.navigationTitle("Edit")
												.toolbar {
														if isPresentedAsSheet {
																ToolbarItem(placement: .cancellationAction) {
																		Button("Cancel", role: .cancel) {
																				dismiss()
																		}
																}
														}
														ToolbarItem(placement: .confirmationAction) {
																Button("Save") {
																		withAnimation {
																				save()
																				dismiss()
																		}
																}
														}
												}
										}
										.onAppear {
												if let exercise {
														self.name = exercise.name
														self.description = exercise.exerciseDescription
														
														self.metric = exercise.metric
														self.reps = exercise.suggestedReps
														self.duration = exercise.suggestedDuration
														self.distance = exercise.suggestedDistance
														
														self.isPartOfProgression = exercise.isPartOfProgression
												}
										}
								}
								if isValueKeyboardPresented {
										ValueKeyboard(isPresented: $isValueKeyboardPresented, value: $exerciseValue)
								}
						}
				}
		}
		
		private func save() {
				if let exercise {
						exercise.name = name
						exercise.exerciseDescription = description
						
						exercise.metric = metric
						exercise.suggestedReps = reps
						exercise.suggestedDuration = duration
						exercise.suggestedDistance = distance
						
						exercise.isPartOfProgression = isPartOfProgression
				} else {
						let newExercise = Exercise(name, metric)
						modelContext.insert(newExercise)
						// try? modelContext.save()
				}
		}
}

#Preview {
		ExerciseEditor()
}