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

import SwiftUI
import SwiftData

struct ExerciseEditor: View {
		@Environment(\.dismiss) private var dismiss
		@Environment(\.modelContext) private var modelContext
		
		@State var exercise: Exercise
		
		@State private var name: String = ""
		@State private var description: String = ""
		@State private var isPartOfProgression: Bool = false
		
		@State private var type: ExerciseType?
		@State private var unit: ExerciseUnit?
		
		@Query(sort: \ExerciseType.name) private var exerciseTypes: [ExerciseType]
		@Query(sort: \ExerciseUnit.name) private var exerciseUnits: [ExerciseUnit]
		
		var body: some View {
				Form {
						Section {
								TextField("Exercise Name", text: $name)
								TextEditorWithPlaceholder(text: $description, placeholder: "Description (optional)")
						}
						Section(footer: Text("""
																																		Examples:
																																		• Pull-up → None
																																		• Weighted Pull-up → Weight 
																																		• Sprint → Time or Distance
																																		""")) {
								Picker("Exercise Type", selection: $type) {
										Text("None").tag(nil as ExerciseType?)
										ForEach(exerciseTypes, id: \.self) { type in
												Text("\(type.name)").tag(type as ExerciseType?)
										}
								}
								.pickerStyle(NavigationLinkPickerStyle())
								Picker("Exercise Unit", selection: $unit) {
										Text("None").tag(nil as ExerciseUnit?)
										ForEach(exerciseUnits, id: \.self) { unit in
												Text("\(unit.name) (\(unit.symbol))").tag(unit as ExerciseUnit?)
										}
								}
								.pickerStyle(NavigationLinkPickerStyle())
						}
						Section(footer: Text("Feature coming soon.")) {
								Toggle(isOn: $isPartOfProgression) {
										Text("Exercise is Part of a Progression")
												.foregroundStyle(.gray)
								}
								.disabled(true)
						}
				}
				.navigationTitle("Edit Exercise")
				.toolbar {
						ToolbarItem(placement: .topBarTrailing) {
								Button("Save") {
										saveExisting()
										dismiss()
								}
						}
				}
				.onAppear() {
						name = exercise.name
						description = exercise.exerciseDescription
						isPartOfProgression = exercise.isPartOfProgression
						if let type = exercise.type {
								self.type = type
						}
						if let unit = exercise.unit {
								self.unit = unit
						}
				}
		}
		
		private func saveExisting() {
				exercise.name = name
				exercise.exerciseDescription = description
				exercise.isPartOfProgression = isPartOfProgression
				exercise.type = type
				exercise.unit = unit
		}
}

#Preview {
		ModelContainerPreview(ModelContainer.sample) {
				NavigationStack {
						ExerciseEditor(exercise: Exercise.sampleDataRecommendedRoutine.first!)
				}
		}
}