//
//  Onboarding.swift
//  WorkoutsPlus
//
//  Created by Felix Förtsch on 04.09.24.
//

import SwiftUI


// TODO: Inspiration holen von https://github.com/SvenTiigi/WhatsNewKit
struct Onboarding: View {
		@Default(\.isFirstAppStart) var isFirstAppStart
		@Default(\.isOnboarding) var isOnboarding
		@Default(\.userId) var userId
		
		@State private var currentPage = 0
		let totalPages = 3
		
		var body: some View {
				VStack {
						TabView(selection: $currentPage) {
								ForEach(0..<totalPages, id: \.self) { index in
										VStack {
												Spacer()
												
												Image(systemName: "scribble.variable")
														.resizable()
														.scaledToFit()
														.frame(width: 150, height: 150)
														.foregroundColor(.blue)
												
												Text("userID: \(userId)")
														.font(.largeTitle)
														.fontWeight(.bold)
														.multilineTextAlignment(.center)
														.padding(.top, 40)
												
												Text("Erfahren Sie, wie MyApp Ihnen helfen kann, produktiver zu sein.")
														.font(.title3)
														.foregroundColor(.gray)
														.multilineTextAlignment(.center)
														.padding(.horizontal, 40)
														.padding(.top, 20)
												
												Spacer()
												
												HStack {
														if currentPage > 0 {
																Button("Zurück") {
																		currentPage -= 1
																}
																.padding(.horizontal, 40)
														}
														
														Spacer()
														
														Button(currentPage == totalPages - 1 ? "Los geht's!" : "Weiter") {
																if currentPage < totalPages - 1 {
																		currentPage += 1
																} else {
																		if (isFirstAppStart) {
																				userId = UUID().uuidString
																		}
																		isFirstAppStart = false
																		isOnboarding = false
																}
														}
														.padding(.horizontal, 40)
												}
												.padding(.bottom, 40)
										}
										.tag(index)
								}
						}
						.tabViewStyle(PageTabViewStyle(indexDisplayMode: .always))
				}
		}
}

#Preview {
		Onboarding()
}