//
//  WasserhaushaltViewController.swift
//  deSynthTheOceans
//
//  Created by robinsonhus0 on 24.03.20.
//  Copyright © 2020 robinsonhus0. All rights reserved.
//

import UIKit
import AVFoundation
import Charts
import FSCalendar
import HealthKit


struct WasserSpeicher: Codable {
	let wassermenge: Double
	let speicherdatum: String
	let speicherStelle: Double
}

class WasserhaushaltViewController: UIViewController, UIScrollViewDelegate {
	@IBOutlet weak var diagrammView: UIView!
	@IBOutlet weak var scrollView: UIScrollView!
	@IBOutlet weak var pageControl: UIPageControl!
	
	let drinksImagesArray = ["tapWater", "water", "milk", "cola", "coffee", "tea", "juice", "beer"]

	var imageIndex = Int()
	
	struct Drinks {
		var name: String
		var tagesMengeFactor: Double
		var gesamtMengeFactor: Double
	}
	
	var frame = CGRect(x: 0, y: 0, width: 0, height: 0)
	var pageNumber = CGFloat()
	
	@IBOutlet weak var todaysWaterConsumptionLabel: UILabel!
	@IBOutlet weak var waterGoalProgress: UIProgressView!
	@IBOutlet weak var waterGoalLabel: UILabel!
	@IBOutlet weak var wasserMengeStepper: UIStepper!
	@IBOutlet weak var motivationTextView: UITextView!
	@IBOutlet weak var wasserglasButton: UIBarButtonItem!
	@IBOutlet weak var kleineFlascheButton: UIBarButtonItem!
	@IBOutlet weak var grosseFlascheButton: UIBarButtonItem!
	@IBOutlet weak var overAllWaterConsumptionLabel: UILabel!
	
	// added
	let scrollingImagesStackView = UIStackView()
	var stackHeightConstraint: NSLayoutConstraint!
	
	override func viewDidLoad() {
		super.viewDidLoad()
		
		pageControl.numberOfPages = drinksImagesArray.count
		setupDrinkImages()
	}
	
	
	func setupDrinkImages() {
		// set stack view properties
		scrollingImagesStackView.axis = .horizontal
		scrollingImagesStackView.alignment = .fill
		scrollingImagesStackView.distribution = .fillEqually
		scrollingImagesStackView.spacing = 0
		
		// add the stack view to the scroll view
		scrollingImagesStackView.translatesAutoresizingMaskIntoConstraints = false
		scrollView.addSubview(scrollingImagesStackView)
		
		// use scroll view's contentLayoutGuide for content constraints
		let svCLG = scrollView.contentLayoutGuide
		
		NSLayoutConstraint.activate([
			
			// stack view constrained Top / Bottom / Leading / Trailing of scroll view CONTENT guide
			scrollingImagesStackView.topAnchor.constraint(equalTo: svCLG.topAnchor),
			scrollingImagesStackView.bottomAnchor.constraint(equalTo: svCLG.bottomAnchor),
			scrollingImagesStackView.leadingAnchor.constraint(equalTo: svCLG.leadingAnchor),
			scrollingImagesStackView.trailingAnchor.constraint(equalTo: svCLG.trailingAnchor),
			
		])
		
		// create the stack view height constraint - it will be updated in viewDidLayoutSubviews
		stackHeightConstraint = scrollingImagesStackView.heightAnchor.constraint(equalToConstant: 0)
		stackHeightConstraint.isActive = true
		
		// create image views and add them to the stack view
		drinksImagesArray.forEach { imgName in
			let v = UIImageView()
			v.backgroundColor = .orange
			v.contentMode = .scaleAspectFit
			// make sure we load a valid image
			if let img = UIImage(named: imgName) {
				v.image = img
			}
			scrollingImagesStackView.addArrangedSubview(v)
		}
		
		// stack distribution is set to .fillEqually, so we only need to set the
		// width constraint on the first image view
		
		// unwrap it
		if let firstImageView = scrollingImagesStackView.arrangedSubviews.first {
			firstImageView.widthAnchor.constraint(equalTo: scrollView.frameLayoutGuide.widthAnchor).isActive = true
		}

		scrollView.delegate = self
	}
	
	override func viewDidLayoutSubviews() {
		super.viewDidLayoutSubviews()
		
		// since we have a UINavigationBar and a UIToolBar in the view hierarchy,
		//	we need to set this here
		//	Note: if the view size changes
		// stack view height == scroll view FRAME height
		stackHeightConstraint.constant = scrollView.frame.height
		
	}
	
//	func setupDrinkImages() {
//		for index in 0..<drinksImagesArray.count {
//			frame.origin.x = scrollView.frame.size.width * CGFloat(index)
//			frame.size = scrollView.frame.size
//
//			let imageView = UIImageView(frame: frame)
//			imageView.contentMode = .scaleAspectFit
//			imageView.image = UIImage(named: drinksImagesArray[index])
//			self.scrollView.addSubview(imageView)
//		}
//		scrollView.contentSize = CGSize(width: scrollView.frame.size.width * CGFloat(drinksImagesArray.count), height: scrollView.frame.size.height)
//		scrollView.delegate = self
//	}
	
	func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
		pageNumber = scrollView.contentOffset.x / scrollView.frame.size.width
		pageControl.currentPage = Int(pageNumber)
	}
}