import Foundation

@IBOutlet weak var collectionView: UICollectionView!
@IBOutlet weak var continueButton: RoundedButton!
@IBOutlet weak var notSureButton: RoundedButton!
@IBOutlet weak var notSureButtonTop: NSLayoutConstraint!

var collectionData = [[String: String]]()


override func viewDidLoad() {
    super.viewDidLoad()
    self.appointment = fetchAppointment()
    self.collectionView.delegate = self
    self.collectionView.dataSource = self
    self.collectionData.append([
        "image": "regularExam",
        "text": "Regular Exam",
        "data": "regular_exam"])
    self.collectionData.append([
        "image": "vaccines",
        "text": "Essential Vaccines",
        "data": "vaccines"])
    self.collectionData.append([
        "image": "meds",
        "text": "Parasite Meds",
        "data": "preventitive_meds"])
    self.collectionData.append([
        "image": "dog",
        "text": "My pet is sick",
        "data": "sick_pet"])

    self.notSureButton.layer.shadowColor = Constants.appColor.gray.light.cgColor
    self.notSureButton.layer.shadowOffset = CGSize(width: 0, height: 2.0)
    self.notSureButton.layer.shadowRadius = 3.0
    self.notSureButton.layer.shadowOpacity = 0.8
    self.notSureButton.layer.masksToBounds = false
}

override func viewDidLayoutSubviews(){
    self.collectionView.frame = CGRect(x: self.collectionView.frame.origin.x, y:  self.collectionView.frame.origin.y, width: self.collectionView.frame.size.width, height: CGFloat(2 * 170))
    self.notSureButtonTop.constant = CGFloat(2 * 170) + 20.0
    self.view.layoutIfNeeded()
    self.collectionView.reloadData()
}

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return self.collectionData.count
}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "SelectVisitForCollectionViewCell", for: indexPath) as! SelectVisitForCollectionViewCell
    let item = indexPath.item

    cell.displayContent(image: UIImage(named: self.collectionData[item]["image"]!)!, text: self.collectionData[item]["text"]!)

    return cell
}

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    if let cell = collectionView.cellForItem(at: indexPath) as? SelectVisitForCollectionViewCell {
        var categories = self.appointment?.categories
        if let index = categories!.index(of: self.collectionData[indexPath.item]["data"]!) {
            categories?.remove(at: index)
            cell.showSelected(false)
        } else {
            categories?.append(self.collectionData[indexPath.item]["data"]!)
            cell.showSelected(true)
        }

        self.appointment?.categories = categories!

        if (self.appointment?.categories.count)! > 0 {
            self.continueButton.isHidden = false
        } else {
            self.continueButton.isHidden = true
        }

        saveAppointment(data: self.appointment!)
    }
}


@IBAction func onNotSureButtonPressed(_ sender: Any) {
    var categories = self.appointment?.categories
    if let index = categories!.index(of: "not_sure") {
        categories?.remove(at: index)
        self.notSureButton.backgroundColor = UIColor.white
        self.notSureButton.setTitleColor(Constants.appColor.gray.dark, for: .normal)
    } else {
        categories?.append("not_sure")
        self.notSureButton.backgroundColor = Constants.appColor.yellow.main
        self.notSureButton.setTitleColor(UIColor.white, for: .normal)
    }

    self.appointment?.categories = categories!

    if (self.appointment?.categories.count)! > 0 {
        self.continueButton.isHidden = false
    } else {
        self.continueButton.isHidden = true
    }
    print(self.appointment?.categories)
    saveAppointment(data: self.appointment!)
}

@IBAction func onContinueButtonPressed(_ sender: Any) {
    self.parentPageboy?.scrollToPage(.next, animated: true)
}