CreditCardViewController.swift

//
//  CreditCardListViewController.swift
//  BUPNative
//
//  Created by Venkatnarayansetty, Badarinath on 7/24/19.
//

import Foundation
import UIKit

public class CreditCardViewController: UIViewController {
    
    fileprivate let reuseIdentifier = "CreditCardCell"
    fileprivate var dataSource:CollectionViewDataSource<CreditCard>?
    
    lazy var collectionView:UICollectionView = {
        let layout = UICollectionViewFlowLayout()
        layout.itemSize  = UICollectionViewFlowLayout.automaticSize
        layout.estimatedItemSize = CGSize(width: 343, height: 100)
        
        var collectionView = UICollectionView(frame: .zero, collectionViewLayout: layout)
        collectionView.translatesAutoresizingMaskIntoConstraints = false
        collectionView.register(CreditCardCell.self, forCellWithReuseIdentifier: reuseIdentifier)
        collectionView.delegate = self
        return collectionView
    }()
    
    
    public override func viewDidLoad() {
       super.viewDidLoad()
       self.view.backgroundColor = UIColor.white
       setupCollectionView()
    }
    
    func setupCollectionView() {
        self.view.addSubview(self.collectionView)
        self.collectionView.backgroundColor = UIColor.white
        
        self.collectionView.layout {
            $0.top == self.view.safeTopAnchor
            $0.leading == self.view.safeleadingAnchor + 16
            $0.trailing == self.view.safeTrailingAnchor - 16
            $0.bottom == self.view.safeBottomAnchor
        }
        
//        let collectionViewLayout = collectionView.collectionViewLayout as! UICollectionViewFlowLayout
//        collectionViewLayout.itemSize = UICollectionViewFlowLayout.automaticSize
//        collectionViewLayout.estimatedItemSize = CGSize(width: 343, height: 100)
        
        self.dataSource = CollectionViewDataSource.make(for: [CreditCard(name: "Blue Cash Preferred® Card from American Express"),CreditCard(name: "Blue Cash Everyday® Card from American Express") ], reuseIdentifier: self.reuseIdentifier)
        self.collectionView.dataSource = self.dataSource
        self.collectionView.reloadData()
    }
}

struct CreditCard {
    var name:String
}


extension CollectionViewDataSource where Model == CreditCard {
    
    static func make(for cards:[Model], reuseIdentifier: String ) -> CollectionViewDataSource {
        let dataSource = CollectionViewDataSource(models: cards, reuseIdentifier: reuseIdentifier) { (creditCard, cell) in
            let creditCardCell = cell as! CreditCardCell
            creditCardCell.creditCardName.text = creditCard.name
        }
        return dataSource
    }
}

extension AmericanExpressCreditCardViewController: UICollectionViewDelegateFlowLayout {
    
//    public func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
//        let referenceHeight: CGFloat = 200
//        return CGSize(width: self.collectionView.bounds.width, height: referenceHeight)
//    }
    
    public func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
        return UIEdgeInsets(top: 24, left: 16, bottom: 0, right: 16)
    }
}


class CreditCardCell: UICollectionViewCell {
    
    override init(frame: CGRect) {
        super.init(frame: .zero)
        setupCell()
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    let creditCardName: CardPartTextView = {
        let cardName = CardPartTextView(type: .title)
        cardName.translatesAutoresizingMaskIntoConstraints = false
        cardName.font = UIFont.mintGenericProFontBold(.transactionDollar)
        cardName.textAlignment = NSTextAlignment.center
        cardName.textColor = UIColor.MintBlackColor
        return cardName
    }()
    
    let specialOfferView: SpecialOfferView = {
        let offerView = SpecialOfferView()
        offerView.layer.cornerRadius = 4.0
        offerView.translatesAutoresizingMaskIntoConstraints = false
        offerView.backgroundColor = UIColor.specialOfferGreenBackground
        return offerView
    }()
    
    fileprivate func configureCornerAspectsForCell() {
        self.layer.cornerRadius = 4.0
        self.layer.borderColor = UIColor.MintLightGrayColor.cgColor
        self.layer.borderWidth = 2.0
    }
    
    func setupCell() {
        
        configureCornerAspectsForCell()
        
        [creditCardName, specialOfferView].forEach {
             self.addSubview($0)
        }
       
        creditCardName.layout {
            $0.top == self.topAnchor + 24
            $0.leading == self.leadingAnchor + 24
            $0.trailing == self.trailingAnchor - 24
        }
        
        specialOfferView.layout {
            $0.top == self.creditCardName.bottomAnchor + 16
            $0.centerX == self.centerXAnchor
        }
        
        NSLayoutConstraint.activate([
            specialOfferView.heightAnchor.constraint(equalToConstant: 28),
        ])
    }
    
    override func preferredLayoutAttributesFitting(_ layoutAttributes: UICollectionViewLayoutAttributes) -> UICollectionViewLayoutAttributes {
        setNeedsLayout()
        layoutIfNeeded()
        let size = contentView.systemLayoutSizeFitting(layoutAttributes.size)
        var newFrame = layoutAttributes.frame
        newFrame.size.height = ceil(size.height)
        layoutAttributes.frame = newFrame
        return layoutAttributes
    }