FeatureViewController.swift

//
//  FeatureViewController.swift
//  IOS11AppStoreClone
//
//  Created by Ajay Singh on 24/7/18.
//  Copyright © 2018 Ajay Singh. All rights reserved.
//

import UIKit
class FeatureViewController:  UIViewController,UICollectionViewDataSource,UICollectionViewDelegateFlowLayout {
    
    var collectionView:UICollectionView = {let collectionView = UICollectionView(frame:CGRect.zero, collectionViewLayout: UICollectionViewFlowLayout())
        return collectionView;
        
    }()
    override func viewDidLoad() {
        super.viewDidLoad()
        self.title = "Features"
        self.configureCollectionView();
    }
    
    func configureCollectionView() ->Void{
        self.view.addSubview(collectionView)
        collectionView.register(FeatureViewCell.self, forCellWithReuseIdentifier: "featureCell")
        collectionView.register(ImageViewCardCell.self, forCellWithReuseIdentifier: "imageViewCard")
        //  collectionView.backgroundColor = UIColor(red: 223/255, green: 226/255, blue: 229/255, alpha: 1)
        collectionView.backgroundColor = UIColor.white
        // let layoutGuide = self.view.safeAreaLayoutGuide
        collectionView.translatesAutoresizingMaskIntoConstraints = false
        collectionView.leadingAnchor.constraint(equalTo: self.view.leadingAnchor, constant: 0).isActive = true
        collectionView.topAnchor.constraint(equalTo: self.view.topAnchor, constant: 0).isActive = true
        collectionView.bottomAnchor.constraint(equalTo: self.view.bottomAnchor, constant: 0).isActive = true
        collectionView.trailingAnchor.constraint(equalTo: self.view.trailingAnchor, constant: 0).isActive = true
        collectionView.dataSource = self
        let flowLayout = collectionView.collectionViewLayout as! UICollectionViewFlowLayout;
        flowLayout.minimumLineSpacing = 0
        flowLayout.minimumInteritemSpacing = 0
        flowLayout.sectionInset = UIEdgeInsets(top: 0, left:0, bottom: 0, right:0)
        collectionView.delegate = self
        
    }
    
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 10
    }
    
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        if(indexPath.row%2==0){
        let  cell = collectionView.dequeueReusableCell(withReuseIdentifier: "imageViewCard", for: indexPath) as! ImageViewCardCell
            return cell;
        }
        let  cell = collectionView.dequeueReusableCell(withReuseIdentifier: "featureCell", for: indexPath) as! FeatureViewCell
        return cell;
    }
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        if(indexPath.row%2==0){
            return CGSize(width: self.view.frame.size.width-40, height: 300)
        }
        return CGSize(width: self.view.frame.size.width, height: 200)
    }
    
}

class FeatureViewCell:UICollectionViewCell,UICollectionViewDataSource,UICollectionViewDelegate, UICollectionViewDelegateFlowLayout{
    
    let collectionView:UICollectionView = {
        let collectionView = UICollectionView(frame: CGRect.zero, collectionViewLayout: UICollectionViewFlowLayout())
        collectionView.backgroundColor = UIColor.white;
        return collectionView
    }()
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        self.setupSubViews()
    }
    
    func setupSubViews() ->Void{
        self.backgroundColor = UIColor.black;
        self.contentView.addSubview(collectionView);
        collectionView.snp.makeConstraints { (make) in
            make.leading.trailing.bottom.top.equalTo(self.contentView)
        }
        collectionView.delegate = self;
        collectionView.dataSource = self;
        let flowLayout = collectionView.collectionViewLayout as! UICollectionViewFlowLayout;
        flowLayout.scrollDirection = .horizontal;
        collectionView.showsHorizontalScrollIndicator = false;
        collectionView.register(AppCell.self, forCellWithReuseIdentifier: "appCell")
        
    }
    
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 7
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let  cell = collectionView.dequeueReusableCell(withReuseIdentifier: "appCell", for: indexPath) as! AppCell
        return cell;
    }
    
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width: 200, height: 200)
    }
}

class AppCell:UICollectionViewCell{
    let cardView:UIView = {
        let cardView = UIView()
        cardView.backgroundColor = UIColor.white
        cardView.layer.cornerRadius = 10
        cardView.layer.masksToBounds = true
        cardView.isUserInteractionEnabled = true
        return cardView
    }()
    
    let imageView:UIImageView = {
        let imageView = UIImageView()
        imageView.image = UIImage(named: "CardImage5")
        return imageView
    }()
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        self.setupSubViews();
    }
    
    func setupSubViews() ->Void{
        self.contentView.addSubview(cardView)
        cardView.snp.makeConstraints { (make) in
            make.leading.equalTo(self.contentView).offset(20)
            make.trailing.equalTo(self.contentView).offset(-20)
            make.top.equalTo(self.contentView).offset(20)
            make.bottom.equalTo(self.contentView).offset(-20)
        }
        
        cardView.addSubview(imageView)
        imageView.snp.makeConstraints { (make) in
            make.leading.trailing.top.bottom.equalTo(cardView)
        }
    }
    
}