djid_sirani_ios/Sirani/View/ScanQR/Scanner/ScanQRVC.swift

//
//  ScanQRVC.swift
//  Sirani
//
//  Created by Anhar Solehudin on 03/04/19.
//  Copyright © 2019 Anhar Solehudin. All rights reserved.
//

import UIKit

class ScanQRVC: UIViewController {
    
    // View Lifecycles
    override var preferredStatusBarStyle: UIStatusBarStyle {
        return .lightContent
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        // Canvas background
        self.view.backgroundColor = UIColor.siraniCanvasBackground
        
        let container = UIView()
        container.translatesAutoresizingMaskIntoConstraints = false
        container.backgroundColor = .white
        container.layer.cornerRadius = 20
        container.layer.shadowColor = UIColor.black.cgColor
        container.layer.shadowOffset = CGSize(width: 0, height: 4)
        container.layer.shadowRadius = 12
        container.layer.shadowOpacity = 0.08
        self.view.addSubview(container)
        self.view.sendSubviewToBack(container)
        
        let titleLabel = UILabel()
        titleLabel.translatesAutoresizingMaskIntoConstraints = false
        titleLabel.text = "Pemindai QR Code"
        titleLabel.font = UIFont.systemFont(ofSize: 20, weight: .bold)
        titleLabel.textColor = UIColor.siraniTextPrimary
        titleLabel.textAlignment = .center
        
        let subtitleLabel = UILabel()
        subtitleLabel.translatesAutoresizingMaskIntoConstraints = false
        subtitleLabel.text = "Arahkan kamera Anda ke QR Code yang terdapat pada label perangkat telekomunikasi untuk melihat detail sertifikasi."
        subtitleLabel.font = UIFont.systemFont(ofSize: 14, weight: .regular)
        subtitleLabel.textColor = UIColor.siraniTextSecondary
        subtitleLabel.numberOfLines = 0
        subtitleLabel.textAlignment = .center
        
        container.addSubview(titleLabel)
        container.addSubview(subtitleLabel)
        
        NSLayoutConstraint.activate([
            container.centerXAnchor.constraint(equalTo: self.view.centerXAnchor),
            container.centerYAnchor.constraint(equalTo: self.view.centerYAnchor, constant: -50),
            container.leadingAnchor.constraint(equalTo: self.view.leadingAnchor, constant: 20),
            container.trailingAnchor.constraint(equalTo: self.view.trailingAnchor, constant: -20),
            container.heightAnchor.constraint(equalToConstant: 240),
            
            titleLabel.topAnchor.constraint(equalTo: container.topAnchor, constant: 36),
            titleLabel.leadingAnchor.constraint(equalTo: container.leadingAnchor, constant: 16),
            titleLabel.trailingAnchor.constraint(equalTo: container.trailingAnchor, constant: -16),
            
            subtitleLabel.topAnchor.constraint(equalTo: titleLabel.bottomAnchor, constant: 16),
            subtitleLabel.leadingAnchor.constraint(equalTo: container.leadingAnchor, constant: 20),
            subtitleLabel.trailingAnchor.constraint(equalTo: container.trailingAnchor, constant: -20)
        ])
        
        // Style scan button
        for subview in self.view.subviews {
            if let containerView = subview as? UIView {
                for inner in containerView.subviews {
                    if let btn = inner as? UIButton {
                        btn.layer.cornerRadius = 20
                        btn.clipsToBounds = true
                        btn.backgroundColor = UIColor.siraniPrimaryBlue
                    }
                }
            }
        }
    }
    
    @IBAction func navToResultQRCode(_ sender: Any) {
        performSegue(withIdentifier: "QrScannerSegueId", sender: self)
    }
    
    // Actions
    @IBAction func unwindToScanQr(segue: UIStoryboardSegue) {}

}