LONDON-IOS/GME Remit/Modules/RemittanceModules/OverseasModules/SelectCoupon/User Interface/View/Cell/CouponCell.swift

//
//  CouponCell.swift
//  GME Remit
//
//  Created by InKwon Devik Kim on 30/05/2019.
//  Copyright © 2019 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit

class CouponCell: UITableViewCell {
  @IBOutlet private weak var couponCellBackgroundView: UIView!
  @IBOutlet private weak var checkImageView: UIImageView!
  @IBOutlet private weak var couponNameLabel: UILabel!
  @IBOutlet private weak var discountLabel: UILabel!

  @IBOutlet private weak var remindDayLabel: UILabel!
  @IBOutlet private weak var expireDateLabel: UILabel!
  
  var isSelectedCoupon: Bool = false {
    didSet {
      if isSelectedCoupon {
        checkImageView.image = UIImage(named: "right")
        couponCellBackgroundView.layer.cornerRadius = 5
        couponCellBackgroundView.layer.borderWidth = 1
        couponCellBackgroundView.layer.borderColor = UIColor.themeRed.cgColor
        
      } else {
        checkImageView.image = nil
        couponCellBackgroundView.layer.borderColor = UIColor.white.cgColor
      }
    }
  }
  
  override func awakeFromNib() {
    super.awakeFromNib()
    couponCellBackgroundView.layer.cornerRadius = 5
  }

  func setModel(_ model: Coupon?) {
    couponNameLabel.text = model?.couponName?.uppercased()
    
    let discount =
      model?.discountType == "1" ? "\(model?.discountPercent ?? "0")%" : "\(model?.discountValue ?? "0") KRW"
    
    discountLabel.text = "(\(discount))"
    
    guard let remindDay = calculateRemindDay(expireDate: model?.expireDate) else {
      remindDayLabel.text = "N/A"
      return
    }
    
    switch remindDay {
    case 0:
      remindDayLabel.text = "Today"
      remindDayLabel.textColor = .themeRed
    case remindDay where remindDay > 0:
      remindDayLabel.text = "\(remindDay) day"
    default:
      remindDayLabel.text = "N/A"
    }
    
    expireDateLabel.text = "(\(model?.expireDate ?? "N/A"))"
  }
  
  private func calculateRemindDay(expireDate: String?) -> Int? {
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "yyyy-MM-dd"
    
    guard
      let expireDate = expireDate,
      let expireDay = dateFormatter.date(from: expireDate)
      else {
        return nil
    }
    
    let calendar = Calendar.current
    let date1 = calendar.startOfDay(for: Date())
    let date2 = calendar.startOfDay(for: expireDay)
    
    return calendar.dateComponents([.day], from: date1, to: date2).day
  }
}