UtilizationTrendInterfaceController.swift

//
//  UtilizationTrendInterfaceController.swift
//  SynchronyFinancial WatchKit Extension
//
//  Created by Alan Maynard on 4/17/19.
//  Copyright © 2019 Alan Maynard. All rights reserved.
//

import WatchKit
import Foundation

class UtilizationTrendInterfaceController: WKInterfaceController {
    @IBOutlet var trendImage: WKInterfaceImage!
    @IBOutlet var trendLabel: WKInterfaceLabel!

    var previousUtilization: Int?
    var currentUtilization: Int?

    override func awake(withContext context: Any?) {
        super.awake(withContext: context)
        guard let data = context as? [Int], data.count == 2 else {
            NSLog("Error getting utilization data from wellness.")
            return
        }
        previousUtilization = data[1]
        currentUtilization = data[0]
        configure()
    }

    override func didAppear() {
        // This method is called when watch view controller is about to be visible to user
        super.didAppear()
        animate(withDuration: 1.5) {
            self.trendImage.setAlpha(1.0)
            self.trendLabel.setAlpha(1.0)
        }
    }

    override func didDeactivate() {
        // This method is called when watch view controller is no longer visible
        super.didDeactivate()
    }

    private func configure() {
        if let prev = previousUtilization, let curr = currentUtilization {
            if prev > curr {
                trendImage.setImageNamed("arrow_down")
                trendLabel.setText("Down from \(prev)% last statement.")
            } else {
                trendImage.setImageNamed("arrow_up")
                trendLabel.setText("Up from \(prev)% last statement.")
            }
        }
    }

}