//

//  ViewController.swift

//  TestCharts

//

//  Created by LinJK on 22/12/2016.

//  Copyright © 2016 LinJK. All rights reserved.

//

import UIKit

import Charts

class ViewController: UIViewController, ChartViewDelegate{

    var charView:LineChartView?

    var xAxis:XAxis?

    override func viewDidLoad() {

        super.viewDidLoad()

        //

        charView = LineChartView(frame: CGRect(x: 0, y: 50, width: 300, height: 200))

        charView!.delegate = self

        charView!.chartDescription?.enabled = false

        charView!.dragEnabled = false

        charView!.setScaleEnabled(true)

        charView!.pinchZoomEnabled = false

        charView!.drawGridBackgroundEnabled = false

        charView!.highlightPerDragEnabled = true

        charView!.backgroundColor = UIColor.white

        charView!.legend.enabled = true

        xAxis = charView?.xAxis

        xAxis!.labelPosition = XAxis.LabelPosition.topInside

        xAxis!.labelFont = UIFont(name: "HelveticaNeue", size: 10)!

        xAxis!.labelTextColor = UIColor(red: 255/255.0, green: 192/255.0, blue: 56/255.0, alpha: 1.0)

        xAxis!.drawAxisLineEnabled = false

        xAxis!.drawGridLinesEnabled = true

        xAxis!.centerAxisLabelsEnabled = true

        xAxis!.granularity = 3600.0

        charView!.rightAxis.enabled = false

        charView!.legend.form = Legend.Form.line

        self.view.addSubview(charView!)

        self.updateChartData()

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }

    func updateChartData() {

        let count = 100.0

        let range = 30.0

        let hourSeconds:TimeInterval = 3600.0

        let now = NSDate().timeIntervalSince1970

        let from:TimeInterval = now-(count/2.0)*hourSeconds

        let to:TimeInterval = now+(count/2.0)*hourSeconds

        var values:[ChartDataEntry] = []

        var x = from

        while x < to {

            values.append(ChartDataEntry(x: x, y: Double(arc4random_uniform(UInt32(range)))+50))

            x += hourSeconds

        }

        var set1:LineChartDataSet?

        set1 = LineChartDataSet(values: values, label: "DataSet1")

        set1!.axisDependency = YAxis.AxisDependency.left

        set1!.valueTextColor = UIColor(red: 51/255.0, green: 181/255.0, blue: 229/255.0, alpha: 1.0)

        set1!.lineWidth = 1.5

        set1!.drawCirclesEnabled = false

        set1!.drawValuesEnabled = false

        set1!.fillAlpha = 0.26

        set1!.fillColor = UIColor(red: 51/255.0, green: 181/255.0, blue: 229/255.0, alpha: 1.0)

        set1!.highlightColor = UIColor(red: 224/255.0, green: 117/255.0, blue: 117/255.0, alpha: 1.0)

        set1!.drawCircleHoleEnabled = false

        var dataSets:[ChartDataSet] = []

        dataSets.append(set1!)

        let data:LineChartData! = LineChartData(dataSets: dataSets)

        data.setValueTextColor(UIColor.white)

        data.setValueFont(UIFont(name: "HelveticaNeue-Light", size: 9.0))

        charView?.data = data

        if charView!.data!.dataSetCount > 0 {

            set1 = charView!.data?.dataSets[0] as! LineChartDataSet?

            set1!.values = values

            charView!.data?.notifyDataChanged()

            charView!.notifyDataSetChanged()

        }

    }

    //MARK: ChartViewDelegate

    func chartValueSelected(_ chartView: ChartViewBase, entry: ChartDataEntry, highlight: Highlight) {

        print("chartValueSelected")

    }

    func chartValueNothingSelected(_ chartView: ChartViewBase) {

        print("chartValueNothingSelected")

    }

}