ScheduleTime

//
//  ViewController.swift
//  Schedule
//
//  Created by nguyen.van.hung on 11/8/16.
//  Copyright © 2016 nguyen.van.hung. All rights reserved.
//

import UIKit

class ViewController: UIViewController {

    struct ScheduleTime {
        var startTime: CGFloat = 0
        var endTime: CGFloat = 0
    }

    struct ScheduleKey: Hashable {
        var startRange: CGFloat = 0
        var endRange: CGFloat = 0

        var hashValue: Int {
            return startRange.hashValue ^ endRange.hashValue
        }

        static func ==(k1: ScheduleKey, k2: ScheduleKey) -> Bool {
            return k1.startRange == k2.startRange && k1.endRange == k2.endRange
        }
    }


    @IBOutlet weak var scheduleScrollView: UIScrollView!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        // init schedule list
        var schedules = [
            ScheduleTime(startTime: 0, endTime: 21),
            ScheduleTime(startTime: 10, endTime: 11),
            ScheduleTime(startTime: 13, endTime: 14),
            ScheduleTime(startTime: 13.5, endTime: 14.5),
            ScheduleTime(startTime: 13.5, endTime: 16.5),
            ScheduleTime(startTime: 13.5, endTime: 15.5),
            ScheduleTime(startTime: 12.5, endTime: 15.5),
            ScheduleTime(startTime: 10.5, endTime: 17.5)
        ]

        schedules.sort { (schedule1, schedule2) -> Bool in
            return schedule1.startTime < schedule2.startTime
        }

        var scheduleGroup = [ScheduleKey: [ScheduleTime]]()

        for schedule in schedules {
            var foundKey: ScheduleKey?
            for key in scheduleGroup.keys {
                if schedule.startTime >= key.startRange && schedule.startTime < key.endRange {
                    // insert into group
                    foundKey = key
                    break
                }
            }

            if let k = foundKey {
                let key = ScheduleKey(startRange: k.startRange, endRange: max(schedule.endTime, k.endRange))
                var arr = scheduleGroup[k]
                scheduleGroup.removeValue(forKey: k)
                arr?.append(schedule)
                scheduleGroup[key] = arr
            } else {
                let key = ScheduleKey(startRange: schedule.startTime, endRange: schedule.endTime)
                var arr = [ScheduleTime]()
                arr.append(schedule)
                scheduleGroup[key] = arr
            }
        }

        let contentView = createScheduleBoardView()
        scheduleScrollView.addSubview(contentView)

        let paddingLeft: CGFloat = 80
        let width = contentView.frame.size.width - paddingLeft
        let height: CGFloat = 100

        for key in scheduleGroup.keys {
            if let arr = scheduleGroup[key] {
                let w = width / CGFloat(arr.count)
                for i in 0..<arr.count {
                    let schedule = arr[i]
                    let v = UIView(frame: CGRect(x: paddingLeft + CGFloat(i) * w, y: schedule.startTime * height, width: w, height: height * (schedule.endTime - schedule.startTime)))
                    v.backgroundColor = getRandomColor()
                    contentView.addSubview(v)
                }
            }
        }

        scheduleScrollView.contentSize = CGSize(width: width, height: CGFloat(24) * height)
        scheduleScrollView.contentOffset = CGPoint(x: 0, y: 9.0 * height)
    }

    func getRandomColor() -> UIColor{
        let randomRed:CGFloat = CGFloat(drand48())
        let randomGreen:CGFloat = CGFloat(drand48())
        let randomBlue:CGFloat = CGFloat(drand48())
        return UIColor(red: randomRed, green: randomGreen, blue: randomBlue, alpha: 1.0)

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func createScheduleBoardView() -> UIView {
        let boardView = UIView(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.size.width, height: UIScreen.main.bounds.size.height))
        for i in 0...24 {
            let line = UIView(frame: CGRect(x: 0.0, y: CGFloat(i) * 100.0, width: UIScreen.main.bounds.size.width, height: 0.5))
            line.backgroundColor = #colorLiteral(red: 0.501960814, green: 0.501960814, blue: 0.501960814, alpha: 1)
            boardView.addSubview(line)
            let label = UILabel(frame: CGRect(x: 0.0, y: CGFloat(i) * 100.0 - 30.0, width: UIScreen.main.bounds.size.width, height: 30))
            label.text = String(i)
            boardView.addSubview(label)
        }
        return boardView
    }
}