//
//  ViewController.swift
//  SwiftExample
//
//  Created by Wenchao Ding on 9/3/15.
//  Copyright (c) 2015 wenchao. All rights reserved.
//

import UIKit

class InterfaceBuilderViewController: UIViewController, FSCalendarDataSource, FSCalendarDelegate {

    @IBOutlet weak var calendar: FSCalendar!
    @IBOutlet weak var calendarHeightConstraint: NSLayoutConstraint!
    
    private let formatter: DateFormatter = {
        let formatter = DateFormatter()
        formatter.dateFormat = "yyyy/MM/dd"
        return formatter
    }()
    private let gregorian: NSCalendar! = NSCalendar(calendarIdentifier:NSCalendar.Identifier.gregorian)
    
    let datesWithCat = ["2015/05/05","2015/06/05","2015/07/05","2015/08/05","2015/09/05","2015/10/05","2015/11/05","2015/12/05","2016/01/06",
    "2016/02/06","2016/03/06","2016/04/06","2016/05/06","2016/06/06","2016/07/06"]
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        self.calendar.appearance.caseOptions = [.headerUsesUpperCase,.weekdayUsesUpperCase]
        self.calendar.select(self.formatter.date(from: "2015/10/10")!)
//        self.calendar.scope = .week
        self.calendar.scopeGesture.isEnabled = true
//        calendar.allowsMultipleSelection = true

        // Uncomment this to test month->week and week->month transition
        /*
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (Int64)(2.5 * Double(NSEC_PER_SEC))), dispatch_get_main_queue()) { () -> Void in
            self.calendar.setScope(.Week, animated: true)
            dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (Int64)(1.5 * Double(NSEC_PER_SEC))), dispatch_get_main_queue()) { () -> Void in
                self.calendar.setScope(.Month, animated: true)
            }
        }
        */

    }

    func minimumDate(for calendar: FSCalendar) -> Date {
        return self.formatter.date(from: "2015/01/01")!
    }
    
    func maximumDate(for calendar: FSCalendar) -> Date {
        return self.formatter.date(from: "2016/10/31")!
    }
    
    func calendar(_ calendar: FSCalendar, numberOfEventsFor date: Date) -> Int {
        let day: Int! = self.gregorian.component(.day, from: date)
        return day % 5 == 0 ? day/5 : 0;
    }

    func calendarCurrentPageDidChange(_ calendar: FSCalendar) {
        NSLog("change page to \(self.formatter.string(from: calendar.currentPage))")
    }
    
    func calendar(_ calendar: FSCalendar, didSelect date: Date) {
        NSLog("calendar did select date \(self.formatter.string(from: date))")
    }
    
    func calendar(_ calendar: FSCalendar, boundingRectWillChange bounds: CGRect, animated: Bool) {
        calendarHeightConstraint.constant = bounds.height
        view.layoutIfNeeded()
    }
    
    func calendar(_ calendar: FSCalendar, imageFor date: Date) -> UIImage? {
        let day: Int! = self.gregorian.component(.day, from: date)
        return [13,24].contains(day) ? UIImage(named: "icon_cat") : nil
    }
    
}