import UIKit

class DateAndTime {
    let hourFormatter = DateFormatter()
    let dateFormatter = DateFormatter()
    var calendar = Calendar.current
    var Dates: [String] = [];
    var Hours: [String] = [];
    var todayHours: [String] = [];
    let ASAPMessage = "Around 30 Minutes!";
    init(){
        createDates()
        createHours()
        createTodayHours()
    }

    func hourToString(){
        //let d = hourFormatter.date(from: "8:30 Pm")

        //        endHour = calendar.date(byAdding: .minute, value: 30, to: startHour)!
    }
    func createTodayHours(){

        hourFormatter.dateFormat = "h:mm a"
        hourFormatter.timeZone = TimeZone(identifier: "PST")
        var calendar = Calendar.current
        calendar.timeZone = TimeZone(identifier: "PST")!

        var today = Date()

        let currentMinute = calendar.component(.minute, from: today)

        if currentMinute == 0 {
            today = calendar.date(byAdding: .minute, value: 30, to: today)!
        }else if 30-currentMinute > 0 {
            today = calendar.date(byAdding: .minute, value: 60 - currentMinute, to: today)!
        }else{
            //why 90? lets say the current time is 10:31, if we do 30-31<0, so in order to
            //round to make the time at 11:30 we have to do 29+30=59 to get to 11:30. so 90-31=59
            today = calendar.date(byAdding: .minute, value: 90 - currentMinute, to: today)!;
        }
        let indexOfHour = Hours.firstIndex(of: hourFormatter.string(from: today));
        todayHours = Array(Hours[indexOfHour!...])
        print(todayHours)
    }

    func createHours(){

        hourFormatter.dateFormat = "h:mm a"
        hourFormatter.timeZone = TimeZone(identifier: "UTC")

        var startHour = hourFormatter.date(from: "12:00 Am")
        let endHour = hourFormatter.date(from: "6:00 Pm")

        while startHour! <= endHour! {
            Hours.append(hourToString(hour: startHour!))
            startHour = calendar.date(byAdding: .minute, value: 30, to: startHour!)
        }
        print(Hours)
    }

    func hourToString(hour : Date) -> String {

        hourFormatter.timeZone = TimeZone(identifier: "UTC")
        hourFormatter.dateFormat = "h:mm a"
        return hourFormatter.string(from: hour)
    }

    //Dates
    func createDates(){
        var startDate = Date()
        let endDate = calendar.date(byAdding: .day, value: 10, to: startDate)!

        while startDate <= endDate {
            Dates.append(dateToString(day: startDate))
            startDate = calendar.date(byAdding: .day, value: 1, to: startDate)!
        }
        print(Dates)
    }
    func dateToString(day : Date) -> String {
        dateFormatter.dateFormat = "E M/d"
        return dateFormatter.string(from: day).capitalized

    }
}