using System;
using System.Collections.Generic;
using System.Globalization;
using Wino.Core.Domain.Enums;

namespace Wino.Core.Domain.Models.Calendar;

public record CalendarSettings(DayOfWeek FirstDayOfWeek,
                               List<DayOfWeek> WorkingDays,
                               TimeSpan WorkingHourStart,
                               TimeSpan WorkingHourEnd,
                               double HourHeight,
                               DayHeaderDisplayType DayHeaderDisplayType,
                               CultureInfo CultureInfo)
{
    public TimeSpan? GetTimeSpan(string selectedTime)
    {
        // Regardless of the format, we need to parse the time to a TimeSpan.
        // User may list as 14:00 but enters 2:00 PM by input.
        // Be flexible, not annoying.

        if (DateTime.TryParse(selectedTime, out DateTime parsedTime))
        {
            return parsedTime.TimeOfDay;
        }
        else
        {
            return null;
        }
    }

    public string GetTimeString(TimeSpan timeSpan)
    {
        // Here we don't need to be flexible cuz we're saving back the value to the combos.
        // They are populated based on the format and must be returned with the format.

        var format = DayHeaderDisplayType switch
        {
            DayHeaderDisplayType.TwelveHour => "h:mm tt",
            DayHeaderDisplayType.TwentyFourHour => "HH:mm",
            _ => throw new ArgumentOutOfRangeException(nameof(DayHeaderDisplayType))
        };

        var dateTime = DateTime.Today.Add(timeSpan);
        return dateTime.ToString(format, CultureInfo.InvariantCulture);
    }
}
