using System.Collections.Generic;
using System.Linq;
using Itenso.TimePeriod;
using Wino.Core.Domain.Enums;

namespace Wino.Core.Domain.Models.Calendar
{
    /// <summary>
    /// Represents a range of days in the calendar.
    /// Usually it's used for day or week, but supports custom ranges.
    /// </summary>
    public class DayRangeRenderModel
    {
        public ITimePeriod Period { get; }
        public List<CalendarDayModel> CalendarDays { get; } = new List<CalendarDayModel>();
        public List<DayHeaderRenderModel> DayHeaders { get; } = new List<DayHeaderRenderModel>();
        public CalendarRenderOptions CalendarRenderOptions { get; }

        public DayRangeRenderModel(CalendarRenderOptions calendarRenderOptions)
        {
            CalendarRenderOptions = calendarRenderOptions;

            for (var i = 0; i < CalendarRenderOptions.TotalDayCount; i++)
            {
                var representingDate = calendarRenderOptions.DateRange.StartDate.AddDays(i);
                var calendarDayModel = new CalendarDayModel(representingDate, calendarRenderOptions);

                CalendarDays.Add(calendarDayModel);
            }

            Period = new TimeRange(CalendarDays.First().RepresentingDate, CalendarDays.Last().RepresentingDate.AddDays(1));

            // Create day headers based on culture info.

            for (var i = 0; i < 24; i++)
            {
                var representingDate = calendarRenderOptions.DateRange.StartDate.Date.AddHours(i);

                string dayHeader = calendarRenderOptions.CalendarSettings.DayHeaderDisplayType switch
                {
                    DayHeaderDisplayType.TwelveHour => representingDate.ToString("h tt", calendarRenderOptions.CalendarSettings.CultureInfo),
                    DayHeaderDisplayType.TwentyFourHour => representingDate.ToString("HH", calendarRenderOptions.CalendarSettings.CultureInfo),
                    _ => "N/A"
                };

                DayHeaders.Add(new DayHeaderRenderModel(dayHeader, calendarRenderOptions.CalendarSettings.HourHeight));
            }
        }
    }
}