using System;
using TINK.Model.Bikes.Bike;
using TINK.MultilingualResources;

namespace TINK.ViewModel.Bikes.Bike
{
    /// <summary>
    /// View model for displaying tariff info.
    /// </summary>
    public class TariffDescriptionViewModel
    {
        private TariffDescription Tariff { get; }

        public TariffDescriptionViewModel(TariffDescription tariff)
        {
            Tariff = tariff;
        }

        public string Header
        {
            get
            {
                if (string.IsNullOrEmpty(FeeEuroPerHour)
                    && string.IsNullOrEmpty(AboEuroPerMonth)
                    && string.IsNullOrEmpty(FreeTimePerSession)
                    && string.IsNullOrEmpty(MaxFeeEuroPerDay))
                    // No tariff description details available.
                    return string.Empty;

                return string.Format(AppResources.MessageBikesManagementTariffDescriptionTariffHeader, Tariff?.Name ?? "-", Tariff?.Number != null ? Tariff.Number  : "-");
            }
        }

        /// <summary>
        /// Costs per hour in euro.
        /// </summary>
        public string FeeEuroPerHour
            => !double.IsNaN(Tariff.FeeEuroPerHour)
            ? string.Format("{0} {1}", Tariff.FeeEuroPerHour.ToString("0.00"), AppResources.MessageBikesManagementTariffDescriptionEuroPerHour)
            : string.Empty;

        /// <summary>
        /// Costs of the abo per month.
        /// </summary>
        public string AboEuroPerMonth
        => !double.IsNaN(Tariff.AboEuroPerMonth)
            ? string.Format("{0} {1}", Tariff.AboEuroPerMonth.ToString("0.00"), AppResources.MessageBikesManagementTariffDescriptionEuroPerHour)
            : string.Empty;

        /// <summary>
        /// Free use time.
        /// </summary>
        public string FreeTimePerSession
            => Tariff.FreeTimePerSession != TimeSpan.Zero
                   ? string.Format("{0} {1}", Tariff.FreeTimePerSession.TotalHours, AppResources.MessageBikesManagementTariffDescriptionHour)
                   : string.Empty;

        /// <summary>
        /// Max costs per day in euro.
        /// </summary>
        public string MaxFeeEuroPerDay
            => !double.IsNaN(Tariff.FeeEuroPerHour)
            ? string.Format("{0} {1}", Tariff.MaxFeeEuroPerDay.ToString("0.00"), AppResources.MessageBikesManagementMaxFeeEuroPerDay)
            : string.Empty;
    }
}