using System.Collections.ObjectModel;
using System.Linq;
using TINK.Model.Bikes.Bike;

namespace TINK.ViewModel.Bikes.Bike
{
    /// <summary>
    /// View model for displaying tariff info.
    /// </summary>
    public class TariffDescriptionViewModel
    {
        private const string AGBKEY = "AGB";

        public TariffDescriptionViewModel(RentalDescription tariff)
        {
            Name = tariff?.Name ?? string.Empty;

            TariffEntries = tariff != null && tariff?.TariffEntries != null
                ? new ObservableCollection<RentalDescription.TariffElement>(tariff.TariffEntries.OrderBy(x => x.Key).Select(x => x.Value))
                : new ObservableCollection<RentalDescription.TariffElement>();

            InfoEntries = tariff != null && tariff?.InfoEntries != null
                ? new ObservableCollection<string>(tariff.InfoEntries.OrderBy(x => x.Key).Where(x => x.Value.Key != AGBKEY).Select(x => x.Value.Value))
                : new ObservableCollection<string>();

            OperatorAgb = tariff?.InfoEntries != null 
                && tariff.InfoEntries.Select(x => x.Value.Key).Contains(AGBKEY)
                ? tariff?.InfoEntries.FirstOrDefault(x => x.Value.Key == AGBKEY).Value.Value
                : string.Empty;
        }

        /// <summary>
        /// Holds the name of the tariff.
        /// </summary>
        public string Name { get; set; }

        /// <summary>
        /// Holds the tariff entries to display.
        /// </summary>
        public ObservableCollection<RentalDescription.TariffElement> TariffEntries { get; private set; }

        /// <summary>
        /// Holds the info entries to display.
        /// </summary>
        public ObservableCollection<string> InfoEntries { get; private set; }

        /// <summary> Info about operator agb as HTML (i.g. text and hyperlink). </summary>
        public string OperatorAgb { get; set; }

        public RentalDescription.TariffElement TarifEntry1 => TariffEntries.Count > 0 ? TariffEntries[0] : new RentalDescription.TariffElement();
        public RentalDescription.TariffElement TarifEntry2 => TariffEntries.Count > 1 ? TariffEntries[1] : new RentalDescription.TariffElement();
        public RentalDescription.TariffElement TarifEntry3 => TariffEntries.Count > 2 ? TariffEntries[2] : new RentalDescription.TariffElement();
        public RentalDescription.TariffElement TarifEntry4 => TariffEntries.Count > 3 ? TariffEntries[3] : new RentalDescription.TariffElement();

        public RentalDescription.TariffElement TarifEntry5 => TariffEntries.Count > 4 ? TariffEntries[4] : new RentalDescription.TariffElement();
        public RentalDescription.TariffElement TarifEntry6 => TariffEntries.Count > 5 ? TariffEntries[5] : new RentalDescription.TariffElement();
        public RentalDescription.TariffElement TarifEntry7 => TariffEntries.Count > 6 ? TariffEntries[6] : new RentalDescription.TariffElement();
        public RentalDescription.TariffElement TarifEntry8 => TariffEntries.Count > 7 ? TariffEntries[7] : new RentalDescription.TariffElement();
        public RentalDescription.TariffElement TarifEntry9 => TariffEntries.Count > 8 ? TariffEntries[8] : new RentalDescription.TariffElement();

        public string InfoEntry1 => InfoEntries.Count > 0 ? InfoEntries[0] : string.Empty;
        public string InfoEntry2 => InfoEntries.Count > 1 ? InfoEntries[1] : string.Empty;
        public string InfoEntry3 => InfoEntries.Count > 2 ? InfoEntries[2] : string.Empty;
        public string InfoEntry4 => InfoEntries.Count > 3 ? InfoEntries[3] : string.Empty;
        public string InfoEntry5 => InfoEntries.Count > 4 ? InfoEntries[4] : string.Empty;
    }
}