using System;
using System.Collections.Generic;

namespace FasdDesktopUi.Basics.Services.Models
{
    public sealed class TicketOverviewCountsChangedEventArgs : EventArgs
    {
        public TicketOverviewCountsChangedEventArgs(IReadOnlyList<TileCountChange> changes, IReadOnlyDictionary<string, TileCounts> currentCounts, TileScope? initializedScope = null)
        {
            Changes = changes ?? Array.Empty<TileCountChange>();
            CurrentCounts = currentCounts;
            InitializedScope = initializedScope;
        }

        public IReadOnlyList<TileCountChange> Changes { get; }

        public IReadOnlyDictionary<string, TileCounts> CurrentCounts { get; }

        public TileScope? InitializedScope { get; }
    }

    public readonly struct TileCountChange
    {
        public TileCountChange(string key, TileScope scope, int oldCount, int newCount)
        {
            Key = key;
            Scope = scope;
            OldCount = oldCount;
            NewCount = newCount;
        }

        public string Key { get; }

        public TileScope Scope { get; }

        public int OldCount { get; }

        public int NewCount { get; }

        public int Delta => NewCount - OldCount;
    }

    public readonly struct TileCounts
    {
        public static TileCounts Empty => new TileCounts(0, 0);

        public TileCounts(int personal, int role)
        {
            Personal = personal;
            Role = role;
        }

        public int Personal { get; }

        public int Role { get; }
    }

    public enum TileScope
    {
        Personal,
        Role
    }
}