using System.Collections.Generic;
using Vanguard.Board3D;
using Vanguard.Shared.Protocol;

namespace Vanguard.UI.Overlays
{
    /// <summary>Один тайл в общем списке карт. Закрытые карты не раскрывают printingId.</summary>
    public sealed class CardListEntry
    {
        public CardListEntry(CardView card, bool hidden = false, string label = null)
        {
            Card = card;
            Hidden = hidden;
            Label = label;
        }

        public CardView Card { get; }
        public bool Hidden { get; }
        public string Label { get; }
    }

    /// <summary>Запрос на общий горизонтальный список карт.</summary>
    public sealed class CardListRequest
    {
        public CardListRequest(string title, int player, BoardZone zone)
        {
            Title = title;
            Player = player;
            Zone = zone;
        }

        public string Title { get; }
        public int Player { get; }
        public BoardZone Zone { get; }
        public List<CardListEntry> Entries { get; } = new List<CardListEntry>();
        public string EmptyText { get; set; } = "В этой зоне нет карт.";
    }

    /// <summary>Собирает содержимое зоны для CardListView без раскрытия скрытых данных.</summary>
    public static class CardZoneContent
    {
        public static CardListRequest Build(
            PlayerView player,
            int viewer,
            BoardZone zone)
        {
            var request = new CardListRequest(ZoneTitle(zone, player), player?.Index ?? 0, zone);
            if (player == null)
                return request;

            switch (zone)
            {
                case BoardZone.Hand:
                    if (player.Index == viewer)
                        AddCards(request, player.Hand);
                    else
                        AddHidden(request, player.HandCount, "Закрытая карта");
                    break;

                case BoardZone.Deck:
                    // Порядок колоды не покидает сервер: показываем только закрытые слоты.
                    AddHidden(request, player.DeckCount, "Колода");
                    break;

                case BoardZone.Drop:
                    AddCards(request, player.Drop);
                    break;

                case BoardZone.Soul:
                    AddCards(request, player.Soul);
                    break;

                case BoardZone.Guardian:
                    AddCards(request, player.Guardian);
                    break;

                case BoardZone.Trigger:
                    AddCards(request, player.Trigger);
                    break;

                case BoardZone.Damage:
                    AddDamage(request, player);
                    break;
            }

            return request;
        }

        private static void AddDamage(CardListRequest request, PlayerView player)
        {
            var faceUp = player.FaceUpDamage ?? new List<CardView>();
            for (var i = faceUp.Count - 1; i >= 0; i--)
                request.Entries.Add(new CardListEntry(faceUp[i]));

            for (var i = 0; i < player.FaceDownDamage; i++)
                request.Entries.Add(new CardListEntry(null, true, "Закрытый урон"));
        }

        private static void AddCards(CardListRequest request, List<CardView> cards)
        {
            if (cards == null)
                return;

            for (var i = cards.Count - 1; i >= 0; i--)
                request.Entries.Add(new CardListEntry(cards[i]));
        }

        private static void AddHidden(CardListRequest request, int count, string label)
        {
            for (var i = 0; i < count; i++)
                request.Entries.Add(new CardListEntry(null, true, label));
        }

        private static string ZoneTitle(BoardZone zone, PlayerView player)
        {
            var name = player != null ? player.Name : string.Empty;
            var title = zone switch
            {
                BoardZone.Hand => "Рука",
                BoardZone.Deck => "Колода",
                BoardZone.Drop => "Дроп",
                BoardZone.Soul => "Душа",
                BoardZone.Damage => "Урон",
                BoardZone.Guardian => "Круг защиты",
                BoardZone.Trigger => "Триггер",
                BoardZone.Bind => "Bind",
                BoardZone.GenerationBreak => "G Zone",
                _ => "Зона",
            };

            return string.IsNullOrEmpty(name) ? title : title + " · " + name;
        }
    }
}