using System;
using UnityEngine;
using UnityEngine.UI;
using Vanguard.Api.Contracts;

namespace Vanguard.UI.Overlays
{
    /// <summary>Крупная карточка с полным текстом. Для скрытых карт показывает рубашку.</summary>
    public sealed class CardDetailOverlay
    {
        private readonly RectTransform _root;
        private readonly Image _art;
        private readonly Text _name;
        private readonly Text _meta;
        private readonly Text _stats;
        private readonly Text _ability;
        private readonly Func<string, CardCatalogItemDto> _catalog;
        private Action _onBack;

        public CardDetailOverlay(
            Transform parent,
            Func<string, CardCatalogItemDto> catalog)
        {
            _catalog = catalog;

            var prefabRoot = OverlayPrefabs.Instantiate("CardDetailOverlay", parent);
            if (prefabRoot != null)
            {
                _root = prefabRoot;
                _name = _root.Find("CardDetailPanel/Header/Name").GetComponent<Text>();
                _art = _root.Find("CardDetailPanel/Body/Art").GetComponent<Image>();
                _meta = _root.Find("CardDetailPanel/Body/Info/Meta").GetComponent<Text>();
                _stats = _root.Find("CardDetailPanel/Body/Info/Stats").GetComponent<Text>();
                _ability = _root.Find("CardDetailPanel/Body/Info/Ability").GetComponent<Text>();
                WireBack(_root.Find("CardDetailPanel/Header/Back").GetComponent<Button>());
                WireBack(_root.Find("CardDetailPanel/Header/Close").GetComponent<Button>());
                _root.gameObject.SetActive(false);
                return;
            }

            _root = UiKit.CreatePanel(parent, "CardDetailOverlay", new Color(0f, 0f, 0f, 0.82f));
            var panel = UiKit.CreateCenteredCard(
                _root,
                "CardDetailPanel",
                new Vector2(900f, 600f),
                new Color(0.045f, 0.06f, 0.09f, 1f));
            UiKit.AddVerticalLayout(panel, 16, 10);

            var header = UiKit.CreatePanel(panel, "Header", Color.clear);
            UiKit.AddHorizontalLayout(header, 0, 10);
            UiKit.SetPreferredHeight(header, 44f);

            _name = UiKit.CreateText(header, "Name", "Карта", 24, Color.white, TextAnchor.MiddleLeft);
            _name.fontStyle = FontStyle.Bold;
            UiKit.MakeLiteral(_name);
            UiKit.SetPreferredHeight(_name, 44f);

            var back = UiKit.CreateButton(header, "Back", "Назад", null, 16);
            var backElement = UiKit.SetPreferredHeight(back, 40f, 0f);
            backElement.preferredWidth = 110f;
            WireBack(back);

            var close = UiKit.CreateButton(header, "Close", "Закрыть", null, 16);
            var closeElement = UiKit.SetPreferredHeight(close, 40f, 0f);
            closeElement.preferredWidth = 110f;
            WireBack(close);

            var body = UiKit.CreatePanel(panel, "Body", Color.clear);
            var bodyElement = body.gameObject.AddComponent<LayoutElement>();
            bodyElement.flexibleHeight = 1f;
            bodyElement.minHeight = 500f;
            UiKit.AddHorizontalLayout(body, 0, 16);

            var artPanel = UiKit.CreatePanel(body, "Art", Color.white);
            var artElement = artPanel.gameObject.AddComponent<LayoutElement>();
            artElement.preferredWidth = 300f;
            artElement.preferredHeight = 460f;
            artElement.flexibleWidth = 0f;
            _art = artPanel.GetComponent<Image>();
            _art.raycastTarget = false;

            var info = UiKit.CreatePanel(body, "Info", Color.clear);
            var infoElement = info.gameObject.AddComponent<LayoutElement>();
            infoElement.flexibleWidth = 1f;
            infoElement.flexibleHeight = 1f;
            UiKit.AddVerticalLayout(info, 0, 6);

            _meta = UiKit.CreateText(info, "Meta", string.Empty, 15, new Color(0.72f, 0.80f, 0.94f), TextAnchor.UpperLeft);
            _meta.horizontalOverflow = HorizontalWrapMode.Wrap;
            UiKit.MakeLiteral(_meta);
            UiKit.SetPreferredHeight(_meta, 52f);

            _stats = UiKit.CreateText(info, "Stats", string.Empty, 17, Color.white, TextAnchor.UpperLeft);
            _stats.fontStyle = FontStyle.Bold;
            UiKit.MakeLiteral(_stats);
            UiKit.SetPreferredHeight(_stats, 40f);

            _ability = UiKit.CreateText(info, "Ability", string.Empty, 15, Color.white, TextAnchor.UpperLeft);
            _ability.horizontalOverflow = HorizontalWrapMode.Wrap;
            _ability.verticalOverflow = VerticalWrapMode.Overflow;
            UiKit.MakeLiteral(_ability);
            UiKit.SetPreferredHeight(_ability, 300f);

            _root.gameObject.SetActive(false);
        }

        public bool IsVisible => _root.gameObject.activeSelf;

        public RectTransform Root => _root;

        private void WireBack(Button button)
        {
            if (button != null)
                button.onClick.AddListener(() => _onBack?.Invoke());
        }

        public void Show(CardListEntry entry, Action onBack)
        {
            _onBack = onBack;
            var card = entry.Card;
            var meta = card != null ? _catalog?.Invoke(card.PrintingId) : null;

            if (entry.Hidden || card == null)
            {
                _art.sprite = CardArt.Back;
                _art.color = Color.white;
                _name.text = entry.Label ?? "Закрытая карта";
                _meta.text = "Содержимое этой карты скрыто.";
                _stats.text = string.Empty;
                _ability.text = string.Empty;
            }
            else
            {
                CardImageService.Apply(
                    _art,
                    meta != null ? meta.ImageKey : null,
                    CardArt.ForCard(
                        meta != null ? meta.NameId : card.PrintingId,
                        meta != null ? meta.Clan : "None"));
                _name.text = meta != null ? Loc.CardName(meta) : card.PrintingId;
                _meta.text = meta != null
                    ? meta.Clan + "  ·  " + meta.Type + "  ·  G" + meta.Grade
                        + (string.IsNullOrEmpty(meta.Trigger) || meta.Trigger == "None"
                            ? string.Empty
                            : "  ·  " + meta.Trigger)
                    : string.Empty;
                _stats.text = "P " + card.Power
                    + "   ·   Shield " + (meta != null ? meta.Shield : 0)
                    + "   ·   C " + card.Critical;
                _ability.text = meta != null ? Loc.CardText(meta) : string.Empty;
            }

            _root.SetAsLastSibling();
            _root.gameObject.SetActive(true);
        }

        public void Hide()
        {
            _root.gameObject.SetActive(false);
        }
    }
}