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

namespace Vanguard.UI.Overlays
{
    /// <summary>
    /// Кликабельные блоки зон: рука, колода, дроп, душа, урон, защита, триггер.
    /// Своя панель снизу слева, противника — сверху справа.
    /// </summary>
    public sealed class ZoneBlockStripView
    {
        private static readonly BoardZone[] Zones =
        {
            BoardZone.Hand,
            BoardZone.Deck,
            BoardZone.Drop,
            BoardZone.Soul,
            BoardZone.Damage,
            BoardZone.Guardian,
            BoardZone.Trigger,
        };

        private readonly Dictionary<BoardZone, Text> _labels =
            new Dictionary<BoardZone, Text>();
        private Text _header;

        public RectTransform Root { get; private set; }
        public event Action<BoardZone> ZoneClicked;

        public void Build(
            Transform parent,
            string name,
            Vector2 anchor,
            Vector2 pivot,
            Vector2 position,
            Vector2 size)
        {
            var prefabRoot = OverlayPrefabs.Instantiate("ZoneBlockStrip", parent);
            if (prefabRoot != null)
            {
                Root = prefabRoot;
                Root.name = name;
                ApplyLayout(anchor, pivot, position, size);
                WireButtons();
                return;
            }

            Root = UiKit.CreatePanel(parent, name, new Color(0.02f, 0.035f, 0.055f, 0.82f));
            ApplyLayout(anchor, pivot, position, size);

            UiKit.AddVerticalLayout(Root, 8, 4);

            _header = UiKit.CreateText(
                Root,
                "Header",
                string.Empty,
                14,
                new Color(0.86f, 0.91f, 1f),
                TextAnchor.MiddleLeft);
            _header.fontStyle = FontStyle.Bold;
            UiKit.MakeLiteral(_header);
            UiKit.SetPreferredHeight(_header, 20f);

            CreateRow("Row1");
            CreateRow("Row2");
            CreateZoneButtons();
            WireButtons();
        }

        private void CreateZoneButtons()
        {
            for (var i = 0; i < Zones.Length; i++)
            {
                var zone = Zones[i];
                var row = Root.Find(i < 4 ? "Row1" : "Row2");
                UiKit.CreateButton(
                    row,
                    "Zone_" + zone,
                    string.Empty,
                    null,
                    13);
            }
        }

        private void ApplyLayout(
            Vector2 anchor,
            Vector2 pivot,
            Vector2 position,
            Vector2 size)
        {
            Root.anchorMin = anchor;
            Root.anchorMax = anchor;
            Root.pivot = pivot;
            Root.anchoredPosition = position;
            Root.sizeDelta = size;

            var image = Root.GetComponent<Image>();
            if (image != null)
                image.raycastTarget = false;
        }

        private void WireButtons()
        {
            _header = Root.Find("Header")?.GetComponent<Text>();
            if (_header != null)
            {
                _header.fontStyle = FontStyle.Bold;
                UiKit.MakeLiteral(_header);
            }

            for (var i = 0; i < Zones.Length; i++)
            {
                var zone = Zones[i];
                var row = i < 4 ? "Row1" : "Row2";
                var button = Root.Find(row + "/Zone_" + zone)?.GetComponent<Button>();
                if (button == null)
                    continue;

                var element = button.GetComponent<LayoutElement>();
                if (element == null)
                    element = button.gameObject.AddComponent<LayoutElement>();
                element.preferredHeight = 32f;
                element.preferredWidth = i < 4 ? 80f : 108f;

                _labels[zone] = button.GetComponentInChildren<Text>();
                if (_labels[zone] != null)
                    UiKit.MakeLiteral(_labels[zone]);

                button.onClick.AddListener(() => ZoneClicked?.Invoke(zone));
            }
        }

        public void Update(PlayerView player, bool self)
        {
            if (Root == null)
                return;

            _header.text = Loc.Translate(self ? "ВЫ" : "ПРОТИВНИК")
                + (player != null && !string.IsNullOrEmpty(player.Name)
                    ? " · " + player.Name
                    : string.Empty);

            var hand = player != null
                ? Mathf.Max(player.HandCount, player.Hand?.Count ?? 0)
                : 0;
            var deck = player?.DeckCount ?? 0;
            var drop = player?.Drop?.Count ?? 0;
            var soul = player?.Soul?.Count ?? 0;
            var damage = player != null
                ? player.FaceDownDamage + (player.FaceUpDamage?.Count ?? 0)
                : 0;
            var guardian = player?.Guardian?.Count ?? 0;
            var trigger = player?.Trigger?.Count ?? 0;

            Set(BoardZone.Hand, "Рука", hand);
            Set(BoardZone.Deck, "Колода", deck);
            Set(BoardZone.Drop, "Дроп", drop);
            Set(BoardZone.Soul, "Душа", soul);
            Set(BoardZone.Damage, "Урон", damage);
            Set(BoardZone.Guardian, "Защита", guardian);
            Set(BoardZone.Trigger, "Триг.", trigger);
        }

        private RectTransform CreateRow(string name)
        {
            var row = UiKit.CreatePanel(Root, name, Color.clear);
            var element = row.gameObject.AddComponent<LayoutElement>();
            element.preferredHeight = 32f;
            UiKit.AddHorizontalLayout(row, 0, 4);
            return row;
        }

        private void Set(BoardZone zone, string label, int count)
        {
            if (_labels.TryGetValue(zone, out var text) && text != null)
                text.text = Loc.Translate(label) + " " + count;
        }
    }
}