using System.IO;
using UnityEditor;
using UnityEngine;
using UnityEngine.EventSystems;
using Vanguard.UI;
using Vanguard.UI.Overlays;

namespace Vanguard.Editor
{
    /// <summary>
    /// Собирает статические части overlay-экранов в prefab-ассеты.
    /// Runtime использует их через Resources/Overlays, если они есть.
    /// </summary>
    public static class OverlayPrefabBuilder
    {
        private const string DirectoryPath = "Assets/Vanguard/Resources/Overlays";

        [MenuItem("Vanguard/Rebuild Overlay Prefabs")]
        public static void BuildOverlayPrefabs()
        {
            Directory.CreateDirectory(DirectoryPath);
            AssetDatabase.Refresh();

            OverlayPrefabs.Disabled = true;
            var hadEventSystem = Object.FindAnyObjectByType<EventSystem>() != null;
            var canvas = UiKit.CreateCanvas("Overlay Prefab Canvas");
            try
            {
                var list = new CardListView(canvas.transform, _ => null);
                Save(list.Root, "CardListView");

                var detail = new CardDetailOverlay(canvas.transform, _ => null);
                Save(detail.Root, "CardDetailOverlay");

                var menu = new CardActionMenuView();
                menu.Build(canvas.transform);
                Save(menu.Root, "CardActionMenu");

                var zones = new ZoneBlockStripView();
                zones.Build(
                    canvas.transform,
                    "ZoneBlockStrip",
                    new Vector2(0f, 0f),
                    new Vector2(0f, 0f),
                    Vector2.zero,
                    new Vector2(360f, 108f));
                Save(zones.Root, "ZoneBlockStrip");
            }
            finally
            {
                OverlayPrefabs.Disabled = false;
                Object.DestroyImmediate(canvas.gameObject);
                if (!hadEventSystem)
                {
                    var eventSystem = Object.FindAnyObjectByType<EventSystem>();
                    if (eventSystem != null)
                        Object.DestroyImmediate(eventSystem.gameObject);
                }

                AssetDatabase.SaveAssets();
                AssetDatabase.Refresh();
            }

            Debug.Log("Vanguard overlay prefabs rebuilt: " + DirectoryPath);
        }

        private static void Save(RectTransform root, string name)
        {
            if (root == null)
                return;

            var path = DirectoryPath + "/" + name + ".prefab";
            root.gameObject.SetActive(true);
            PrefabUtility.SaveAsPrefabAsset(root.gameObject, path);
        }
    }
}