using UnityEngine;

namespace KirbyAdventures
{
    /// <summary>
    /// Ensures a single bootstrap exists and builds the Phase A greybox level.
    /// </summary>
    public class GameBootstrap : MonoBehaviour
    {
        static bool _initialized;

        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.AfterSceneLoad)]
        static void AutoBootstrap()
        {
            if (_initialized) return;
            if (FindFirstObjectByType<GameBootstrap>() != null)
            {
                _initialized = true;
                return;
            }

            var go = new GameObject("GameBootstrap");
            go.AddComponent<GameBootstrap>();
            _initialized = true;
        }

        void Awake()
        {
            DontDestroyOnLoad(gameObject);

            if (GameFlow.Instance == null)
            {
                var flowGo = new GameObject("GameFlow");
                flowGo.AddComponent<GameFlow>();
                DontDestroyOnLoad(flowGo);
            }

            if (FindFirstObjectByType<CheckpointSystem>() == null)
            {
                var cp = new GameObject("CheckpointSystem");
                cp.AddComponent<CheckpointSystem>();
                DontDestroyOnLoad(cp);
            }

            BuildUi();
            Level01ForestBuilder.Build();
        }

        void BuildUi()
        {
            var dialogue = DialogueUI.EnsureExists();
            var pause = CreateOverlay("PauseOverlay", "ПАУЗА\nEsc — продолжить", new Color(0f, 0f, 0f, 0.65f));
            pause.SetActive(false);
            var win = CreateOverlay("WinOverlay", "Ворота открыты!\nДеревня ждёт Кирби.\n\nПобеда среза Phase A", new Color(0.05f, 0.2f, 0.1f, 0.8f));
            win.SetActive(false);

            if (GameFlow.Instance != null)
            {
                GameFlow.Instance.SetPauseOverlay(pause);
                GameFlow.Instance.SetWinOverlay(win);
            }

            // silence unused
            _ = dialogue;
        }

        static GameObject CreateOverlay(string name, string text, Color bg)
        {
            var canvasGo = new GameObject(name);
            var canvas = canvasGo.AddComponent<Canvas>();
            canvas.renderMode = RenderMode.ScreenSpaceOverlay;
            canvas.sortingOrder = 100;
            canvasGo.AddComponent<UnityEngine.UI.CanvasScaler>().uiScaleMode =
                UnityEngine.UI.CanvasScaler.ScaleMode.ScaleWithScreenSize;
            canvasGo.AddComponent<UnityEngine.UI.GraphicRaycaster>();
            DontDestroyOnLoad(canvasGo);

            var panel = new GameObject("Panel");
            panel.transform.SetParent(canvasGo.transform, false);
            var img = panel.AddComponent<UnityEngine.UI.Image>();
            img.color = bg;
            var rt = panel.GetComponent<RectTransform>();
            rt.anchorMin = Vector2.zero;
            rt.anchorMax = Vector2.one;
            rt.offsetMin = Vector2.zero;
            rt.offsetMax = Vector2.zero;

            var textGo = new GameObject("Text");
            textGo.transform.SetParent(panel.transform, false);
            var uiText = textGo.AddComponent<UnityEngine.UI.Text>();
            uiText.text = text;
            uiText.alignment = TextAnchor.MiddleCenter;
            uiText.fontSize = 36;
            uiText.color = Color.white;
            uiText.font = Resources.GetBuiltinResource<Font>("LegacyRuntime.ttf");
            if (uiText.font == null)
                uiText.font = Resources.GetBuiltinResource<Font>("Arial.ttf");
            var trt = textGo.GetComponent<RectTransform>();
            trt.anchorMin = new Vector2(0.1f, 0.2f);
            trt.anchorMax = new Vector2(0.9f, 0.8f);
            trt.offsetMin = Vector2.zero;
            trt.offsetMax = Vector2.zero;

            return canvasGo;
        }
    }
}