using UnityEditor;
using UnityEngine;
using UnityEngine.SceneManagement;
using Core.Lifecycle;
using Core.SaveLoad;
using AppleHills.Core.Settings;
using Bootstrap;

namespace Editor.Lifecycle
{
    /// <summary>
    /// Editor-only bootstrap that ensures OnSceneReady is triggered when playing directly from a scene in Unity Editor.
    /// 
    /// PROBLEM: When you press Play in the editor without going through the scene manager:
    /// - CustomBoot runs and triggers OnBootCompletionTriggered (which broadcasts OnManagedAwake)
    /// - But BroadcastSceneReady is NEVER called for the initial scene
    /// - Components in the scene never receive their OnSceneReady() callback
    /// 
    /// SOLUTION: After boot completes, detect the active scene and broadcast OnSceneReady for it.
    /// This only runs in editor mode and mimics what SceneManagerService does during normal scene transitions.
    /// </summary>
    [InitializeOnLoad]
    public static class EditorLifecycleBootstrap
    {
        private static bool hasTriggeredInitialSceneReady = false;
        private static int framesSincePlayMode = 0;
        private const int MaxFramesToWait = 300; // 5 seconds at 60fps

        static EditorLifecycleBootstrap()
        {
            // Subscribe to play mode state changes
            EditorApplication.playModeStateChanged += OnPlayModeStateChanged;
        }

        private static void OnPlayModeStateChanged(PlayModeStateChange state)
        {
            // Reset flag when exiting play mode
            if (state == PlayModeStateChange.ExitingPlayMode || state == PlayModeStateChange.EnteredEditMode)
            {
                hasTriggeredInitialSceneReady = false;
                framesSincePlayMode = 0;
                return;
            }

            // When we enter play mode, wait for boot to complete then trigger scene ready
            if (state == PlayModeStateChange.EnteredPlayMode)
            {
                hasTriggeredInitialSceneReady = false;
                framesSincePlayMode = 0;
                
                // Use EditorApplication.update to poll until boot completes
                EditorApplication.update += WaitForBootAndTriggerSceneReady;
            }
        }

        private static void WaitForBootAndTriggerSceneReady()
        {
            framesSincePlayMode++;
            
            // Safety timeout - if boot hasn't completed after 5 seconds, something is wrong
            if (framesSincePlayMode > MaxFramesToWait)
            {
                Debug.LogError($"[EditorLifecycleBootstrap] Timed out waiting for boot completion after {MaxFramesToWait} frames. " +
                              "CustomBoot may have failed to initialize properly.");
                EditorApplication.update -= WaitForBootAndTriggerSceneReady;
                return;
            }
            
            // Check if boot has completed
            if (!CustomBoot.Initialised)
                return;

            // Check if LifecycleManager exists
            if (LifecycleManager.Instance == null)
            {
                Debug.LogWarning("[EditorLifecycleBootstrap] LifecycleManager instance not found. " +
                               "Lifecycle may not be properly initialized.");
                EditorApplication.update -= WaitForBootAndTriggerSceneReady;
                return;
            }

            // Only trigger once per play session
            if (hasTriggeredInitialSceneReady)
            {
                EditorApplication.update -= WaitForBootAndTriggerSceneReady;
                return;
            }

            hasTriggeredInitialSceneReady = true;
            EditorApplication.update -= WaitForBootAndTriggerSceneReady;

            // Get the active scene
            Scene activeScene = SceneManager.GetActiveScene();
            
            if (!activeScene.isLoaded)
            {
                Debug.LogWarning($"[EditorLifecycleBootstrap] Active scene '{activeScene.name}' is not loaded.");
                return;
            }

            // Skip bootstrap scene - it doesn't need scene ready
            // Note: BootstrapScene is the infrastructure scene, not a gameplay scene
            if (activeScene.name == "BootstrapScene" || activeScene.name == "Bootstrap")
            {
                Debug.Log($"[EditorLifecycleBootstrap] Skipping OnSceneReady for infrastructure scene: {activeScene.name}");
                return;
            }

            Debug.Log($"<color=cyan>[EditorLifecycleBootstrap] Triggering lifecycle for initial scene: {activeScene.name}</color>");
            
            // Broadcast scene ready for the initial scene
            // This mimics what SceneManagerService does during scene transitions (Phase 10)
            try
            {
                LifecycleManager.Instance.BroadcastSceneReady(activeScene.name);
            }
            catch (System.Exception ex)
            {
                Debug.LogError($"[EditorLifecycleBootstrap] Error broadcasting SceneReady: {ex.Message}\n{ex.StackTrace}");
                return;
            }
            
            // Restore scene-specific data via SaveLoadManager
            // This mimics SceneManagerService Phase 11
            if (SaveLoadManager.Instance != null)
            {
                var debugSettings = DeveloperSettingsProvider.Instance.GetSettings<DebugSettings>();
                if (debugSettings.useSaveLoadSystem)
                {
                    try
                    {
                        Debug.Log($"[EditorLifecycleBootstrap] Restoring scene data for: {activeScene.name}");
                        SaveLoadManager.Instance.RestoreSceneData();
                    }
                    catch (System.Exception ex)
                    {
                        Debug.LogError($"[EditorLifecycleBootstrap] Error restoring scene data: {ex.Message}\n{ex.StackTrace}");
                    }
                }
            }
        }
    }
}