using UnityEngine;
using UnityEditor;
using UnityEditor.SceneManagement;
using UnityEngine.SceneManagement;
using System;
using System.Collections.Generic;
using System.IO;
using Interactions;

namespace Editor
{
    public class RemoveInteractableBaseComponents : EditorWindow
    {
        private List<string> problematicPrefabs = new List<string>();
        private List<string> problematicScenes = new List<string>();
        private Vector2 scrollPosition;
        private bool hasScanned;
        private int componentsFound;

        [MenuItem("AppleHills/Remove InteractableBase Components")]
        public static void ShowWindow()
        {
            var window = GetWindow<RemoveInteractableBaseComponents>("Remove InteractableBase");
            window.minSize = new Vector2(700, 500);
        }

        private void OnGUI()
        {
            GUILayout.Label("Remove InteractableBase Component References", EditorStyles.boldLabel);
            
            EditorGUILayout.HelpBox(
                "This tool finds and removes EXACT InteractableBase components from prefabs and scenes.\n\n" +
                "Only finds the bare base class, NOT derived types like Pickup/ItemSlot/OneClickInteraction.\n\n" +
                "If components depend on InteractableBase, you'll be prompted to replace it.",
                MessageType.Info);

            EditorGUILayout.Space();

            if (GUILayout.Button("Scan All Prefabs and Scenes", GUILayout.Height(35)))
            {
                ScanAll();
            }

            EditorGUILayout.Space();

            if (hasScanned)
            {
                EditorGUILayout.LabelField($"Found {componentsFound} exact InteractableBase components", EditorStyles.boldLabel);
                EditorGUILayout.LabelField($"In {problematicPrefabs.Count} prefabs");
                EditorGUILayout.LabelField($"In {problematicScenes.Count} scenes");

                if (componentsFound > 0)
                {
                    EditorGUILayout.Space();
                    
                    EditorGUILayout.BeginHorizontal();
                    
                    if (problematicPrefabs.Count > 0 && GUILayout.Button($"Remove from Prefabs ({problematicPrefabs.Count})", GUILayout.Height(35)))
                    {
                        RemoveFromAllPrefabs();
                    }
                    
                    if (problematicScenes.Count > 0 && GUILayout.Button($"Remove from Scenes ({problematicScenes.Count})", GUILayout.Height(35)))
                    {
                        RemoveFromAllScenes();
                    }
                    
                    EditorGUILayout.EndHorizontal();
                    
                    EditorGUILayout.Space();
                    
                    if (GUILayout.Button("Remove All (Prefabs + Scenes)", GUILayout.Height(35)))
                    {
                        RemoveAll();
                    }

                    EditorGUILayout.Space();

                    scrollPosition = EditorGUILayout.BeginScrollView(scrollPosition);
                    
                    if (problematicPrefabs.Count > 0)
                    {
                        EditorGUILayout.LabelField("Prefabs:", EditorStyles.boldLabel);
                        foreach (var prefabPath in problematicPrefabs)
                        {
                            EditorGUILayout.BeginHorizontal("box");
                            EditorGUILayout.LabelField(prefabPath);
                            if (GUILayout.Button("Remove", GUILayout.Width(80)))
                            {
                                RemoveFromPrefab(prefabPath);
                            }
                            EditorGUILayout.EndHorizontal();
                        }
                        EditorGUILayout.Space();
                    }
                    
                    if (problematicScenes.Count > 0)
                    {
                        EditorGUILayout.LabelField("Scenes:", EditorStyles.boldLabel);
                        foreach (var scenePath in problematicScenes)
                        {
                            EditorGUILayout.BeginHorizontal("box");
                            EditorGUILayout.LabelField(scenePath);
                            if (GUILayout.Button("Remove", GUILayout.Width(80)))
                            {
                                RemoveFromScene(scenePath);
                            }
                            EditorGUILayout.EndHorizontal();
                        }
                    }
                    
                    EditorGUILayout.EndScrollView();
                }
                else
                {
                    EditorGUILayout.HelpBox("No exact InteractableBase components found! All clean.", MessageType.Info);
                }
            }
        }

        private void ScanAll()
        {
            problematicPrefabs.Clear();
            problematicScenes.Clear();
            componentsFound = 0;
            hasScanned = true;

            ScanPrefabs();
            ScanScenes();

            Debug.Log($"<color=cyan>[Scan Complete]</color> Found {componentsFound} exact InteractableBase components in {problematicPrefabs.Count} prefabs and {problematicScenes.Count} scenes.");
        }

        private void ScanPrefabs()
        {
            string[] prefabGuids = AssetDatabase.FindAssets("t:Prefab", new[] { "Assets" });
            
            EditorUtility.DisplayProgressBar("Scanning Prefabs", "Starting...", 0f);

            for (int i = 0; i < prefabGuids.Length; i++)
            {
                string path = AssetDatabase.GUIDToAssetPath(prefabGuids[i]);
                
                EditorUtility.DisplayProgressBar("Scanning Prefabs", 
                    $"Checking {i + 1}/{prefabGuids.Length}: {Path.GetFileName(path)}", 
                    (float)i / prefabGuids.Length);

                GameObject prefab = AssetDatabase.LoadAssetAtPath<GameObject>(path);
                if (prefab != null)
                {
                    // Check if this prefab or any of its children have EXACTLY InteractableBase (not derived types)
                    InteractableBase[] components = prefab.GetComponentsInChildren<InteractableBase>(true);
                    int exactMatches = 0;
                    foreach (var component in components)
                    {
                        if (component != null && component.GetType() == typeof(InteractableBase))
                        {
                            exactMatches++;
                        }
                    }
                    
                    if (exactMatches > 0)
                    {
                        problematicPrefabs.Add(path);
                        componentsFound += exactMatches;
                    }
                }
            }

            EditorUtility.ClearProgressBar();
        }

        private void ScanScenes()
        {
            string[] sceneGuids = AssetDatabase.FindAssets("t:Scene", new[] { "Assets/Scenes" });
            
            EditorUtility.DisplayProgressBar("Scanning Scenes", "Starting...", 0f);

            string currentScenePath = SceneManager.GetActiveScene().path;

            for (int i = 0; i < sceneGuids.Length; i++)
            {
                string path = AssetDatabase.GUIDToAssetPath(sceneGuids[i]);
                
                EditorUtility.DisplayProgressBar("Scanning Scenes", 
                    $"Checking {i + 1}/{sceneGuids.Length}: {Path.GetFileName(path)}", 
                    (float)i / sceneGuids.Length);

                EditorSceneManager.OpenScene(path, OpenSceneMode.Single);
                
                // Find all InteractableBase components in the scene
                InteractableBase[] components = GameObject.FindObjectsByType<InteractableBase>(FindObjectsSortMode.None);
                
                int exactMatches = 0;
                foreach (var component in components)
                {
                    if (component != null && component.GetType() == typeof(InteractableBase))
                    {
                        exactMatches++;
                    }
                }
                
                if (exactMatches > 0)
                {
                    problematicScenes.Add(path);
                    componentsFound += exactMatches;
                }
            }

            // Restore original scene
            if (!string.IsNullOrEmpty(currentScenePath))
            {
                EditorSceneManager.OpenScene(currentScenePath);
            }

            EditorUtility.ClearProgressBar();
        }

        private void RemoveFromAllPrefabs()
        {
            if (!EditorUtility.DisplayDialog("Confirm Removal", 
                $"This will remove InteractableBase components from {problematicPrefabs.Count} prefabs.\n\n" +
                "This cannot be undone (unless you use version control).\n\nContinue?", 
                "Yes, Remove", "Cancel"))
            {
                return;
            }

            int removedCount = 0;

            for (int i = 0; i < problematicPrefabs.Count; i++)
            {
                string path = problematicPrefabs[i];
                
                EditorUtility.DisplayProgressBar("Removing Components from Prefabs", 
                    $"Processing {i + 1}/{problematicPrefabs.Count}: {Path.GetFileName(path)}", 
                    (float)i / problematicPrefabs.Count);

                removedCount += RemoveFromPrefab(path);
            }

            EditorUtility.ClearProgressBar();
            AssetDatabase.SaveAssets();
            AssetDatabase.Refresh();

            Debug.Log($"<color=green>[Prefab Cleanup Complete]</color> Removed {removedCount} InteractableBase components from prefabs.");
            
            ScanAll();
        }

        private void RemoveFromAllScenes()
        {
            if (!EditorUtility.DisplayDialog("Confirm Removal", 
                $"This will remove InteractableBase components from {problematicScenes.Count} scenes.\n\n" +
                "This cannot be undone (unless you use version control).\n\nContinue?", 
                "Yes, Remove", "Cancel"))
            {
                return;
            }

            int removedCount = 0;
            string currentScenePath = SceneManager.GetActiveScene().path;
            
            for (int i = 0; i < problematicScenes.Count; i++)
            {
                string path = problematicScenes[i];
                
                EditorUtility.DisplayProgressBar("Removing Components from Scenes", 
                    $"Processing {i + 1}/{problematicScenes.Count}: {Path.GetFileName(path)}", 
                    (float)i / problematicScenes.Count);

                removedCount += RemoveFromScene(path);
            }

            // Restore original scene
            if (!string.IsNullOrEmpty(currentScenePath))
            {
                EditorSceneManager.OpenScene(currentScenePath);
            }

            EditorUtility.ClearProgressBar();
            AssetDatabase.SaveAssets();
            AssetDatabase.Refresh();

            Debug.Log($"<color=green>[Scene Cleanup Complete]</color> Removed {removedCount} InteractableBase components from scenes.");
            
            ScanAll();
        }

        private void RemoveAll()
        {
            if (!EditorUtility.DisplayDialog("Confirm Removal", 
                $"This will remove {componentsFound} InteractableBase components from:\n" +
                $"• {problematicPrefabs.Count} prefabs\n" +
                $"• {problematicScenes.Count} scenes\n\n" +
                "This cannot be undone (unless you use version control).\n\nContinue?", 
                "Yes, Remove", "Cancel"))
            {
                return;
            }

            int removedCount = 0;

            // Remove from prefabs
            for (int i = 0; i < problematicPrefabs.Count; i++)
            {
                string path = problematicPrefabs[i];
                
                EditorUtility.DisplayProgressBar("Removing Components", 
                    $"Prefabs {i + 1}/{problematicPrefabs.Count}: {Path.GetFileName(path)}", 
                    (float)i / (problematicPrefabs.Count + problematicScenes.Count));

                removedCount += RemoveFromPrefab(path);
            }

            // Remove from scenes
            string currentScenePath = SceneManager.GetActiveScene().path;
            
            for (int i = 0; i < problematicScenes.Count; i++)
            {
                string path = problematicScenes[i];
                
                EditorUtility.DisplayProgressBar("Removing Components", 
                    $"Scenes {i + 1}/{problematicScenes.Count}: {Path.GetFileName(path)}", 
                    (float)(problematicPrefabs.Count + i) / (problematicPrefabs.Count + problematicScenes.Count));

                removedCount += RemoveFromScene(path);
            }

            // Restore original scene
            if (!string.IsNullOrEmpty(currentScenePath))
            {
                EditorSceneManager.OpenScene(currentScenePath);
            }

            EditorUtility.ClearProgressBar();
            AssetDatabase.SaveAssets();
            AssetDatabase.Refresh();

            Debug.Log($"<color=green>[Removal Complete]</color> Removed {removedCount} InteractableBase components.");
            
            ScanAll();
        }

        private int RemoveFromPrefab(string assetPath)
        {
            int removed = 0;
            
            try
            {
                GameObject prefab = AssetDatabase.LoadAssetAtPath<GameObject>(assetPath);
                if (prefab == null)
                {
                    Debug.LogWarning($"Could not load prefab at path: {assetPath}");
                    return 0;
                }

                string prefabPath = AssetDatabase.GetAssetPath(prefab);
                GameObject prefabContents = null;
                
                try
                {
                    prefabContents = PrefabUtility.LoadPrefabContents(prefabPath);
                }
                catch (Exception loadEx)
                {
                    Debug.LogError($"Failed to load prefab contents for {assetPath}: {loadEx.Message}");
                    return 0;
                }

                if (prefabContents == null)
                {
                    Debug.LogWarning($"Prefab contents are null for: {assetPath}");
                    return 0;
                }

                InteractableBase[] components = prefabContents.GetComponentsInChildren<InteractableBase>(true);
                
                if (components == null || components.Length == 0)
                {
                    PrefabUtility.UnloadPrefabContents(prefabContents);
                    return 0;
                }
                
                foreach (var component in components)
                {
                    if (component == null)
                        continue;
                    
                    // Check if it's EXACTLY InteractableBase (not a derived type)
                    if (component.GetType() == typeof(InteractableBase))
                    {
                        // Cache references before destroying
                        GameObject targetObject = component.gameObject;
                        string objectName = targetObject != null ? targetObject.name : "Unknown";
                        
                        // Check if GameObject already has a derived InteractableBase type
                        bool hasPickup = targetObject.GetComponent<Pickup>() != null;
                        bool hasItemSlot = targetObject.GetComponent<ItemSlot>() != null;
                        bool hasOneClick = targetObject.GetComponent<OneClickInteraction>() != null;
                        
                        if (hasPickup || hasItemSlot || hasOneClick)
                        {
                            // GameObject already has a concrete type, safe to remove bare base class
                            DestroyImmediate(component);
                            removed++;
                            string existingType = hasItemSlot ? "ItemSlot" : (hasPickup ? "Pickup" : "OneClickInteraction");
                            Debug.Log($"<color=green>[Removed]</color> Bare InteractableBase from '{objectName}' (already has {existingType}) in prefab '{Path.GetFileName(assetPath)}'");
                            continue;
                        }
                        
                        // Check what other components depend on InteractableBase
                        Component[] allComponents = targetObject.GetComponents<Component>();
                        List<string> dependentComponents = new List<string>();
                        
                        foreach (var otherComponent in allComponents)
                        {
                            if (otherComponent == null || otherComponent == component)
                                continue;
                            
                            var requireAttributes = otherComponent.GetType().GetCustomAttributes(typeof(RequireComponent), true);
                            foreach (RequireComponent attr in requireAttributes)
                            {
                                if (attr.m_Type0 == typeof(InteractableBase) || 
                                    attr.m_Type1 == typeof(InteractableBase) || 
                                    attr.m_Type2 == typeof(InteractableBase))
                                {
                                    dependentComponents.Add(otherComponent.GetType().Name);
                                }
                            }
                        }
                        
                        if (dependentComponents.Count > 0)
                        {
                            string dependencyList = string.Join(", ", dependentComponents);
                            string message = $"GameObject '{objectName}' in prefab '{Path.GetFileName(assetPath)}' has InteractableBase, " +
                                           $"but these components depend on it:\n\n{dependencyList}\n\n" +
                                           "Replace InteractableBase with:";
                            
                            int choice = EditorUtility.DisplayDialogComplex(
                                "Component Dependency Detected",
                                message,
                                "Pickup",
                                "ItemSlot", 
                                "OneClickInteraction");
                            
                            Type replacementType = choice switch
                            {
                                0 => typeof(Pickup),
                                1 => typeof(ItemSlot),
                                2 => typeof(OneClickInteraction),
                                _ => null
                            };
                            
                            if (replacementType != null)
                            {
                                // Cache component data before destroying
                                bool isOneTime = component.isOneTime;
                                float cooldown = component.cooldown;
                                CharacterToInteract characterToInteract = component.characterToInteract;
                                
                                DestroyImmediate(component);
                                
                                var newComponent = targetObject.AddComponent(replacementType) as InteractableBase;
                                if (newComponent != null)
                                {
                                    newComponent.isOneTime = isOneTime;
                                    newComponent.cooldown = cooldown;
                                    newComponent.characterToInteract = characterToInteract;
                                    
                                    removed++;
                                    Debug.Log($"<color=cyan>[Replaced]</color> InteractableBase with {replacementType.Name} on '{objectName}' in prefab '{Path.GetFileName(assetPath)}'");
                                }
                            }
                            else
                            {
                                Debug.LogWarning($"Skipped removing InteractableBase from '{objectName}' - no replacement chosen");
                            }
                        }
                        else
                        {
                            DestroyImmediate(component);
                            removed++;
                            Debug.Log($"<color=yellow>[Removed]</color> InteractableBase from '{objectName}' in prefab '{Path.GetFileName(assetPath)}'");
                        }
                    }
                }

                if (removed > 0)
                {
                    try
                    {
                        PrefabUtility.SaveAsPrefabAsset(prefabContents, prefabPath);
                    }
                    catch (Exception saveEx)
                    {
                        Debug.LogError($"Failed to save prefab {assetPath}: {saveEx.Message}");
                    }
                }

                PrefabUtility.UnloadPrefabContents(prefabContents);
            }
            catch (Exception ex)
            {
                Debug.LogError($"Error removing components from prefab {assetPath}: {ex.Message}\nStack: {ex.StackTrace}");
            }

            return removed;
        }

        private int RemoveFromScene(string scenePath)
        {
            int removed = 0;
            
            try
            {
                Scene scene = EditorSceneManager.OpenScene(scenePath, OpenSceneMode.Single);
                
                if (!scene.isLoaded)
                {
                    Debug.LogWarning($"Scene not loaded: {scenePath}");
                    return 0;
                }
                
                InteractableBase[] components = GameObject.FindObjectsByType<InteractableBase>(FindObjectsSortMode.None);
                
                if (components == null || components.Length == 0)
                {
                    return 0;
                }
                
                foreach (var component in components)
                {
                    if (component == null)
                        continue;
                    
                    if (component.GetType() == typeof(InteractableBase))
                    {
                        // Cache references before destroying
                        GameObject targetObject = component.gameObject;
                        string objectName = targetObject != null ? targetObject.name : "Unknown";
                        
                        // Check if GameObject already has a derived InteractableBase type
                        bool hasPickup = targetObject.GetComponent<Pickup>() != null;
                        bool hasItemSlot = targetObject.GetComponent<ItemSlot>() != null;
                        bool hasOneClick = targetObject.GetComponent<OneClickInteraction>() != null;
                        
                        if (hasPickup || hasItemSlot || hasOneClick)
                        {
                            // GameObject already has a concrete type, safe to remove bare base class
                            DestroyImmediate(component);
                            removed++;
                            string existingType = hasItemSlot ? "ItemSlot" : (hasPickup ? "Pickup" : "OneClickInteraction");
                            Debug.Log($"<color=green>[Removed]</color> Bare InteractableBase from '{objectName}' (already has {existingType}) in scene '{Path.GetFileName(scenePath)}'");
                            continue;
                        }
                        
                        Component[] allComponents = targetObject.GetComponents<Component>();
                        List<string> dependentComponents = new List<string>();
                        
                        foreach (var otherComponent in allComponents)
                        {
                            if (otherComponent == null || otherComponent == component)
                                continue;
                            
                            var requireAttributes = otherComponent.GetType().GetCustomAttributes(typeof(RequireComponent), true);
                            foreach (RequireComponent attr in requireAttributes)
                            {
                                if (attr.m_Type0 == typeof(InteractableBase) || 
                                    attr.m_Type1 == typeof(InteractableBase) || 
                                    attr.m_Type2 == typeof(InteractableBase))
                                {
                                    dependentComponents.Add(otherComponent.GetType().Name);
                                }
                            }
                        }
                        
                        if (dependentComponents.Count > 0)
                        {
                            string dependencyList = string.Join(", ", dependentComponents);
                            string message = $"GameObject '{objectName}' in scene '{Path.GetFileName(scenePath)}' has InteractableBase, " +
                                           $"but these components depend on it:\n\n{dependencyList}\n\n" +
                                           "Replace InteractableBase with:";
                            
                            int choice = EditorUtility.DisplayDialogComplex(
                                "Component Dependency Detected",
                                message,
                                "Pickup",
                                "ItemSlot", 
                                "OneClickInteraction");
                            
                            Type replacementType = choice switch
                            {
                                0 => typeof(Pickup),
                                1 => typeof(ItemSlot),
                                2 => typeof(OneClickInteraction),
                                _ => null
                            };
                            
                            if (replacementType != null)
                            {
                                // Cache component data before destroying
                                bool isOneTime = component.isOneTime;
                                float cooldown = component.cooldown;
                                CharacterToInteract characterToInteract = component.characterToInteract;
                                
                                DestroyImmediate(component);
                                
                                var newComponent = targetObject.AddComponent(replacementType) as InteractableBase;
                                if (newComponent != null)
                                {
                                    newComponent.isOneTime = isOneTime;
                                    newComponent.cooldown = cooldown;
                                    newComponent.characterToInteract = characterToInteract;
                                    
                                    removed++;
                                    Debug.Log($"<color=cyan>[Replaced]</color> InteractableBase with {replacementType.Name} on '{objectName}' in scene '{Path.GetFileName(scenePath)}'");
                                }
                            }
                            else
                            {
                                Debug.LogWarning($"Skipped removing InteractableBase from '{objectName}' - no replacement chosen");
                            }
                        }
                        else
                        {
                            DestroyImmediate(component);
                            removed++;
                            Debug.Log($"<color=yellow>[Removed]</color> InteractableBase from '{objectName}' in scene '{Path.GetFileName(scenePath)}'");
                        }
                    }
                }

                if (removed > 0)
                {
                    EditorSceneManager.MarkSceneDirty(scene);
                    EditorSceneManager.SaveScene(scene);
                }
            }
            catch (Exception ex)
            {
                Debug.LogError($"Error removing components from scene {scenePath}: {ex.Message}\nStack: {ex.StackTrace}");
            }

            return removed;
        }
    }
}