using Godot;
using System;
using System.Collections.Generic;
/// <summary>
/// A tool for finding and fixing images missing mipmaps.
/// Made with help from Claud (Sonnet)
/// </summary>
[Tool]
public partial class MipmapDetector : EditorPlugin
{
    private Button _toolButton;
    private Control _mipmapPanel;
    private VBoxContainer _resultContainer;
    private ScrollContainer _scrollContainer;
    private TextureProgressBar _progressBar;
    private Label _statusLabel;


    public override void _EnterTree()
    {
        _toolButton = new Button
        {
            Text = "Check Mipmaps",
            TooltipText = "Scan project for textures with missing mipmaps"
        };
        _toolButton.Pressed += OnCheckMipmapsPressed;
        
        AddControlToContainer(CustomControlContainer.Toolbar, _toolButton);
        
        CreatePanel();
    }

    public override void _ExitTree()
    {
        if (_toolButton != null)
        {
            RemoveControlFromContainer(CustomControlContainer.Toolbar, _toolButton);
            _toolButton.QueueFree();
        }
        if (_mipmapPanel != null)
        {
            RemoveControlFromDocks(_mipmapPanel);
            _mipmapPanel.QueueFree();
        }
        // if (_missingPanel != null)
        // {
        //     RemoveControlFromDocks(_missingPanel);
        //     _missingPanel.QueueFree();
        // }
    }
    private void CheckImageValidity(string path)
    {
        try
        {
            var image = Image.LoadFromFile(path);
            if (image == null)
            {
                // Add to missing/invalid files panel
                GD.PrintErr(path, "Failed to load image file");
                return;
            }

            // Additional image checks could go here
            GD.Print($"Valid image found: {path}");
            GD.Print($"Size: {image.GetWidth()}x{image.GetHeight()}, Format: {image.GetFormat()}");
        }
        catch (Exception e)
        {
            GD.PrintErr(path, $"Error loading image: {e.Message}");
        }
    }

    // private void AddToMissingPanel(string path, string reason)
    // {
    //     var hbox = new HBoxContainer();
    //         
    //     var pathLabel = new Label
    //     {
    //         Text = $"{path}\nReason: {reason}",
    //         SizeFlagsHorizontal = Control.SizeFlags.ExpandFill
    //     };
    //     hbox.AddChild(pathLabel);
    //
    //     _missingContainer.AddChild(hbox);
    // }
    private void CreatePanel()
    {
        _mipmapPanel = new Control
        {
            Name = "Mipmap Inspector"
        };
        
        var vbox = new VBoxContainer
        {
            AnchorRight = 1,
            AnchorBottom = 1
        };

        // Add status section at the top
        var statusBox = new HBoxContainer();
        _statusLabel = new Label
        {
            Text = "Ready",
            SizeFlagsHorizontal = Control.SizeFlags.ExpandFill
        };
        statusBox.AddChild(_statusLabel);

        _progressBar = new TextureProgressBar
        {
            Visible = false,
            CustomMinimumSize = new Vector2(200, 8)
        };
        statusBox.AddChild(_progressBar);
        
        vbox.AddChild(statusBox);
        
        _scrollContainer = new ScrollContainer
        {
            SizeFlagsHorizontal = Control.SizeFlags.ExpandFill,
            SizeFlagsVertical = Control.SizeFlags.ExpandFill
        };

        _resultContainer = new VBoxContainer
        {
            SizeFlagsHorizontal = Control.SizeFlags.ExpandFill
        };

        _scrollContainer.AddChild(_resultContainer);
        vbox.AddChild(_scrollContainer);
        _mipmapPanel.AddChild(vbox);

        AddControlToDock(DockSlot.RightBl, _mipmapPanel);
    }

    private void ShowLoading(string status)
    {
        _statusLabel.Text = status;
        _progressBar.Visible = true;
        // Start progress animation
        _progressBar.Value = 0;
        GetTree().CreateTimer(0.1).Timeout += AnimateProgress;
    }
    private void HideLoading()
    {
        _progressBar.Visible = false;
        _statusLabel.Text = "Ready";
    }
    private void AnimateProgress()
    {
        if (_progressBar.Visible)
        {
            _progressBar.Value = (_progressBar.Value + 1) % 100;
            GetTree().CreateTimer(0.05).Timeout += AnimateProgress;
        }
    }

   
    private void OnCheckMipmapsPressed()
    {
        ClearResults();
        ShowLoading("Scanning for textures...");
        
        // Defer the actual scan to let the UI update
        GetTree().CreateTimer(0.1).Timeout += () =>
        {
            var texturePaths = FindAllTextures("res://");
            _statusLabel.Text = "Checking mipmaps...";
            var missingMipmaps = CheckMipmaps(texturePaths);
            DisplayResults(missingMipmaps);
            HideLoading();
        };
    }

   
    private List<string> FindAllTextures(string path)
    {
        var textures = new List<string>();
        var dir = DirAccess.Open(path);
    
        if (dir == null)
            return textures;

        // Skip addons folder
        if (path.Contains("addons"))
            return textures;

        // Check for .gdignore
        if (FileAccess.FileExists(path.PathJoin(".gdignore")))
            return textures;

        dir.ListDirBegin();
        string fileName = dir.GetNext();

        while (!string.IsNullOrEmpty(fileName))
        {
            if (fileName != "." && fileName != "..")
            {
                string fullPath = path.PathJoin(fileName);
            
                if (dir.CurrentIsDir())
                {
                    if (path != "res://")
                    {
                        textures.AddRange(FindAllTextures(fullPath));
                    }
                    else if (!fileName.StartsWith("."))
                    {
                        textures.AddRange(FindAllTextures(fullPath));
                    }
                }
                else if (path != "res://" && 
                         (fileName.EndsWith(".png") || fileName.EndsWith(".jpg") || 
                          fileName.EndsWith(".jpeg") || fileName.EndsWith(".webp")))
                {
                    if (FileAccess.FileExists(fullPath))
                    {
                        textures.Add(fullPath);
                    }
                }
            }
            fileName = dir.GetNext();
        }
    
        dir.ListDirEnd();
        return textures;
    }

    private List<string> CheckMipmaps(List<string> texturePaths)
    {
        var missingMipmaps = new List<string>();

        foreach (string path in texturePaths)
        {
            if (!ResourceLoader.Exists(path))
                continue;

            var texture = ResourceLoader.Load<Texture2D>(path);
            if (texture != null)
            {
                var image = texture.GetImage();
                if (image != null && !image.HasMipmaps())
                {
                    missingMipmaps.Add(path);
                }
            }
        }

        return missingMipmaps;
    }

    private void DisplayResults(List<string> missingMipmaps)
    {
        if (missingMipmaps.Count == 0)
        {
            var label = new Label { Text = "No textures with missing mipmaps found!" };
            _resultContainer.AddChild(label);
        }
        else
        {
            var headerBox = new HBoxContainer();
        
            var headerLabel = new Label 
            { 
                Text = $"Found {missingMipmaps.Count} textures with missing mipmaps:",
                SizeFlagsHorizontal = Control.SizeFlags.ExpandFill
            };
            headerBox.AddChild(headerLabel);
        
            var fixAllButton = new Button { Text = "Fix All" };
            fixAllButton.Pressed += () => FixAllMipmaps(missingMipmaps);
            headerBox.AddChild(fixAllButton);
        
            _resultContainer.AddChild(headerBox);

            foreach (string path in missingMipmaps)
            {             var hbox = new HBoxContainer();
                
                var pathLabel = new Label
                {
                    Text = path,
                    SizeFlagsHorizontal = Control.SizeFlags.ExpandFill
                };

                var pathButton = new Button
                {
                    Flat = true,
                    SizeFlagsHorizontal = Control.SizeFlags.ExpandFill,
                    CustomMinimumSize = new Vector2(0, 0)
                };
                pathButton.AddChild(pathLabel);
                
                // Add hover effect
                pathButton.MouseEntered += () => pathButton.Modulate = new Color(1, 1, 1, 0.7f);
                pathButton.MouseExited += () => pathButton.Modulate = Colors.White;
                
                // Handle click to select in FileSystem dock
                pathButton.Pressed += () => SelectInFileSystem(path);
                
                hbox.AddChild(pathButton);
                
                var fixButton = new Button { Text = "Fix" };
                fixButton.Pressed += () => FixMipmaps(path);
                hbox.AddChild(fixButton);
                
                _resultContainer.AddChild(hbox);
            }
        }
    }
    private void FixAllMipmaps(List<string> paths)
    {
        ShowLoading($"Fixing mipmaps (0/{paths.Count})...");
        // Immediately clear the list to show we're processing
        ClearResults();
        ProcessNextBatch(new Queue<string>(paths));
    }
    
    private void ProcessNextBatch(Queue<string> remainingPaths, int batchSize = 5)
    {
        if (remainingPaths.Count == 0)
        {
            HideLoading();
            // Force a filesystem scan
            EditorInterface.Singleton.GetResourceFilesystem().Scan();
        
            // Refresh the display
            GetTree().CreateTimer(0.5).Timeout += () =>
            {
                var texturePaths = FindAllTextures("res://");
                var missingMipmaps = CheckMipmaps(texturePaths);
                DisplayResults(missingMipmaps);
            };
            return;
        }

        int totalCount = remainingPaths.Count;
        int processedCount = 0;

        // Process a small batch
        int count = Math.Min(batchSize, remainingPaths.Count);
        var currentBatch = new List<string>();
        
        for (int i = 0; i < count; i++)
        {
            if (remainingPaths.TryDequeue(out string path))
            {
                currentBatch.Add(path);
                processedCount++;
            }
        }

        // Update status
        _statusLabel.Text = $"Fixing mipmaps ({processedCount}/{totalCount})...";

        // Process the batch
        foreach (var path in currentBatch)
        {
            try
            {
                string importPath = path + ".import";
                if (!FileAccess.FileExists(importPath))
                    continue;

                var file = FileAccess.Open(importPath, FileAccess.ModeFlags.ReadWrite);
                if (file != null)
                {
                    string content = file.GetAsText();
                    file.Close();

                    content = content.Replace("mipmaps/generate=false", "mipmaps/generate=true");

                    file = FileAccess.Open(importPath, FileAccess.ModeFlags.Write);
                    if (file != null)
                    {
                        file.StoreString(content);
                        file.Close();
                    }
                }
            }
            catch (Exception e)
            {
                GD.PrintErr($"Error processing {path}: {e.Message}");
            }
        }

        // Do a single reimport for the batch
        if (currentBatch.Count > 0)
        {
            EditorInterface.Singleton.GetResourceFilesystem().ReimportFiles(currentBatch.ToArray());
        }

        // Schedule next batch with a delay
        if (remainingPaths.Count > 0)
        {
            GetTree().CreateTimer(0.2).Timeout += () => ProcessNextBatch(remainingPaths);
        }
    }
    
    private bool UpdateImportSettings(string path)
    {
        try
        {
            // First verify the texture actually exists
            if (!FileAccess.FileExists(path))
            {
                GD.PushError($"Texture file doesn't exist: {path}");
                return false;
            }

            string importPath = path + ".import";
            if (!FileAccess.FileExists(importPath))
            {
                GD.PushError($"No import file found for: {path}");
                return false;
            }

            // Read and modify the import file
            var file = FileAccess.Open(importPath, FileAccess.ModeFlags.ReadWrite);
            if (file == null)
            {
                GD.PushError($"Failed to open import file: {importPath}");
                return false;
            }

            string content = file.GetAsText();
            file.Close();

            // Parse and modify the import content
            string[] lines = content.Split('\n');
            var newLines = new List<string>();
            bool inMetadataSection = false;
            bool addedMipmapSettings = false;

            foreach (string line in lines)
            {
                string trimmedLine = line.TrimStart();
                
                if (trimmedLine.StartsWith("["))
                {
                    if (trimmedLine == "[metadata]")
                    {
                        inMetadataSection = true;
                        newLines.Add(line);
                        newLines.Add("mipmaps/generate=true");
                        newLines.Add("mipmaps/limit=-1");
                        addedMipmapSettings = true;
                        continue;
                    }
                    else
                    {
                        inMetadataSection = false;
                    }
                }

                if (inMetadataSection && (trimmedLine.StartsWith("mipmaps/generate") || trimmedLine.StartsWith("mipmaps/limit")))
                {
                    continue;
                }

                newLines.Add(line);
            }

            if (!addedMipmapSettings)
            {
                newLines.Add("[metadata]");
                newLines.Add("mipmaps/generate=true");
                newLines.Add("mipmaps/limit=-1");
            }

            // Write back the modified content
            file = FileAccess.Open(importPath, FileAccess.ModeFlags.Write);
            if (file == null)
            {
                GD.PushError($"Failed to write to import file: {importPath}");
                return false;
            }

            file.StoreString(string.Join("\n", newLines));
            file.Close();

            // Delete the existing imported file to force a clean reimport
            string importedPath = "res://.godot/imported/" + path.GetFile() + "-" + importPath.GetFile().Hash();
            if (FileAccess.FileExists(importedPath))
            {
                DirAccess.RemoveAbsolute(importedPath);
            }

            GD.Print($"Updated import settings for: {path}");
            return true;
        }
        catch (Exception e)
        {
            GD.PushError($"Exception while processing {path}: {e.Message}");
            return false;
        }
    }
    private void SelectInFileSystem(string path)
    {
        // Get the EditorInterface singleton
        var editorInterface = EditorInterface.Singleton;
        
        // Select the file in the FileSystem dock
        editorInterface.GetFileSystemDock().NavigateToPath(path);
        
        // Optional: Also select it in the editor
        editorInterface.EditResource(GD.Load(path));
    }

    private void FixMipmaps(string path)
    {
        try
        {
            string importPath = path + ".import";
            if (!FileAccess.FileExists(importPath))
            {
                GD.PushError($"No import file found for: {path}");
                return;
            }

            // Read current import settings
            var file = FileAccess.Open(importPath, FileAccess.ModeFlags.ReadWrite);
            if (file == null)
            {
                GD.PushError($"Failed to open import file: {path}");
                return;
            }

            string content = file.GetAsText();
            file.Close();

            // Directly replace the mipmap setting
            content = content.Replace("mipmaps/generate=false", "mipmaps/generate=true");

            // Write the modified content
            file = FileAccess.Open(importPath, FileAccess.ModeFlags.Write);
            if (file == null)
            {
                GD.PushError($"Failed to write to import file: {path}");
                return;
            }

            file.StoreString(content);
            file.Close();

            // Delete the imported resource to force a clean reimport
            string importedDir = "res://.godot/imported/";
            var importedFile = path.GetFile() + "-" + importPath.GetFile().Hash();
            string importedPath = importedDir.PathJoin(importedFile);
        
            if (FileAccess.FileExists(importedPath))
            {
                DirAccess.RemoveAbsolute(importedPath);
            }

            // Trigger reimport
            EditorInterface.Singleton.GetResourceFilesystem().ReimportFiles(new[] { path });
            EditorInterface.Singleton.GetResourceFilesystem().Scan();

            // Refresh the display after a short delay to allow for reimport
            GetTree().CreateTimer(0.5).Timeout += () =>
            {
                ClearResults();
                var texturePaths = FindAllTextures("res://");
                var missingMipmaps = CheckMipmaps(texturePaths);
                DisplayResults(missingMipmaps);
            };

            GD.Print($"Successfully enabled mipmaps for: {path}");
        }
        catch (Exception e)
        {
            GD.PushError($"Failed to process {path}: {e.Message}");
        }
    }


    private void ClearResults()
    {
        foreach (Node child in _resultContainer.GetChildren())
        {
            child.QueueFree();
        }
    }
}