// File: src/FileBrowser.h
#pragma once

#include <functional>
#include <string>
#include <vector>
#include <memory>
#include "systems/AssetManager.h"       // for ResourceTreeNode
#include "systems/assets/Texture2D.h"   // for Texture2D
#include "imgui.h"

namespace OX {

    /// Configuration for look & feel
    struct FileBrowserConfig
    {
        float thumbnailSize    = 64.0f;
        float padding          = 8.0f;
        float labelHeight      = 20.0f;
        ImU32  bgColor         = IM_COL32(40,40,40,255);
        ImU32  highlightColor  = IM_COL32(75,75,75,255);
        bool   showGrid        = true;
        bool   showThumbnails  = true;
        bool   allowMultiple   = false;
        // … add more theming or behavioral flags here
    };

    /// FileBrowser widget, supports grid & list, filtering, breadcrumbs, callbacks.
    class FileBrowser
    {
    public:
        using FileSelectedCallback = std::function<void(const std::string& path)>;

        FileBrowser();
        ~FileBrowser();

        /// Draw the entire browser window
        void Draw(const char* title = "File Browser");

        /// Set a filter string (wildcards, substrings, etc.)
        void SetFilter(const std::string& filter);

        /// Called whenever the user clicks on a file (not directory)
        void SetFileSelectedCallback(FileSelectedCallback cb);



        /// Access to tweak colors/sizes
        FileBrowserConfig& Config() { return _cfg; }

    private:
        // helpers
        void DrawToolbar();
        void DrawBreadcrumbs();
        void DrawGridView(const std::shared_ptr<ResourceTreeNode>& node);
        void DrawListView(const std::shared_ptr<ResourceTreeNode>& node);
        [[nodiscard]] bool PassesFilter(const std::string& name) const;
        void SetProgress(float p);
        ImTextureID GetIconTexture(const ResourceTreeNode&);  // stub for folder/file icons

        // state
        FileBrowserConfig              _cfg;
        std::string                    _currentPath = "res://";
        std::string                    _filter;
        bool                           _gridMode    = true;
        FileSelectedCallback           _onFileSelected;
        float                          _lastProgress;
        size_t                         _maxQueueSize;

    };
} // namespace OX