#ifndef slic3r_UnsavedChangesDialog_hpp_
#define slic3r_UnsavedChangesDialog_hpp_

#include <wx/dataview.h>
#include <map>
#include <vector>

#include "GUI_Utils.hpp"
#include "wxExtensions.hpp"
#include "libslic3r/Preset.hpp"

class ScalableButton;
class wxStaticText;

namespace Slic3r {
namespace GUI{

// ----------------------------------------------------------------------------
//                  ModelNode: a node inside UnsavedChangesModel
// ----------------------------------------------------------------------------

class ModelNode;
using ModelNodePtrArray = std::vector<std::unique_ptr<ModelNode>>;

// On all of 3 different platforms Bitmap+Text icon column looks different 
// because of Markup text is missed or not implemented.
// As a temporary workaround, we will use:
// MSW - DataViewBitmapText (our custom renderer wxBitmap + wxString, supported Markup text)
// OSX - -//-, but Markup text is not implemented right now
// GTK - wxDataViewIconText (wxWidgets for GTK renderer wxIcon + wxString, supported Markup text)
class ModelNode
{
    wxWindow*           m_parent_win{ nullptr };

    ModelNode*          m_parent;
    ModelNodePtrArray   m_children;
    wxBitmap            m_empty_bmp;
    Preset::Type        m_preset_type {Preset::TYPE_INVALID};

    std::string         m_icon_name;
    // saved values for colors if they exist
    wxString            m_old_color;
    wxString            m_new_color;

    // TODO/FIXME:
    // the GTK version of wxDVC (in particular wxDataViewCtrlInternal::ItemAdded)
    // needs to know in advance if a node is or _will be_ a container.
    // Thus implementing:
    //   bool IsContainer() const
    //    { return m_children.size()>0; }
    // doesn't work with wxGTK when UnsavedChangesModel::AddToClassical is called
    // AND the classical node was removed (a new node temporary without children
    // would be added to the control)
    bool                m_container {true};

#ifdef __linux__
    wxIcon              get_bitmap(const wxString& color);
#else
    wxBitmap            get_bitmap(const wxString& color);
#endif //__linux__

public:

    bool        m_toggle {true};
#ifdef __linux__
    wxIcon      m_icon;
    wxIcon      m_old_color_bmp;
    wxIcon      m_new_color_bmp;
#else
    wxBitmap    m_icon;
    wxBitmap    m_old_color_bmp;
    wxBitmap    m_new_color_bmp;
#endif //__linux__
    wxString    m_text;
    wxString    m_old_value;
    wxString    m_new_value;

    // preset(root) node
    ModelNode(Preset::Type preset_type, wxWindow* parent_win, const wxString& text, const std::string& icon_name);

    // category node
    ModelNode(ModelNode* parent, const wxString& text, const std::string& icon_name);

    // group node
    ModelNode(ModelNode* parent, const wxString& text);

    // option node
    ModelNode(ModelNode* parent, const wxString& text, const wxString& old_value, const wxString& new_value);

    bool                IsContainer() const         { return m_container; }
    bool                IsToggled() const           { return m_toggle; }
    void                Toggle(bool toggle = true)  { m_toggle = toggle; }
    bool                IsRoot() const              { return m_parent == nullptr; }
    Preset::Type        type() const                { return m_preset_type; }
    const wxString&     text() const                { return m_text; }

    ModelNode*          GetParent()                 { return m_parent; }
    ModelNodePtrArray&  GetChildren()               { return m_children; }
    ModelNode*          GetNthChild(unsigned int n) { return m_children[n].get(); }
    unsigned int        GetChildCount() const       { return m_children.size(); }

    void Append(std::unique_ptr<ModelNode> child)   { m_children.emplace_back(std::move(child)); }

    void UpdateEnabling();
    void UpdateIcons();
};


// ----------------------------------------------------------------------------
//                  UnsavedChangesModel
// ----------------------------------------------------------------------------

class UnsavedChangesModel : public wxDataViewModel
{
    wxWindow*               m_parent_win { nullptr };
    std::vector<ModelNode*> m_preset_nodes;

    wxDataViewCtrl*         m_ctrl{ nullptr };

    ModelNode *AddOption(ModelNode *group_node,
                         wxString   option_name,
                         wxString   old_value,
                         wxString   new_value);
    ModelNode *AddOptionWithGroup(ModelNode *category_node,
                                  wxString   group_name,
                                  wxString   option_name,
                                  wxString   old_value,
                                  wxString   new_value);
    ModelNode *AddOptionWithGroupAndCategory(ModelNode *preset_node,
                                             wxString   category_name,
                                             wxString   group_name,
                                             wxString   option_name,
                                             wxString   old_value,
                                             wxString   new_value,
                                             const std::string category_icon_name);

public:
    enum {
        colToggle,
        colIconText,
        colOldValue,
        colNewValue,
        colMax
    };

    UnsavedChangesModel(wxWindow* parent);
    ~UnsavedChangesModel();

    void            SetAssociatedControl(wxDataViewCtrl* ctrl) { m_ctrl = ctrl; }

    wxDataViewItem  AddPreset(Preset::Type type, wxString preset_name, PrinterTechnology pt);
    wxDataViewItem  AddOption(Preset::Type type, wxString category_name, wxString group_name, wxString option_name,
                              wxString old_value, wxString new_value, const std::string category_icon_name);

    void            UpdateItemEnabling(wxDataViewItem item);
    bool            IsEnabledItem(const wxDataViewItem& item);

    unsigned int    GetColumnCount() const override { return colMax; }
    wxString        GetColumnType(unsigned int col) const override;
    void            Rescale();

    wxDataViewItem  GetParent(const wxDataViewItem& item) const override;
    unsigned int    GetChildren(const wxDataViewItem& parent, wxDataViewItemArray& array) const override;

    void GetValue(wxVariant& variant, const wxDataViewItem& item, unsigned int col) const override;
    bool SetValue(const wxVariant& variant, const wxDataViewItem& item, unsigned int col) override;

    bool IsEnabled(const wxDataViewItem& item, unsigned int col) const override;
    bool IsContainer(const wxDataViewItem& item) const override;
    // Is the container just a header or an item with all columns
    // In our case it is an item with all columns
    bool HasContainerColumns(const wxDataViewItem& WXUNUSED(item)) const override { return true; }
};


//------------------------------------------
//          UnsavedChangesDialog
//------------------------------------------
class UnsavedChangesDialog : public DPIDialog
{
    wxDataViewCtrl*         m_tree          { nullptr };
    UnsavedChangesModel*    m_tree_model    { nullptr };

    ScalableButton*         m_save_btn      { nullptr };
    ScalableButton*         m_transfer_btn  { nullptr };
    ScalableButton*         m_discard_btn   { nullptr };
    wxStaticText*           m_action_line   { nullptr };
    wxStaticText*           m_info_line     { nullptr };
    wxCheckBox*             m_remember_choice   { nullptr };

    bool                    m_empty_selection   { false };
    bool                    m_has_long_strings  { false };
    int                     m_save_btn_id       { wxID_ANY };
    int                     m_move_btn_id       { wxID_ANY };
    int                     m_continue_btn_id   { wxID_ANY };

    std::string             m_app_config_key;

    enum class Action {
        Undef,
        Transfer,
        Discard,
        Save
    };

    static constexpr char ActTransfer[] = "transfer";
    static constexpr char ActDiscard[]  = "discard";
    static constexpr char ActSave[]     = "save";

    // selected action after Dialog closing
    Action m_exit_action {Action::Undef};

    struct ItemData
    {
        std::string     opt_key;
        wxString        opt_name;
        wxString        old_val;
        wxString        new_val;
        Preset::Type    type;
        bool            is_long {false};
    };
    // tree items related to the options
    std::map<wxDataViewItem, ItemData> m_items_map;

    // preset names which are modified in SavePresetDialog and related types
    std::vector<std::pair<std::string, Preset::Type>>  names_and_types;

public:
    UnsavedChangesDialog(const wxString& header);
    UnsavedChangesDialog(Preset::Type type, PresetCollection* dependent_presets, const std::string& new_selected_preset);
    ~UnsavedChangesDialog() {}

    wxString get_short_string(wxString full_string);

    void build(Preset::Type type, PresetCollection* dependent_presets, const std::string& new_selected_preset, const wxString& header = "");
    void update(Preset::Type type, PresetCollection* dependent_presets, const std::string& new_selected_preset, const wxString& header);
    void update_tree(Preset::Type type, PresetCollection *presets);
    void item_value_changed(wxDataViewEvent &event);
    void context_menu(wxDataViewEvent &event);
    void show_info_line(Action action, std::string preset_name = "");
    void update_config(Action action);
    void close(Action action);
    bool save(PresetCollection* dependent_presets);

    bool save_preset() const        { return m_exit_action == Action::Save;     }
    bool transfer_changes() const   { return m_exit_action == Action::Transfer; }
    bool discard() const            { return m_exit_action == Action::Discard;  }

    // get full bundle of preset names and types for saving
    const std::vector<std::pair<std::string, Preset::Type>>& get_names_and_types() { return names_and_types; }
    // short version of the previous function, for the case, when just one preset is modified
    std::string get_preset_name() { return names_and_types[0].first; }

    std::vector<std::string> get_unselected_options(Preset::Type type);
    std::vector<std::string> get_selected_options();

protected:
    void on_dpi_changed(const wxRect& suggested_rect) override;
    void on_sys_color_changed() override;
};


//------------------------------------------
//          FullCompareDialog
//------------------------------------------
class FullCompareDialog : public wxDialog
{
public:
    FullCompareDialog(const wxString& option_name, const wxString& old_value, const wxString& new_value);
    ~FullCompareDialog() {}
};


} 
}

#endif //slic3r_UnsavedChangesDialog_hpp_