/*
  ==============================================================================

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2020 - Raw Material Software Limited

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For this technical preview, this file is not subject to commercial licensing.

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

#pragma once

#include "PaintElements/jucer_PaintElement.h"
class JucerDocument;
class PathPoint;

//==============================================================================
/**
    Contains a set of PaintElements that constitute some kind of paint() method.
*/
class PaintRoutine
{
public:
    //==============================================================================
    PaintRoutine();
    ~PaintRoutine();

    //==============================================================================
    void changed();
    bool perform (UndoableAction* action, const String& actionName);

    //==============================================================================
    int getNumElements() const noexcept                                     { return elements.size(); }
    PaintElement* getElement (const int index) const noexcept               { return elements [index]; }
    int indexOfElement (PaintElement* e) const noexcept                     { return elements.indexOf (e); }
    bool containsElement (PaintElement* e) const noexcept                   { return elements.contains (e); }

    //==============================================================================
    void clear();
    PaintElement* addElementFromXml (const XmlElement& xml, const int index, const bool undoable);
    PaintElement* addNewElement (PaintElement* elementToCopy, const int index, const bool undoable);
    void removeElement (PaintElement* element, const bool undoable);

    void elementToFront (PaintElement* element, const bool undoable);
    void elementToBack (PaintElement* element, const bool undoable);

    const Colour getBackgroundColour() const noexcept                       { return backgroundColour; }
    void setBackgroundColour (Colour newColour) noexcept;

    void fillWithBackground (Graphics& g, const bool drawOpaqueBackground);
    void drawElements (Graphics& g, const Rectangle<int>& relativeTo);

    void dropImageAt (const File& f, int x, int y);

    //==============================================================================
    SelectedItemSet <PaintElement*>& getSelectedElements() noexcept         { return selectedElements; }
    SelectedItemSet <PathPoint*>& getSelectedPoints() noexcept              { return selectedPoints; }

    static const char* const clipboardXmlTag;
    void copySelectedToClipboard();
    void paste();
    void deleteSelected();
    void selectAll();

    void selectedToFront();
    void selectedToBack();

    void alignTop();
    void alignRight();
    void alignBottom();
    void alignLeft();

    void groupSelected();
    void ungroupSelected();

    void startDragging (const Rectangle<int>& parentArea);
    void dragSelectedComps (int dxFromDragStart, int dyFromDragStart, const Rectangle<int>& parentArea);
    void endDragging();

    void bringLostItemsBackOnScreen (const Rectangle<int>& parentArea);

    //==============================================================================
    void setDocument (JucerDocument* const doc)                       { document = doc; }
    JucerDocument* getDocument() const noexcept                       { return document; }

    //==============================================================================
    static const char* xmlTagName;
    XmlElement* createXml() const;
    bool loadFromXml (const XmlElement& xml);

    void fillInGeneratedCode (GeneratedCode& code, String& paintMethodCode) const;

    void applyCustomPaintSnippets (StringArray&);

    //==============================================================================
private:
    OwnedArray <PaintElement> elements;
    SelectedItemSet <PaintElement*> selectedElements;
    SelectedItemSet <PathPoint*> selectedPoints;
    JucerDocument* document;

    Colour backgroundColour;

    friend class DeleteElementAction;
    friend class FrontOrBackElementAction;
    void moveElementZOrder (int oldIndex, int newIndex);
};