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

   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 "jucer_ColouredElement.h"
#include "../jucer_UtilityFunctions.h"

//==============================================================================
class PaintElementRoundedRectangle  : public ColouredElement
{
public:
    PaintElementRoundedRectangle (PaintRoutine* pr)
        : ColouredElement (pr, "Rounded Rectangle", true, false)
    {
        cornerSize = 10.0;
    }

    void draw (Graphics& g, const ComponentLayout* layout, const Rectangle<int>& parentArea) override
    {
        double x, y, w, h;
        position.getRectangleDouble (x, y, w, h, parentArea, layout);

        fillType.setFillType (g, getDocument(), parentArea);
        g.fillRoundedRectangle ((float) x, (float) y, (float) w, (float) h, (float) cornerSize);

        if (isStrokePresent)
        {
            strokeType.fill.setFillType (g, getDocument(), parentArea);

            g.drawRoundedRectangle ((float) x, (float) y, (float) w, (float) h, (float) cornerSize,
                                    getStrokeType().stroke.getStrokeThickness());
        }
    }

    void getEditableProperties (Array<PropertyComponent*>& props, bool multipleSelected) override
    {
        props.add (new CornerSizeProperty (this));

        ColouredElement::getEditableProperties (props, multipleSelected);

        props.add (new ShapeToPathProperty (this));
    }

    //==============================================================================
    class SetCornerSizeAction   : public PaintElementUndoableAction <PaintElementRoundedRectangle>
    {
    public:
        SetCornerSizeAction (PaintElementRoundedRectangle* const element, const double newSize_)
            : PaintElementUndoableAction <PaintElementRoundedRectangle> (element),
              newSize (newSize_)
        {
            oldSize = element->getCornerSize();
        }

        bool perform()
        {
            showCorrectTab();
            getElement()->setCornerSize (newSize, false);
            return true;
        }

        bool undo()
        {
            showCorrectTab();
            getElement()->setCornerSize (oldSize, false);
            return true;
        }

    private:
        double newSize, oldSize;
    };

    void setCornerSize (const double newSize, const bool undoable)
    {
        if (newSize != cornerSize)
        {
            if (undoable)
            {
                perform (new SetCornerSizeAction (this, newSize),
                         "Change rounded rectangle corner size");
            }
            else
            {
                cornerSize = newSize;
                changed();
            }
        }
    }

    double getCornerSize() const noexcept                         { return cornerSize; }

    //==============================================================================
    void fillInGeneratedCode (GeneratedCode& code, String& paintMethodCode) override
    {
        if (fillType.isInvisible() && (strokeType.isInvisible() || ! isStrokePresent))
            return;

        String x, y, w, h, s;
        positionToCode (position, code.document->getComponentLayout(), x, y, w, h);

        s << "{\n"
          << "    float x = " << castToFloat (x) << ", y = " << castToFloat (y) << ", "
          <<           "width = " << castToFloat (w) << ", height = " << castToFloat (h) << ";\n";

        if (! fillType.isInvisible())
            s << "    " << fillType.generateVariablesCode ("fill");

        if (isStrokePresent && ! strokeType.isInvisible())
            s << "    " << strokeType.fill.generateVariablesCode ("stroke");

        s << "    //[UserPaintCustomArguments] Customize the painting arguments here..\n"
          << customPaintCode
          << "    //[/UserPaintCustomArguments]\n";

        if (! fillType.isInvisible())
        {
            s << "    ";
            fillType.fillInGeneratedCode ("fill", position, code, s);
            s << "    g.fillRoundedRectangle (x, y, width, height, " << CodeHelpers::floatLiteral (cornerSize, 3)  << ");\n";
        }

        if (isStrokePresent && ! strokeType.isInvisible())
        {
            s << "    ";
            strokeType.fill.fillInGeneratedCode ("stroke", position, code, s);
            s << "    g.drawRoundedRectangle (x, y, width, height, " << CodeHelpers::floatLiteral (cornerSize, 3)
              << ", " << CodeHelpers::floatLiteral (strokeType.stroke.getStrokeThickness(), 3) << ");\n";
        }

        s << "}\n\n";

        paintMethodCode += s;
    }

    void applyCustomPaintSnippets (StringArray& snippets) override
    {
        customPaintCode.clear();

        if (! snippets.isEmpty() && (! fillType.isInvisible() || (isStrokePresent && ! strokeType.isInvisible())))
        {
            customPaintCode = snippets[0];
            snippets.remove (0);
        }
    }

    static const char* getTagName() noexcept        { return "ROUNDRECT"; }

    XmlElement* createXml() const override
    {
        XmlElement* const e = new XmlElement (getTagName());

        position.applyToXml (*e);
        e->setAttribute ("cornerSize", cornerSize);
        addColourAttributes (e);

        return e;
    }

    bool loadFromXml (const XmlElement& xml) override
    {
        if (xml.hasTagName (getTagName()))
        {
            position.restoreFromXml (xml, position);
            cornerSize = xml.getDoubleAttribute ("cornerSize", 10.0);
            loadColourAttributes (xml);

            return true;
        }

        jassertfalse;
        return false;
    }

    void convertToPath()
    {
        double x, y, w, h;
        getCurrentAbsoluteBoundsDouble (x, y, w, h);

        Path path;
        path.addRoundedRectangle ((float) x, (float) y, (float) w, (float) h, (float) cornerSize);

        convertToNewPathElement (path);
    }

private:
    double cornerSize;
    String customPaintCode;

    //==============================================================================
    class CornerSizeProperty  : public SliderPropertyComponent,
                                public ChangeListener
    {
    public:
        CornerSizeProperty (PaintElementRoundedRectangle* const owner_)
            : SliderPropertyComponent ("corner size", 1.0, 200.0, 0.5, 0.4),
              owner (owner_)
        {
            owner->getDocument()->addChangeListener (this);
        }

        ~CornerSizeProperty()
        {
            owner->getDocument()->removeChangeListener (this);
        }

        void setValue (double newValue)
        {
            owner->getDocument()->getUndoManager().undoCurrentTransactionOnly();

            owner->setCornerSize (newValue, true);
        }

        double getValue() const                 { return owner->getCornerSize(); }

        void changeListenerCallback (ChangeBroadcaster*)     { refresh(); }

    private:
        PaintElementRoundedRectangle* const owner;
    };

    //==============================================================================
    class ShapeToPathProperty  : public ButtonPropertyComponent
    {
    public:
        ShapeToPathProperty (PaintElementRoundedRectangle* const e)
            : ButtonPropertyComponent ("path", false),
              element (e)
        {
        }

        void buttonClicked()
        {
            element->convertToPath();
        }

        String getButtonText() const
        {
            return "convert to a path";
        }

    private:
        PaintElementRoundedRectangle* const element;
    };
};