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

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   JUCE is an open source library subject to commercial or open-source
   licensing.

   By using JUCE, you agree to the terms of both the JUCE 5 End-User License
   Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
   27th April 2017).

   End User License Agreement: www.juce.com/juce-5-licence
   Privacy Policy: www.juce.com/juce-5-privacy-policy

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

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

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

#include "../../Application/jucer_Headers.h"
#include "jucer_PaintElementGroup.h"

PaintElementGroup::PaintElementGroup (PaintRoutine* pr)
    : PaintElement (pr, "Group")
{
}

PaintElementGroup::~PaintElementGroup() {}

void PaintElementGroup::ungroup (const bool undoable)
{
    getOwner()->getSelectedElements().deselectAll();
    getOwner()->getSelectedPoints().deselectAll();

    const int index = getOwner()->indexOfElement (this);

    for (int i = 0; i < subElements.size(); ++i)
    {
        std::unique_ptr<XmlElement> xml (subElements.getUnchecked(i)->createXml());

        PaintElement* newOne = getOwner()->addElementFromXml (*xml, index, undoable);
        getOwner()->getSelectedElements().addToSelection (newOne);
    }

    getOwner()->removeElement (this, undoable);
}

void PaintElementGroup::groupSelected (PaintRoutine* routine)
{
    if (routine->getSelectedElements().getNumSelected() > 1)
    {
        auto* newGroup = new PaintElementGroup (routine);
        int frontIndex = -1;

        for (int i = 0; i < routine->getNumElements(); ++i)
        {
            if (routine->getSelectedElements().isSelected (routine->getElement (i)))
            {
                std::unique_ptr<XmlElement> xml (routine->getElement(i)->createXml());

                if (auto* newOne = ObjectTypes::createElementForXml (xml.get(), routine))
                    newGroup->subElements.add (newOne);

                if (i > frontIndex)
                    frontIndex = i;
            }
        }

        routine->deleteSelected();

        auto* g = routine->addNewElement (newGroup, frontIndex, true);
        routine->getSelectedElements().selectOnly (g);
    }
}

int PaintElementGroup::getNumElements() const noexcept                              { return subElements.size(); }

PaintElement* PaintElementGroup::getElement (const int index) const noexcept        { return subElements [index]; }

int PaintElementGroup::indexOfElement (const PaintElement* element) const noexcept  { return subElements.indexOf (element); }

bool PaintElementGroup::containsElement (const PaintElement* element) const
{
    if (subElements.contains (element))
        return true;

    for (int i = subElements.size(); --i >= 0;)
        if (PaintElementGroup* pg = dynamic_cast<PaintElementGroup*> (subElements.getUnchecked(i)))
            if (pg->containsElement (element))
                return true;

    return false;
}

//==============================================================================
void PaintElementGroup::setInitialBounds (int /*parentWidth*/, int /*parentHeight*/)
{
}

Rectangle<int> PaintElementGroup::getCurrentBounds (const Rectangle<int>& parentArea) const
{
    Rectangle<int> r;

    if (subElements.size() > 0)
    {
        r = subElements.getUnchecked(0)->getCurrentBounds (parentArea);

        for (int i = 1; i < subElements.size(); ++i)
            r = r.getUnion (subElements.getUnchecked(i)->getCurrentBounds (parentArea));
    }

    return r;
}

void PaintElementGroup::setCurrentBounds (const Rectangle<int>& b, const Rectangle<int>& parentArea, const bool undoable)
{
    Rectangle<int> newBounds (b);
    newBounds.setSize (jmax (1, newBounds.getWidth()),
                       jmax (1, newBounds.getHeight()));

    const Rectangle<int> current (getCurrentBounds (parentArea));

    if (newBounds != current)
    {
        const int dx = newBounds.getX() - current.getX();
        const int dy = newBounds.getY() - current.getY();

        const double scaleStartX = current.getX();
        const double scaleStartY = current.getY();
        const double scaleX = newBounds.getWidth() / (double) current.getWidth();
        const double scaleY = newBounds.getHeight() / (double) current.getHeight();

        for (int i = 0; i < subElements.size(); ++i)
        {
            PaintElement* const e = subElements.getUnchecked(i);

            Rectangle<int> pos (e->getCurrentBounds (parentArea));

            const int newX = roundToInt ((pos.getX() - scaleStartX) * scaleX + scaleStartX + dx);
            const int newY = roundToInt ((pos.getY() - scaleStartY) * scaleY + scaleStartY + dy);

            pos.setBounds (newX, newY,
                           roundToInt ((pos.getRight() - scaleStartX) * scaleX + scaleStartX + dx) - newX,
                           roundToInt ((pos.getBottom() - scaleStartY) * scaleY + scaleStartY + dy) - newY);

            e->setCurrentBounds (pos, parentArea, undoable);
        }
    }
}

//==============================================================================
void PaintElementGroup::draw (Graphics& g, const ComponentLayout* layout, const Rectangle<int>& parentArea)
{
    for (int i = 0; i < subElements.size(); ++i)
        subElements.getUnchecked(i)->draw (g, layout, parentArea);
}

void PaintElementGroup::getEditableProperties (Array<PropertyComponent*>& props, bool multipleSelected)
{
    if (! multipleSelected)
        props.add (new UngroupProperty (this));
}

void PaintElementGroup::fillInGeneratedCode (GeneratedCode& code, String& paintMethodCode)
{
    for (int i = 0; i < subElements.size(); ++i)
        subElements.getUnchecked(i)->fillInGeneratedCode (code, paintMethodCode);
}

const char* PaintElementGroup::getTagName() noexcept        { return "GROUP"; }

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

    for (int i = 0; i < subElements.size(); ++i)
    {
        XmlElement* const sub = subElements.getUnchecked(i)->createXml();
        e->addChildElement (sub);
    }

    return e;
}

bool PaintElementGroup::loadFromXml (const XmlElement& xml)
{
    if (xml.hasTagName (getTagName()))
    {
        forEachXmlChildElement (xml, e)
            if (PaintElement* const pe = ObjectTypes::createElementForXml (e, owner))
                subElements.add (pe);

        return true;
    }

    jassertfalse;
    return false;
}

void PaintElementGroup::applyCustomPaintSnippets (StringArray& snippets)
{
    for (auto* e : subElements)
        e->applyCustomPaintSnippets (snippets);
}

PaintElementGroup::UngroupProperty::UngroupProperty (PaintElementGroup* const e)
    : ButtonPropertyComponent ("ungroup", false),
      element (e)
{
}

void PaintElementGroup::UngroupProperty::buttonClicked()
{
    element->ungroup (true);
}

String PaintElementGroup::UngroupProperty::getButtonText() const
{
    return "Ungroup";
}
