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

   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


//==============================================================================
class ImageButtonHandler  : public ButtonHandler
{
public:
    enum ImageRole
    {
        normalImage = 0,
        overImage = 1,
        downImage = 2
    };

    //==============================================================================
    ImageButtonHandler()
        : ButtonHandler ("Image Button", "juce::ImageButton", typeid (ImageButton), 150, 24)
    {
    }

    Component* createNewComponent (JucerDocument*) override
    {
        return new ImageButton ("new button");
    }

    void getEditableProperties (Component* component, JucerDocument& document,
                                Array<PropertyComponent*>& props, bool multipleSelected) override
    {
        ButtonHandler::getEditableProperties (component, document, props, multipleSelected);

        if (multipleSelected)
            return;

        addColourProperties (component, document, props);

        if (auto* ib = dynamic_cast<ImageButton*> (component))
        {
            auto& layout = *document.getComponentLayout();

            props.add (new ImageButtonProportionProperty (layout, ib));

            props.add (new ImageButtonResourceProperty (layout, ib, normalImage, "normal image"));
            props.add (new ImageButtonOpacityProperty (layout, ib, "opacity", normalImage));
            props.add (new ImageButtonColourProperty (layout, ib, "overlay col.", normalImage));

            props.add (new ImageButtonResourceProperty (layout, ib, overImage, "over image"));
            props.add (new ImageButtonOpacityProperty (layout, ib, "opacity", overImage));
            props.add (new ImageButtonColourProperty (layout, ib, "overlay col.", overImage));

            props.add (new ImageButtonResourceProperty (layout, ib, downImage, "down image"));
            props.add (new ImageButtonOpacityProperty (layout, ib, "opacity", downImage));
            props.add (new ImageButtonColourProperty (layout, ib, "overlay col.", downImage));
        }
    }

    XmlElement* createXmlFor (Component* comp, const ComponentLayout* layout) override
    {
        XmlElement* e = ButtonHandler::createXmlFor (comp, layout);

        ImageButton* const ib = (ImageButton*) comp;

        e->setAttribute ("keepProportions", doesImageKeepProportions (ib));

        e->setAttribute ("resourceNormal", getImageResource (ib, normalImage));
        e->setAttribute ("opacityNormal", getImageOpacity (ib, normalImage));
        e->setAttribute ("colourNormal", getImageColour (ib, normalImage).toString());

        e->setAttribute ("resourceOver", getImageResource (ib, overImage));
        e->setAttribute ("opacityOver", getImageOpacity (ib, overImage));
        e->setAttribute ("colourOver", getImageColour (ib, overImage).toString());

        e->setAttribute ("resourceDown", getImageResource (ib, downImage));
        e->setAttribute ("opacityDown", getImageOpacity (ib, downImage));
        e->setAttribute ("colourDown", getImageColour (ib, downImage).toString());

        return e;
    }

    bool restoreFromXml (const XmlElement& xml, Component* comp, const ComponentLayout* layout) override
    {
        if (! ButtonHandler::restoreFromXml (xml, comp, layout))
            return false;

        ImageButton* const ib = (ImageButton*) comp;
        ComponentLayout& l = const_cast<ComponentLayout&> (*layout);

        setImageKeepProportions (l, ib, xml.getBoolAttribute ("keepProportions", true), false);

        setImageResource (l, ib, normalImage, xml.getStringAttribute ("resourceNormal", String()), false);
        setImageOpacity (l, ib, normalImage, (float) xml.getDoubleAttribute ("opacityNormal", 1.0f), false);
        setImageColour (l, ib, normalImage, Colour::fromString (xml.getStringAttribute ("colourNormal", "0")), false);

        setImageResource (l, ib, overImage, xml.getStringAttribute ("resourceOver", String()), false);
        setImageOpacity (l, ib, overImage, (float) xml.getDoubleAttribute ("opacityOver", 1.0f), false);
        setImageColour (l, ib, overImage, Colour::fromString (xml.getStringAttribute ("colourOver", "0")), false);

        setImageResource (l, ib, downImage, xml.getStringAttribute ("resourceDown", String()), false);
        setImageOpacity (l, ib, downImage, (float) xml.getDoubleAttribute ("opacityDown", 1.0f), false);
        setImageColour (l, ib, downImage, Colour::fromString (xml.getStringAttribute ("colourDown", "0")), false);

        return true;
    }

    void fillInCreationCode (GeneratedCode& code, Component* component, const String& memberVariableName) override
    {
        ButtonHandler::fillInCreationCode (code, component, memberVariableName);

        ImageButton* const ib = dynamic_cast<ImageButton*> (component);

        String s;

        s << getColourIntialisationCode (component, memberVariableName)
          << '\n';

        const String indent (String::repeatedString (" ", memberVariableName.length() + 13));

        s << memberVariableName << "->setImages (false, true, "
          << CodeHelpers::boolLiteral (doesImageKeepProportions (ib)) << ",\n"
          << indent
          << getImageCreationCode (ib, normalImage) << ", "
          << CodeHelpers::floatLiteral (getImageOpacity (ib, normalImage), 3) << ", "
          << CodeHelpers::colourToCode (getImageColour (ib, normalImage)) << ",\n"
          << indent
          << getImageCreationCode (ib, overImage) << ", "
          << CodeHelpers::floatLiteral (getImageOpacity (ib, overImage), 3) << ", "
          << CodeHelpers::colourToCode (getImageColour (ib, overImage)) << ",\n"
          << indent
          << getImageCreationCode (ib, downImage) << ", "
          << CodeHelpers::floatLiteral (getImageOpacity (ib, downImage), 3) << ", "
          << CodeHelpers::colourToCode (getImageColour (ib, downImage))
          << ");\n";

        code.constructorCode += s;
    }

    static String getImageCreationCode (ImageButton* ib, const ImageRole role)
    {
        const String resName (getImageResource (ib, role));

        if (resName.isEmpty())
            return "juce::Image()";

        return "juce::ImageCache::getFromMemory (" + resName + ", " + resName + "Size)";
    }

    //==============================================================================
    class ImageButtonResourceProperty    : public ImageResourceProperty<ImageButton>
    {
    public:
        ImageButtonResourceProperty (ComponentLayout& layout_, ImageButton* const owner_, const ImageRole role_, const String& name)
            : ImageResourceProperty<ImageButton> (*layout_.getDocument(), owner_, name, true),
              role (role_),
              layout (layout_)
        {
        }

        void setResource (const String& newName)
        {
            setImageResource (layout, element, role, newName, true);
        }

        String getResource() const
        {
            return getImageResource (element, role);
        }

    private:
        const ImageRole role;
        ComponentLayout& layout;
    };

    class SetImageResourceAction   : public ComponentUndoableAction<ImageButton>
    {
    public:
        SetImageResourceAction (ImageButton* const button,
                                ComponentLayout& layout_,
                                const ImageRole role_,
                                const String& newResource_)
            : ComponentUndoableAction<ImageButton> (button, layout_),
              newResource (newResource_),
              role (role_)
        {
            oldResource = ImageButtonHandler::getImageResource (button, role_);
        }

        bool perform() override
        {
            showCorrectTab();
            ImageButtonHandler::setImageResource (layout, getComponent(), role, newResource, false);
            return true;
        }

        bool undo() override
        {
            showCorrectTab();
            ImageButtonHandler::setImageResource (layout, getComponent(), role, oldResource, false);
            return true;
        }

    private:
        String newResource, oldResource;
        const ImageRole role;
    };

    //==============================================================================
    static void setImageResource (ComponentLayout& layout, ImageButton* button, const ImageRole role, const String& newName, const bool undoable)
    {
        jassert (role < 3);

        if (role < 3 && getImageResource (button, role) != newName)
        {
            if (undoable)
            {
                layout.getDocument()->perform (new SetImageResourceAction (button, layout, role, newName),
                                               "Change image resource");
            }
            else
            {
                button->getProperties().set ("resource" + String ((int) role), newName);
                updateButtonImages (*layout.getDocument(), button);
                layout.changed();
            }
        }
    }

    static String getImageResource (ImageButton* button, const ImageRole role)
    {
        jassert (role < 3);
        return button->getProperties() ["resource" + String ((int) role)].toString();
    }

    //==============================================================================
    class SetImageKeepsPropAction   : public ComponentUndoableAction<ImageButton>
    {
    public:
        SetImageKeepsPropAction (ImageButton* const button,
                                 ComponentLayout& layout_,
                                 const bool newState_)
            : ComponentUndoableAction<ImageButton> (button, layout_),
              newState (newState_)
        {
            oldState = ImageButtonHandler::doesImageKeepProportions (button);
        }

        bool perform() override
        {
            showCorrectTab();
            ImageButtonHandler::setImageKeepProportions (layout, getComponent(), newState, false);
            return true;
        }

        bool undo() override
        {
            showCorrectTab();
            ImageButtonHandler::setImageKeepProportions (layout, getComponent(), oldState, false);
            return true;
        }

    private:
        bool newState, oldState;
    };

    static bool doesImageKeepProportions (ImageButton* button)
    {
        return button->getProperties().getWithDefault ("keepImageProp", true);
    }

    static void setImageKeepProportions (ComponentLayout& layout, ImageButton* button, const bool newState, const bool undoable)
    {
        if (undoable)
        {
            layout.perform (new SetImageKeepsPropAction (button, layout, newState), "change imagebutton proportion mode");
        }
        else
        {
            button->getProperties().set ("keepImageProp", newState);
            updateButtonImages (*layout.getDocument(), button);
            layout.changed();
        }
    }

    class ImageButtonProportionProperty    : public ComponentBooleanProperty<ImageButton>
    {
    public:
        ImageButtonProportionProperty (ComponentLayout& layout_, ImageButton* const owner_)
            : ComponentBooleanProperty<ImageButton> ("proportional", "maintain image proportions", "scale to fit",
                                                     owner_, *layout_.getDocument()),
              layout (layout_)
        {
        }

        void setState (bool newState)
        {
            setImageKeepProportions (layout, component, newState, true);
        }

        bool getState() const
        {
            return doesImageKeepProportions (component);
        }

    private:
        ComponentLayout& layout;
    };

    //==============================================================================
    class SetImageOpacityAction   : public ComponentUndoableAction<ImageButton>
    {
    public:
        SetImageOpacityAction (ImageButton* const button,
                               ComponentLayout& layout_,
                               const ImageRole role_,
                               const float newState_)
            : ComponentUndoableAction<ImageButton> (button, layout_),
              role (role_),
              newState (newState_)
        {
            oldState = ImageButtonHandler::getImageOpacity (button, role_);
        }

        bool perform() override
        {
            showCorrectTab();
            ImageButtonHandler::setImageOpacity (layout, getComponent(), role, newState, false);
            return true;
        }

        bool undo() override
        {
            showCorrectTab();
            ImageButtonHandler::setImageOpacity (layout, getComponent(), role, oldState, false);
            return true;
        }

    private:
        const ImageRole role;
        float newState, oldState;
    };

    static float getImageOpacity (ImageButton* button, const ImageRole role)
    {
        return (float) button->getProperties().getWithDefault ("imageOpacity" + String ((int) role), 1.0f);
    }

    static void setImageOpacity (ComponentLayout& layout, ImageButton* button, const ImageRole role, const float opacity, const bool undoable)
    {
        if (undoable)
        {
            layout.perform (new SetImageOpacityAction (button, layout, role, opacity), "change imagebutton opacity");
        }
        else
        {
            button->getProperties().set ("imageOpacity" + String ((int) role), opacity);
            updateButtonImages (*layout.getDocument(), button);
            layout.changed();
        }
    }

    class ImageButtonOpacityProperty    : public SliderPropertyComponent
    {
    public:
        ImageButtonOpacityProperty (ComponentLayout& layout_, ImageButton* const owner_,
                                    const String& name, const ImageRole role_)
            : SliderPropertyComponent (name, 0.0, 1.0, 0.0),
              owner (owner_),
              layout (layout_),
              role (role_)
        {
        }

        void setValue (double newValue) override
        {
            setImageOpacity (layout, owner, role, (float) newValue, true);
        }

        double getValue() const override
        {
            return getImageOpacity (owner, role);
        }

    private:
        ImageButton* const owner;
        ComponentLayout& layout;
        const ImageRole role;
    };

    //==============================================================================
    class SetImageColourAction   : public ComponentUndoableAction<ImageButton>
    {
    public:
        SetImageColourAction (ImageButton* const button,
                              ComponentLayout& layout_,
                              const ImageRole role_,
                              Colour newState_)
            : ComponentUndoableAction<ImageButton> (button, layout_),
              role (role_),
              newState (newState_)
        {
            oldState = ImageButtonHandler::getImageColour (button, role_);
        }

        bool perform() override
        {
            showCorrectTab();
            ImageButtonHandler::setImageColour (layout, getComponent(), role, newState, false);
            return true;
        }

        bool undo() override
        {
            showCorrectTab();
            ImageButtonHandler::setImageColour (layout, getComponent(), role, oldState, false);
            return true;
        }

    private:
        const ImageRole role;
        Colour newState, oldState;
    };

    static Colour getImageColour (ImageButton* button, const ImageRole role)
    {
        return Colour::fromString (button->getProperties().getWithDefault ("imageColour" + String ((int) role), "0").toString());
    }

    static void setImageColour (ComponentLayout& layout, ImageButton* button,
                                const ImageRole role, Colour colour, const bool undoable)
    {
        if (undoable)
        {
            layout.perform (new SetImageColourAction (button, layout, role, colour), "change imagebutton colour");
        }
        else
        {
            button->getProperties().set ("imageColour" + String ((int) role), colour.toString());
            updateButtonImages (*layout.getDocument(), button);
            layout.changed();
        }
    }

    class ImageButtonColourProperty    : public JucerColourPropertyComponent,
                                         public ChangeListener
    {
    public:
        ImageButtonColourProperty (ComponentLayout& layout_, ImageButton* const owner_,
                                   const String& name, const ImageRole role_)
            : JucerColourPropertyComponent (name, false),
              owner (owner_),
              layout (layout_),
              role (role_)
        {
            layout_.getDocument()->addChangeListener (this);
        }

        ~ImageButtonColourProperty()
        {
            layout.getDocument()->removeChangeListener (this);
        }

        void setColour (Colour newColour)
        {
            setImageColour (layout, owner, role, newColour, true);
        }

        Colour getColour() const
        {
            return getImageColour (owner, role);
        }

        void resetToDefault() {}

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

    private:
        ImageButton* const owner;
        ComponentLayout& layout;
        const ImageRole role;
    };

    //==============================================================================
    static void updateButtonImages (JucerDocument& document, ImageButton* const ib)
    {
        Image norm = document.getResources().getImageFromCache (getImageResource (ib, normalImage));
        Image over = document.getResources().getImageFromCache (getImageResource (ib, overImage));
        Image down = document.getResources().getImageFromCache (getImageResource (ib, downImage));

        ib->setImages (false, true, doesImageKeepProportions (ib),
                       norm,
                       getImageOpacity (ib, normalImage),
                       getImageColour (ib, normalImage),
                       over,
                       getImageOpacity (ib, overImage),
                       getImageColour (ib, overImage),
                       down,
                       getImageOpacity (ib, downImage),
                       getImageColour (ib, downImage));
    }
};