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

   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 JucerColourPropertyComponent  : public PropertyComponent
{
public:
    JucerColourPropertyComponent (const String& name,
                                  const bool canReset)
        : PropertyComponent (name)
    {
        colourPropEditor.reset (new ColourPropEditorComponent (this, canReset));
        addAndMakeVisible (colourPropEditor.get());
    }

    virtual void setColour (Colour newColour) = 0;
    virtual Colour getColour() const = 0;
    virtual void resetToDefault() = 0;

    void refresh() override
    {
        ((ColourPropEditorComponent*) getChildComponent (0))->refresh();
    }

    class ColourEditorComponent    : public Component,
                                     public ChangeListener
    {
    public:
        ColourEditorComponent (const bool canReset)
            : canResetToDefault (canReset)
        {
        }

        void paint (Graphics& g) override
        {
            g.fillAll (Colours::grey);

            g.fillCheckerBoard (getLocalBounds().reduced (2, 2).toFloat(),
                                10.0f, 10.0f,
                                Colour (0xffdddddd).overlaidWith (colour),
                                Colour (0xffffffff).overlaidWith (colour));

            g.setColour (Colours::white.overlaidWith (colour).contrasting());
            g.setFont (Font (getHeight() * 0.6f, Font::bold));
            g.drawFittedText (colour.toDisplayString (true),
                              2, 1, getWidth() - 4, getHeight() - 1,
                              Justification::centred, 1);
        }

        virtual void setColour (Colour newColour) = 0;
        virtual void resetToDefault() = 0;
        virtual Colour getColour() const = 0;

        void refresh()
        {
            const Colour col (getColour());

            if (col != colour)
            {
                colour = col;
                repaint();
            }
        }

        void mouseDown (const MouseEvent&) override
        {
            CallOutBox::launchAsynchronously (new ColourSelectorComp (this, canResetToDefault),
                                              getScreenBounds(), nullptr);
        }

        void changeListenerCallback (ChangeBroadcaster* source) override
        {
            const ColourSelector* const cs = (const ColourSelector*) source;

            if (cs->getCurrentColour() != getColour())
                setColour (cs->getCurrentColour());
        }

        class ColourSelectorComp   : public Component
        {
        public:
            ColourSelectorComp (ColourEditorComponent* owner_,
                                const bool canReset)
                : owner (owner_),
                  defaultButton ("Reset to Default")
            {
                addAndMakeVisible (selector);
                selector.setName ("Colour");
                selector.setCurrentColour (owner->getColour());
                selector.addChangeListener (owner);

                if (canReset)
                {
                    addAndMakeVisible (defaultButton);

                    defaultButton.onClick = [this]
                    {
                        owner->resetToDefault();
                        owner->refresh();
                        selector.setCurrentColour (owner->getColour());
                    };
                }

                setSize (300, 400);
            }

            void resized() override
            {
                if (defaultButton.isVisible())
                {
                    selector.setBounds (0, 0, getWidth(), getHeight() - 30);
                    defaultButton.changeWidthToFitText (22);
                    defaultButton.setTopLeftPosition (10, getHeight() - 26);
                }
                else
                {
                    selector.setBounds (getLocalBounds());
                }
            }

        private:
            class ColourSelectorWithSwatches    : public ColourSelector
            {
            public:
                ColourSelectorWithSwatches()
                {
                }

                int getNumSwatches() const override
                {
                    return getAppSettings().swatchColours.size();
                }

                Colour getSwatchColour (int index) const override
                {
                    return getAppSettings().swatchColours [index];
                }

                void setSwatchColour (int index, const Colour& newColour) override
                {
                    getAppSettings().swatchColours.set (index, newColour);
                }
            };

            ColourEditorComponent* owner;
            ColourSelectorWithSwatches selector;
            TextButton defaultButton;
        };

    private:
        Colour colour;
        bool canResetToDefault;
    };

    class ColourPropEditorComponent     : public ColourEditorComponent
    {
        JucerColourPropertyComponent* const owner;

    public:
        ColourPropEditorComponent (JucerColourPropertyComponent* const owner_,
                                   const bool canReset)
            : ColourEditorComponent (canReset),
              owner (owner_)
        {}

        void setColour (Colour newColour) override
        {
            owner->setColour (newColour);
        }

        Colour getColour() const override
        {
            return owner->getColour();
        }

        void resetToDefault() override
        {
            owner->resetToDefault();
        }
    };

    std::unique_ptr<ColourPropEditorComponent> colourPropEditor;
};