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

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2017 - ROLI Ltd.

   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


//==============================================================================
struct ContentViewHeader    : public Component
{
    ContentViewHeader (String headerName, Icon headerIcon)
        : name (headerName), icon (headerIcon)
    {
    }

    void paint (Graphics& g) override
    {
        g.fillAll (findColour (contentHeaderBackgroundColourId));

        auto bounds = getLocalBounds().reduced (20, 0);

        icon.withColour (Colours::white).draw (g, bounds.toFloat().removeFromRight (30), false);

        g.setColour (Colours::white);
        g.setFont (Font (18.0f));
        g.drawFittedText (name, bounds, Justification::centredLeft, 1);
    }

    String name;
    Icon icon;
};

//==============================================================================
class ListBoxHeader    : public Component
{
public:
    ListBoxHeader (Array<String> columnHeaders)
    {
        for (auto s : columnHeaders)
        {
            addAndMakeVisible (headers.add (new Label (s, s)));
            widths.add (1.0f / columnHeaders.size());
        }

        setSize (200, 40);
    }

    ListBoxHeader (Array<String> columnHeaders, Array<float> columnWidths)
    {
        jassert (columnHeaders.size() == columnWidths.size());

        auto index = 0;
        for (auto s : columnHeaders)
        {
            addAndMakeVisible (headers.add (new Label (s, s)));
            widths.add (columnWidths.getUnchecked (index++));
        }

        recalculateWidths();

        setSize (200, 40);
    }

    void resized() override
    {
        auto bounds = getLocalBounds();
        auto width = bounds.getWidth();

        auto index = 0;
        for (auto h : headers)
        {
            auto headerWidth = roundToInt (width * widths.getUnchecked (index));
            h->setBounds (bounds.removeFromLeft (headerWidth));
            ++index;
        }
    }

    void setColumnHeaderWidth (int index, float proportionOfWidth)
    {
        if (! (isPositiveAndBelow (index, headers.size()) && isPositiveAndNotGreaterThan (proportionOfWidth, 1.0f)))
        {
            jassertfalse;
            return;
        }

        widths.set (index, proportionOfWidth);
        recalculateWidths (index);
    }

    int getColumnX (int index)
    {
        auto prop = 0.0f;
        for (int i = 0; i < index; ++i)
            prop += widths.getUnchecked (i);

        return roundToInt (prop * getWidth());
    }

    float getProportionAtIndex (int index)
    {
        jassert (isPositiveAndBelow (index, widths.size()));
        return widths.getUnchecked (index);
    }

private:
    OwnedArray<Label> headers;
    Array<float> widths;

    void recalculateWidths (int indexToIgnore = -1)
    {
        auto total = 0.0f;

        for (auto w : widths)
            total += w;

        if (total == 1.0f)
            return;

        auto diff = 1.0f - total;
        auto amount = diff / static_cast<float> (indexToIgnore == -1 ? widths.size() : widths.size() - 1);

        for (int i = 0; i < widths.size(); ++i)
        {
            if (i != indexToIgnore)
            {
                auto val = widths.getUnchecked (i);
                widths.set (i, val + amount);
            }
        }
    }
};

//==============================================================================
class InfoButton    : public Button
{
public:
    InfoButton (const String& infoToDisplay = {})
        : Button ({})
    {
        if (infoToDisplay.isNotEmpty())
            setInfoToDisplay (infoToDisplay);
    }

    void paintButton (Graphics& g, bool isMouseOverButton, bool isButtonDown) override
    {
        auto bounds = getLocalBounds().toFloat().reduced (2);
        auto& icon = getIcons().info;

        g.setColour (findColour (treeIconColourId).withMultipliedAlpha (isMouseOverButton || isButtonDown ? 1.0f : 0.5f));

        if (isButtonDown)
            g.fillEllipse (bounds);
        else
            g.fillPath (icon, RectanglePlacement (RectanglePlacement::centred)
                        .getTransformToFit (icon.getBounds(), bounds));
    }

    void clicked() override
    {
        auto* w = new InfoWindow (info);
        w->setSize (width, w->getHeight() * numLines + 10);

        CallOutBox::launchAsynchronously (w, getScreenBounds(), nullptr);
    }

    using Button::clicked;

    void setInfoToDisplay (const String& infoToDisplay)
    {
        if (infoToDisplay.isNotEmpty())
        {
            info = infoToDisplay;

            auto stringWidth = roundToInt (Font (14.0f).getStringWidthFloat (info));
            width = jmin (300, stringWidth);

            numLines += static_cast<int> (stringWidth / width);
        }
    }

    void setAssociatedComponent (Component* comp)    { associatedComponent = comp; }
    Component* getAssociatedComponent()              { return associatedComponent; }

private:
    String info;
    Component* associatedComponent = nullptr;
    int width;
    int numLines = 1;

    //==============================================================================
    struct InfoWindow    : public Component
    {
        InfoWindow (const String& s)
            : stringToDisplay (s)
        {
            setSize (150, 14);
        }

        void paint (Graphics& g) override
        {
            g.fillAll (findColour (secondaryBackgroundColourId));

            g.setColour (findColour (defaultTextColourId));
            g.setFont (Font (14.0f));
            g.drawFittedText (stringToDisplay, getLocalBounds(), Justification::centred, 10, 1.0f);
        }

        String stringToDisplay;
    };

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (InfoButton)
};

//==============================================================================
class PropertyGroupComponent  : public Component
{
public:
    PropertyGroupComponent (String name, Icon icon, String desc = {})
        : header (name, icon),
          description (desc)
    {
        addAndMakeVisible (header);

        description.setFont ({ 16.0f });
        description.setColour (getLookAndFeel().findColour (defaultTextColourId));
        description.setLineSpacing (5.0f);
        description.setJustification (Justification::centredLeft);
    }

    void setProperties (const PropertyListBuilder& newProps)
    {
        infoButtons.clear();
        properties.clear();
        properties.addArray (newProps.components);

        for (auto* prop : properties)
        {
            addAndMakeVisible (prop);

            if (! prop->getTooltip().isEmpty())
            {
                addAndMakeVisible (infoButtons.add (new InfoButton (prop->getTooltip())));
                infoButtons.getLast()->setAssociatedComponent (prop);
                prop->setTooltip ({}); // set the tooltip to empty so it only displays when its button is clicked
            }

            if (auto* multiChoice = dynamic_cast<MultiChoicePropertyComponent*> (prop))
            {
                multiChoice->onHeightChange = [this]
                {
                    updateSize (getX(), getY(), getWidth());

                    if (auto* parent = getParentComponent())
                        parent->parentSizeChanged();
                };
            }
        }
    }

    int updateSize (int x, int y, int width)
    {
        header.setBounds (0, 0, width, headerSize);
        auto height = header.getBottom() + 10;

        descriptionLayout.createLayout (description, (float) (width - 40));
        auto descriptionHeight = (int) descriptionLayout.getHeight();

        if (descriptionHeight > 0)
            height += (int) descriptionLayout.getHeight() + 25;

        for (auto* pp : properties)
        {
            auto propertyHeight = pp->getPreferredHeight() + (getHeightMultiplier (pp) * pp->getPreferredHeight());

            InfoButton* buttonToUse = nullptr;
            for (auto* b : infoButtons)
                if (b->getAssociatedComponent() == pp)
                    buttonToUse = b;

            if (buttonToUse != nullptr)
            {
                buttonToUse->setSize (20, 20);
                buttonToUse->setCentrePosition (20, height + (propertyHeight / 2));
            }

            pp->setBounds (40, height, width - 50, propertyHeight);

            if (shouldResizePropertyComponent (pp))
                resizePropertyComponent (pp);

            height += pp->getHeight() + 10;
        }

        height += 16;

        setBounds (x, y, width, jmax (height, getParentHeight()));

        return height;
    }

    void paint (Graphics& g) override
    {
        g.setColour (findColour (secondaryBackgroundColourId));
        g.fillRect (getLocalBounds());

        auto textArea = getLocalBounds().toFloat()
                                        .withTop ((float) headerSize)
                                        .reduced (20.0f, 10.0f)
                                        .withHeight (descriptionLayout.getHeight());
        descriptionLayout.draw (g, textArea);
    }

    OwnedArray<PropertyComponent> properties;

private:
    OwnedArray<InfoButton> infoButtons;
    ContentViewHeader header;
    AttributedString description;
    TextLayout descriptionLayout;
    int headerSize = 40;

    //==============================================================================
    bool shouldResizePropertyComponent (PropertyComponent* p)
    {
        if (auto* textComp = dynamic_cast<TextPropertyComponent*> (p))
            return ! textComp->isTextEditorMultiLine();

        return (dynamic_cast<ChoicePropertyComponent*>  (p) != nullptr
             || dynamic_cast<ButtonPropertyComponent*>  (p) != nullptr
             || dynamic_cast<BooleanPropertyComponent*> (p) != nullptr);
    }

    void resizePropertyComponent (PropertyComponent* pp)
    {
        for (auto i = pp->getNumChildComponents() - 1; i >= 0; --i)
        {
            auto* child = pp->getChildComponent (i);

            auto bounds = child->getBounds();
            child->setBounds (bounds.withSizeKeepingCentre (child->getWidth(), pp->getPreferredHeight()));
        }
    }

    int getHeightMultiplier (PropertyComponent* pp)
    {
        auto availableTextWidth = ProjucerLookAndFeel::getTextWidthForPropertyComponent (pp);

        auto font = ProjucerLookAndFeel::getPropertyComponentFont();
        auto nameWidth = font.getStringWidthFloat (pp->getName());

        if (availableTextWidth == 0)
            return 0;

        return static_cast<int> (nameWidth / availableTextWidth);
    }

    //==============================================================================
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (PropertyGroupComponent)
};