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

   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 "../UI/jucer_PaintRoutineEditor.h"
#include "../UI/jucer_ComponentLayoutEditor.h"

//==============================================================================
/**
    Base class for a property that edits the x, y, w, or h of a PositionedRectangle.
*/
class PositionPropertyBase  : public PropertyComponent,
                              protected ChangeListener
{
public:
    enum ComponentPositionDimension
    {
        componentX          = 0,
        componentY          = 1,
        componentWidth      = 2,
        componentHeight     = 3
    };

    PositionPropertyBase (Component* comp,
                          const String& name,
                          ComponentPositionDimension dimension_,
                          const bool includeAnchorOptions_,
                          const bool allowRelativeOptions_,
                          ComponentLayout* layout_)
        : PropertyComponent (name),
          layout (layout_),
          button ("mode"),
          component (comp),
          dimension (dimension_),
          includeAnchorOptions (includeAnchorOptions_),
          allowRelativeOptions (allowRelativeOptions_)
    {
        addAndMakeVisible (button);
        button.setTriggeredOnMouseDown (true);
        button.setConnectedEdges (TextButton::ConnectedOnLeft | TextButton::ConnectedOnRight);
        button.onClick = [this]
        {
            if (showMenu (layout))
                refresh(); // (to clear the text editor if it's got focus)
        };

        textEditor.reset (new PositionPropLabel (*this));
        addAndMakeVisible (textEditor.get());
    }

    String getText() const
    {
        RelativePositionedRectangle rpr (getPosition());
        PositionedRectangle& p = rpr.rect;
        String s;

        switch (dimension)
        {
        case componentX:
            if (p.getPositionModeX() == PositionedRectangle::proportionOfParentSize)
                s << valueToString (p.getX() * 100.0) << '%';
            else
                s << valueToString (p.getX());
            break;

        case componentY:
            if (p.getPositionModeY() == PositionedRectangle::proportionOfParentSize)
                s << valueToString (p.getY() * 100.0) << '%';
            else
                s << valueToString (p.getY());
            break;

        case componentWidth:
            if (p.getWidthMode() == PositionedRectangle::proportionalSize)
                s << valueToString (p.getWidth() * 100.0) << '%';
            else
                s << valueToString (p.getWidth());
            break;

        case componentHeight:
            if (p.getHeightMode() == PositionedRectangle::proportionalSize)
                s << valueToString (p.getHeight() * 100.0) << '%';
            else
                s << valueToString (p.getHeight());
            break;

        default:
            jassertfalse;
            break;
        };

        return s;
    }

    static String valueToString (const double n)
    {
        return String (roundToInt (n * 1000.0) / 1000.0);
    }

    void setText (const String& newText)
    {
        RelativePositionedRectangle rpr (getPosition());
        PositionedRectangle p (rpr.rect);
        const double value = newText.getDoubleValue();

        switch (dimension)
        {
        case componentX:
            if (p.getPositionModeX() == PositionedRectangle::proportionOfParentSize)
                p.setX (value / 100.0);
            else
                p.setX (value);
            break;

        case componentY:
            if (p.getPositionModeY() == PositionedRectangle::proportionOfParentSize)
                p.setY (value / 100.0);
            else
                p.setY (value);
            break;

        case componentWidth:
            if (p.getWidthMode() == PositionedRectangle::proportionalSize)
                p.setWidth (value / 100.0);
            else
                p.setWidth (value);
            break;

        case componentHeight:
            if (p.getHeightMode() == PositionedRectangle::proportionalSize)
                p.setHeight (value / 100.0);
            else
                p.setHeight (value);
            break;

        default:
            jassertfalse;
            break;
        };

        if (p != rpr.rect)
        {
            rpr.rect = p;
            setPosition (rpr);
        }
    }

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

    bool showMenu (ComponentLayout* compLayout)
    {
        RelativePositionedRectangle rpr (getPosition());
        PositionedRectangle p (rpr.rect);

        PositionedRectangle::AnchorPoint xAnchor = p.getAnchorPointX();
        PositionedRectangle::AnchorPoint yAnchor = p.getAnchorPointY();
        PositionedRectangle::PositionMode xMode = p.getPositionModeX();
        PositionedRectangle::PositionMode yMode = p.getPositionModeY();
        PositionedRectangle::SizeMode sizeW = p.getWidthMode();
        PositionedRectangle::SizeMode sizeH = p.getHeightMode();

        String relCompName ("parent");

        if (Component* const relComp = compLayout != nullptr ? compLayout->getComponentRelativePosTarget (component, (int) dimension)
                                                             : nullptr)
            relCompName = compLayout->getComponentMemberVariableName (relComp);

        jassert (relCompName.isNotEmpty());

        PopupMenu m;

        if (dimension == componentX || dimension == componentY)
        {
            const PositionedRectangle::PositionMode posMode = (dimension == componentX) ? xMode : yMode;

            m.addItem (10, ((dimension == componentX) ? "Absolute distance from left of "
                                                      : "Absolute distance from top of ") + relCompName,
                       true, posMode == PositionedRectangle::absoluteFromParentTopLeft);

            m.addItem (11, ((dimension == componentX) ? "Absolute distance from right of "
                                                      : "Absolute distance from bottom of ") + relCompName,
                       true, posMode == PositionedRectangle::absoluteFromParentBottomRight);

            m.addItem (12, "Absolute distance from centre of " + relCompName,
                       true, posMode == PositionedRectangle::absoluteFromParentCentre);

            m.addItem (13, ((dimension == componentX) ? "Percentage of width of "
                                                      : "Percentage of height of ") + relCompName,
                       true, posMode == PositionedRectangle::proportionOfParentSize);

            m.addSeparator();

            if (includeAnchorOptions)
            {
                const PositionedRectangle::AnchorPoint anchor = (dimension == componentX) ? xAnchor : yAnchor;

                m.addItem (14, (dimension == componentX) ? "Anchored at left of component"
                                                         : "Anchored at top of component",
                           true, anchor == PositionedRectangle::anchorAtLeftOrTop);

                m.addItem (15, "Anchored at centre of component", true, anchor == PositionedRectangle::anchorAtCentre);

                m.addItem (16, (dimension == componentX) ? "Anchored at right of component"
                                                         : "Anchored at bottom of component",
                           true, anchor == PositionedRectangle::anchorAtRightOrBottom);
            }
        }
        else
        {
            const PositionedRectangle::SizeMode sizeMode = (dimension == componentWidth) ? sizeW : sizeH;

            m.addItem (20, (dimension == componentWidth) ? "Absolute width"
                                                         : "Absolute height",
                       true, sizeMode == PositionedRectangle::absoluteSize);

            m.addItem (21, ((dimension == componentWidth) ? "Percentage of width of "
                                                          : "Percentage of height of ") + relCompName,
                       true, sizeMode == PositionedRectangle::proportionalSize);

            m.addItem (22, ((dimension == componentWidth) ? "Subtracted from width of "
                                                          : "Subtracted from height of ") + relCompName,
                       true, sizeMode == PositionedRectangle::parentSizeMinusAbsolute);
        }


        if (allowRelativeOptions && compLayout != nullptr)
        {
            m.addSeparator();
            m.addSubMenu ("Relative to", compLayout->getRelativeTargetMenu (component, (int) dimension));
        }

        WeakReference<Component> ref (this);

        const int menuResult = m.showAt (&button);

        if (menuResult == 0 || ref == nullptr)
            return false;

        switch (menuResult)
        {
        case 10:
            if (dimension == componentX)
                xMode = PositionedRectangle::absoluteFromParentTopLeft;
            else
                yMode = PositionedRectangle::absoluteFromParentTopLeft;
            break;

        case 11:
            if (dimension == componentX)
                xMode = PositionedRectangle::absoluteFromParentBottomRight;
            else
                yMode = PositionedRectangle::absoluteFromParentBottomRight;
            break;

        case 12:
            if (dimension == componentX)
                xMode = PositionedRectangle::absoluteFromParentCentre;
            else
                yMode = PositionedRectangle::absoluteFromParentCentre;
            break;

        case 13:
            if (dimension == componentX)
                xMode = PositionedRectangle::proportionOfParentSize;
            else
                yMode = PositionedRectangle::proportionOfParentSize;
            break;

        case 14:
            if (dimension == componentX)
                xAnchor = PositionedRectangle::anchorAtLeftOrTop;
            else
                yAnchor = PositionedRectangle::anchorAtLeftOrTop;
            break;

        case 15:
            if (dimension == componentX)
                xAnchor = PositionedRectangle::anchorAtCentre;
            else
                yAnchor = PositionedRectangle::anchorAtCentre;
            break;

        case 16:
            if (dimension == componentX)
                xAnchor = PositionedRectangle::anchorAtRightOrBottom;
            else
                yAnchor = PositionedRectangle::anchorAtRightOrBottom;
            break;

        case 20:
            if (dimension == componentWidth)
                sizeW = PositionedRectangle::absoluteSize;
            else
                sizeH = PositionedRectangle::absoluteSize;
            break;

        case 21:
            if (dimension == componentWidth)
                sizeW = PositionedRectangle::proportionalSize;
            else
                sizeH = PositionedRectangle::proportionalSize;
            break;

        case 22:
            if (dimension == componentWidth)
                sizeW = PositionedRectangle::parentSizeMinusAbsolute;
            else
                sizeH = PositionedRectangle::parentSizeMinusAbsolute;
            break;

        default:
            if (allowRelativeOptions && compLayout != nullptr)
                compLayout->processRelativeTargetMenuResult (component, (int) dimension, menuResult);
            break;
        }

        Rectangle<int> parentArea;

        if (component->findParentComponentOfClass<ComponentLayoutEditor>() != nullptr)
            parentArea.setSize (component->getParentWidth(), component->getParentHeight());
        else if (auto pre = dynamic_cast<PaintRoutineEditor*> (component->getParentComponent()))
            parentArea = pre->getComponentArea();
        else
            jassertfalse;

        int x, xw, y, yh, w, h;
        rpr.getRelativeTargetBounds (parentArea, compLayout, x, xw, y, yh, w, h);

        PositionedRectangle xyRect (p);
        PositionedRectangle whRect (p);

        xyRect.setModes (xAnchor, xMode, yAnchor, yMode, sizeW, sizeH,
                         Rectangle<int> (x, y, xw, yh));

        whRect.setModes (xAnchor, xMode, yAnchor, yMode, sizeW, sizeH,
                         Rectangle<int> (x, y, w, h));

        p.setModes (xAnchor, xMode, yAnchor, yMode, sizeW, sizeH,
                    Rectangle<int> (x, y, xw, yh));

        p.setX (xyRect.getX());
        p.setY (xyRect.getY());
        p.setWidth (whRect.getWidth());
        p.setHeight (whRect.getHeight());

        if (p != rpr.rect)
        {
            rpr.rect = p;
            setPosition (rpr);
        }

        return true;
    }

    void resized()
    {
        const Rectangle<int> r (getLookAndFeel().getPropertyComponentContentPosition (*this));

        button.changeWidthToFitText (r.getHeight());
        button.setTopRightPosition (r.getRight(), r.getY());

        textEditor->setBounds (r.getX(), r.getY(), button.getX() - r.getX(), r.getHeight());
    }

    void refresh()
    {
        textEditor->setText (getText(), dontSendNotification);
    }

    void textWasEdited()
    {
        const String newText (textEditor->getText());
        if (getText() != newText)
            setText (newText);
    }

    //==============================================================================
    virtual void setPosition (const RelativePositionedRectangle& newPos) = 0;

    virtual RelativePositionedRectangle getPosition() const = 0;

protected:
    class PositionPropLabel  : public Label
    {
        PositionPropertyBase& owner;

    public:
        PositionPropLabel (PositionPropertyBase& owner_)
            : Label (String(), String()),
              owner (owner_)
        {
            setEditable (true, true, false);
            lookAndFeelChanged();
        }

        TextEditor* createEditorComponent() override
        {
            TextEditor* ed = Label::createEditorComponent();
            ed->setInputRestrictions (14, "0123456789.-%");

            return ed;
        }

        void textWasEdited() override
        {
            owner.textWasEdited();
        }

        void lookAndFeelChanged() override
        {
            setColour (backgroundColourId, findColour (widgetBackgroundColourId));
            setColour (textColourId, findColour (widgetTextColourId));
        }
    };

    ComponentLayout* layout;
    std::unique_ptr<PositionPropLabel> textEditor;
    TextButton button;

    Component* component;
    ComponentPositionDimension dimension;
    const bool includeAnchorOptions, allowRelativeOptions;
};