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

   This file is part of the JUCE framework.
   Copyright (c) Raw Material Software Limited

   JUCE is an open source framework subject to commercial or open source
   licensing.

   By downloading, installing, or using the JUCE framework, or combining the
   JUCE framework with any other source code, object code, content or any other
   copyrightable work, you agree to the terms of the JUCE End User Licence
   Agreement, and all incorporated terms including the JUCE Privacy Policy and
   the JUCE Website Terms of Service, as applicable, which will bind you. If you
   do not agree to the terms of these agreements, we will not license the JUCE
   framework to you, and you must discontinue the installation or download
   process and cease use of the JUCE framework.

   JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
   JUCE Privacy Policy: https://juce.com/juce-privacy-policy
   JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/

   Or:

   You may also use this code under the terms of the AGPLv3:
   https://www.gnu.org/licenses/agpl-3.0.en.html

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

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


/**
    Runs the master node, calls the demo to update the canvas, broadcasts those changes
    out to slaves, and shows a view of all the clients to allow them to be dragged around.
*/
struct MasterContentComponent final : public Component,
                                      private Timer,
                                      private OSCSender,
                                      private OSCReceiver,
                                      private OSCReceiver::Listener<OSCReceiver::MessageLoopCallback>
{
    MasterContentComponent (PropertiesFile& props)
        : properties (props)
    {
        setWantsKeyboardFocus (true);
        createAllDemos (demos);
        setContent (0);

        setSize ((int) (15.0f * currentCanvas.getLimits().getWidth()),
                 (int) (15.0f * currentCanvas.getLimits().getHeight()));

        if (! OSCSender::connect (getBroadcastIPAddress(), masterPortNumber))
            error = "Master app OSC sender: network connection error.";

        if (! OSCReceiver::connect (clientPortNumber))
            error = "Master app OSC receiver: network connection error.";

        OSCReceiver::addListener (this);

        startTimerHz (30);
    }

    ~MasterContentComponent() override
    {
        OSCReceiver::removeListener (this);
    }

    //==============================================================================
    struct Client
    {
        String name, ipAddress;
        float widthInches, heightInches;
        Point<float> centre; // in inches
        float scaleFactor;
    };

    Array<Client> clients;

    void addClient (String name, String ipAddress, String areaDescription)
    {
        auto area = Rectangle<float>::fromString (areaDescription);

        if (auto c = getClient (name))
        {
            c->ipAddress = ipAddress;
            c->widthInches = area.getWidth();
            c->heightInches = area.getHeight();
            return;
        }

        DBG (name + "   "  + ipAddress);

        removeClient (name);
        clients.add ({ name, ipAddress, area.getWidth(), area.getHeight(), {}, 1.0f });

        String lastX = properties.getValue ("lastX_" + name);
        String lastY = properties.getValue ("lastY_" + name);
        String lastScale = properties.getValue ("scale_" + name);

        if (lastX.isEmpty() || lastY.isEmpty())
            setClientCentre (name, { Random().nextFloat() * 10.0f,
                                     Random().nextFloat() * 10.0f });
        else
            setClientCentre (name, Point<float> (lastX.getFloatValue(),
                                                 lastY.getFloatValue()));

        if (lastScale.isNotEmpty())
            setClientScale (name, lastScale.getFloatValue());
        else
            setClientScale (name, 1.0f);

        updateDeviceComponents();
    }

    void removeClient (String name)
    {
        for (int i = clients.size(); --i >= 0;)
            if (clients.getReference (0).name == name)
                clients.remove (i);

        updateDeviceComponents();
    }

    void setClientCentre (const String& name, Point<float> newCentre)
    {
        if (auto c = getClient (name))
        {
            newCentre = currentCanvas.getLimits().getConstrainedPoint (newCentre);
            c->centre = newCentre;

            properties.setValue ("lastX_" + name, String (newCentre.x));
            properties.setValue ("lastY_" + name, String (newCentre.y));

            startTimer (1);
        }
    }

    float getClientScale (const String& name) const
    {
        if (auto c = getClient (name))
            return c->scaleFactor;

        return 1.0f;
    }

    void setClientScale (const String& name, float newScale)
    {
        if (auto c = getClient (name))
        {
            c->scaleFactor = jlimit (0.5f, 2.0f, newScale);
            properties.setValue ("scale_" + name, String (newScale));
        }
    }

    Point<float> getClientCentre (const String& name) const
    {
        if (auto c = getClient (name))
            return c->centre;

        return {};
    }

    Rectangle<float> getClientArea (const String& name) const
    {
        if (auto c = getClient (name))
            return Rectangle<float> (c->widthInches, c->heightInches)
                     .withCentre (c->centre);

        return {};
    }

    Rectangle<float> getActiveCanvasArea() const
    {
        Rectangle<float> r;

        if (clients.size() > 0)
            r = Rectangle<float> (1.0f, 1.0f).withCentre (clients.getReference (0).centre);

        for (int i = 1; i < clients.size(); ++i)
            r = r.getUnion (Rectangle<float> (1.0f, 1.0f).withCentre (clients.getReference (i).centre));

        return r.expanded (6.0f);
    }

    int getContentIndex() const
    {
        return demos.indexOf (content);
    }

    void setContent (int demoIndex)
    {
        content = demos[demoIndex];

        if (content != nullptr)
            content->reset();
    }

    bool keyPressed (const KeyPress& key) override
    {
        if (key == KeyPress::spaceKey || key == KeyPress::rightKey || key == KeyPress::downKey)
        {
            setContent ((getContentIndex() + 1) % demos.size());
            return true;
        }

        if (key == KeyPress::upKey || key == KeyPress::leftKey)
        {
            setContent ((getContentIndex() + demos.size() - 1) % demos.size());
            return true;
        }

        return Component::keyPressed (key);
    }

private:
    //==============================================================================
    void paint (Graphics& g) override
    {
        g.fillAll (Colours::black);

        currentCanvas.draw (g, getLocalBounds().toFloat(), currentCanvas.getLimits());

        if (error.isNotEmpty())
        {
            g.setColour (Colours::red);
            g.setFont (20.0f);
            g.drawText (error, getLocalBounds().reduced (10).removeFromBottom (80),
                        Justification::centredRight, true);
        }

        if (content != nullptr)
        {
            g.setColour (Colours::white);
            g.setFont (17.0f);
            g.drawText ("Demo: " + content->getName(),
                        getLocalBounds().reduced (10).removeFromTop (30),
                        Justification::centredLeft, true);
        }
    }

    void resized() override
    {
        updateDeviceComponents();
    }

    void updateDeviceComponents()
    {
        for (int i = devices.size(); --i >= 0;)
            if (getClient (devices.getUnchecked (i)->getName()) == nullptr)
                devices.remove (i);

        for (const auto& c : clients)
            if (getDeviceComponent (c.name) == nullptr)
                addAndMakeVisible (devices.add (new DeviceComponent (*this, c.name)));

        for (auto d : devices)
            d->setBounds (virtualSpaceToLocal (getClientArea (d->getName())).getSmallestIntegerContainer());
    }

    Point<float> virtualSpaceToLocal (Point<float> p) const
    {
        auto total = currentCanvas.getLimits();

        return { (float) getWidth()  * (p.x - total.getX()) / total.getWidth(),
                 (float) getHeight() * (p.y - total.getY()) / total.getHeight() };
    }

    Rectangle<float> virtualSpaceToLocal (Rectangle<float> p) const
    {
        return { virtualSpaceToLocal (p.getTopLeft()),
                 virtualSpaceToLocal (p.getBottomRight()) };
    }

    Point<float> localSpaceToVirtual (Point<float> p) const
    {
        auto total = currentCanvas.getLimits();

        return { total.getX() + total.getWidth()  * (p.x / (float) getWidth()),
                 total.getY() + total.getHeight() * (p.y / (float) getHeight()) };
    }

    //==============================================================================
    struct DeviceComponent final : public Component
    {
        DeviceComponent (MasterContentComponent& e, String name)
            : Component (name), editor (e)
        {
            setMouseCursor (MouseCursor::DraggingHandCursor);
        }

        void paint (Graphics& g) override
        {
            g.fillAll (Colours::blue.withAlpha (0.4f));

            g.setColour (Colours::white);
            g.setFont (11.0f);
            g.drawFittedText (getName(), getLocalBounds(), Justification::centred, 2);
        }

        void mouseDown (const MouseEvent&) override
        {
            dragStartLocation = editor.getClientCentre (getName());
        }

        void mouseDrag (const MouseEvent& e) override
        {
            editor.setClientCentre (getName(), dragStartLocation
                                                + editor.localSpaceToVirtual (e.getPosition().toFloat())
                                                - editor.localSpaceToVirtual (e.getMouseDownPosition().toFloat()));
        }

        void mouseWheelMove (const MouseEvent&, const MouseWheelDetails& e) override
        {
            editor.setClientScale (getName(), editor.getClientScale (getName()) + 0.1f * e.deltaY);
        }

        void mouseDoubleClick (const MouseEvent&) override
        {
            editor.setClientScale (getName(), 1.0f);
        }

        MasterContentComponent& editor;
        Point<float> dragStartLocation;
        Rectangle<float> clientArea;
    };

    DeviceComponent* getDeviceComponent (const String& name) const
    {
        for (auto d : devices)
            if (d->getName() == name)
                return d;

        return nullptr;
    }

    //==============================================================================
    void broadcastNewCanvasState (const MemoryBlock& canvasData)
    {
        BlockPacketiser packetiser;
        packetiser.createBlocksFromData (canvasData, 1000);

        for (const auto& client : clients)
            for (auto& b : packetiser.blocks)
                sendToIPAddress (client.ipAddress, masterPortNumber, canvasStateOSCAddress, b);
    }

    void timerCallback() override
    {
        startTimerHz (30);

        currentCanvas.reset();
        updateCanvasInfo (currentCanvas);

        {
            std::unique_ptr<CanvasGeneratingContext> context (new CanvasGeneratingContext (currentCanvas));
            Graphics g (*context);

            if (content != nullptr)
                content->generateCanvas (g, currentCanvas, getActiveCanvasArea());
        }

        broadcastNewCanvasState (currentCanvas.toMemoryBlock());

        updateDeviceComponents();
        repaint();
    }

    void updateCanvasInfo (SharedCanvasDescription& canvas)
    {
        canvas.backgroundColour = Colours::black;

        for (const auto& c : clients)
            canvas.clients.add ({ c.name, c.centre, c.scaleFactor });
    }

    const Client* getClient (const String& name) const
    {
        for (auto& c : clients)
            if (c.name == name)
                return &c;

        return nullptr;
    }

    Client* getClient (const String& name)
    {
        return const_cast<Client*> (static_cast<const MasterContentComponent&> (*this).getClient (name));
    }

    //==============================================================================
    void oscMessageReceived (const OSCMessage& message) override
    {
        auto address = message.getAddressPattern();

        if (address.matches (newClientOSCAddress))       newClientOSCMessageReceived (message);
        else if (address.matches (userInputOSCAddress))  userInputOSCMessageReceived (message);
    }

    void newClientOSCMessageReceived (const OSCMessage& message)
    {
        if (message.isEmpty() || ! message[0].isString())
            return;

        StringArray tokens = StringArray::fromTokens (message[0].getString(), ":", "");
        addClient (tokens[0], tokens[1], tokens[2]);
    }

    void userInputOSCMessageReceived (const OSCMessage& message)
    {
        if (message.size() == 3 && message[0].isString() && message[1].isFloat32() && message[2].isFloat32())
        {
            content->handleTouch ({ message[1].getFloat32(),
                                    message[2].getFloat32() });
        }
    }

    //==============================================================================
    AnimatedContent* content = nullptr;
    PropertiesFile& properties;
    OwnedArray<DeviceComponent> devices;
    SharedCanvasDescription currentCanvas;
    String error;

    OwnedArray<AnimatedContent> demos;

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MasterContentComponent)
};