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

   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 "../Plugins/IOConfigurationWindow.h"

class PluginGraph;

/**
    A window that shows a log of parameter change messages sent by the plugin.
*/
class PluginDebugWindow : public AudioProcessorEditor,
                          public AudioProcessorParameter::Listener,
                          public ListBoxModel,
                          public AsyncUpdater
{
public:
    PluginDebugWindow (AudioProcessor& proc)
        : AudioProcessorEditor (proc), audioProc (proc)
    {
        setSize (500, 200);
        addAndMakeVisible (list);

        for (auto* p : audioProc.getParameters())
            p->addListener (this);

        log.add ("Parameter debug log started");
    }

    void parameterValueChanged (int parameterIndex, float newValue) override
    {
        auto* param = audioProc.getParameters()[parameterIndex];
        auto value = param->getCurrentValueAsText().quoted() + " (" + String (newValue, 4) + ")";

        appendToLog ("parameter change", *param, value);
    }

    void parameterGestureChanged (int parameterIndex, bool gestureIsStarting) override
    {
        auto* param = audioProc.getParameters()[parameterIndex];
        appendToLog ("gesture", *param, gestureIsStarting ? "start" : "end");
    }

private:
    void appendToLog (StringRef action, AudioProcessorParameter& param, StringRef value)
    {
        String entry (action + " " + param.getName (30).quoted() + " [" + String (param.getParameterIndex()) + "]: " + value);

        {
            ScopedLock lock (pendingLogLock);
            pendingLogEntries.add (entry);
        }

        triggerAsyncUpdate();
    }

    void resized() override
    {
        list.setBounds(getLocalBounds());
    }

    int getNumRows() override
    {
        return log.size();
    }

    void paintListBoxItem (int rowNumber, Graphics& g, int width, int height, bool) override
    {
        g.setColour (getLookAndFeel().findColour (TextEditor::textColourId));

        if (isPositiveAndBelow (rowNumber, log.size()))
            g.drawText (log[rowNumber], Rectangle<int> { 0, 0, width, height }, Justification::left, true);
    }

    void handleAsyncUpdate() override
    {
        if (log.size() > logSizeTrimThreshold)
            log.removeRange (0, log.size() - maxLogSize);

        {
            ScopedLock lock (pendingLogLock);
            log.addArray (pendingLogEntries);
            pendingLogEntries.clear();
        }

        list.updateContent();
        list.scrollToEnsureRowIsOnscreen (log.size() - 1);
    }

    constexpr static const int maxLogSize = 300;
    constexpr static const int logSizeTrimThreshold = 400;

    ListBox list { "Log", this };

    StringArray log;
    StringArray pendingLogEntries;
    CriticalSection pendingLogLock;

    AudioProcessor& audioProc;
};

//==============================================================================
/**
    A desktop window containing a plugin's GUI.
*/
class PluginWindow  : public DocumentWindow
{
public:
    enum class Type
    {
        normal = 0,
        generic,
        programs,
        audioIO,
        debug,
        numTypes
    };

    PluginWindow (AudioProcessorGraph::Node* n, Type t, OwnedArray<PluginWindow>& windowList)
       : DocumentWindow (n->getProcessor()->getName(),
                         LookAndFeel::getDefaultLookAndFeel().findColour (ResizableWindow::backgroundColourId),
                         DocumentWindow::minimiseButton | DocumentWindow::closeButton),
         activeWindowList (windowList),
         node (n), type (t)
    {
        setSize (400, 300);

        if (auto* ui = createProcessorEditor (*node->getProcessor(), type))
            setContentOwned (ui, true);

       #if JUCE_IOS || JUCE_ANDROID
        auto screenBounds = Desktop::getInstance().getDisplays().getTotalBounds (true).toFloat();
        auto scaleFactor = jmin ((screenBounds.getWidth() - 50) / getWidth(), (screenBounds.getHeight() - 50) / getHeight());

        if (scaleFactor < 1.0f)
            setSize ((int) (getWidth() * scaleFactor), (int) (getHeight() * scaleFactor));

        setTopLeftPosition (20, 20);
       #else
        setTopLeftPosition (node->properties.getWithDefault (getLastXProp (type), Random::getSystemRandom().nextInt (500)),
                            node->properties.getWithDefault (getLastYProp (type), Random::getSystemRandom().nextInt (500)));
       #endif

        node->properties.set (getOpenProp (type), true);

        setVisible (true);
    }

    ~PluginWindow() override
    {
        clearContentComponent();
    }

    void moved() override
    {
        node->properties.set (getLastXProp (type), getX());
        node->properties.set (getLastYProp (type), getY());
    }

    void closeButtonPressed() override
    {
        node->properties.set (getOpenProp (type), false);
        activeWindowList.removeObject (this);
    }

    static String getLastXProp (Type type)    { return "uiLastX_" + getTypeName (type); }
    static String getLastYProp (Type type)    { return "uiLastY_" + getTypeName (type); }
    static String getOpenProp  (Type type)    { return "uiopen_"  + getTypeName (type); }

    OwnedArray<PluginWindow>& activeWindowList;
    const AudioProcessorGraph::Node::Ptr node;
    const Type type;

private:
    float getDesktopScaleFactor() const override     { return 1.0f; }

    static AudioProcessorEditor* createProcessorEditor (AudioProcessor& processor,
                                                        PluginWindow::Type type)
    {
        if (type == PluginWindow::Type::normal)
        {
            if (auto* ui = processor.createEditorIfNeeded())
                return ui;

            type = PluginWindow::Type::generic;
        }

        if (type == PluginWindow::Type::generic)  return new GenericAudioProcessorEditor (processor);
        if (type == PluginWindow::Type::programs) return new ProgramAudioProcessorEditor (processor);
        if (type == PluginWindow::Type::audioIO)  return new IOConfigurationWindow (processor);
        if (type == PluginWindow::Type::debug)    return new PluginDebugWindow (processor);

        jassertfalse;
        return {};
    }

    static String getTypeName (Type type)
    {
        switch (type)
        {
            case Type::normal:     return "Normal";
            case Type::generic:    return "Generic";
            case Type::programs:   return "Programs";
            case Type::audioIO:    return "IO";
            case Type::debug:      return "Debug";
            case Type::numTypes:
            default:               return {};
        }
    }

    //==============================================================================
    struct ProgramAudioProcessorEditor  : public AudioProcessorEditor
    {
        ProgramAudioProcessorEditor (AudioProcessor& p)  : AudioProcessorEditor (p)
        {
            setOpaque (true);

            addAndMakeVisible (panel);

            Array<PropertyComponent*> programs;

            auto numPrograms = p.getNumPrograms();
            int totalHeight = 0;

            for (int i = 0; i < numPrograms; ++i)
            {
                auto name = p.getProgramName (i).trim();

                if (name.isEmpty())
                    name = "Unnamed";

                auto pc = new PropertyComp (name, p);
                programs.add (pc);
                totalHeight += pc->getPreferredHeight();
            }

            panel.addProperties (programs);

            setSize (400, jlimit (25, 400, totalHeight));
        }

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

        void resized() override
        {
            panel.setBounds (getLocalBounds());
        }

    private:
        struct PropertyComp  : public PropertyComponent,
                               private AudioProcessorListener
        {
            PropertyComp (const String& name, AudioProcessor& p)  : PropertyComponent (name), owner (p)
            {
                owner.addListener (this);
            }

            ~PropertyComp() override
            {
                owner.removeListener (this);
            }

            void refresh() override {}
            void audioProcessorChanged (AudioProcessor*) override {}
            void audioProcessorParameterChanged (AudioProcessor*, int, float) override {}

            AudioProcessor& owner;

            JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (PropertyComp)
        };

        PropertyPanel panel;

        JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ProgramAudioProcessorEditor)
    };

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (PluginWindow)
};