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

   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


//==============================================================================
struct LiveBuildSettingsComponent  : public Component
{
    LiveBuildSettingsComponent (Project& p)
    {
        addAndMakeVisible (&group);

        PropertyListBuilder props;
        p.getCompileEngineSettings().getLiveSettings (props);

        group.setProperties (props);
        group.setName ("Live Build Settings");
    }

    void resized() override
    {
        group.updateSize (12, 0, getWidth() - 24);
        group.setBounds (getLocalBounds().reduced (12, 0));
    }

    void parentSizeChanged() override
    {
        auto width = jmax (550, getParentWidth());
        auto y = group.updateSize (12, 0, width - 12);

        y = jmax (getParentHeight(), y);

        setSize (width, y);
    }

    PropertyGroupComponent group { "Live Build Settings", Icon (getIcons().settings, Colours::transparentBlack) };

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (LiveBuildSettingsComponent)
};

//==============================================================================
class LiveBuildTab    : public Component,
                        private ChangeListener
{
public:
    LiveBuildTab (const CompileEngineChildProcess::Ptr& child, String lastErrorMessage)
    {
        addAndMakeVisible (settingsButton);
        settingsButton.onClick = [this]
        {
            if (auto* pcc = findParentComponentOfClass<ProjectContentComponent>())
                pcc->showLiveBuildSettings();
        };

        if (child != nullptr)
        {
            addAndMakeVisible (concertinaPanel);
            buildConcertina (*child);
            isEnabled = true;
        }
        else
        {
            errorMessage = getErrorMessage();
            errorMessageLabel.reset (new Label ("Error", errorMessage));
            errorMessageLabel->setJustificationType (Justification::centred);
            errorMessageLabel->setFont (Font (12.0f));
            errorMessageLabel->setMinimumHorizontalScale (1.0f);

            addAndMakeVisible (errorMessageLabel.get());

            if (showDownloadButton)
            {
                downloadButton.reset (new TextButton ("Download"));
                addAndMakeVisible (downloadButton.get());
                downloadButton->onClick = [this] { downloadDLL(); };
            }

            if (showEnableButton)
            {
                String buttonText ("Enable Now");

                if (! lastErrorMessage.isEmpty())
                {
                    errorMessageLabel->setText (lastErrorMessage, dontSendNotification);
                    buttonText = "Re-enable";
                }

                enableButton.reset (new TextButton (buttonText));
                addAndMakeVisible (enableButton.get());
                enableButton->onClick = [this]
                {
                    if (auto* pcc = findParentComponentOfClass<ProjectContentComponent>())
                        pcc->setBuildEnabled (true);
                };
            }
        }
    }

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

    void resized() override
    {
        auto bounds = getLocalBounds();

        settingsButton.setBounds (bounds.removeFromBottom (25)
                                        .removeFromRight  (25)
                                        .reduced (3));

        if (errorMessageLabel != nullptr)
        {
            bounds.removeFromTop ((bounds.getHeight() / 2) - 40);

            errorMessageLabel->setBounds (bounds.removeFromTop (80));

            if (downloadButton != nullptr)
                downloadButton->setBounds (bounds.removeFromTop (20).reduced (20, 0));

            if (enableButton != nullptr)
                enableButton->setBounds (bounds.removeFromTop (20).reduced (20, 0));
        }
        else
        {
            concertinaPanel.setBounds (bounds);

            for (auto h : headers)
                if (h->getName() == "Activities")
                    h->yPosition = getHeight() - CurrentActivitiesComp::getMaxPanelHeight() - 55;
        }
    }

    bool isEnabled = false;
    String errorMessage;
    Component::SafePointer<ProjucerAppClasses::ErrorListComp> errorListComp;

private:
    OwnedArray<ConcertinaHeader> headers;
    ConcertinaPanel concertinaPanel;
    IconButton settingsButton { "Settings", getIcons().settings };

    std::unique_ptr<TextButton> downloadButton, enableButton;
    std::unique_ptr<Label> errorMessageLabel;
    bool showDownloadButton;
    bool showEnableButton;

    Rectangle<int> textBounds;

    //==============================================================================
    String getErrorMessage()
    {
        showDownloadButton = false;
        showEnableButton = false;

        auto osType = SystemStats::getOperatingSystemType();

        auto isMac = (osType & SystemStats::MacOSX) != 0;
        auto isWin = (osType & SystemStats::Windows) != 0;
        auto isLinux = (osType & SystemStats::Linux) != 0;

        if (! isMac && ! isWin && ! isLinux)
            return "Live-build features are not supported on your system.\n\n"
                   "Please check supported platforms at www.juce.com!";

        if (isLinux)
            return "Live-build features for Linux are under development.\n\n"
                   "Please check for updates at www.juce.com!";

        if (isMac)
            if (osType < SystemStats::MacOSX_10_9)
                return "Live-build features are available only on MacOSX 10.9 or higher.";

        if (isWin)
            if (! SystemStats::isOperatingSystem64Bit() || osType < SystemStats::Windows8_0)
                return "Live-build features are available only on 64-Bit Windows 8 or higher.";

        auto& compileEngineDll = *CompileEngineDLL::getInstance();
        auto dllPresent = compileEngineDll.isLoaded();

        if (! dllPresent)
        {
            showDownloadButton = true;
            return "Download the live-build engine to get started";
        }

        showEnableButton = true;
        return "Enable compilation to use the live-build engine";
    }

    void downloadDLL()
    {
        if (DownloadCompileEngineThread::downloadAndInstall())
        {
            if (! CompileEngineDLL::getInstance()->tryLoadDll())
            {
                AlertWindow::showMessageBox(AlertWindow::WarningIcon,
                                            "Download and install",
                                            "Loading the live-build engine failed");
                return;
            }

            if (auto* pcc = findParentComponentOfClass<ProjectContentComponent>())
                pcc->rebuildProjectUI();
        }
    }

    void buildConcertina (CompileEngineChildProcess& child)
    {
        for (auto i = concertinaPanel.getNumPanels() - 1; i >= 0 ; --i)
            concertinaPanel.removePanel (concertinaPanel.getPanel (i));

        headers.clear();

        errorListComp = new ProjucerAppClasses::ErrorListComp (child.errorList);
        auto* activities = new CurrentActivitiesComp (child.activityList);
        auto* comps = new ComponentListComp (child);

        concertinaPanel.addPanel (-1, errorListComp, true);
        concertinaPanel.addPanel (-1, comps, true);
        concertinaPanel.addPanel (-1, activities, true);

        headers.add (new ConcertinaHeader ("Errors",     getIcons().bug));
        headers.add (new ConcertinaHeader ("Components", getIcons().modules));
        headers.add (new ConcertinaHeader ("Activities", getIcons().buildTab));

        for (int i = 0; i < concertinaPanel.getNumPanels(); ++i)
        {
            auto* p = concertinaPanel.getPanel (i);
            auto* h = headers.getUnchecked (i);

            h->addChangeListener (this);
            h->yPosition = i * 30;

            concertinaPanel.setCustomPanelHeader (p, h, false);
            concertinaPanel.setPanelHeaderSize (p, 30);
        }

        concertinaPanel.setMaximumPanelSize (activities, CurrentActivitiesComp::getMaxPanelHeight());
        concertinaPanel.setPanelSize (errorListComp, 200, false);
        concertinaPanel.setPanelSize (comps, 300, false);
    }

    void changeListenerCallback (ChangeBroadcaster* source) override
    {
        if (auto* header = dynamic_cast<ConcertinaHeader*> (source))
        {
            auto index = headers.indexOf (header);
            concertinaPanel.expandPanelFully (concertinaPanel.getPanel (index), true);
        }
    }

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (LiveBuildTab)
};