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

   This file is part of the JUCE library.
   Copyright (c) 2015 - ROLI Ltd.

   Permission is granted to use this software under the terms of either:
   a) the GPL v2 (or any later version)
   b) the Affero GPL v3

   Details of these licenses can be found at: www.gnu.org/licenses

   JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

   ------------------------------------------------------------------------------

   To release a closed-source product which uses JUCE, commercial licenses are
   available: visit www.juce.com for more information.

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

struct IconButton    : public Button
{
    IconButton (String name, const Path* p)
        : Button (name),
          icon (p, Colours::transparentBlack)
    {
        lookAndFeelChanged();
        setTooltip (name);
    }

    void paintButton (Graphics& g, bool isMouseOverButton, bool isButtonDown) override
    {
        auto alpha = 1.0f;
        if (! isEnabled())
        {
            isMouseOverButton = false;
            isButtonDown = false;

            alpha = 0.2f;
        }

        auto backgroundColour = isIDEButton ? Colours::white
                                            : isUserButton ? findColour (userButtonBackgroundColourId)
                                                           : findColour (defaultButtonBackgroundColourId);

        backgroundColour = isButtonDown ? backgroundColour.darker (0.5f)
                                        : isMouseOverButton ? backgroundColour.darker (0.2f)
                                                            : backgroundColour;

        auto bounds = getLocalBounds().toFloat();

        if (isButtonDown)
            bounds.reduce (2, 2);

        Path ellipse;
        ellipse.addEllipse (bounds);
        g.reduceClipRegion(ellipse);

        g.setColour (backgroundColour.withAlpha (alpha));
        g.fillAll();

        if (iconImage != Image())
        {
            if (isIDEButton)
                bounds.reduce (7, 7);

            g.setOpacity (alpha);
            g.drawImage (iconImage, bounds, RectanglePlacement::fillDestination, false);
        }
        else
        {
            icon.withColour (findColour (defaultIconColourId).withAlpha (alpha)).draw (g, bounds.reduced (2, 2), false);
        }
    }

    Icon icon;
    Image iconImage;

    bool isIDEButton = false;
    bool isUserButton = false;
};

//==============================================================================
class UserSettingsPopup    : public Component
                           #if ! JUCER_ENABLE_GPL_MODE
                             , private Button::Listener,
                               private LicenseController::StateChangedCallback
                           #endif
{
public:
    UserSettingsPopup (bool isShownInsideWebview)
       #if ! JUCER_ENABLE_GPL_MODE
        : isInsideWebview (isShownInsideWebview)
       #endif
    {
       #if JUCER_ENABLE_GPL_MODE
        ignoreUnused (isShownInsideWebview);
       #endif

        auto standardFont = Font (12.0f);

        addAndMakeVisible (loggedInUsernameLabel = new Label ("Username Label"));

        loggedInUsernameLabel->setFont (standardFont);
        loggedInUsernameLabel->setJustificationType (Justification::centred);
        loggedInUsernameLabel->setMinimumHorizontalScale (0.75f);

       #if JUCER_ENABLE_GPL_MODE
        loggedInUsernameLabel->setText ("GPL Mode: Re-compile with JUCER_ENABLE_GPL_MODE=0 to enable login!",
                                        NotificationType::dontSendNotification);
       #else
        addAndMakeVisible (licenseTypeLabel = new Label ("License Type Label"));

        licenseTypeLabel->setFont (standardFont);
        licenseTypeLabel->setJustificationType (Justification::centred);
        licenseTypeLabel->setMinimumHorizontalScale (1.0f);

        addAndMakeVisible (logoutButton = new TextButton (isInsideWebview ? "Select different account..." : "Logout"));
        logoutButton->addListener (this);
        logoutButton->setColour (TextButton::buttonColourId, findColour (secondaryButtonBackgroundColourId));

        if (! isInsideWebview)
        {
            addAndMakeVisible (switchLicenseButton = new TextButton ("Switch License"));
            switchLicenseButton->addListener (this);
        }

        if (LicenseController* controller = ProjucerApplication::getApp().licenseController)
            licenseStateChanged (controller->getState());
       #endif
    }

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

    void resized() override
    {
        auto bounds = getLocalBounds().reduced (10, 20);

       #if JUCER_ENABLE_GPL_MODE
        loggedInUsernameLabel->setBounds (bounds);
       #else
        loggedInUsernameLabel->setBounds (bounds.removeFromTop (25));

        if (hasLicenseType)
        {
            bounds.removeFromTop (10);
            licenseTypeLabel->setBounds (bounds.removeFromTop (25));
        }

        bounds.removeFromBottom (5);
        auto buttonArea = bounds.removeFromBottom (30);

        if (! isInsideWebview)
            switchLicenseButton->setBounds (buttonArea.removeFromRight (buttonArea.getWidth() / 2).reduced (2));

        logoutButton->setBounds (buttonArea.reduced (2));
       #endif
    }

private:
    //==============================================================================
   #if ! JUCER_ENABLE_GPL_MODE
    void buttonClicked (Button* b) override
    {
        if (b == logoutButton)
        {
            dismissCalloutBox();
            ProjucerApplication::getApp().doLogout();
        }
        else if (b == switchLicenseButton)
        {
            dismissCalloutBox();
            if (LicenseController* controller = ProjucerApplication::getApp().licenseController)
                controller->chooseNewLicense();
        }
    }


    void licenseStateChanged (const LicenseState& state) override
    {
        hasLicenseType = (state.type != LicenseState::Type::noLicenseChosenYet);
        licenseTypeLabel->setVisible (hasLicenseType);
        loggedInUsernameLabel->setText (state.username, NotificationType::dontSendNotification);
        licenseTypeLabel->setText (LicenseState::licenseTypeToString (state.type), NotificationType::dontSendNotification);
    }

    void dismissCalloutBox()
    {
        if (auto* parent = findParentComponentOfClass<CallOutBox>())
            parent->dismiss();
    }

    void lookAndFeelChanged() override
    {
        if (logoutButton != nullptr)
            logoutButton->setColour (TextButton::buttonColourId, findColour (secondaryButtonBackgroundColourId));
    }
   #endif

    //==============================================================================
    ScopedPointer<Label> loggedInUsernameLabel;

   #if ! JUCER_ENABLE_GPL_MODE
    ScopedPointer<Label> licenseTypeLabel;
    ScopedPointer<TextButton> logoutButton, switchLicenseButton;
    bool hasLicenseType = false;
    bool isInsideWebview;
   #endif

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (UserSettingsPopup)
};

//==============================================================================
class HeaderComponent    : public Component,
                           private Button::Listener,
                           private ComboBox::Listener,
                           private ValueTree::Listener,
                           private ChangeListener
{
public:
    HeaderComponent()
        : configLabel ("Config Label", "Selected exporter")
    {
        addAndMakeVisible (configLabel);
        addAndMakeVisible (exporterBox);

        exporterBox.addListener (this);

        addAndMakeVisible  (juceIcon = new ImageComponent ("icon"));
        juceIcon->setImage (ImageCache::getFromMemory (BinaryData::juce_icon_png, BinaryData::juce_icon_pngSize),
                            RectanglePlacement::centred);

        projectNameLabel.setText (String(), dontSendNotification);
        addAndMakeVisible (projectNameLabel);

        initialiseButtons();
    }

    ~HeaderComponent()
    {
        if (userSettingsWindow != nullptr)
            userSettingsWindow->dismiss();
    }

    void resized() override
    {
        auto bounds = getLocalBounds();
        configLabel.setFont (Font (bounds.getHeight() / 3.0f));

        //======================================================================
        auto projectHeaderBounds = bounds.removeFromLeft (tabsWidth);
        juceIcon->setBounds (projectHeaderBounds.removeFromLeft (projectHeaderBounds.getHeight()).reduced (5, 5));

        projectSettingsButton->setBounds (projectHeaderBounds.removeFromRight (projectHeaderBounds.getHeight()).reduced (2, 2));

        projectNameLabel.setBounds (projectHeaderBounds);

        //======================================================================
        bounds.removeFromLeft (33);
        continuousRebuildButton->setBounds (bounds.removeFromLeft (bounds.getHeight()).reduced (2, 2));
        bounds.removeFromLeft (5);
        buildNowButton->setBounds (bounds.removeFromLeft (bounds.getHeight()).reduced (2, 2));

        bounds.removeFromRight (5);
        userSettingsButton->setBounds (bounds.removeFromRight (bounds.getHeight()).reduced (2, 2));

        auto exporterWidth = jmax (250, bounds.getWidth() / 2);
        auto spacing = bounds.getWidth() - exporterWidth;

        auto leftSpacing = jmax (20, spacing / 3);
        auto rightSpacing = jmax (40, 2 * (spacing / 3));

        bounds.removeFromLeft (leftSpacing);
        bounds.removeFromRight (rightSpacing);

        saveAndOpenInIDEButton->setBounds (bounds.removeFromRight (bounds.getHeight()).reduced (2, 2));
        bounds.removeFromRight (5);
        exporterSettingsButton->setBounds (bounds.removeFromRight (bounds.getHeight()).reduced (2, 2));
        bounds.removeFromRight (10);

        exporterBox.setBounds (bounds.removeFromBottom (roundToInt (bounds.getHeight() / 1.8f)));
        configLabel.setBounds (bounds);
    }

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

    void setCurrentProject (Project* p)
    {
        project = p;

        exportersTree = project->getExporters();
        exportersTree.addListener (this);
        updateExporters();

        project->addChangeListener (this);
        updateName();

        continuousRebuildButton->setEnabled (true);
        updateContinuousRebuildButtonIcon();

        if (auto* pcc = findParentComponentOfClass<ProjectContentComponent>())
            buildNowButton->setEnabled (! pcc->isContinuousRebuildEnabled() || ! pcc->isBuildEnabled());
    }

    void updateExporters()
    {
        auto selectedName = getSelectedExporterName();

        exporterBox.clear();

        int i = 0;
        for (Project::ExporterIterator exporter (*project); exporter.next(); ++i)
        {
            exporterBox.addItem (exporter->getName(), i + 1);

            if (selectedName == exporter->getName())
                exporterBox.setSelectedId (i + 1);
        }

        if (exporterBox.getSelectedItemIndex() == -1)
            exporterBox.setSelectedItemIndex (0);

        updateExporterButton();
    }

    String getSelectedExporterName()
    {
        return exporterBox.getItemText (exporterBox.getSelectedItemIndex());
    }

    bool canCurrentExporterLaunchProject()
    {
        for (Project::ExporterIterator exporter (*project); exporter.next();)
            if (exporter->getName() == getSelectedExporterName() && exporter->canLaunchProject())
                return true;

        return false;
    }

    int getUserButtonWidth()            { return userSettingsButton->getWidth(); }

    void sidebarTabsWidthChanged (int newWidth)
    {
        tabsWidth = newWidth;
        resized();
    }

    void showUserSettings()
    {
       #if JUCER_ENABLE_GPL_MODE
        const int settingsPopupHeight = 75;
       #else
        const int settingsPopupHeight = 150;
       #endif

        auto* content = new UserSettingsPopup (false);


        content->setSize (200, settingsPopupHeight);

        userSettingsWindow = &CallOutBox::launchAsynchronously (content, userSettingsButton->getScreenBounds(), nullptr);
    }

    void lookAndFeelChanged() override
    {
        if (userSettingsWindow != nullptr)
            userSettingsWindow->sendLookAndFeelChange();
    }

private:
    Project* project = nullptr;
    ValueTree exportersTree;

    Label configLabel, projectNameLabel;
    ComboBox exporterBox;

    ScopedPointer<ImageComponent> juceIcon;
    ScopedPointer<IconButton> projectSettingsButton, continuousRebuildButton, buildNowButton,
                              exporterSettingsButton, saveAndOpenInIDEButton, userSettingsButton;

    SafePointer<CallOutBox> userSettingsWindow;

    int tabsWidth = 200;

    //==========================================================================
    void buttonClicked (Button* b) override
    {
        auto* pcc = findParentComponentOfClass<ProjectContentComponent>();

        if (b == projectSettingsButton)
        {
            pcc->showProjectSettings();
        }
        else if (b == continuousRebuildButton)
        {
            if (! pcc->isBuildEnabled())
                pcc->setBuildEnabled (true);

            auto newState = ! pcc->isContinuousRebuildEnabled();
            pcc->setContinuousRebuildEnabled (newState);

            updateContinuousRebuildButtonIcon();
            buildNowButton->setEnabled (! pcc->isContinuousRebuildEnabled() || ! pcc->isBuildEnabled());
        }
        else if (b == buildNowButton)
        {
            if (! pcc->isBuildEnabled())
                pcc->setBuildEnabled (true);

            pcc->rebuildNow();
        }
        else if (b == exporterSettingsButton)
        {
            pcc->showExporterSettings (getSelectedExporterName());
        }
        else if (b == saveAndOpenInIDEButton)
        {
            pcc->openInSelectedIDE (true);
        }
        else if (b == userSettingsButton)
        {
            showUserSettings();
        }
    }

    void comboBoxChanged (ComboBox* c) override
    {
        if (c == &exporterBox)
            updateExporterButton();
    }

    void changeListenerCallback (ChangeBroadcaster* source) override
    {
        if (source == project)
            updateName();
    }

    void valueTreePropertyChanged (ValueTree&, const Identifier&) override       {}
    void valueTreeParentChanged (ValueTree&) override                            {}

    void valueTreeChildAdded (ValueTree& parentTree, ValueTree&) override        { updateIfNeeded (parentTree); }
    void valueTreeChildRemoved (ValueTree& parentTree, ValueTree&, int) override { updateIfNeeded (parentTree); }
    void valueTreeChildOrderChanged (ValueTree& parentTree, int, int) override   { updateIfNeeded (parentTree); }

    void initialiseButtons()
    {
        auto& icons = getIcons();

        addAndMakeVisible (projectSettingsButton = new IconButton ("Project Settings", &icons.settings));
        projectSettingsButton->addListener (this);

        addAndMakeVisible (continuousRebuildButton = new IconButton ("Continuous Rebuild", &icons.continuousBuildStart));
        continuousRebuildButton->addListener (this);
        continuousRebuildButton->setEnabled (false);

        addAndMakeVisible (buildNowButton = new IconButton ("Build Now", &icons.buildNow));
        buildNowButton->addListener (this);
        buildNowButton->setEnabled (false);

        addAndMakeVisible (exporterSettingsButton = new IconButton ("Exporter Settings", &icons.edit));
        exporterSettingsButton->addListener (this);

        addAndMakeVisible (saveAndOpenInIDEButton = new IconButton ("Save and Open in IDE", nullptr));
        saveAndOpenInIDEButton->addListener (this);
        saveAndOpenInIDEButton->isIDEButton = true;

        addAndMakeVisible (userSettingsButton = new IconButton ("User Settings", &icons.user));
        userSettingsButton->addListener (this);
        userSettingsButton->isUserButton = true;

        updateExporterButton();
        updateUserAvatar();
    }

    void updateIfNeeded (ValueTree tree)
    {
        if (tree == exportersTree)
            updateExporters();
    }

    void updateName()
    {
        projectNameLabel.setText (project->getDocumentTitle(), dontSendNotification);
    }

    void updateExporterButton()
    {
        auto currentExporterName = getSelectedExporterName();

        for (auto info : ProjectExporter::getExporterTypes())
        {
            if (info.name == currentExporterName)
            {
                saveAndOpenInIDEButton->iconImage = info.getIcon();
                saveAndOpenInIDEButton->repaint();
                saveAndOpenInIDEButton->setEnabled (canCurrentExporterLaunchProject());
            }
        }
    }

    void updateUserAvatar()
    {
        if (LicenseController* controller = ProjucerApplication::getApp().licenseController)
        {
            auto& state = controller->getState();

            userSettingsButton->iconImage = state.avatar;
            userSettingsButton->repaint();
        }
    }

    void updateContinuousRebuildButtonIcon()
    {
        if (auto* pcc = findParentComponentOfClass<ProjectContentComponent>())
        {
            continuousRebuildButton->setEnabled (pcc->isBuildEnabled());
            continuousRebuildButton->icon = Icon (pcc->isContinuousRebuildEnabled() ? &getIcons().continuousBuildStop
                                                                                    : &getIcons().continuousBuildStart, Colours::transparentBlack);
        }
    }

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (HeaderComponent)
};