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

   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.

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

class ModulesPanel  : public Component,
                      private ListBoxModel,
                      private ValueTree::Listener,
                      private Button::Listener
{
public:
    ModulesPanel (Project& p)
        : project (p),
          modulesValueTree (p.getModules().state),
          header ("Modules", Icon (getIcons().modules, Colours::transparentBlack)),
          setCopyModeButton  ("Set copy-mode for all modules..."),
          copyPathButton ("Set paths for all modules...")
    {
        listHeader = new ListBoxHeader ( { "Module", "Version", "Make Local Copy", "Paths" },
                                        { 0.25f, 0.2f, 0.2f, 0.35f } );
        list.setHeaderComponent (listHeader);
        list.setModel (this);
        list.setColour (ListBox::backgroundColourId, Colours::transparentBlack);
        addAndMakeVisible (list);
        list.updateContent();
        list.setRowHeight (30);
        list.setMultipleSelectionEnabled (true);

        addAndMakeVisible (header);

        addAndMakeVisible (setCopyModeButton);
        addAndMakeVisible (copyPathButton);
        setCopyModeButton.addListener (this);
        setCopyModeButton.setTriggeredOnMouseDown (true);
        copyPathButton.addListener (this);
        copyPathButton.setTriggeredOnMouseDown (true);

        modulesValueTree.addListener (this);
        lookAndFeelChanged();
    }

    void paint (Graphics& g) override
    {
        g.setColour (findColour (secondaryBackgroundColourId));
        g.fillRect (getLocalBounds().reduced (12, 0));
    }

    void resized() override
    {
        auto bounds = getLocalBounds().reduced (12, 0);

        header.setBounds (bounds.removeFromTop (40));

        bounds.reduce (10, 0);
        list.setBounds (bounds.removeFromTop (list.getRowPosition (getNumRows() - 1, true).getBottom() + 20));

        auto buttonRow = bounds.removeFromTop (35);
        setCopyModeButton.setBounds (buttonRow.removeFromLeft (jmin (200, bounds.getWidth() / 3)));
        buttonRow.removeFromLeft (8);
        copyPathButton.setBounds (buttonRow.removeFromLeft (jmin (200, bounds.getWidth() / 3)));
    }

    void parentSizeChanged() override
    {
        setSize (jmax (550, getParentWidth()), getParentHeight());
    }

    int getNumRows() override
    {
        return project.getModules().getNumModules();
    }

    void paintListBoxItem (int rowNumber, Graphics& g, int width, int height, bool rowIsSelected) override
    {
        ignoreUnused (height);

        auto bounds = Rectangle<int> (0, 0, width, height);

        g.setColour (rowIsSelected ? findColour (defaultHighlightColourId) : findColour (rowNumber % 2 == 0 ? widgetBackgroundColourId
                                                                                                            : secondaryWidgetBackgroundColourId));
        g.fillRect (bounds.withTrimmedBottom (1));

        bounds.removeFromLeft (5);
        g.setColour (rowIsSelected ? findColour (defaultHighlightedTextColourId) : findColour (widgetTextColourId));

        //======================================================================
        const auto moduleID = project.getModules().getModuleID (rowNumber);

        g.drawFittedText (moduleID, bounds.removeFromLeft (roundToInt (listHeader->getProportionAtIndex (0) * width)), Justification::centredLeft, 1);

        //======================================================================
        auto version = project.getModules().getModuleInfo (moduleID).getVersion();
        if (version.isEmpty())
            version = "?";

        g.drawFittedText (version, bounds.removeFromLeft (roundToInt (listHeader->getProportionAtIndex (1) * width)), Justification::centredLeft, 1);

        //======================================================================
        const auto copyLocally = project.getModules().shouldCopyModuleFilesLocally (moduleID).getValue()
                                      ? "Yes" : "No";

        g.drawFittedText (copyLocally, bounds.removeFromLeft (roundToInt (listHeader->getProportionAtIndex (2) * width)), Justification::centredLeft, 1);

        //======================================================================
        StringArray paths;

        for (Project::ExporterIterator exporter (project); exporter.next();)
            paths.addIfNotAlreadyThere (exporter->getPathForModuleString (moduleID).trim());

        const auto pathText = paths.joinIntoString (", ");

        g.drawFittedText (pathText, bounds.removeFromLeft (roundToInt (listHeader->getProportionAtIndex (3) * width)), Justification::centredLeft, 1);
    }

    void listBoxItemDoubleClicked (int row, const MouseEvent&) override
    {
        const String moduleID (project.getModules().getModuleID (row));

        if (moduleID.isNotEmpty())
            if (ProjectContentComponent* pcc = findParentComponentOfClass<ProjectContentComponent>())
                pcc->showModule (moduleID);
    }

    void deleteKeyPressed (int row) override
    {
        project.getModules().removeModule (project.getModules().getModuleID (row));
    }

    void buttonClicked (Button* b) override
    {
        if (b == &setCopyModeButton)   showCopyModeMenu();
        if (b == &copyPathButton)      showSetPathsMenu();
    }

    void lookAndFeelChanged() override
    {
        setCopyModeButton.setColour (TextButton::buttonColourId, findColour (secondaryButtonBackgroundColourId));
        copyPathButton.setColour    (TextButton::buttonColourId, findColour (defaultButtonBackgroundColourId));
    }

private:
    enum
    {
        nameCol = 1,
        versionCol,
        copyCol,
        pathCol
    };

    Project& project;
    ValueTree modulesValueTree;
    ContentViewHeader header;
    ListBox list;
    ListBoxHeader* listHeader;
    TextButton setCopyModeButton, copyPathButton;
    std::map<String, var> modulePathClipboard;

    void valueTreePropertyChanged (ValueTree&, const Identifier&) override    { itemChanged(); }
    void valueTreeChildAdded (ValueTree&, ValueTree&) override                { itemChanged(); }
    void valueTreeChildRemoved (ValueTree&, ValueTree&, int) override         { itemChanged(); }
    void valueTreeChildOrderChanged (ValueTree&, int, int) override           { itemChanged(); }
    void valueTreeParentChanged (ValueTree&) override                         { itemChanged(); }

    void itemChanged()
    {
        list.updateContent();
        resized();
        repaint();
    }

    void showCopyModeMenu()
    {
        PopupMenu m;
        m.addItem (1, "Set all modules to copy locally");
        m.addItem (2, "Set all modules to not copy locally");

        int res = m.showAt (&setCopyModeButton);

        if (res != 0)
            project.getModules().setLocalCopyModeForAllModules (res == 1);
    }

    void showSetPathsMenu()
    {
        enum
        {
            copyPathsToAllModulesID = 1,
            copyPathsID,
            pastePathsID
        };

        auto& moduleList = project.getModules();
        auto moduleToCopy = moduleList.getModuleID (list.getSelectedRow());

        if (moduleToCopy.isNotEmpty())
        {
            PopupMenu m;
            m.addItem (copyPathsToAllModulesID, "Copy the paths from the module '" + moduleToCopy + "' to all other modules");
            m.addItem (copyPathsID, "Copy paths from selected module", list.getNumSelectedRows() == 1);
            m.addItem (pastePathsID, "Paste paths to selected modules", ! modulePathClipboard.empty());

            int res = m.showAt (&copyPathButton);

            if (res == copyPathsToAllModulesID)
            {
                for (Project::ExporterIterator exporter (project); exporter.next();)
                {
                    for (int i = 0; i < moduleList.getNumModules(); ++i)
                    {
                        auto modID = moduleList.getModuleID (i);

                        if (modID != moduleToCopy)
                            exporter->getPathForModuleValue (modID) = exporter->getPathForModuleValue (moduleToCopy).getValue();
                    }
                }
            }
            else if (res == copyPathsID)
            {
                 modulePathClipboard.clear();

                 for (Project::ExporterIterator exporter (project); exporter.next();)
                     modulePathClipboard[exporter->getName()] = exporter->getPathForModuleValue (moduleToCopy).getValue();
            }
            else if (res == pastePathsID)
            {
                for (int selectionId = 0; selectionId < list.getNumSelectedRows(); ++selectionId)
                {
                    auto rowNumber = list.getSelectedRow (selectionId);
                    auto modID = moduleList.getModuleID (rowNumber);

                    for (Project::ExporterIterator exporter (project); exporter.next();)
                        exporter->getPathForModuleValue (modID) = modulePathClipboard[exporter->getName()];
                }
            }

            list.repaint();
        }
        else
        {
            PopupMenu m;
            m.addItem (1, "(Select a module in the list above to use this option)", false);

            m.showAt (&copyPathButton);
        }
    }

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ModulesPanel)
};