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

   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.

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

namespace juce
{

FileSearchPathListComponent::FileSearchPathListComponent()
    : addButton ("+"),
      removeButton ("-"),
      changeButton (TRANS ("change...")),
      upButton ({}, DrawableButton::ImageOnButtonBackground),
      downButton ({}, DrawableButton::ImageOnButtonBackground)
{
    listBox.setModel (this);
    addAndMakeVisible (listBox);
    listBox.setColour (ListBox::backgroundColourId, Colours::black.withAlpha (0.02f));
    listBox.setColour (ListBox::outlineColourId, Colours::black.withAlpha (0.1f));
    listBox.setOutlineThickness (1);

    addAndMakeVisible (addButton);
    addButton.onClick = [this] { addPath(); };
    addButton.setConnectedEdges (Button::ConnectedOnLeft | Button::ConnectedOnRight | Button::ConnectedOnBottom | Button::ConnectedOnTop);

    addAndMakeVisible (removeButton);
    removeButton.onClick = [this] { deleteSelected(); };
    removeButton.setConnectedEdges (Button::ConnectedOnLeft | Button::ConnectedOnRight | Button::ConnectedOnBottom | Button::ConnectedOnTop);

    addAndMakeVisible (changeButton);
    changeButton.onClick = [this] { editSelected(); };

    addAndMakeVisible (upButton);
    upButton.onClick = [this] { moveSelection (-1); };

    auto arrowColour = findColour (ListBox::textColourId);

    {
        Path arrowPath;
        arrowPath.addArrow ({ 50.0f, 100.0f, 50.0f, 0.0f }, 40.0f, 100.0f, 50.0f);
        DrawablePath arrowImage;
        arrowImage.setFill (arrowColour);
        arrowImage.setPath (arrowPath);

        upButton.setImages (&arrowImage);
    }

    addAndMakeVisible (downButton);
    downButton.onClick = [this] { moveSelection (1); };

    {
        Path arrowPath;
        arrowPath.addArrow ({ 50.0f, 0.0f, 50.0f, 100.0f }, 40.0f, 100.0f, 50.0f);
        DrawablePath arrowImage;
        arrowImage.setFill (arrowColour);
        arrowImage.setPath (arrowPath);

        downButton.setImages (&arrowImage);
    }

    updateButtons();
}

FileSearchPathListComponent::~FileSearchPathListComponent()
{
}

void FileSearchPathListComponent::updateButtons()
{
    const bool anythingSelected = listBox.getNumSelectedRows() > 0;

    removeButton.setEnabled (anythingSelected);
    changeButton.setEnabled (anythingSelected);
    upButton.setEnabled (anythingSelected);
    downButton.setEnabled (anythingSelected);
}

void FileSearchPathListComponent::changed()
{
    listBox.updateContent();
    listBox.repaint();
    updateButtons();
}

//==============================================================================
void FileSearchPathListComponent::setPath (const FileSearchPath& newPath)
{
    if (newPath.toString() != path.toString())
    {
        path = newPath;
        changed();
    }
}

void FileSearchPathListComponent::setDefaultBrowseTarget (const File& newDefaultDirectory)
{
    defaultBrowseTarget = newDefaultDirectory;
}

//==============================================================================
int FileSearchPathListComponent::getNumRows()
{
    return path.getNumPaths();
}

void FileSearchPathListComponent::paintListBoxItem (int rowNumber, Graphics& g, int width, int height, bool rowIsSelected)
{
    if (rowIsSelected)
        g.fillAll (findColour (TextEditor::highlightColourId));

    g.setColour (findColour (ListBox::textColourId));
    Font f (height * 0.7f);
    f.setHorizontalScale (0.9f);
    g.setFont (f);

    g.drawText (path[rowNumber].getFullPathName(),
                4, 0, width - 6, height,
                Justification::centredLeft, true);
}

void FileSearchPathListComponent::deleteKeyPressed (int row)
{
    if (isPositiveAndBelow (row, path.getNumPaths()))
    {
        path.remove (row);
        changed();
    }
}

void FileSearchPathListComponent::returnKeyPressed (int row)
{
   #if JUCE_MODAL_LOOPS_PERMITTED
    FileChooser chooser (TRANS("Change folder..."), path[row], "*");

    if (chooser.browseForDirectory())
    {
        path.remove (row);
        path.add (chooser.getResult(), row);
        changed();
    }
   #else
    ignoreUnused (row);
   #endif
}

void FileSearchPathListComponent::listBoxItemDoubleClicked (int row, const MouseEvent&)
{
    returnKeyPressed (row);
}

void FileSearchPathListComponent::selectedRowsChanged (int)
{
    updateButtons();
}

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

void FileSearchPathListComponent::resized()
{
    const int buttonH = 22;
    const int buttonY = getHeight() - buttonH - 4;
    listBox.setBounds (2, 2, getWidth() - 4, buttonY - 5);

    addButton.setBounds (2, buttonY, buttonH, buttonH);
    removeButton.setBounds (addButton.getRight(), buttonY, buttonH, buttonH);

    changeButton.changeWidthToFitText (buttonH);
    downButton.setSize (buttonH * 2, buttonH);
    upButton.setSize (buttonH * 2, buttonH);

    downButton.setTopRightPosition (getWidth() - 2, buttonY);
    upButton.setTopRightPosition (downButton.getX() - 4, buttonY);
    changeButton.setTopRightPosition (upButton.getX() - 8, buttonY);
}

bool FileSearchPathListComponent::isInterestedInFileDrag (const StringArray&)
{
    return true;
}

void FileSearchPathListComponent::filesDropped (const StringArray& filenames, int, int mouseY)
{
    for (int i = filenames.size(); --i >= 0;)
    {
        const File f (filenames[i]);

        if (f.isDirectory())
        {
            auto row = listBox.getRowContainingPosition (0, mouseY - listBox.getY());
            path.add (f, row);
            changed();
        }
    }
}

void FileSearchPathListComponent::addPath()
{
    auto start = defaultBrowseTarget;

    if (start == File())
        start = path[0];

    if (start == File())
        start = File::getCurrentWorkingDirectory();

   #if JUCE_MODAL_LOOPS_PERMITTED
    FileChooser chooser (TRANS("Add a folder..."), start, "*");

    if (chooser.browseForDirectory())
        path.add (chooser.getResult(), listBox.getSelectedRow());

    changed();
   #else
    jassertfalse; // needs rewriting to deal with non-modal environments
   #endif
}

void FileSearchPathListComponent::deleteSelected()
{
    deleteKeyPressed (listBox.getSelectedRow());
    changed();
}

void FileSearchPathListComponent::editSelected()
{
    returnKeyPressed (listBox.getSelectedRow());
    changed();
}

void FileSearchPathListComponent::moveSelection (int delta)
{
    jassert (delta == -1 || delta == 1);
    auto currentRow = listBox.getSelectedRow();

    if (isPositiveAndBelow (currentRow, path.getNumPaths()))
    {
        auto newRow = jlimit (0, path.getNumPaths() - 1, currentRow + delta);

        if (currentRow != newRow)
        {
            auto f = path[currentRow];
            path.remove (currentRow);
            path.add (f, newRow);
            listBox.selectRow (newRow);
            changed();
        }
    }
}


} // namespace juce