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

  This file is part of the dRowAudio JUCE module
  Copyright 2004-13 by dRowAudio.

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

  dRowAudio is provided under the terms of The MIT License (MIT):

  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.

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



//==============================================================================
BasicFileBrowser::BasicFileBrowser (int flags_,
                                    const File& initialFileOrDirectory,
                                    const FileFilter* fileFilter_)
    : FileFilter (""),
      fileFilter (fileFilter_),
      flags (flags_),
      thread ("Juce BasicFileBrowser"),
      showResizer(true)
{
    // You need to specify one or other of the open/save flags..
    jassert ((flags & (saveMode | openMode)) != 0);
    jassert ((flags & (saveMode | openMode)) != (saveMode | openMode));

    // You need to specify at least one of these flags..
    jassert ((flags & (canSelectFiles | canSelectDirectories)) != 0);

    juce::String filename;

    if (initialFileOrDirectory == File())
    {
        currentRoot = juce::File::getCurrentWorkingDirectory();
    }
    else if (initialFileOrDirectory.isDirectory())
    {
        currentRoot = initialFileOrDirectory;
    }
    else
    {
        chosenFiles.add (initialFileOrDirectory);
        currentRoot = initialFileOrDirectory.getParentDirectory();
        filename = initialFileOrDirectory.getFileName();
    }

    fileList = std::make_unique<DirectoryContentsList> ((FileFilter*)this, thread);

    FileListComponent* const list = new FileListComponent (*fileList);
    fileListComponent.reset (list);
    list->setOutlineThickness (0);
    list->getViewport()->setScrollBarThickness (10);
    list->setRowHeight (18);

    if ((flags & canSelectMultipleItems) != 0)
        list->setMultipleSelectionEnabled (true);

    addAndMakeVisible (list);

    fileListComponent->addListener (this);
    list->getViewport()->getVerticalScrollBar().setAutoHide (false);

    resizer = std::make_unique<ResizableCornerComponent> (this, &resizeLimits);
    addAndMakeVisible (*resizer);
    resizer->setMouseCursor (MouseCursor::LeftRightResizeCursor);

    setRoot (currentRoot);

    thread.startThread();
}

BasicFileBrowser::~BasicFileBrowser()
{
    fileListComponent = nullptr;
    fileList = nullptr;

    thread.stopThread (10000);
}

//==============================================================================
void BasicFileBrowser::addListener (FileBrowserListener* const newListener)
{
    listeners.add (newListener);
}

void BasicFileBrowser::removeListener (FileBrowserListener* const listener)
{
    listeners.remove (listener);
}

void BasicFileBrowser::mouseDoubleClick (const MouseEvent &e)
{
    if (resizer->contains (juce::Point<int> (e.x, e.y)))
    {
        setSize (jmax (getLongestWidth(), resizeLimits.getMinimumWidth()), 800);
    }
}

//==============================================================================
bool BasicFileBrowser::isSaveMode() const noexcept
{
    return (flags & saveMode) != 0;
}

int BasicFileBrowser::getNumSelectedFiles() const noexcept
{
    if (chosenFiles.size() == 0 && currentFileIsValid())
        return 1;

    return chosenFiles.size();
}

File BasicFileBrowser::getSelectedFile (int index) const noexcept
{
    return chosenFiles[index];
}

bool BasicFileBrowser::currentFileIsValid() const
{
    if (isSaveMode())
        return ! getSelectedFile (0).isDirectory();
    else
        return getSelectedFile (0).exists();
}

File BasicFileBrowser::getHighlightedFile() const noexcept
{
    return fileListComponent->getSelectedFile (0);
}

void BasicFileBrowser::deselectAllFiles()
{
    fileListComponent->deselectAllFiles();
}

//==============================================================================
bool BasicFileBrowser::isFileSuitable (const File& file) const
{
    return (flags & canSelectFiles) != 0 && (fileFilter == nullptr || fileFilter->isFileSuitable (file));
}

bool BasicFileBrowser::isDirectorySuitable (const File&) const
{
    return true;
}

bool BasicFileBrowser::isFileOrDirSuitable (const File& f) const
{
    if (f.isDirectory())
        return (flags & canSelectDirectories) != 0
        && (fileFilter == nullptr || fileFilter->isDirectorySuitable (f));

    return (flags & canSelectFiles) != 0 && f.exists()
    && (fileFilter == nullptr || fileFilter->isFileSuitable (f));
}

//==============================================================================
const File& BasicFileBrowser::getRoot() const
{
    return currentRoot;
}

void BasicFileBrowser::setRoot (const File& newRootDirectory)
{
    bool callListeners = false;

    if (currentRoot != newRootDirectory)
    {
        callListeners = true;
        fileListComponent->scrollToTop();
    }

    currentRoot = newRootDirectory;
    fileList->setDirectory (currentRoot, true, true);

    if (callListeners)
    {
        Component::BailOutChecker checker (this);
        listeners.callChecked (checker, &FileBrowserListener::browserRootChanged, currentRoot);
    }
}

void BasicFileBrowser::refresh()
{
    fileList->refresh();
}

void BasicFileBrowser::setFileFilter (const FileFilter* const newFileFilter)
{
    if (fileFilter != newFileFilter)
    {
        fileFilter = newFileFilter;
        refresh();
    }
}

String BasicFileBrowser::getActionVerb() const
{
    return isSaveMode() ? TRANS("Save") : TRANS("Open");
}

int BasicFileBrowser::getLongestWidth()
{
    const int noFiles = fileList->getNumFiles();
    int stringWidth = 0;

    FileListComponent* list = dynamic_cast<FileListComponent*> (fileListComponent.get());
    if (list != nullptr)
    {
        Font temp (list->getRowHeight() * 0.7f);
        for (int i = 0; i < noFiles; ++i)
        {
            int itemWidth = temp.getStringWidth (fileList->getFile(i).getFileName());
            if (itemWidth >    stringWidth)
                stringWidth = itemWidth;
        }
        stringWidth += (2 * list->getRowHeight()) + 30;
    }

    return stringWidth;
}

DirectoryContentsDisplayComponent* BasicFileBrowser::getDisplayComponent() const noexcept
{
    return fileListComponent.get();
}

//==============================================================================
void BasicFileBrowser::resized()
{
    const int height = getHeight();
    const int width = getWidth();

    FileListComponent* list = dynamic_cast<FileListComponent*> (fileListComponent.get());

    if (list != nullptr)
    {
        list->setBounds (0, 0, width, height);
        ScrollBar& bar = list->getVerticalScrollBar();
        const int size = roundToInt (bar.getWidth() * 1.5f);

        if (showResizer)
        {
            bar.setTransform (AffineTransform::scale (1, (height - (float) size) / height));

            resizeLimits.setSizeLimits (150, height, 1600, height);
            resizer->setBounds (roundToInt (width - size * (2.0f / 3.0f)), height - size,
                                roundToInt (size * (2.0f / 3.0f)), size);
        }
        else
        {
            bar.setTransform ({});
        }
    }
}

//==============================================================================
void BasicFileBrowser::sendListenerChangeMessage()
{
    Component::BailOutChecker checker (this);

    // You shouldn't delete the browser when the file gets changed!
    jassert (! checker.shouldBailOut());

    listeners.callChecked (checker, &FileBrowserListener::selectionChanged);
}

void BasicFileBrowser::selectionChanged()
{
    juce::StringArray newFilenames;
    bool resetChosenFiles = true;

    for (int i = 0; i < fileListComponent->getNumSelectedFiles(); ++i)
    {
        const File f (fileListComponent->getSelectedFile (i));

        if (isFileOrDirSuitable (f))
        {
            if (resetChosenFiles)
            {
                chosenFiles.clear();
                resetChosenFiles = false;
            }

            chosenFiles.add (f);
            newFilenames.add (f.getRelativePathFrom (getRoot()));
        }
    }

    sendListenerChangeMessage();
}

void BasicFileBrowser::fileClicked (const File& f, const MouseEvent& e)
{
    Component::BailOutChecker checker (this);
    listeners.callChecked (checker, &FileBrowserListener::fileClicked, f, e);
}

void BasicFileBrowser::fileDoubleClicked (const File& f)
{
    if (f.isDirectory())
    {
        setRoot (f);
    }
    else
    {
        Component::BailOutChecker checker (this);
        listeners.callChecked (checker, &FileBrowserListener::fileDoubleClicked, f);
    }
}

void BasicFileBrowser::browserRootChanged (const File&) {}

bool BasicFileBrowser::keyPressed (const KeyPress& key)
{
#if JUCE_LINUX || JUCE_WINDOWS
    if (key.getModifiers().isCommandDown()
        && (key.getKeyCode() == 'H' || key.getKeyCode() == 'h'))
    {
        fileList->setIgnoresHiddenFiles (! fileList->ignoresHiddenFiles());
        fileList->refresh();
        return true;
    }
#endif

    key.getModifiers().isCommandDown();

    return false;
}
