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

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   JUCE is an open source library subject to commercial or open-source
   licensing.

   By using JUCE, you agree to the terms of both the JUCE 5 End-User License
   Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
   27th April 2017).

   End User License Agreement: www.juce.com/juce-5-licence
   Privacy Policy: www.juce.com/juce-5-privacy-policy

   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).

   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
{

struct Spinner  : public Component,
                  private Timer
{
    Spinner()                       { startTimer (1000 / 50); }
    void timerCallback() override   { repaint(); }

    void paint (Graphics& g) override
    {
        getLookAndFeel().drawSpinningWaitAnimation (g, Colours::darkgrey, 0, 0, getWidth(), getHeight());
    }
};

struct OnlineUnlockForm::OverlayComp  : public Component,
                                        private Thread,
                                        private Timer,
                                        private Button::Listener
{
    OverlayComp (OnlineUnlockForm& f, bool hasCancelButton = false)
        : Thread (String()), form (f)
    {
        result.succeeded = false;
        email = form.emailBox.getText();
        password = form.passwordBox.getText();
        addAndMakeVisible (spinner);

        if (hasCancelButton)
        {
            cancelButton.reset (new TextButton (TRANS ("Cancel")));
            addAndMakeVisible (cancelButton.get());
            cancelButton->addListener (this);
        }

        startThread (4);
    }

    ~OverlayComp() override
    {
        stopThread (10000);
    }

    void paint (Graphics& g) override
    {
        g.fillAll (Colours::white.withAlpha (0.97f));

        g.setColour (Colours::black);
        g.setFont (15.0f);

        g.drawFittedText (TRANS("Contacting XYZ...").replace ("XYZ", form.status.getWebsiteName()),
                          getLocalBounds().reduced (20, 0).removeFromTop (proportionOfHeight (0.6f)),
                          Justification::centred, 5);
    }

    void resized() override
    {
        const int spinnerSize = 40;
        spinner.setBounds ((getWidth() - spinnerSize) / 2, proportionOfHeight (0.6f), spinnerSize, spinnerSize);

        if (cancelButton != nullptr)
            cancelButton->setBounds (getLocalBounds().removeFromBottom (50).reduced (getWidth() / 4, 5));
    }

    void run() override
    {
        result = form.status.attemptWebserverUnlock (email, password);
        startTimer (100);
    }

    void timerCallback() override
    {
        spinner.setVisible (false);
        stopTimer();

        if (result.errorMessage.isNotEmpty())
        {
            AlertWindow::showMessageBoxAsync (AlertWindow::WarningIcon,
                                              TRANS("Registration Failed"),
                                              result.errorMessage);
        }
        else if (result.informativeMessage.isNotEmpty())
        {
            AlertWindow::showMessageBoxAsync (AlertWindow::InfoIcon,
                                              TRANS("Registration Complete!"),
                                              result.informativeMessage);
        }
        else if (result.urlToLaunch.isNotEmpty())
        {
            URL url (result.urlToLaunch);
            url.launchInDefaultBrowser();
        }

        // (local copies because we're about to delete this)
        const bool worked = result.succeeded;
        OnlineUnlockForm& f = form;

        delete this;

        if (worked)
            f.dismiss();
    }

    void buttonClicked (Button* button) override
    {
        if (button == cancelButton.get())
        {
            form.status.userCancelled();

            spinner.setVisible (false);
            stopTimer();

            delete this;
        }
    }

    OnlineUnlockForm& form;
    Spinner spinner;
    OnlineUnlockStatus::UnlockResult result;
    String email, password;

    std::unique_ptr<TextButton> cancelButton;

    JUCE_LEAK_DETECTOR (OnlineUnlockForm::OverlayComp)
};

static juce_wchar getDefaultPasswordChar() noexcept
{
   #if JUCE_LINUX
    return 0x2022;
   #else
    return 0x25cf;
   #endif
}

OnlineUnlockForm::OnlineUnlockForm (OnlineUnlockStatus& s,
                                    const String& userInstructions,
                                    bool hasCancelButton,
                                    bool overlayHasCancelButton)
    : message (String(), userInstructions),
      passwordBox (String(), getDefaultPasswordChar()),
      registerButton (TRANS("Register")),
      cancelButton (TRANS ("Cancel")),
      status (s),
      showOverlayCancelButton (overlayHasCancelButton)
{
    // Please supply a message to tell your users what to do!
    jassert (userInstructions.isNotEmpty());

    setOpaque (true);

    emailBox.setText (status.getUserEmail());
    message.setJustificationType (Justification::centred);

    addAndMakeVisible (message);
    addAndMakeVisible (emailBox);
    addAndMakeVisible (passwordBox);
    addAndMakeVisible (registerButton);

    if (hasCancelButton)
        addAndMakeVisible (cancelButton);

    emailBox.setEscapeAndReturnKeysConsumed (false);
    passwordBox.setEscapeAndReturnKeysConsumed (false);

    registerButton.addShortcut (KeyPress (KeyPress::returnKey));

    registerButton.addListener (this);
    cancelButton.addListener (this);

    lookAndFeelChanged();
    setSize (500, 250);
}

OnlineUnlockForm::~OnlineUnlockForm()
{
    unlockingOverlay.deleteAndZero();
}

void OnlineUnlockForm::paint (Graphics& g)
{
    g.fillAll (Colours::lightgrey);
}

void OnlineUnlockForm::resized()
{
    /* If you're writing a plugin, then DO NOT USE A POP-UP A DIALOG WINDOW!
       Plugins that create external windows are incredibly annoying for users, and
       cause all sorts of headaches for hosts. Don't be the person who writes that
       plugin that irritates everyone with a nagging dialog box every time they scan!
    */
    jassert (JUCEApplicationBase::isStandaloneApp() || findParentComponentOfClass<DialogWindow>() == nullptr);

    const int buttonHeight = 22;

    auto r = getLocalBounds().reduced (10, 20);

    auto buttonArea = r.removeFromBottom (buttonHeight);
    registerButton.changeWidthToFitText (buttonHeight);
    cancelButton.changeWidthToFitText (buttonHeight);

    const int gap = 20;
    buttonArea = buttonArea.withSizeKeepingCentre (registerButton.getWidth()
                                                     + (cancelButton.isVisible() ? gap + cancelButton.getWidth() : 0),
                                                   buttonHeight);
    registerButton.setBounds (buttonArea.removeFromLeft (registerButton.getWidth()));
    buttonArea.removeFromLeft (gap);
    cancelButton.setBounds (buttonArea);

    r.removeFromBottom (20);

    // (force use of a default system font to make sure it has the password blob character)
    Font font (Font::getDefaultTypefaceForFont (Font (Font::getDefaultSansSerifFontName(),
                                                      Font::getDefaultStyle(),
                                                      5.0f)));

    const int boxHeight = 24;
    passwordBox.setBounds (r.removeFromBottom (boxHeight));
    passwordBox.setInputRestrictions (64);
    passwordBox.setFont (font);

    r.removeFromBottom (20);
    emailBox.setBounds (r.removeFromBottom (boxHeight));
    emailBox.setInputRestrictions (512);
    emailBox.setFont (font);

    r.removeFromBottom (20);

    message.setBounds (r);

    if (unlockingOverlay != nullptr)
        unlockingOverlay->setBounds (getLocalBounds());
}

void OnlineUnlockForm::lookAndFeelChanged()
{
    Colour labelCol (findColour (TextEditor::backgroundColourId).contrasting (0.5f));

    emailBox.setTextToShowWhenEmpty (TRANS("Email Address"), labelCol);
    passwordBox.setTextToShowWhenEmpty (TRANS("Password"), labelCol);
}

void OnlineUnlockForm::showBubbleMessage (const String& text, Component& target)
{
    bubble.reset (new BubbleMessageComponent (500));
    addChildComponent (bubble.get());

    AttributedString attString;
    attString.append (text, Font (16.0f));

    bubble->showAt (getLocalArea (&target, target.getLocalBounds()),
                    attString, 500,  // numMillisecondsBeforeRemoving
                    true,  // removeWhenMouseClicked
                    false); // deleteSelfAfterUse
}

void OnlineUnlockForm::buttonClicked (Button* b)
{
    if (b == &registerButton)
        attemptRegistration();
    else if (b == &cancelButton)
        dismiss();
}

void OnlineUnlockForm::attemptRegistration()
{
    if (unlockingOverlay == nullptr)
    {
        if (emailBox.getText().trim().length() < 3)
        {
            showBubbleMessage (TRANS ("Please enter a valid email address!"), emailBox);
            return;
        }

        if (passwordBox.getText().trim().length() < 3)
        {
            showBubbleMessage (TRANS ("Please enter a valid password!"), passwordBox);
            return;
        }

        status.setUserEmail (emailBox.getText());

        addAndMakeVisible (unlockingOverlay = new OverlayComp (*this, showOverlayCancelButton));
        resized();
        unlockingOverlay->enterModalState();
    }
}

void OnlineUnlockForm::dismiss()
{
    delete this;
}

} // namespace juce
