/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2020 Ian McInerney <ian.s.mcinerney@ieee.org>
 * Copyright (C) 2020 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * This program 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.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <id.h>
#include <widgets/infobar.h>
#include "wx/artprov.h"
#include <wx/aui/framemanager.h>
#include <wx/debug.h>
#include <wx/infobar.h>
#include <wx/sizer.h>
#include <wx/timer.h>
#include <wx/hyperlink.h>
#include <eda_base_frame.h>


wxDEFINE_EVENT( KIEVT_SHOW_INFOBAR,    wxCommandEvent );
wxDEFINE_EVENT( KIEVT_DISMISS_INFOBAR, wxCommandEvent );

BEGIN_EVENT_TABLE( WX_INFOBAR, wxInfoBarGeneric )
    EVT_COMMAND( wxID_ANY, KIEVT_SHOW_INFOBAR,    WX_INFOBAR::onShowInfoBar )
    EVT_COMMAND( wxID_ANY, KIEVT_DISMISS_INFOBAR, WX_INFOBAR::onDismissInfoBar )

    EVT_BUTTON( ID_CLOSE_INFOBAR, WX_INFOBAR::onCloseButton )
    EVT_TIMER(  ID_CLOSE_INFOBAR, WX_INFOBAR::onTimer )
END_EVENT_TABLE()


WX_INFOBAR::WX_INFOBAR( wxWindow* aParent, wxAuiManager* aMgr, wxWindowID aWinid )
        : wxInfoBarGeneric( aParent, aWinid ),
          m_showTime( 0 ),
          m_updateLock( false ),
          m_showTimer( nullptr ),
          m_auiManager( aMgr )
{
    m_showTimer = new wxTimer( this, ID_CLOSE_INFOBAR );

    SetShowHideEffects( wxSHOW_EFFECT_ROLL_TO_BOTTOM, wxSHOW_EFFECT_ROLL_TO_TOP );
    SetEffectDuration( 300 );

    // The infobar seems to start too small, so increase its height
    int sx, sy;
    GetSize( &sx, &sy );
    sy = 1.5 * sy;
    SetSize( sx, sy );

    // The bitmap gets cutoff sometimes with the default size, so force it to be the same
    // height as the infobar.
    wxSizer* sizer    = GetSizer();
    wxSize   iconSize = wxArtProvider::GetSizeHint( wxART_BUTTON );

    sizer->SetItemMinSize( (size_t) 0, iconSize.x, sy );

    // Forcefully remove all existing buttons added by the wx constructors.
    // The default close button doesn't work with the AUI manager update scheme, so this
    // ensures any close button displayed is ours.
    RemoveAllButtons();

    Layout();

    m_parent->Bind( wxEVT_SIZE, &WX_INFOBAR::onSize, this );
}


WX_INFOBAR::~WX_INFOBAR()
{
    delete m_showTimer;
}


void WX_INFOBAR::SetShowTime( int aTime )
{
    m_showTime = aTime;
}


void WX_INFOBAR::QueueShowMessage( const wxString& aMessage, int aFlags )
{
    wxCommandEvent* evt = new wxCommandEvent( KIEVT_SHOW_INFOBAR );

    evt->SetString( aMessage.c_str() );
    evt->SetInt( aFlags );

    GetEventHandler()->QueueEvent( evt );
}


void WX_INFOBAR::QueueDismiss()
{
    wxCommandEvent* evt = new wxCommandEvent( KIEVT_DISMISS_INFOBAR );

    GetEventHandler()->QueueEvent( evt );
}


void WX_INFOBAR::ShowMessageFor( const wxString& aMessage, int aTime, int aFlags )
{
    // Don't do anything if we requested the UI update
    if( m_updateLock )
        return;

    m_showTime = aTime;
    ShowMessage( aMessage, aFlags );
}


void WX_INFOBAR::ShowMessage( const wxString& aMessage, int aFlags )
{
    // Don't do anything if we requested the UI update
    if( m_updateLock )
        return;

    m_updateLock = true;

    wxInfoBarGeneric::ShowMessage( aMessage, aFlags );

    if( m_auiManager )
        updateAuiLayout( true );

    if( m_showTime > 0 )
        m_showTimer->StartOnce( m_showTime );

    m_updateLock = false;
}


void WX_INFOBAR::Dismiss()
{
    // Don't do anything if we requested the UI update
    if( m_updateLock )
        return;

    m_updateLock = true;

    wxInfoBarGeneric::Dismiss();

    if( m_auiManager )
        updateAuiLayout( false );

    if( m_callback )
        (*m_callback)();

    m_updateLock = false;
}


void WX_INFOBAR::onSize( wxSizeEvent& aEvent )
{
    int barWidth = GetSize().GetWidth();

    // Calculate the horizontal size: because the infobar is shown on top of the draw canvas
    // it is adjusted to the canvas width.
    // On Mac, the canvas is the parent
    // On other OS the parent is EDA_BASE_FRAME thta contains the canvas
    int parentWidth = m_parent->GetClientSize().GetWidth();
    EDA_BASE_FRAME* frame = dynamic_cast<EDA_BASE_FRAME*>( m_parent );

    if( frame && frame->GetToolCanvas() )
        parentWidth = frame->GetToolCanvas()->GetSize().GetWidth();


    if( barWidth != parentWidth )
        SetSize( parentWidth, GetSize().GetHeight() );

    aEvent.Skip();
}


void WX_INFOBAR::updateAuiLayout( bool aShow )
{
    wxASSERT( m_auiManager );

    wxAuiPaneInfo& pane = m_auiManager->GetPane( this );

    // If the infobar is in a pane, then show/hide the pane
    if( pane.IsOk() )
    {
        if( aShow )
            pane.Show();
        else
            pane.Hide();
    }

    // Update the AUI manager regardless
    m_auiManager->Update();
}


void WX_INFOBAR::AddButton( wxWindowID aId, const wxString& aLabel )
{
    wxButton* button = new wxButton( this, aId, aLabel );

    AddButton( button );
}


void WX_INFOBAR::AddButton( wxButton* aButton )
{
    wxSizer* sizer = GetSizer();

    wxASSERT( aButton );

#ifdef __WXMAC__
    // Based on the code in the original class:
    // smaller buttons look better in the (narrow) info bar under OS X
    aButton->SetWindowVariant( wxWINDOW_VARIANT_SMALL );
#endif // __WXMAC__
    sizer->Add( aButton, wxSizerFlags().Centre().Border( wxRIGHT ) );

    if( IsShown() )
        sizer->Layout();
}


void WX_INFOBAR::AddButton( wxHyperlinkCtrl* aHypertextButton )
{
    wxSizer* sizer = GetSizer();

    wxASSERT( aHypertextButton );

    sizer->Add( aHypertextButton, wxSizerFlags().Centre().Border( wxRIGHT ) );

    if( IsShown() )
        sizer->Layout();
}


void WX_INFOBAR::AddCloseButton( const wxString& aTooltip )
{
    wxBitmapButton* button = wxBitmapButton::NewCloseButton( this, ID_CLOSE_INFOBAR );

    button->SetToolTip( aTooltip );

    AddButton( button );
}


void WX_INFOBAR::RemoveAllButtons()
{
    wxSizer* sizer = GetSizer();

    if( sizer->GetItemCount() == 0 )
        return;

    // The last item is already the spacer
    if( sizer->GetItem( sizer->GetItemCount() - 1 )->IsSpacer() )
        return;

    for( int i = sizer->GetItemCount() - 1; i >= 0; i-- )
    {
        wxSizerItem* sItem = sizer->GetItem( i );

        // The spacer is the end of the custom buttons
        if( sItem->IsSpacer() )
            break;

        delete sItem->GetWindow();
    }
}


bool WX_INFOBAR::HasCloseButton() const
{
    wxSizer* sizer = GetSizer();

    if( sizer->GetItemCount() == 0 )
        return false;

    if( sizer->GetItem( sizer->GetItemCount() - 1 )->IsSpacer() )
        return false;

    wxSizerItem* item = sizer->GetItem( sizer->GetItemCount() - 1 );

    return ( item->GetWindow()->GetId() == ID_CLOSE_INFOBAR );
}


void WX_INFOBAR::onShowInfoBar( wxCommandEvent& aEvent )
{
    RemoveAllButtons();
    AddCloseButton();
    ShowMessage( aEvent.GetString(), aEvent.GetInt() );
}


void WX_INFOBAR::onDismissInfoBar( wxCommandEvent& aEvent )
{
    Dismiss();
}


void WX_INFOBAR::onCloseButton( wxCommandEvent& aEvent )
{
    Dismiss();
}


void WX_INFOBAR::onTimer( wxTimerEvent& aEvent )
{
    // Reset and clear the timer
    m_showTimer->Stop();
    m_showTime = 0;

    Dismiss();
}


EDA_INFOBAR_PANEL::EDA_INFOBAR_PANEL( wxWindow* aParent, wxWindowID aId, const wxPoint& aPos,
                                      const wxSize& aSize, long aStyle, const wxString& aName )
         : wxPanel( aParent, aId, aPos, aSize, aStyle, aName )
{
    m_mainSizer = new wxFlexGridSizer( 1, 0, 0 );

    m_mainSizer->SetFlexibleDirection( wxBOTH );
    m_mainSizer->AddGrowableCol( 0, 1 );

    SetSizer( m_mainSizer );
}


void EDA_INFOBAR_PANEL::AddInfoBar( WX_INFOBAR* aInfoBar )
{
    wxASSERT( aInfoBar );

    aInfoBar->Reparent( this );
    m_mainSizer->Add( aInfoBar, 1, wxEXPAND, 0 );
    m_mainSizer->Layout();
}


void EDA_INFOBAR_PANEL::AddOtherItem( wxWindow* aOtherItem )
{
    wxASSERT( aOtherItem );

    aOtherItem->Reparent( this );
    m_mainSizer->Add( aOtherItem, 1, wxEXPAND, 0 );

    m_mainSizer->AddGrowableRow( 1, 1 );
    m_mainSizer->Layout();
}