/* 
 * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
 *
 * 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; version 2 of the
 * License.
 * 
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301  USA
 */

#include "snippet_popover.h"

#include "mforms/imagebox.h"
#include "mforms/textentry.h"
#include "mforms/label.h"
#include "mforms/panel.h"
#include "mforms/app.h"
#include "mforms/code_editor.h"
#include "mforms/button.h"
#include "mforms/box.h"

#include "base/log.h"

using namespace std;

using namespace wb;
using namespace mforms;

//----------------- Separator ----------------------------------------------------------------------

void Separator::get_layout_size( int* w, int* h )
{
  *w = 100; // Will be adjusted by the layout process.
  *h = 4; // 2 pixels extra vertical space to match the design.
}

//--------------------------------------------------------------------------------------------------

void wb::Separator::repaint( cairo_t *cr, int x, int y, int w, int h )
{
  float width = get_width() + 0.5f;

  cairo_set_line_width(cr, 1);

  cairo_set_source_rgb(cr, 212 / 255.0f, 212 / 255.0f, 212 / 255.0f);
  cairo_move_to(cr, 0.5f, 0.5f);
  cairo_line_to(cr, width, 0.5f);
  cairo_stroke(cr);

  cairo_set_source_rgb(cr, 246 / 255.0f, 246 / 255.0f, 246 / 255.0f);
  cairo_move_to(cr, 0.5f, 1.5f);
  cairo_line_to(cr, width, 1.5f);
  cairo_stroke(cr);
}

//----------------- SnippetPopover -----------------------------------------------------------------

SnippetPopover::SnippetPopover()
  : Popover(mforms::PopoverStyleNormal)
{
   _content = manage(new Box(false));

  _header = manage(new Box(true));
  _header->set_spacing(10);
  ImageBox* image = manage(new ImageBox());
  image->set_image(mforms::App::get()->get_resource_path("snippet_sql.png"));
  _heading_label = manage(new Label("Heading"), false);
  _heading_label->set_style(mforms::BoldStyle);
  _heading_entry = manage(new TextEntry(), false);
  _header->add(image, false, true);
  _header->add(_heading_label, true, true);

  Separator* separator = manage(new Separator());

  Panel* border_panel = manage(new Panel(mforms::FilledPanel));
  border_panel->set_back_color("#cdcdcd");
  border_panel->set_padding(1);
  _editor = manage(new CodeEditor());
  _editor->set_language(mforms::LanguageMySQL);
  _editor->set_text("USE SQL CODE;");
  _editor->set_features(mforms::FeatureGutter, false);
  _editor->signal_changed()->connect(boost::bind(&SnippetPopover::text_changed, this, _1, _2));
  border_panel->add(_editor);

  Box* button_box = manage(new Box(true));
  button_box->set_spacing(8);

  _revert_button = manage(new Button(mforms::ToolButton));
  _revert_button->set_tooltip("Discard all changes and revert to the current version");
  _revert_button->set_icon(App::get()->get_resource_path(
#ifdef __APPLE__
    "tiny_undo_mac.png"
#else
    "tiny_undo.png"
#endif
  ));
  _revert_button->signal_clicked()->connect(boost::bind(&SnippetPopover::revert_clicked, this));

  _edit_button = manage(new Button());
  _edit_button->set_text("Edit");
  _edit_button->set_size(65, -1);
  _edit_button->signal_clicked()->connect(boost::bind(&SnippetPopover::edit_clicked, this));

  _close_button = manage(new Button());
  _close_button->set_text("Done");
  _close_button->set_size(65, -1);
  _close_button->signal_clicked()->connect(boost::bind(&SnippetPopover::close_clicked, this));
  
  button_box->add(_revert_button, false, true);
  button_box->add_end(_close_button, false, true);
  button_box->add_end(_edit_button, false, true);

  _content->add(_header, false, true);
  _content->add(separator, false, true);
  _content->add(border_panel, true, true);
  _content->add_end(button_box, false, true);
  _content->set_spacing(4);

  set_content(_content);
}

//--------------------------------------------------------------------------------------------------

SnippetPopover::~SnippetPopover()
{
  _heading_label->release();
  _heading_entry->release();
  _content->release();
}

//--------------------------------------------------------------------------------------------------

void SnippetPopover::revert_clicked()
{
  _heading_label->set_text(_original_heading);
  _heading_entry->set_value(_original_heading);
  _editor->set_value(_original_text);
  _revert_button->set_enabled(false);
  set_read_only(true);
}

//--------------------------------------------------------------------------------------------------

void SnippetPopover::edit_clicked()
{
  set_read_only(false);
}

//--------------------------------------------------------------------------------------------------

void SnippetPopover::close_clicked()
{
  close();
  _closed();
}

//--------------------------------------------------------------------------------------------------

void SnippetPopover::text_changed(int start_line, int lines_changed)
{
  _revert_button->set_enabled(true);
}

//--------------------------------------------------------------------------------------------------

void SnippetPopover::set_heading(const std::string& text)
{
  _original_heading = text;
  _heading_entry->set_value(text);
  _heading_label->set_text(text);
}

//--------------------------------------------------------------------------------------------------

void SnippetPopover::set_text(const std::string& text)
{
  _original_text = text;
  _editor->set_value(text);
  _revert_button->set_enabled(false);
}

//--------------------------------------------------------------------------------------------------

void SnippetPopover::set_read_only(bool flag)
{
  // We have to exchange a label and a text entry, depending on the read-only state
  // because we cannot give the text entry a display format and cannot edit a label.
  if (flag)
  {
    _heading_label->set_text(_heading_entry->get_string_value());
    if (_header->contains_subview(_heading_entry))
      _header->remove(_heading_entry);
    if (!_header->contains_subview(_heading_label))
      _header->add(_heading_label, true, true);
  }
  else
  {
    if (_header->contains_subview(_heading_label))
      _header->remove(_heading_label);
    if (!_header->contains_subview(_heading_entry))
      _header->add(_heading_entry, true, true);
    _heading_entry->focus();
  }
  _editor->set_features(mforms::FeatureReadOnly, flag);
  _edit_button->set_enabled(flag);
}

//--------------------------------------------------------------------------------------------------

std::string SnippetPopover::get_text()
{
  return _editor->get_text(false);
}

//--------------------------------------------------------------------------------------------------

std::string SnippetPopover::get_heading()
{
  return _heading_entry->get_string_value();
}

//--------------------------------------------------------------------------------------------------

bool SnippetPopover::has_changed()
{
  // We don't have a change event from the text entry so we compare the content instead.
  return _revert_button->is_enabled() || (_heading_entry->get_string_value() != _original_heading);
}

//--------------------------------------------------------------------------------------------------