/*
    Copyright (C) 2017-2020 Carl Hetherington <cth@carlh.net>

    This file is part of DCP-o-matic.

    DCP-o-matic 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 2 of the License, or
    (at your option) any later version.

    DCP-o-matic 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 DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.

*/


#include "check_box.h"
#include "dcpomatic_choice.h"
#include "export_subtitles_dialog.h"
#include "file_picker_ctrl.h"
#include "wx_util.h"
#include <dcp/warnings.h>
LIBDCP_DISABLE_WARNINGS
#include <wx/filepicker.h>
LIBDCP_ENABLE_WARNINGS
#include <boost/bind/bind.hpp>


using std::string;
using boost::bind;


ExportSubtitlesDialog::ExportSubtitlesDialog(wxWindow* parent, int reels, bool interop)
	: wxDialog(parent, wxID_ANY, _("Export subtitles"))
{
	auto sizer = new wxGridBagSizer(DCPOMATIC_SIZER_GAP, DCPOMATIC_SIZER_GAP);

	int r = 0;

	add_label_to_sizer(sizer, this, _("Format"), true, wxGBPosition(r, 0));
	_format = new Choice(this);
	_format->add_entry(_("XML (Interop)"));
	_format->add_entry(_("MXF (SMPTE)"));
	_format->set(interop ? 0 : 1);
	sizer->Add(_format, wxGBPosition(r, 1));
	++r;

	_split_reels = new CheckBox(this, _("Write reels into separate files"));
	sizer->Add(_split_reels, wxGBPosition(r, 0), wxGBSpan(1, 2));
	++r;

	if (reels > 1) {
		_split_reels->Enable(false);
	}

	_include_font = new CheckBox(this, _("Define font in output and export font file"));
	sizer->Add(_include_font, wxGBPosition(r, 0), wxGBSpan(1, 2));
	++r;

	_file_label = add_label_to_sizer(sizer, this, _("Output file"), true, wxGBPosition(r, 0));
	_file = new FilePickerCtrl(this, _("Select output file"), wxT(""), false, true, "ExportSubtitlesPath");
	sizer->Add(_file, wxGBPosition(r, 1));
	++r;

	_dir_label = add_label_to_sizer(sizer, this, _("Output folder"), true, wxGBPosition(r, 0));
	_dir = new DirPickerCtrl(this);
	sizer->Add(_dir, wxGBPosition(r, 1));

	_format->bind(&ExportSubtitlesDialog::format_changed, this);
	_split_reels->bind(&ExportSubtitlesDialog::setup_sensitivity, this);
	_include_font->bind(&ExportSubtitlesDialog::setup_sensitivity, this);
	_file->Bind(wxEVT_FILEPICKER_CHANGED, bind(&ExportSubtitlesDialog::setup_sensitivity, this));
	_dir->Bind(wxEVT_DIRPICKER_CHANGED, bind(&ExportSubtitlesDialog::setup_sensitivity, this));

	auto overall_sizer = new wxBoxSizer(wxVERTICAL);
	overall_sizer->Add(sizer, 1, wxALL, DCPOMATIC_DIALOG_BORDER);

	auto buttons = CreateSeparatedButtonSizer(wxOK | wxCANCEL);
	if (buttons) {
		overall_sizer->Add(buttons, wxSizerFlags().Expand().DoubleBorder());
	}

	SetSizerAndFit(overall_sizer);
	setup_sensitivity();
	setup_wildcard();
}


void
ExportSubtitlesDialog::format_changed()
{
	setup_sensitivity();
	setup_wildcard();
}


void
ExportSubtitlesDialog::setup_wildcard()
{
	_file->set_wildcard(standard() == dcp::Standard::INTEROP ? _("Subtitle files (.xml)|*.xml") : _("Subtitle files (.mxf)|*.mxf"));
}


dcp::Standard
ExportSubtitlesDialog::standard() const
{
	switch (_format->get().get_value_or(0)) {
	case 0:
		return dcp::Standard::INTEROP;
	case 1:
		return dcp::Standard::SMPTE;
	}

	DCPOMATIC_ASSERT(false);
	return dcp::Standard::SMPTE;
}


void
ExportSubtitlesDialog::setup_sensitivity()
{
	bool const multi = split_reels() || (standard() == dcp::Standard::INTEROP && _include_font->GetValue());
	_include_font->Enable(standard() == dcp::Standard::INTEROP);
	_file_label->Enable(!multi);
	_file->Enable(!multi);
	_dir_label->Enable(multi);
	_dir->Enable(multi);

	wxButton* ok = dynamic_cast<wxButton *>(FindWindowById(wxID_OK, this));
	DCPOMATIC_ASSERT(ok);
	ok->Enable(path().is_absolute());
}


/** @return Either a full path to a file, if the output will be one file, or
 *  a full path to a directory.
 */
boost::filesystem::path
ExportSubtitlesDialog::path() const
{
	if (_file->IsEnabled()) {
		if (auto path = _file->path()) {
			wxFileName fn(std_to_wx(path->string()));
			fn.SetExt(char_to_wx(standard() == dcp::Standard::INTEROP ? "xml" : "mxf"));
			return wx_to_std(fn.GetFullPath());
		}
	}

	return wx_to_std(_dir->GetPath());
}


bool
ExportSubtitlesDialog::split_reels() const
{
	return _split_reels->GetValue();
}


bool
ExportSubtitlesDialog::include_font() const
{
	return standard() == dcp::Standard::SMPTE || _include_font->GetValue();
}