/*
    Copyright (C) 2016 Carl Hetherington <cth@carlh.net>

    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 2 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, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include "im_cpl.h"
#include "util.h"
#include "xml.h"
#include "dcp_assert.h"
#include "segment.h"
#include <libcxml/cxml.h>
#include <libxml++/libxml++.h>
#include <boost/foreach.hpp>

using std::list;
using std::string;
using boost::shared_ptr;
using namespace dcp::im;

CPL::CPL (boost::filesystem::path file)
	: Asset (file)
{
	cxml::Document f ("CompositionPlaylist");
	f.read_file (file);

	_id = remove_urn_uuid (f.string_child ("Id"));

	/* XXX: I don't know whether these things are required or optional */

	_annotation = f.optional_string_child("Annotation").get_value_or ("");
	_issue_date = f.string_child("IssueDate");
	_issuer = f.optional_string_child("Issuer").get_value_or ("");
	_creator = f.optional_string_child("Creator").get_value_or ("");
	/* ContentOriginator? */
	_content_title = f.optional_string_child("ContentTitle").get_value_or ("");
	_content_kind = content_kind_from_string (f.string_child ("ContentKind"));
	BOOST_FOREACH (cxml::ConstNodePtr i, f.node_child("ContentVersionList")->node_children("ContentVersion")) {
		_content_versions.push_back (make_pair (remove_urn_uuid(i->string_child("Id")), i->string_child("LabelText")));
	}
	/* EssenceDescriptorList */
	_edit_rate = Fraction (f.string_child("EditRate"));
	/* ExtensionProperties */

	_segments = type_grand_children<Segment> (f, "SegmentList", "Segment");

	/* f.done (); */
}

void
CPL::resolve_refs (list<shared_ptr<Asset> > assets)
{
	/* XXX */
}

string
CPL::pkl_type (Standard standard) const
{
	switch (standard) {
	case DCP_INTEROP:
	case DCP_SMPTE:
		/* This class shouldn't be writing DCP CPLs */
		DCP_ASSERT (false);
	case IMP:
		return "text/xml";
	}

	return "";
}

/** Write an CompositonPlaylist XML file.
 *  @param file Filename to write.
 *  @param standard Must be IMP.
 *  @param signer Signer to sign the CPL, or 0 to add no signature.
 */
void
CPL::write_xml (boost::filesystem::path file, Standard standard, shared_ptr<const CertificateChain> signer) const
{
	xmlpp::Document doc;
	xmlpp::Element* root = 0;

	switch (standard) {
	case DCP_INTEROP:
	case DCP_SMPTE:
		/* This class shouldn't be writing DCP CPLs */
		root = doc.create_root_node ("CompositionPlaylist", "http://www.digicine.com/PROTO-ASDCP-CPL-20040511#");
		break;
	case IMP:
		root = doc.create_root_node ("CompositionPlaylist", "http://www.smpte-ra.org/schemas/429-7/2006/CPL");
		break;
	}

	if (signer) {
		root->set_namespace_declaration ("http://www.w3.org/2000/09/xmldsig#", "dsig");
	}

	/* XXX */

	set_file (file);
}