/*
    Copyright (C) 2018 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_content_change_job.h"
#include "job_manager.h"
#include "examine_content_job.h"
#include "content.h"
#include "film.h"
#include <iostream>

#include "i18n.h"

using std::string;
using std::list;
using std::cout;
using std::shared_ptr;

/** @param gui true if we are running this job from the GUI, false if it's the CLI */
CheckContentChangeJob::CheckContentChangeJob (shared_ptr<const Film> film, shared_ptr<Job> following, bool gui)
	: Job (film)
	, _following (following)
	, _gui (gui)
{

}

CheckContentChangeJob::~CheckContentChangeJob ()
{
	stop_thread ();
}

string
CheckContentChangeJob::name () const
{
	return _("Checking content for changes");
}

string
CheckContentChangeJob::json_name () const
{
	return N_("check_content_change");
}

void
CheckContentChangeJob::run ()
{
	set_progress_unknown ();

	list<shared_ptr<Content> > changed;

	for (auto i: _film->content()) {
		bool ic = false;
		for (size_t j = 0; j < i->number_of_paths(); ++j) {
			if (boost::filesystem::last_write_time(i->path(j)) != i->last_write_time(j)) {
				ic = true;
				break;
			}
		}
		if (!ic && i->calculate_digest() != i->digest()) {
			ic = true;
		}
		if (ic) {
			changed.push_back (i);
		}
	}

	if (!changed.empty()) {
		if (_gui) {
			for (auto i: changed) {
				JobManager::instance()->add(shared_ptr<Job>(new ExamineContentJob(_film, i)));
			}
			string m = _("Some files have been changed since they were added to the project.\n\nThese files will now be re-examined, so you may need to check their settings.");
			if (_following) {
				/* I'm assuming that _following is a make DCP job */
				m += "  ";
				m += _("Choose 'Make DCP' again when you have done this.");
			}
			set_message (m);
		} else {
			set_progress (1);
			set_state (FINISHED_ERROR);
			set_error (
				_("Some files have been changed since they were added to the project.  Open the project in DCP-o-matic, check the settings, then save it before trying again."),
				""
				);
			return;
		}
	} else if (_following) {
		JobManager::instance()->add (_following);
	}

	/* Only set this job as finished once we have added the following job, otherwise I think
	   it's possible that the tests will sporadically fail if they check for all jobs being
	   complete in the gap between this one finishing and _following being added.
	*/

	set_progress (1);
	set_state (FINISHED_OK);
}