<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle 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.
//
// Moodle 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 Moodle.  If not, see <http://www.gnu.org/licenses/>.

namespace qtype_truefalse;

use question_state;

defined('MOODLE_INTERNAL') || die();

global $CFG;
require_once($CFG->dirroot . '/question/engine/tests/helpers.php');


/**
 * Walkthrough tests for the truefalse question type.
 *
 * @package    qtype_truefalse
 * @copyright  2011 The Open University
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 * @covers     \qtype_truefalse_question
 */
class walkthrough_test extends \qbehaviour_walkthrough_test_base {
    public function test_false_right_does_not_show_feedback_when_not_answered() {

        // Create a true-false question with correct answer false.
        $tf = \test_question_maker::make_question('truefalse', 'false');
        $this->start_attempt_at_question($tf, 'deferredfeedback', 1);

        // Check the initial state.
        $this->check_current_state(question_state::$todo);
        $this->check_current_mark(null);
        $this->check_current_output(
                $this->get_contains_question_text_expectation($tf),
                $this->get_does_not_contain_feedback_expectation(),
                new \question_contains_tag_with_contents('h4',
                        get_string('questiontext', 'question')));
        $this->assertEquals(get_string('false', 'qtype_truefalse'),
                $this->quba->get_right_answer_summary($this->slot));
        $this->assertMatchesRegularExpression('/' . preg_quote($tf->questiontext, '/') . '/',
                $this->quba->get_question_summary($this->slot));
        $this->assertNull($this->quba->get_response_summary($this->slot));

        // Finish the attempt without answering.
        $this->quba->finish_all_questions();

        // Verify.
        $this->check_current_state(question_state::$gaveup);
        $this->check_current_mark(null);
        $this->check_current_output(
                $this->get_contains_tf_true_radio_expectation(false, false),
                $this->get_contains_tf_false_radio_expectation(false, false),

                // In particular, check that the false feedback is not displayed.
                new \question_no_pattern_expectation('/' . preg_quote($tf->falsefeedback, '/') . '/'));

    }

    public function test_each_attempt_builds_on_last_and_regrade() {

        // Create a true-false question with correct answer false.
        $tf = \test_question_maker::make_question('truefalse', 'false');
        $this->start_attempt_at_question(clone($tf), 'deferredfeedback', 1);

        // Submit the answer false (correct).
        $this->process_submission(['answer' => 0]);

        // Finish the attempt.
        $this->quba->finish_all_questions();

        // Check the state.
        $this->check_current_state(question_state::$gradedright);
        $this->check_current_mark(1);
        $this->check_current_output(
                $this->get_contains_tf_true_radio_expectation(false, false),
                $this->get_contains_tf_false_radio_expectation(false, true));

        // Start a new attempt based on the first one.
        $firstattemptqa = $this->quba->get_question_attempt($this->slot);
        $this->quba = \question_engine::make_questions_usage_by_activity('unit_test',
                \context_system::instance());
        $this->quba->set_preferred_behaviour('deferredfeedback');
        $this->slot = $this->quba->add_question(clone($tf), 1);
        $this->quba->start_question_based_on($this->slot, $firstattemptqa);

        // Verify.
        $this->check_current_state(question_state::$complete);
        $this->check_current_mark(null);
        $this->check_current_output(
                $this->get_contains_tf_true_radio_expectation(true, false),
                $this->get_contains_tf_false_radio_expectation(true, true));

        // Finish the attempt without changing the answer.
        $this->quba->finish_all_questions();

        // Check the state.
        $this->check_current_state(question_state::$gradedright);
        $this->check_current_mark(1);
        $this->check_current_output(
                $this->get_contains_tf_true_radio_expectation(false, false),
                $this->get_contains_tf_false_radio_expectation(false, true));

        // Regrade the attempt - code based on question_usage_by_activity::regrade_question.
        $oldqa = $this->quba->get_question_attempt($this->slot);
        $newqa = new \question_attempt(clone($tf),
                $oldqa->get_usage_id(), $this->quba->get_observer());
        $newqa->set_database_id($oldqa->get_database_id());
        $newqa->set_slot($oldqa->get_slot());
        $newqa->regrade($oldqa, true);

        // Check the state.
        $this->assertEquals(question_state::$gradedright, $newqa->get_state());
        $this->assertEquals(1, $newqa->get_mark());
    }
}
