<?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/>.

/**
 * A class to display a table with user's own attempts on the activity's view page.
 *
 * @copyright  2022 onwards Vitaly Potenko <potenkov@gmail.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

namespace mod_adaptivequiz\output;

use renderable;
use stdClass;

final class ability_measure implements renderable {

    /**
     * @var float $abilitymeasure
     */
    public $measurevalue;
    /**
     * @var int $lowestquestiondifficulty
     */
    public $lowestquestiondifficulty;
    /**
     * @var int $highestquestiondifficulty
     */
    public $highestquestiondifficulty;

    /**
     * A convenience method to convert the object to what {@link mod_adaptivequiz_renderer::format_measure()} expects
     * to produce a formatted ability measure.
     */
    public function as_object_to_format(): stdClass {
        $return = new stdClass();
        $return->measure = $this->measurevalue;
        $return->lowestlevel = $this->lowestquestiondifficulty;
        $return->highestlevel = $this->highestquestiondifficulty;

        return $return;
    }

    /**
     * A named constructor to set up the object and increase code readability.
     *
     * @param stdClass $adaptivequiz A record from {adaptivequiz}. lowestlevel and highestlevel are the expected fields.
     * @param float $measurevalue
     * @return self
     */
    public static function of_attempt_on_adaptive_quiz(stdClass $adaptivequiz, float $measurevalue): self {
        $return = new self();
        $return->lowestquestiondifficulty = !empty($adaptivequiz->lowestlevel) ? $adaptivequiz->lowestlevel : 0;
        $return->highestquestiondifficulty = !empty($adaptivequiz->highestlevel) ? $adaptivequiz->highestlevel : 0;
        $return->measurevalue = $measurevalue;

        return $return;
    }
}