<?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 mod_minilesson\local\itemtype;

use mod_minilesson\constants;

/**
 * Renderable class for a free writing item in a minilesson activity.
 *
 * @package    mod_minilesson
 * @copyright  2023 Justin Hunt <justin@poodll.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class item_freewriting extends item
{

    //the item type
    public const ITEMTYPE = constants::TYPE_FREEWRITING;


    /**
     * Export the data for the mustache template.
     *
     * @param \renderer_base $output renderer to be used to render the action bar elements.
     * @return array
     */
    public function export_for_template(\renderer_base $output)
    {

        $testitem = parent::export_for_template($output);
        $testitem = $this->set_layout($testitem);
        $testitem->relevance = $this->itemrecord->{constants::RELEVANCE};
        $testitem->totalmarks = $this->itemrecord->{constants::TOTALMARKS};
        $testitem->nopasting = $this->itemrecord->{constants::NOPASTING};
        if ($this->itemrecord->{constants::TARGETWORDCOUNT} > 0) {
            $testitem->targetwordcount = $this->itemrecord->{constants::TARGETWORDCOUNT};
            $testitem->textarearows = round($this->itemrecord->{constants::TARGETWORDCOUNT} / 10, 0) + 1;
            $testitem->countwords = true;
        }

        // We need cmid and itemid to do the AI evaluation by ajax.
        $testitem->itemid = $this->itemrecord->id;

        $testitem->reviewsettings['hidecorrections'] = !empty($this->itemrecord->{constants::FREEWRITING_HIDECORRECTION});
        $testitem->reviewsettings['showreviewdetailed'] = empty($this->itemrecord->{constants::FREEWRITING_SHOWRESULT}) ||
            $this->itemrecord->{constants::FREEWRITING_SHOWRESULT} == 1;
        $testitem->reviewsettings['showreviewbasic'] = !empty($this->itemrecord->{constants::FREEWRITING_SHOWRESULT}) &&
            $this->itemrecord->{constants::FREEWRITING_SHOWRESULT} == 2;
        $testitem->reviewsettings['showscorestarrating'] = empty($this->itemrecord->{constants::FREEWRITING_SHOWGRADE}) ||
            $this->itemrecord->{constants::FREEWRITING_SHOWGRADE} == 1;
        $testitem->reviewsettings['showscorepercentage'] = !empty($this->itemrecord->{constants::FREEWRITING_SHOWGRADE}) &&
            $this->itemrecord->{constants::FREEWRITING_SHOWGRADE} == 2;

        // Replace any template variables in the question text.
        if(!empty($testitem->itemtext)){
            $search = ['{topic}', '{ai data1}', '{ai data2}'];
            $replace = [
                $this->itemrecord->{constants::FREEWRITING_TOPIC},
                $this->itemrecord->{constants::FREEWRITING_AIDATA1},
                $this->itemrecord->{constants::FREEWRITING_AIDATA2},
            ];
            $testitem->itemtext = str_replace($search, $replace, $testitem->itemtext);
        }   
        // Cloudpoodll.
        $maxtime = $this->itemrecord->timelimit;
        $testitem = $this->set_cloudpoodll_details($testitem, $maxtime);

        return $testitem;
    }

    public static function validate_import($newrecord, $cm)
    {
        $error = new \stdClass();
        $error->col = '';
        $error->message = '';

        if ($newrecord->{constants::AIGRADE_INSTRUCTIONS} == '') {
            $error->col = constants::AIGRADE_INSTRUCTIONS;
            $error->message = get_string('error:emptyfield', constants::M_COMPONENT);
            return $error;
        }

        if ($newrecord->{constants::AIGRADE_FEEDBACK} == '') {
            $error->col = constants::AIGRADE_FEEDBACK;
            $error->message = get_string('error:emptyfield', constants::M_COMPONENT);
            return $error;
        }

        // return false to indicate no error
        return false;
    }

    /*
     * This is for use with importing, telling import class each column's is, db col name, minilesson specific data type
     */
    public static function get_keycolumns()
    {
        // get the basic key columns and customize a little for instances of this item type
        $keycols = parent::get_keycolumns();
        $keycols['int1'] = ['jsonname' => 'totalmarks', 'type' => 'int', 'optional' => true, 'default' => 0, 'dbname' => constants::TOTALMARKS];
        $keycols['int2'] = ['jsonname' => 'relevance', 'type' => 'int', 'optional' => true, 'default' => 0, 'dbname' => constants::RELEVANCE];
        $keycols['int3'] = ['jsonname' => 'targetwordcount', 'type' => 'int', 'optional' => true, 'default' => 0, 'dbname' => constants::TARGETWORDCOUNT];
        $keycols['int4'] = ['jsonname' => 'nopasting', 'type' => 'int', 'optional' => true, 'default' => 1, 'dbname' => constants::NOPASTING];
        $keycols['int5'] = ['jsonname' => 'gradingselection', 'type' => 'int', 'optional' => true, 'default' => 0, 'dbname' => constants::FREEWRITING_GRADINGSELECTION];
        $keycols['int6'] = ['jsonname' => 'feedbackselection', 'type' => 'int', 'optional' => true, 'default' => 0, 'dbname' => constants::FREEWRITING_FEEDBACKSELECTION];
        $keycols['int7'] = ['jsonname' => 'hidecorrection', 'type' => 'int', 'optional' => true, 'default' => 0, 'dbname' => constants::FREEWRITING_HIDECORRECTION];
        $keycols['int8'] = ['jsonname' => 'showgrade', 'type' => 'int', 'optional' => true, 'default' => 1, 'dbname' => constants::FREEWRITING_SHOWGRADE];
        $keycols['int9'] = ['jsonname' => 'showresult', 'type' => 'int', 'optional' => true, 'default' => 1, 'dbname' => constants::FREEWRITING_SHOWRESULT];
        $keycols['text6'] = ['jsonname' => 'aigradeinstructions', 'type' => 'string', 'optional' => false, 'default' => '', 'dbname' => constants::AIGRADE_INSTRUCTIONS];
        $keycols['text2'] = ['jsonname' => 'aigradefeedback', 'type' => 'string', 'optional' => false, 'default' => '', 'dbname' => constants::AIGRADE_FEEDBACK];
        $keycols['text3'] = ['jsonname' => 'modelanswer', 'type' => 'string', 'optional' => true, 'default' => '', 'dbname' => constants::AIGRADE_MODELANSWER];
        $keycols['text4'] = ['jsonname' => 'aigradefeedbacklanguage', 'type' => 'string', 'optional' => true, 'default' => 'en-US', 'dbname' => constants::AIGRADE_FEEDBACK_LANGUAGE];
        $keycols['text5'] = ['jsonname' => 'freewritingtopic', 'type' => 'string', 'optional' => false, 'default' => '', 'dbname' => constants::FREEWRITING_TOPIC];
        $keycols['data1'] = ['jsonname' => 'freewritingaidata1', 'type' => 'string', 'optional' => false, 'default' => '', 'dbname' => constants::FREEWRITING_AIDATA1];
        $keycols['data2'] = ['jsonname' => 'freewritingaidata2', 'type' => 'string', 'optional' => false, 'default' => '', 'dbname' => constants::FREEWRITING_AIDATA2];
        return $keycols;
    }

    /*
 This function return the prompt that the generate method requires. 
 */
    public static function aigen_fetch_prompt($itemtemplate, $generatemethod)
    {
        switch ($generatemethod) {

            case 'extract':
                $prompt = "Create a writing question(text) suitable for {level} level learners of {language} as a follow up activity on the following reading: [{text}] ";
                break;

            case 'reuse':
                // This is a special case where we reuse the existing data, so we do not need a prompt.
                // We don't call AI. So will just return an empty string.
                $prompt = "";
                break;

            case 'generate':
            default:
                $prompt = "Generate a writing question(text) suitable for {level} level learners of {language} on the topic of: [{topic}] ";
                break;
        }
        return $prompt;
    }

}
