<?php
/**
 * webtrees: online genealogy
 * Copyright (C) 2018 webtrees development team
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */
declare(strict_types=1);

namespace Fisharebest\Webtrees\Statistics\Google;

use Fisharebest\Webtrees\I18N;
use Fisharebest\Webtrees\Statistics\AbstractGoogle;
use Fisharebest\Webtrees\Statistics\Helper\Century;
use Fisharebest\Webtrees\Tree;

/**
 *
 */
class ChartMarriageAge extends AbstractGoogle
{
    /**
     * @var Century
     */
    private $centuryHelper;

    /**
     * Constructor.
     *
     * @param Tree $tree
     */
    public function __construct(Tree $tree)
    {
        parent::__construct($tree);

        $this->centuryHelper = new Century();
    }

    /**
     * Returns the related database records.
     *
     * @param string $sex
     *
     * @return \stdClass[]
     */
    private function queryRecords(string $sex): array
    {
        // TODO
        return $this->runSql(
            'SELECT '
            . ' ROUND(AVG(married.d_julianday2-birth.d_julianday1-182.5)/365.25,1) AS age, '
            .  ' ROUND((married.d_year - 50) / 100) AS century,'
            . " 'M' AS sex "
            . 'FROM `##dates` AS married '
            . 'JOIN `##families` AS fam ON (married.d_gid=fam.f_id AND married.d_file=fam.f_file) '
            . 'JOIN `##dates` AS birth ON (birth.d_gid=fam.f_husb AND birth.d_file=fam.f_file) '
            . 'WHERE '
            . " '{$sex}' IN ('M', 'BOTH') AND "
            . " married.d_file={$this->tree->id()} AND married.d_type IN ('@#DGREGORIAN@', '@#DJULIAN@') AND married.d_fact='MARR' AND "
            . " birth.d_type IN ('@#DGREGORIAN@', '@#DJULIAN@') AND birth.d_fact='BIRT' AND "
            . ' married.d_julianday1>birth.d_julianday1 AND birth.d_julianday1<>0 '
            . 'GROUP BY century, sex '
            . 'UNION ALL '
            . 'SELECT '
            . ' ROUND(AVG(married.d_julianday2-birth.d_julianday1-182.5)/365.25,1) AS age, '
            . ' ROUND((married.d_year - 50) / 100) AS century,'
            . " 'F' AS sex "
            . 'FROM `##dates` AS married '
            . 'JOIN `##families` AS fam ON (married.d_gid=fam.f_id AND married.d_file=fam.f_file) '
            . 'JOIN `##dates` AS birth ON (birth.d_gid=fam.f_wife AND birth.d_file=fam.f_file) '
            . 'WHERE '
            . " '{$sex}' IN ('F', 'BOTH') AND "
            . " married.d_file={$this->tree->id()} AND married.d_type IN ('@#DGREGORIAN@', '@#DJULIAN@') AND married.d_fact='MARR' AND "
            . " birth.d_type IN ('@#DGREGORIAN@', '@#DJULIAN@') AND birth.d_fact='BIRT' AND "
            . ' married.d_julianday1>birth.d_julianday1 AND birth.d_julianday1<>0 '
            . ' GROUP BY century, sex ORDER BY century'
        );
    }

    /**
     * General query on ages at marriage.
     *
     * @return string
     */
    public function chartMarriageAge(): string
    {
        $sex = 'BOTH';
        $out = [];

        foreach ($this->queryRecords($sex) as $record) {
            $out[(int) $record->century][$record->sex] = (float) $record->age;
        }

        $data = [
            [
                I18N::translate('Century'),
                I18N::translate('Males'),
                I18N::translate('Females'),
                I18N::translate('Average age'),
            ]
        ];

        foreach ($out as $century => $values) {
            $female_age  = $values['F'] ?? 0;
            $male_age    = $values['M'] ?? 0;
            $average_age = ($female_age + $male_age) / 2.0;

            $data[] = [
                $this->centuryHelper->centuryName($century),
                $male_age,
                $female_age,
                $average_age,
            ];
        }

        return view(
            'statistics/other/charts/combo',
            [
                'data'            => $data,
                'colors'          => ['#84beff', '#ffd1dc', '#ff0000'],
                'chart_title'     => I18N::translate('Average age in century of marriage'),
                'chart_sub_title' => I18N::translate('Average age at marriage'),
                'hAxis_title'     => I18N::translate('Century'),
                'vAxis_title'     => I18N::translate('Age'),
            ]
        );
    }
}