<?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/>.
 */
namespace Fisharebest\Webtrees\Module;

use Fisharebest\Webtrees\Auth;
use Fisharebest\Webtrees\Database;
use Fisharebest\Webtrees\Functions\FunctionsPrintLists;
use Fisharebest\Webtrees\I18N;
use Fisharebest\Webtrees\Tree;
use Symfony\Component\HttpFoundation\Request;

/**
 * Class TopSurnamesModule
 */
class TopSurnamesModule extends AbstractModule implements ModuleBlockInterface
{
    // Default values for new blocks.
    const DEFAULT_NUMBER = '10';
    const DEFAULT_STYLE  = 'table';

    /**
     * How should this module be labelled on tabs, menus, etc.?
     *
     * @return string
     */
    public function getTitle(): string
    {
        /* I18N: Name of a module. Top=Most common */
        return I18N::translate('Top surnames');
    }

    /**
     * A sentence describing what this module does.
     *
     * @return string
     */
    public function getDescription(): string
    {
        /* I18N: Description of the “Top surnames” module */
        return I18N::translate('A list of the most popular surnames.');
    }

    /**
     * Generate the HTML content of this block.
     *
     * @param Tree     $tree
     * @param int      $block_id
     * @param bool     $template
     * @param string[] $cfg
     *
     * @return string
     */
    public function getBlock(Tree $tree, int $block_id, bool $template = true, array $cfg = []): string
    {
        global $ctype;

        $num       = (int) $this->getBlockSetting($block_id, 'num', self::DEFAULT_NUMBER);
        $infoStyle = $this->getBlockSetting($block_id, 'infoStyle', self::DEFAULT_STYLE);

        extract($cfg, EXTR_OVERWRITE);

         // Use the count of base surnames.
        $top_surnames = Database::prepare(
            "SELECT n_surn FROM `##name`" .
            " WHERE n_file = :tree_id AND n_type != '_MARNM' AND n_surn NOT IN ('@N.N.', '')" .
            " GROUP BY n_surn" .
            " ORDER BY COUNT(n_surn) DESC" .
            " LIMIT :limit"
        )->execute([
            'tree_id' => $tree->getTreeId(),
            'limit'   => $num,
        ])->fetchOneColumn();

        $all_surnames = [];
        foreach ($top_surnames as $top_surname) {
            $variants = Database::prepare(
                "SELECT n_surname COLLATE utf8_bin, COUNT(*) FROM `##name` WHERE n_file = :tree_id AND n_surn COLLATE :collate = :surname GROUP BY 1"
            )->execute([
                'collate' => I18N::collation(),
                'surname' => $top_surname,
                'tree_id' => $tree->getTreeId(),
            ])->fetchAssoc();

            $all_surnames[$top_surname] = $variants;
        }

        switch ($infoStyle) {
            case 'tagcloud':
                uksort($all_surnames, [I18N::class, 'strcasecmp']);
                $content = FunctionsPrintLists::surnameTagCloud($all_surnames, 'individual-list', true, $tree);
                break;
            case 'list':
                uasort($all_surnames,  array($this, 'surnameCountSort'));
                $content = FunctionsPrintLists::surnameList($all_surnames, 1, true, 'individual-list', $tree);
                break;
            case 'array':
                uasort($all_surnames,  array($this, 'surnameCountSort'));
                $content = FunctionsPrintLists::surnameList($all_surnames, 2, true, 'individual-list', $tree);
                break;
            case 'table':
            default:
                $content = view('lists/surnames-table', [
                    'surnames' => $all_surnames,
                    'route'    => 'individual-list',
                    'tree'     => $tree,
                ]);
                break;
        }

        if ($template) {
            $num = count($top_surnames);
            if ($num === 1) {
                // I18N: i.e. most popular surname.
                $title = I18N::translate('Top surname');
            } else {
                // I18N: Title for a list of the most common surnames, %s is a number. Note that a separate translation exists when %s is 1
                $title = I18N::plural('Top %s surname', 'Top %s surnames', $num, I18N::number($num));
            }

            if ($ctype === 'gedcom' && Auth::isManager($tree)) {
                $config_url = route('tree-page-block-edit', [
                    'block_id' => $block_id,
                    'ged'      => $tree->getName(),
                ]);
            } elseif ($ctype === 'user' && Auth::check()) {
                $config_url = route('user-page-block-edit', [
                    'block_id' => $block_id,
                    'ged'      => $tree->getName(),
                ]);
            } else {
                $config_url = '';
            }

            return view('modules/block-template', [
                'block'      => str_replace('_', '-', $this->getName()),
                'id'         => $block_id,
                'config_url' => $config_url,
                'title'      => $title,
                'content'    => $content,
            ]);
        } else {
            return $content;
        }
    }

    /** {@inheritdoc} */
    public function loadAjax(): bool
    {
        return false;
    }

    /** {@inheritdoc} */
    public function isUserBlock(): bool
    {
        return true;
    }

    /** {@inheritdoc} */
    public function isGedcomBlock(): bool
    {
        return true;
    }

    /**
     * Update the configuration for a block.
     *
     * @param Request $request
     * @param int     $block_id
     *
     * @return void
     */
    public function saveBlockConfiguration(Request $request, int $block_id)
    {
        $this->setBlockSetting($block_id, 'num', $request->get('num', self::DEFAULT_NUMBER));
        $this->setBlockSetting($block_id, 'infoStyle', $request->get('infoStyle', self::DEFAULT_STYLE));
    }

    /**
     * An HTML form to edit block settings
     *
     * @param Tree $tree
     * @param int  $block_id
     *
     * @return void
     */
    public function editBlockConfiguration(Tree $tree, int $block_id)
    {
        $num       = $this->getBlockSetting($block_id, 'num', self::DEFAULT_NUMBER);
        $infoStyle = $this->getBlockSetting($block_id, 'infoStyle', self::DEFAULT_STYLE);

        $info_styles = [
            /* I18N: An option in a list-box */
            'list'     => I18N::translate('bullet list'),
            /* I18N: An option in a list-box */
            'array'    => I18N::translate('compact list'),
            /* I18N: An option in a list-box */
            'table'    => I18N::translate('table'),
            /* I18N: An option in a list-box */
            'tagcloud' => I18N::translate('tag cloud'),
        ];

        echo view('modules/top10_surnames/config', [
            'num'         => $num,
            'infoStyle'   => $infoStyle,
            'info_styles' => $info_styles,
        ]);
    }

    /**
     * Sort (lists of counts of similar) surname by total count.
     *
     * @param string[] $a
     * @param string[] $b
     *
     * @return int
     */
    private function surnameCountSort(array $a, array $b): int
    {
        return array_sum($b) - array_sum($a);
    }
}