<?php

/**
 * webtrees: online genealogy
 * Copyright (C) 2020 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\Module;

use Fisharebest\Webtrees\Factory;
use Fisharebest\Webtrees\GedcomTag;
use Fisharebest\Webtrees\I18N;
use Fisharebest\Webtrees\Media;
use Fisharebest\Webtrees\Tree;
use Illuminate\Database\Capsule\Manager as DB;
use Illuminate\Database\Query\JoinClause;
use Illuminate\Support\Str;
use Psr\Http\Message\ServerRequestInterface;
use stdClass;

use function app;
use function assert;
use function in_array;
use function str_contains;

/**
 * Class SlideShowModule
 */
class SlideShowModule extends AbstractModule implements ModuleBlockInterface
{
    use ModuleBlockTrait;

    // Show media linked to events or individuals.
    private const LINK_ALL        = 'all';
    private const LINK_EVENT      = 'event';
    private const LINK_INDIVIDUAL = 'indi';

    // How long to show each slide (seconds)
    private const DELAY = 6;

    /**
     * A sentence describing what this module does.
     *
     * @return string
     */
    public function description(): string
    {
        /* I18N: Description of the “Slide show” module */
        return I18N::translate('Random images from the current family tree.');
    }

    /**
     * Generate the HTML content of this block.
     *
     * @param Tree     $tree
     * @param int      $block_id
     * @param string   $context
     * @param string[] $config
     *
     * @return string
     */
    public function getBlock(Tree $tree, int $block_id, string $context, array $config = []): string
    {
        $request       = app(ServerRequestInterface::class);
        $default_start = $this->getBlockSetting($block_id, 'start');
        $filter_links  = $this->getBlockSetting($block_id, 'filter', self::LINK_ALL);
        $controls      = $this->getBlockSetting($block_id, 'controls', '1');
        $start         = (bool) ($request->getQueryParams()['start'] ?? $default_start);

        $filter_types = [
            $this->getBlockSetting($block_id, 'filter_audio', '0') ? 'audio' : null,
            $this->getBlockSetting($block_id, 'filter_book', '1') ? 'book' : null,
            $this->getBlockSetting($block_id, 'filter_card', '1') ? 'card' : null,
            $this->getBlockSetting($block_id, 'filter_certificate', '1') ? 'certificate' : null,
            $this->getBlockSetting($block_id, 'filter_coat', '1') ? 'coat' : null,
            $this->getBlockSetting($block_id, 'filter_document', '1') ? 'document' : null,
            $this->getBlockSetting($block_id, 'filter_electronic', '1') ? 'electronic' : null,
            $this->getBlockSetting($block_id, 'filter_fiche', '1') ? 'fiche' : null,
            $this->getBlockSetting($block_id, 'filter_film', '1') ? 'film' : null,
            $this->getBlockSetting($block_id, 'filter_magazine', '1') ? 'magazine' : null,
            $this->getBlockSetting($block_id, 'filter_manuscript', '1') ? 'manuscript' : null,
            $this->getBlockSetting($block_id, 'filter_map', '1') ? 'map' : null,
            $this->getBlockSetting($block_id, 'filter_newspaper', '1') ? 'newspaper' : null,
            $this->getBlockSetting($block_id, 'filter_other', '1') ? 'other' : null,
            $this->getBlockSetting($block_id, 'filter_painting', '1') ? 'painting' : null,
            $this->getBlockSetting($block_id, 'filter_photo', '1') ? 'photo' : null,
            $this->getBlockSetting($block_id, 'filter_tombstone', '1') ? 'tombstone' : null,
            $this->getBlockSetting($block_id, 'filter_video', '0') ? 'video' : null,
        ];

        $filter_types = array_filter($filter_types);

        // The type "other" includes media without a type.
        if (in_array('other', $filter_types, true)) {
            $filter_types[] = '';
        }

        // We can apply the filters using SQL, but it is more efficient to shuffle in PHP.
        $random_row = DB::table('media')
            ->join('media_file', static function (JoinClause $join): void {
                $join
                    ->on('media_file.m_file', '=', 'media.m_file')
                    ->on('media_file.m_id', '=', 'media.m_id');
            })
            ->where('media.m_file', '=', $tree->id())
            ->whereIn('media_file.multimedia_format', ['jpg', 'jpeg', 'png', 'gif', 'tiff', 'bmp'])
            ->whereIn('media_file.source_media_type', $filter_types)
            ->select('media.*')
            ->get()
            ->shuffle()
            ->first(static function (stdClass $row) use ($filter_links, $tree): bool {
                $media = Factory::media()->make($row->m_id, $tree, $row->m_gedcom);
                assert($media instanceof Media);

                if (!$media->canShow() || $media->firstImageFile() === null) {
                    return false;
                }

                foreach ($media->linkedIndividuals('OBJE') as $individual) {
                    switch ($filter_links) {
                        case self::LINK_ALL:
                            return true;

                        case self::LINK_INDIVIDUAL:
                            return str_contains($individual->gedcom(), "\n1 OBJE @" . $media->xref() . '@');

                        case self::LINK_EVENT:
                            return str_contains($individual->gedcom(), "\n2 OBJE @" . $media->xref() . '@');
                    }
                }

                return false;
            });

        $random_media = null;

        if ($random_row !== null) {
            $random_media = Factory::media()->make($random_row->m_id, $tree, $random_row->m_gedcom);
        }

        if ($random_media instanceof Media) {
            $content = view('modules/random_media/slide-show', [
                'block_id'            => $block_id,
                'delay'               => self::DELAY,
                'media'               => $random_media,
                'media_file'          => $random_media->firstImageFile(),
                'show_controls'       => $controls,
                'start_automatically' => $start,
                'tree'                => $tree,
            ]);
        } else {
            $content = I18N::translate('This family tree has no images to display.');
        }

        if ($context !== self::CONTEXT_EMBED) {
            return view('modules/block-template', [
                'block'      => Str::kebab($this->name()),
                'id'         => $block_id,
                'config_url' => $this->configUrl($tree, $context, $block_id),
                'title'      => $this->title(),
                'content'    => $content,
            ]);
        }

        return $content;
    }

    /**
     * How should this module be identified in the control panel, etc.?
     *
     * @return string
     */
    public function title(): string
    {
        /* I18N: Name of a module */
        return I18N::translate('Slide show');
    }

    /**
     * Should this block load asynchronously using AJAX?
     *
     * Simple blocks are faster in-line, more complex ones can be loaded later.
     *
     * @return bool
     */
    public function loadAjax(): bool
    {
        return true;
    }

    /**
     * Can this block be shown on the user’s home page?
     *
     * @return bool
     */
    public function isUserBlock(): bool
    {
        return true;
    }

    /**
     * Can this block be shown on the tree’s home page?
     *
     * @return bool
     */
    public function isTreeBlock(): bool
    {
        return true;
    }

    /**
     * Update the configuration for a block.
     *
     * @param ServerRequestInterface $request
     * @param int                    $block_id
     *
     * @return void
     */
    public function saveBlockConfiguration(ServerRequestInterface $request, int $block_id): void
    {
        $params = (array) $request->getParsedBody();

        $this->setBlockSetting($block_id, 'filter', $params['filter']);
        $this->setBlockSetting($block_id, 'controls', $params['controls']);
        $this->setBlockSetting($block_id, 'start', $params['start']);
        $this->setBlockSetting($block_id, 'filter_audio', $params['filter_audio'] ?? '');
        $this->setBlockSetting($block_id, 'filter_book', $params['filter_book'] ?? '');
        $this->setBlockSetting($block_id, 'filter_card', $params['filter_card'] ?? '');
        $this->setBlockSetting($block_id, 'filter_certificate', $params['filter_certificate'] ?? '');
        $this->setBlockSetting($block_id, 'filter_coat', $params['filter_coat'] ?? '');
        $this->setBlockSetting($block_id, 'filter_document', $params['filter_document'] ?? '');
        $this->setBlockSetting($block_id, 'filter_electronic', $params['filter_electronic'] ?? '');
        $this->setBlockSetting($block_id, 'filter_fiche', $params['filter_fiche'] ?? '');
        $this->setBlockSetting($block_id, 'filter_film', $params['filter_film'] ?? '');
        $this->setBlockSetting($block_id, 'filter_magazine', $params['filter_magazine'] ?? '');
        $this->setBlockSetting($block_id, 'filter_manuscript', $params['filter_manuscript'] ?? '');
        $this->setBlockSetting($block_id, 'filter_map', $params['filter_map'] ?? '');
        $this->setBlockSetting($block_id, 'filter_newspaper', $params['filter_newspaper'] ?? '');
        $this->setBlockSetting($block_id, 'filter_other', $params['filter_other'] ?? '');
        $this->setBlockSetting($block_id, 'filter_painting', $params['filter_painting'] ?? '');
        $this->setBlockSetting($block_id, 'filter_photo', $params['filter_photo'] ?? '');
        $this->setBlockSetting($block_id, 'filter_tombstone', $params['filter_tombstone'] ?? '');
        $this->setBlockSetting($block_id, 'filter_video', $params['filter_video'] ?? '');
    }

    /**
     * An HTML form to edit block settings
     *
     * @param Tree $tree
     * @param int  $block_id
     *
     * @return string
     */
    public function editBlockConfiguration(Tree $tree, int $block_id): string
    {
        $filter   = $this->getBlockSetting($block_id, 'filter', self::LINK_ALL);
        $controls = $this->getBlockSetting($block_id, 'controls', '1');
        $start    = $this->getBlockSetting($block_id, 'start', '0');

        $filters = [
            'audio'       => $this->getBlockSetting($block_id, 'filter_audio', '0'),
            'book'        => $this->getBlockSetting($block_id, 'filter_book', '1'),
            'card'        => $this->getBlockSetting($block_id, 'filter_card', '1'),
            'certificate' => $this->getBlockSetting($block_id, 'filter_certificate', '1'),
            'coat'        => $this->getBlockSetting($block_id, 'filter_coat', '1'),
            'document'    => $this->getBlockSetting($block_id, 'filter_document', '1'),
            'electronic'  => $this->getBlockSetting($block_id, 'filter_electronic', '1'),
            'fiche'       => $this->getBlockSetting($block_id, 'filter_fiche', '1'),
            'film'        => $this->getBlockSetting($block_id, 'filter_film', '1'),
            'magazine'    => $this->getBlockSetting($block_id, 'filter_magazine', '1'),
            'manuscript'  => $this->getBlockSetting($block_id, 'filter_manuscript', '1'),
            'map'         => $this->getBlockSetting($block_id, 'filter_map', '1'),
            'newspaper'   => $this->getBlockSetting($block_id, 'filter_newspaper', '1'),
            'other'       => $this->getBlockSetting($block_id, 'filter_other', '1'),
            'painting'    => $this->getBlockSetting($block_id, 'filter_painting', '1'),
            'photo'       => $this->getBlockSetting($block_id, 'filter_photo', '1'),
            'tombstone'   => $this->getBlockSetting($block_id, 'filter_tombstone', '1'),
            'video'       => $this->getBlockSetting($block_id, 'filter_video', '0'),
        ];

        $formats = GedcomTag::getFileFormTypes();

        return view('modules/random_media/config', [
            'controls' => $controls,
            'filter'   => $filter,
            'filters'  => $filters,
            'formats'  => $formats,
            'start'    => $start,
        ]);
    }
}