<?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\I18N;
use Fisharebest\Webtrees\Individual;
use Fisharebest\Webtrees\Menu;
use Fisharebest\Webtrees\Tree;
use stdClass;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

/**
 * Class StoriesModule
 */
class StoriesModule extends AbstractModule implements ModuleTabInterface, ModuleConfigInterface, ModuleMenuInterface
{
    /** {@inheritdoc} */
    public function getTitle(): string
    {
        /* I18N: Name of a module */
        return I18N::translate('Stories');
    }

    /** {@inheritdoc} */
    public function getDescription(): string
    {
        /* I18N: Description of the “Stories” module */
        return I18N::translate('Add narrative stories to individuals in the family tree.');
    }

    /**
     * The URL to a page where the user can modify the configuration of this module.
     *
     * @return string
     */
    public function getConfigLink(): string
    {
        return route('module', [
            'module' => $this->getName(),
            'action' => 'Admin',
        ]);
    }

    /** {@inheritdoc} */
    public function defaultTabOrder(): int
    {
        return 55;
    }

    /** {@inheritdoc} */
    public function getTabContent(Individual $individual): string
    {
        return view('modules/stories/tab', [
            'is_admin'   => Auth::isAdmin(),
            'individual' => $individual,
            'stories'    => $this->getStoriesForIndividual($individual),
        ]);
    }

    /** {@inheritdoc} */
    public function hasTabContent(Individual $individual): bool
    {
        return Auth::isManager($individual->getTree()) || !empty($this->getStoriesForIndividual($individual));
    }

    /** {@inheritdoc} */
    public function isGrayedOut(Individual $individual): bool
    {
        return !empty($this->getStoriesForIndividual($individual));
    }

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

    /**
     * @param Individual $individual
     *
     * @return stdClass[]
     */
    private function getStoriesForIndividual(Individual $individual): array
    {
        $block_ids =
            Database::prepare(
                "SELECT block_id" .
                " FROM `##block`" .
                " WHERE module_name = :module_name" .
                " AND xref          = :xref" .
                " AND gedcom_id     = :tree_id"
            )->execute([
                'module_name' => $this->getName(),
                'xref'        => $individual->getXref(),
                'tree_id'     => $individual->getTree()->getTreeId(),
            ])->fetchOneColumn();

        $stories = [];
        foreach ($block_ids as $block_id) {
            // Only show this block for certain languages
            $languages = $this->getBlockSetting($block_id, 'languages', '');
            if ($languages === '' || in_array(WT_LOCALE, explode(',', $languages))) {
                $stories[] = (object)[
                    'block_id'   => $block_id,
                    'title'      => $this->getBlockSetting($block_id, 'title'),
                    'story_body' => $this->getBlockSetting($block_id, 'story_body'),
                ];
            }
        }

        return $stories;
    }

    /**
     * The user can re-order menus. Until they do, they are shown in this order.
     *
     * @return int
     */
    public function defaultMenuOrder(): int
    {
        return 30;
    }

    /**
     * What is the default access level for this module?
     *
     * Some modules are aimed at admins or managers, and are not generally shown to users.
     *
     * @return int
     */
    public function defaultAccessLevel(): int
    {
        return Auth::PRIV_HIDE;
    }

    /**
     * A menu, to be added to the main application menu.
     *
     * @param Tree $tree
     *
     * @return Menu|null
     */
    public function getMenu(Tree $tree)
    {
        $menu = new Menu($this->getTitle(), route('module', [
            'module' => $this->getName(),
            'action' => 'ShowList',
            'ged'    => $tree->getName(),
        ]), 'menu-story');

        return $menu;
    }

    /**
     * @param Tree $tree
     *
     * @return Response
     */
    public function getAdminAction(Tree $tree): Response
    {
        $this->layout = 'layouts/administration';

        $stories = Database::prepare(
            "SELECT block_id, xref, gedcom_id" .
            " FROM `##block` b" .
            " WHERE module_name = :module_name" .
            " AND gedcom_id = :tree_id" .
            " ORDER BY gedcom_id, xref"
        )->execute([
            'tree_id'     => $tree->getTreeId(),
            'module_name' => $this->getName(),
        ])->fetchAll();

        foreach ($stories as $story) {
            $story->individual = Individual::getInstance($story->xref, $tree);
            $story->title      = $this->getBlockSetting($story->block_id, 'title');
            $story->languages  = $this->getBlockSetting($story->block_id, 'languages');
        }

        return $this->viewResponse('modules/stories/config', [
            'stories'    => $stories,
            'title'      => $this->getTitle() . ' — ' . $tree->getTitle(),
            'tree'       => $tree,
            'tree_names' => Tree::getNameList(),
        ]);
    }

    /**
     * @param Request $request
     * @param Tree    $tree
     *
     * @return Response
     */
    public function getAdminEditAction(Request $request, Tree $tree): Response
    {
        $this->layout = 'layouts/administration';

        $block_id = (int)$request->get('block_id');

        if ($block_id === 0) {
            // Creating a new story
            $individual  = Individual::getInstance($request->get('xref', ''), $tree);
            $story_title = '';
            $story_body  = '';
            $languages   = [];

            $title = I18N::translate('Add a story') . ' — ' . e($tree->getTitle());
        } else {
            // Editing an existing story
            $xref = Database::prepare(
                "SELECT xref FROM `##block` WHERE block_id = :block_id"
            )->execute([
                'block_id' => $block_id,
            ])->fetchOne();

            $individual  = Individual::getInstance($xref, $tree);
            $story_title = $this->getBlockSetting($block_id, 'title', '');
            $story_body  = $this->getBlockSetting($block_id, 'story_body', '');
            $languages   = explode(',', $this->getBlockSetting($block_id, 'languages'));

            $title = I18N::translate('Edit the story') . ' — ' . e($tree->getTitle());
        }

        return $this->viewResponse('modules/stories/edit', [
            'block_id'    => $block_id,
            'languages'   => $languages,
            'story_body'  => $story_body,
            'story_title' => $story_title,
            'title'       => $title,
            'tree'        => $tree,
            'individual'  => $individual,
        ]);
    }

    /**
     * @param Request $request
     * @param Tree    $tree
     *
     * @return RedirectResponse
     */
    public function postAdminEditAction(Request $request, Tree $tree): RedirectResponse
    {
        $block_id    = (int)$request->get('block_id');
        $xref        = $request->get('xref', '');
        $story_body  = $request->get('story_body', '');
        $story_title = $request->get('story_title', '');
        $languages   = $request->get('languages', []);

        if ($block_id !== 0) {
            Database::prepare(
                "UPDATE `##block` SET gedcom_id = :tree_id, xref = :xref WHERE block_id = :block_id"
            )->execute([
                'tree_id'  => $tree->getTreeId(),
                'xref'     => $xref,
                'block_id' => $block_id,
            ]);
        } else {
            Database::prepare(
                "INSERT INTO `##block` (gedcom_id, xref, module_name, block_order) VALUES (:tree_id, :xref, 'stories', 0)"
            )->execute([
                'tree_id' => $tree->getTreeId(),
                'xref'    => $xref,
            ]);

            $block_id = Database::getInstance()->lastInsertId();
        }

        $this->setBlockSetting($block_id, 'story_body', $story_body);
        $this->setBlockSetting($block_id, 'title', $story_title);
        $this->setBlockSetting($block_id, 'languages', implode(',', $languages));

        $url = route('module', [
            'module' => 'stories',
            'action' => 'Admin',
            'ged'    => $tree->getName(),
        ]);

        return new RedirectResponse($url);
    }

    /**
     * @param Request $request
     * @param Tree    $tree
     *
     * @return Response
     */
    public function postAdminDeleteAction(Request $request, Tree $tree): Response
    {
        $block_id = (int)$request->get('block_id');

        Database::prepare(
            "DELETE FROM `##block_setting` WHERE block_id = :block_id"
        )->execute([
            'block_id' => $block_id,
        ]);

        Database::prepare(
            "DELETE FROM `##block` WHERE block_id = :block_id"
        )->execute([
            'block_id' => $block_id,
        ]);

        $url = route('module', [
            'module' => 'stories',
            'action' => 'Admin',
            'ged'    => $tree->getName(),
        ]);

        return new RedirectResponse($url);
    }

    /**
     * @param Tree $tree
     *
     * @return Response
     */
    public function getShowListAction(Tree $tree): Response
    {
        $stories = Database::prepare(
            "SELECT block_id, xref" .
            " FROM `##block` b" .
            " WHERE module_name = :module_name" .
            " AND gedcom_id = :tree_id" .
            " ORDER BY xref"
        )->execute([
            'module_name' => $this->getName(),
            'tree_id'     => $tree->getTreeId(),
        ])->fetchAll();

        foreach ($stories as $story) {
            $story->individual = Individual::getInstance($story->xref, $tree);
            $story->title      = $this->getBlockSetting($story->block_id, 'title');
            $story->languages  = $this->getBlockSetting($story->block_id, 'languages');
        }

        // Filter non-existant and private individuals.
        $stories = array_filter($stories, function (stdClass $story): bool {
            return $story->individual !== null && $story->individual->canShow();
        });

        // Filter foreign languages.
        $stories = array_filter($stories, function (stdClass $story): bool {
            return $story->languages === '' || in_array(WT_LOCALE, explode(',', $story->languages));
        });

        return $this->viewResponse('modules/stories/list', [
            'stories' => $stories,
            'title'   => $this->getTitle(),
        ]);
    }
}