<?php

declare(strict_types=1);

namespace PhpMyAdmin\Controllers\Database\Structure;

use PhpMyAdmin\Config;
use PhpMyAdmin\Controllers\InvocableController;
use PhpMyAdmin\Current;
use PhpMyAdmin\DbTableExists;
use PhpMyAdmin\Favorites\RecentFavoriteTable;
use PhpMyAdmin\Favorites\RecentFavoriteTables;
use PhpMyAdmin\Favorites\TableType;
use PhpMyAdmin\Http\Response;
use PhpMyAdmin\Http\ServerRequest;
use PhpMyAdmin\Identifiers\DatabaseName;
use PhpMyAdmin\Identifiers\TableName;
use PhpMyAdmin\Message;
use PhpMyAdmin\ResponseRenderer;
use PhpMyAdmin\Template;

use function __;
use function count;
use function hash;
use function is_array;
use function json_decode;
use function json_encode;
use function md5;

final readonly class FavoriteTableController implements InvocableController
{
    public function __construct(
        private ResponseRenderer $response,
        private Template $template,
        private DbTableExists $dbTableExists,
        private Config $config,
    ) {
    }

    public function __invoke(ServerRequest $request): Response
    {
        if (Current::$database === '') {
            return $this->response->response();
        }

        if (! $request->isAjax()) {
            return $this->response->response();
        }

        $favoriteInstance = RecentFavoriteTables::getInstance(TableType::Favorite);

        $favoriteTables = json_decode($request->getParsedBodyParamAsString('favoriteTables'), true);
        if (! is_array($favoriteTables)) {
            $favoriteTables = [];
        }

        // Required to keep each user's preferences separate.
        $user = hash('sha1', $this->config->selectedServer['user']);

        $databaseName = DatabaseName::tryFrom($request->getParam('db'));
        if ($databaseName === null || ! $this->dbTableExists->selectDatabase($databaseName)) {
            $this->response->setRequestStatus(false);
            $this->response->addJSON('message', Message::error(__('No databases selected.')));

            return $this->response->response();
        }

        $changes = true;
        /** @var string $favoriteTableName */
        $favoriteTableName = $request->getParam('favorite_table', '');
        $favoriteTable = new RecentFavoriteTable($databaseName, TableName::from($favoriteTableName));
        $alreadyFavorite = $favoriteInstance->contains($favoriteTable);

        if (isset($_REQUEST['remove_favorite'])) {
            if ($alreadyFavorite) {
                // If already in favorite list, remove it.
                $favoriteInstance->remove($favoriteTable);
                $alreadyFavorite = false; // for favorite_anchor template
            }
        } elseif (isset($_REQUEST['add_favorite'])) {
            if (! $alreadyFavorite) {
                $numTables = count($favoriteInstance->getTables());
                if ($numTables == $this->config->settings['NumFavoriteTables']) {
                    $changes = false;
                } else {
                    // Otherwise add to favorite list.
                    $favoriteInstance->add($favoriteTable);
                    $alreadyFavorite = true; // for favorite_anchor template
                }
            }
        }

        $favoriteTables[$user] = $favoriteInstance->getTables();

        $json = [];
        $json['changes'] = $changes;
        if (! $changes) {
            $json['message'] = $this->template->render('components/error_message', [
                'msg' => __('Favorite List is full!'),
            ]);
            $this->response->addJSON($json);

            return $this->response->response();
        }

        // Check if current table is already in favorite list.
        $favoriteParams = [
            'db' => Current::$database,
            'ajax_request' => true,
            'favorite_table' => $favoriteTableName,
            ($alreadyFavorite ? 'remove' : 'add') . '_favorite' => true,
        ];

        $json['user'] = $user;
        $json['favoriteTables'] = json_encode($favoriteTables);
        $json['list'] = $favoriteInstance->getHtmlList();
        $json['anchor'] = $this->template->render('database/structure/favorite_anchor', [
            'table_name_hash' => md5($favoriteTableName),
            'db_table_name_hash' => md5(Current::$database . '.' . $favoriteTableName),
            'fav_params' => $favoriteParams,
            'already_favorite' => $alreadyFavorite,
        ]);

        $this->response->addJSON($json);

        return $this->response->response();
    }
}