<?php
    function get_text_results($query, $page)
    {
        global $config;

        $mh = curl_multi_init();
        $query_encoded = urlencode($query);
        $results = array();

        $domain = $config->google_domain;
        $site_language = isset($_COOKIE["google_language_site"]) ? trim(htmlspecialchars($_COOKIE["google_language_site"])) : $config->google_language_site;
        $results_language = isset($_COOKIE["google_language_results"]) ? trim(htmlspecialchars($_COOKIE["google_language_results"])) : $config->google_language_results;
        $number_of_results = isset($_COOKIE["google_number_of_results"]) ? trim(htmlspecialchars($_COOKIE["google_number_of_results"])) : $config->google_number_of_results;

        $url = "https://www.google.$domain/search?q=$query_encoded&start=$page";

        if (3 > strlen($site_language) && 0 < strlen($site_language))
            $url .= "&hl=$site_language";

        if (3 > strlen($results_language) && 0 < strlen($results_language))
            $url .= "&lr=lang_$results_language";

        if (3 > strlen($number_of_results) && 0 < strlen($number_of_results))
            $url .= "&num=$number_of_results";

        if (isset($_COOKIE["safe_search"]))
            $url .= "&safe=medium";

        $google_ch = curl_init($url);
        curl_setopt_array($google_ch, $config->curl_settings);
        curl_multi_add_handle($mh, $google_ch);

        $special_search = $page ? 0 : check_for_special_search($query);
        $special_ch = null;
        $url = null;
        if ($special_search != 0)
        {
            switch ($special_search)
            {
                case 1:
                    $url = "https://cdn.moneyconvert.net/api/latest.json";
                    break;
                case 2:
                    $split_query = explode(" ", $query);
                    $reversed_split_q = array_reverse($split_query);
                    $word_to_define = $reversed_split_q[1];
                    $url = "https://api.dictionaryapi.dev/api/v2/entries/en/$word_to_define";
                    break;
                case 5:
                    $url = "https://wttr.in/@" . $_SERVER["REMOTE_ADDR"] . "?format=j1";
                    break;
                case 6:
                    $url = "https://check.torproject.org/torbulkexitlist";
                    break;
                case 7:
                    $wikipedia_language = isset($_COOKIE["wikipedia_language"]) ? trim(htmlspecialchars($_COOKIE["wikipedia_language"])) : $config->wikipedia_language;
                    $url = "https://$wikipedia_language.wikipedia.org/w/api.php?format=json&action=query&prop=extracts%7Cpageimages&exintro&explaintext&redirects=1&pithumbsize=500&titles=$query_encoded";
                    break;
            }

            if ($url != NULL)
            {
                $special_ch = curl_init($url);
                curl_setopt_array($special_ch, $config->curl_settings);
                curl_multi_add_handle($mh, $special_ch);
            }
        }

        $running = null;
        do {
            curl_multi_exec($mh, $running);
        } while ($running);
        if (curl_getinfo($google_ch)['http_code'] == '302') {
                $instances_json = json_decode(file_get_contents("instances.json"), true);
                $instances = array_map(fn($n) => $n['clearnet'], array_filter($instances_json['instances'], fn($n) => !is_null($n['clearnet'])));
                header("Location: " . $instances[array_rand($instances)] . "search.php?q=$query");
                die();
        }


        if ($special_search != 0)
        {
            $special_result = null;

            switch ($special_search)
            {
                case 1:
                    require "engines/special/currency.php";
                    $special_result = currency_results($query, curl_multi_getcontent($special_ch));
                    break;
                case 2:
                    require "engines/special/definition.php";
                    $special_result = definition_results($query, curl_multi_getcontent($special_ch));
                    break;

                case 3:
                    require "engines/special/ip.php";
                    $special_result = ip_result();
                    break;
                case 4:
                    require "engines/special/user_agent.php";
                    $special_result = user_agent_result();
                    break;
                case 5:
                    require "engines/special/weather.php";
                    $special_result = weather_results(curl_multi_getcontent($special_ch));
                    break;
                case 6:
                    require "engines/special/tor.php";
                    $special_result = tor_result(curl_multi_getcontent($special_ch));
                    break;
                case 7:
                    require "engines/special/wikipedia.php";
                    $special_result = wikipedia_results($query, curl_multi_getcontent($special_ch));
                    break;
            }

            if ($special_result != null)
                array_push($results, $special_result);
        }

        $xpath = get_xpath(curl_multi_getcontent($google_ch));

        foreach($xpath->query("//div[@id='search']//div[contains(@class, 'g')]") as $result)
        {
            $url = $xpath->evaluate(".//div[@class='yuRUbf']//a/@href", $result)[0];

            if ($url == null)
                continue;

            if (!empty($results)) // filter duplicate results, ignore special result
            {
                if (!array_key_exists("special_response", end($results)))
                    if (end($results)["url"] == $url->textContent)
                        continue;
            }

            $url = $url->textContent;

            $url = check_for_privacy_frontend($url);

            $title = $xpath->evaluate(".//h3", $result)[0];
            $description = $xpath->evaluate(".//div[contains(@class, 'VwiC3b')]", $result)[0];

            array_push($results,
                array (
                    "title" => htmlspecialchars($title->textContent),
                    "url" =>  htmlspecialchars($url),
                    "base_url" => htmlspecialchars(get_base_url($url)),
                    "description" =>  $description == null ?
                                      "No description was provided for this site." :
                                      htmlspecialchars($description->textContent)
                )
            );
        }

        return $results;
    }

    function print_text_results($results)
    {
        $special = $results[0];
        if (array_key_exists("special_response", $special))
        {
            $response = $special["special_response"]["response"];
            $source = $special["special_response"]["source"];

            echo "<p class=\"special-result-container\">";
            if (array_key_exists("image", $special["special_response"]))
            {
                $image_url = $special["special_response"]["image"];
                echo "<img src=\"image_proxy.php?url=$image_url\">";
            }
            echo $response;
            if ($source)
                echo "<a href=\"$source\" target=\"_blank\">$source</a>";
            echo "</p>";

            array_shift($results);
        }

        echo "<div class=\"text-result-container\">";

        foreach($results as $result)
        {
            $title = $result["title"];
            $url = $result["url"];
            $base_url = $result["base_url"];
            $description = $result["description"];

            echo "<div class=\"text-result-wrapper\">";
            echo "<a href=\"$url\">";
            echo "$base_url";
            echo "<h2>$title</h2>";
            echo "</a>";
            echo "<span>$description</span>";
            echo "</div>";
        }

        echo "</div>";
    }
?>