<?php

require_once $_SERVER["DOCUMENT_ROOT"] . "/config.php";
require_once $_SERVER["DOCUMENT_ROOT"] . "/api/JsonResponse.php";
require_once $_SERVER["DOCUMENT_ROOT"] . "/Log.php";
require_once $_SERVER["DOCUMENT_ROOT"] . "/database/Query.php";

//题库题目数上限
$max_count = 10;
$q_result = new QueryQuestion();
//随机抽取问题生成题库
try {
    DbUtil::query("select * from question order by rand() limit 0," . $max_count, $q_result);
} catch (Exception $e) {
    json_res(json_encode(array("status" => false, "msg" => "生成题库出现严重异常"), JSON_UNESCAPED_UNICODE));
    return;
}

if (empty($q_result->getQuestionArray())) {
    json_res(json_encode(array("status" => false, "msg" => "生成题库失败，题库为空，请联系管理员添加题目"), JSON_UNESCAPED_UNICODE));
    return;
} else {
    foreach ($q_result->getQuestionArray() as $querstion_item) {
        if ($querstion_item instanceof Question) {
            $answer_res = new QueryAnswer();
            try {
                DbUtil::query("select * from answer where question_id=? order by rand()", $answer_res, array($querstion_item->getQuestionId()));
            } catch (Exception $e) {
                json_res(json_encode(array("status" => false, "msg" => "生成题库出现严重异常，请联系管理员"), JSON_UNESCAPED_UNICODE));
            }
            if (empty($answer_res->getAnswerArray())) {
                error("无法查询question_id=" . $querstion_item->getQuestionId() . "答案");
                json_res(json_encode(array(["status" => false, "msg" => "生成题库失败，请联系管理员"]), JSON_UNESCAPED_UNICODE));
                return;
            } else {
                $querstion_item->setAnswer($answer_res->getAnswerArray());
                foreach ($answer_res->getAnswerArray() as $answer_item) {
                    if ($answer_item instanceof Answer) {
                        if ($answer_item->getIsTrue() == "1") {
                            $querstion_item->setRightAnswer(array_search($answer_item, $answer_res->getAnswerArray()));
                            break;
                        }
                    } else {
                        error("实体类型不匹配" . var_dump($answer_res[0]));
                        json_res(json_encode(array(["status" => false, "msg" => "生成题库失败，请联系管理员"]), JSON_UNESCAPED_UNICODE));
                        return;
                    }
                }
            }
        } else {
            error("实体类型不匹配" . var_dump($querstion_item));
            json_res(json_encode(array(["status" => false, "msg" => "生成题库失败，请联系管理员"]), JSON_UNESCAPED_UNICODE));
            return;
        }
    }

    json_res(json_encode(array("status" => true, "msg" => "成功创建题库，包含" . count($q_result->getQuestionArray()) . "条题目", "result" => $q_result->getQuestionArray()), JSON_UNESCAPED_UNICODE));
}