package question

import (
	"encoding/json"
	"errors"
	"zhiyuan/models"
	"zhiyuan/pkg/app"
	"zhiyuan/pkg/db"
	"zhiyuan/pkg/utils"
	"zhiyuan/services/form"
)

var Question models.Question

func Add(form form.QuestionAdd) (int64, error) {

	options, err := json.Marshal(form.Options)
	if err != nil {
		return 0, errors.New("invalid json")
	}

	questionMap := map[string]interface{}{
		"`course_id`": form.CourseId,
		"`type`":      form.Type,
		"`content`":   form.Content,
		"`options`":   options,
		"`answer`":    form.Answer,
		"`show`":      form.Show,
	}
	questionID, err := db.InsertOne(Question.TableName(), questionMap)
	if err != nil {
		return 0, nil
	}
	return questionID, nil
}

func EditByID(form form.QuestionAdd, id int) error {
	info, err := GetInfoByID(id, nil, nil)
	if info == nil {
		return errors.New("invalid id")
	}

	options, err := json.Marshal(form.Options)
	if err != nil {
		return errors.New("invalid json")
	}

	questionMap := map[string]interface{}{
		"`course_id`": form.CourseId,
		"`type`":      form.Type,
		"`content`":   form.Content,
		"`options`":   options,
		"`answer`":    form.Answer,
		"`show`":      form.Show,
	}
	_, err = db.Update(Question.TableName(), map[string]interface{}{"id": id}, questionMap)
	return err
}

func DeleteByID(id int) error {
	info, _ := GetInfoByID(id, nil, nil)
	if info == nil {
		return errors.New("invalid id")
	}

	_, err := db.DeleteSoft(Question.TableName(), map[string]interface{}{"id": id})
	return err
}

func Count(where map[string]interface{}) (int64, error) {
	return db.Count(Question.TableName(), where)
}

func CountRaw(where string, param map[string]interface{}) (int64, error) {
	query := "`zy_question` WHERE " + where
	return db.CountRaw(query, param)
}

func GetList(where map[string]interface{}, fields []string, page app.Page, retVal interface{}) ([]*models.Question, error) {
	if page.PageNum > 0 && page.PageSize > 0 {
		where["_limit"] = db.GetOffset(uint(page.PageNum), uint(page.PageSize))
	}
	return Question.GetMulti(where, fields, retVal)
}

func GetQuestionsRaw(where map[string]string, param map[string]interface{}, retVal interface{}) error {
	field := "SELECT `zy_question`.* FROM `zy_question` "
	return db.GetMultiRaw(field, where, param, retVal)
}

func GetOne(where map[string]interface{}, fields []string, retVal interface{}) (*models.Question, error) {
	return Question.GetOne(where, fields, retVal)
}

func GetQuestionOne(where map[string]string, param map[string]interface{}, retVal interface{}) error {
	field := "SELECT `zy_question`.* FROM `zy_question` "
	where["_page_size"] = utils.ToStr(1)
	where["_page_num"] = utils.ToStr(1)
	return db.GetMultiRaw(field, where, param, retVal)
}

func GetQuestionByID(id int, retVal interface{}) error {
	where := map[string]string{
		"where": "`zy_question`.`id` = {{id}}",
	}
	param := map[string]interface{}{"id": id}
	return GetQuestionOne(where, param, retVal)
}

func GetInfoByID(id int, fields []string, retVal interface{}) (*models.Question, error) {
	return GetOne(map[string]interface{}{"id": id}, fields, retVal)
}