package repository

import (
	"online_code/client"
	"online_code/models/entity"
	"online_code/models/param"
)

type problemService struct{}

func ProblemService() *problemService {
	return &problemService{}
}

// GetList 获取题目列表
func (problemService) GetList(p param.GetProblemList) (records []entity.ProblemBasic, count int64, err error) {
	sel := client.MySQL.Scopes(page(p.Current, p.Size)).Preload("ProblemCategories").Preload("ProblemCategories.CategoryBasic")

	if p.Keyword != "" {
		sel.Where("title LIKE ? OR content like ?", "%"+p.Keyword+"%", "%"+p.Keyword+"%")
	}
	if p.CategoryIdentity != "" {
		sel.Joins("RIGHT JOINN problem_category pc on pc.problem_id = problem.id").
			Where("pc.category_id= (SELECT cb.id FROM category cb WHERE cb.identity = ?)", p.CategoryIdentity)
	}

	err = sel.Order("updated_at DESC").Find(&records).Offset(-1).Limit(-1).Count(&count).Error
	return
}

// GetProblemInfo 获取题目详情
func (problemService) GetProblemInfo(id int) (problem entity.ProblemBasic, err error) {
	err = client.MySQL.Where("id = ?", id).Find(&problem).Error
	return
}