package article

import (
	"git.echol.cn/loser/lckt/global"
	"git.echol.cn/loser/lckt/model/app"
	"git.echol.cn/loser/lckt/model/article"
	"git.echol.cn/loser/lckt/model/article/request"
	"git.echol.cn/loser/lckt/model/article/vo"
	"go.uber.org/zap"
)

type ArticleService struct{}

func (ArticleService) CreateArticle(req article.Article) (err error) {
	err = global.GVA_DB.Create(&req).Error
	return
}

func (ArticleService) DeleteArticle(ids request.DeleteIds) (err error) {
	err = global.GVA_DB.Delete(&article.Article{}, "id in ?", ids.Ids).Error
	return
}

func (ArticleService) UpdateArticle(req article.Article) (err error) {
	err = global.GVA_DB.Model(&article.Article{}).Where("id = ?", req.ID).Updates(&req).Error
	return
}
func (ArticleService) GetArticle(id string) (article article.Article, err error) {
	err = global.GVA_DB.Where("id = ?", id).First(&article).Error
	return
}

func (ArticleService) GetArticleList(pageInfo request.GetList) (list []article.Article, total int64, err error) {
	limit := pageInfo.PageSize
	offset := pageInfo.PageSize * (pageInfo.Page - 1)
	// 创建db
	db := global.GVA_DB.Model(&article.Article{})
	err = db.Count(&total).Error
	if err != nil {
		return
	}
	err = db.Limit(limit).Offset(offset).Find(&list).Error
	return
}

func (s ArticleService) APPGetArticleList(pageInfo request.GetList) (list []vo.ArticleListVo, total int64, err error) {
	limit := pageInfo.PageSize
	offset := pageInfo.PageSize * (pageInfo.Page - 1)

	db := global.GVA_DB.Model(&article.Article{})
	err = db.Count(&total).Error
	if err != nil {
		return
	}

	if pageInfo.Title != "" {
		db = db.Where("title LIKE ?", "%"+pageInfo.Title+"%")
	}
	if pageInfo.CategoryId != 0 {
		db = db.Where("category_id = ?", pageInfo.CategoryId)
	}
	if pageInfo.TeacherId != 0 {
		db = db.Where("teacher_id = ?", pageInfo.TeacherId)
	}

	if pageInfo.Keyword != "" {
		db = db.Where("title LIKE ? OR article.desc LIKE ? OR teacher_name LIKE ?", "%"+pageInfo.Keyword+"%", "%"+pageInfo.Keyword+"%", "%"+pageInfo.Keyword+"%")
	}

	err = db.Limit(limit).Offset(offset).Omit("teacher_avatar").Order("created_at desc").Find(&list).Error
	for i, a := range list {
		global.GVA_DB.Table("app_user").Select("avatar").Where("id = ?", a.TeacherId).Scan(&list[i].TeacherAvatar)
	}

	return
}

func (s ArticleService) APPGetArticle(id string, userId uint) (article vo.ArticleVo, err error) {
	err = global.GVA_DB.Table("article").Where("id = ?", id).First(&article).Error
	if err != nil {
		global.GVA_LOG.Error("获取文章失败", zap.Error(err))
		return
	}
	article.IsBuy = 1 // 设置为已购买

	global.GVA_DB.Table("app_user").Select("avatar").Where("id = ?", article.TeacherId).Scan(&article.TeacherAvatar)

	// 判断是否免费
	if article.IsFree == 0 {
		// 如果不是免费文章，判断用户是否购买过
		var count int64
		err = global.GVA_DB.Model(&app.Order{}).Where("article_id = ? AND user_id = ?", id, userId).Count(&count).Error
		if err != nil {
			global.GVA_LOG.Error("查询用户购买记录失败", zap.Error(err))
			return
		}
		if count == 0 {
			// 用户没有购买过，隐藏Content
			article.Content = ""
			article.IsBuy = 0 // 设置为未购买
		}
	}

	return
}