package dao

import (
	"errors"
	"gorm.io/gorm"
	"gorm.io/gorm/clause"
	"hepa-calc-api/api/model"
	"hepa-calc-api/api/requests"
	"hepa-calc-api/global"
)

type QuestionDao struct {
}

// GetQuestionById 获取数据-id
func (r *QuestionDao) GetQuestionById(QuestionId int64) (m *model.Question, err error) {
	err = global.Db.First(&m, QuestionId).Error
	if err != nil {
		return nil, err
	}
	return m, nil
}

// GetQuestionPreloadById 获取数据-加载全部关联-id
func (r *QuestionDao) GetQuestionPreloadById(QuestionId int64) (m *model.Question, err error) {
	err = global.Db.Preload(clause.Associations).First(&m, QuestionId).Error
	if err != nil {
		return nil, err
	}
	return m, nil
}

// DeleteQuestion 删除
func (r *QuestionDao) DeleteQuestion(tx *gorm.DB, maps interface{}) error {
	err := tx.Where(maps).Delete(&model.Question{}).Error
	if err != nil {
		return err
	}
	return nil
}

// DeleteQuestionById 删除-id
func (r *QuestionDao) DeleteQuestionById(tx *gorm.DB, QuestionId int64) error {
	if err := tx.Delete(&model.Question{}, QuestionId).Error; err != nil {
		return err
	}
	return nil
}

// EditQuestion 修改
func (r *QuestionDao) EditQuestion(tx *gorm.DB, maps interface{}, data interface{}) error {
	err := tx.Model(&model.Question{}).Where(maps).Updates(data).Error
	if err != nil {
		return err
	}
	return nil
}

// EditQuestionById 修改-id
func (r *QuestionDao) EditQuestionById(tx *gorm.DB, QuestionId int64, data interface{}) error {
	err := tx.Model(&model.Question{}).Where("question_id = ?", QuestionId).Updates(data).Error
	if err != nil {
		return err
	}
	return nil
}

// GetQuestionList 获取列表
func (r *QuestionDao) GetQuestionList(maps interface{}) (m []*model.Question, err error) {
	err = global.Db.Where(maps).Find(&m).Error
	if err != nil {
		return nil, err
	}
	return m, nil
}

// GetQuestionCount 获取数量
func (r *QuestionDao) GetQuestionCount(maps interface{}) (total int64, err error) {
	err = global.Db.Model(&model.Question{}).Where(maps).Count(&total).Error
	if err != nil {
		return 0, err
	}
	return total, nil
}

// GetQuestionListRand 获取列表-随机
func (r *QuestionDao) GetQuestionListRand(maps interface{}, limit int) (m []*model.Question, err error) {
	err = global.Db.Where(maps).Order("rand()").Limit(limit).Find(&m).Error
	if err != nil {
		return nil, err
	}
	return m, nil
}

// AddQuestion 新增
func (r *QuestionDao) AddQuestion(tx *gorm.DB, model *model.Question) (*model.Question, error) {
	if err := tx.Create(model).Error; err != nil {
		return nil, err
	}
	return model, nil
}

// GetQuestion 获取
func (r *QuestionDao) GetQuestion(maps interface{}) (m *model.Question, err error) {
	err = global.Db.Where(maps).First(&m).Error
	if err != nil {
		return nil, err
	}
	return m, nil
}

// GetQuestionOrderLimitList 获取列表-排序、限制数量
func (r *QuestionDao) GetQuestionOrderLimitList(maps interface{}, orderField string, limit int) (m []*model.Question, err error) {
	err = global.Db.Where(maps).Order(orderField).Limit(limit).Find(&m).Error
	if err != nil {
		return nil, err
	}
	return m, nil
}

// GetQuestionPageSearch 获取题目列表-分页
func (r *QuestionDao) GetQuestionPageSearch(req requests.GetQuestionPage, page, pageSize int) (m []*model.Question, total int64, err error) {
	var totalRecords int64

	// 构建查询条件
	query := global.Db.Model(&model.Question{})

	// 是否隐藏
	query = query.Where("is_hide = ?", 0)

	// 问题状态
	query = query.Where("question_status = ?", 1)

	// 主键id
	if req.QuestionId != "" {
		query = query.Where("question_id = ?", req.QuestionId)
	}

	// 标题
	if req.QuestionTitle != "" {
		query = query.Where("question_title LIKE ?", "%"+req.QuestionTitle+"%")
	}

	// 副标题
	if req.QuestionSubtitle != "" {
		query = query.Where("question_subtitle LIKE ?", "%"+req.QuestionSubtitle+"%")
	}

	// 唯一标识
	if req.QuestionIden != "" {
		query = query.Where("question_iden = ?", req.QuestionIden)
	}

	// 问题状态
	if req.QuestionStatus != nil {
		query = query.Where("question_status = ?", req.QuestionStatus)
	}

	// 是否推荐
	if req.IsRecommend != nil {
		query = query.Where("is_recommend = ?", req.IsRecommend)
	}

	// 问题介绍
	if req.QuestionBrief != "" {
		query = query.Where("question_brief LIKE ?", "%"+req.QuestionBrief+"%")
	}

	// 问题解释/科普
	if req.QuestionExplain != "" {
		query = query.Where("question_explain LIKE ?", "%"+req.QuestionExplain+"%")
	}

	// 分类标识
	if req.ClassId != "" {
		baseClassQuery := global.Db.Model(&model.BaseClass{}).
			Select("class_id").
			Where("class_id = ?", req.ClassId)

		questionClassQuery := global.Db.Model(&model.QuestionClass{}).
			Select("question_id").
			Where("class_id IN (?)", baseClassQuery)

		query = query.Where("question_id IN (?)", questionClassQuery)
	}

	// 搜索关键字
	if req.Keyword != "" {
		keyword := "%" + req.Keyword + "%" //

		// 标题
		orQuery := global.Db.Model(&model.Question{}).Or("question_title LIKE ?", keyword)

		// 副标题
		orQuery = orQuery.Or("question_subtitle LIKE ?", keyword)

		// 分类标识
		baseClassSubQuery := global.Db.Model(&model.BaseClass{}).
			Select("class_id").
			Where("class_name LIKE ?", keyword)

		questionClassSubQuery := global.Db.Model(&model.QuestionClass{}).
			Select("question_id").
			Where(gorm.Expr("class_id IN (?)", baseClassSubQuery))

		orQuery = orQuery.Or(gorm.Expr("question_id IN (?)", questionClassSubQuery))

		// 执行组建
		query = query.Where(orQuery)
	}

	// 排序
	if req.Order != nil {
		// 点击次数（点击进入详情页的人次）
		if req.Order.ClickCount != "" {
			if req.Order.ClickCount != "desc" && req.Order.ClickCount != "asc" {
				return nil, 0, errors.New("排序字段错误")
			}

			query = query.Order("click_count " + req.Order.ClickCount)
		}

		// 提交次数（提交个人信息进行了算算的人次）
		if req.Order.SubmitCount != "" {
			if req.Order.SubmitCount != "desc" && req.Order.SubmitCount != "asc" {
				return nil, 0, errors.New("排序字段错误")
			}

			query = query.Order("submit_count " + req.Order.SubmitCount)
		}

		// 支付次数（查看报告的人次）
		if req.Order.PayCount != "" {
			if req.Order.PayCount != "desc" && req.Order.PayCount != "asc" {
				return nil, 0, errors.New("排序字段错误")
			}

			query = query.Order("pay_count " + req.Order.PayCount)
		}

		// 价格（原价）
		if req.Order.Price != "" {
			if req.Order.Price != "desc" && req.Order.Price != "asc" {
				return nil, 0, errors.New("排序字段错误")
			}

			query = query.Order("price " + req.Order.Price)
		}

		// 优惠价格
		if req.Order.DiscountPrice != "" {
			if req.Order.DiscountPrice != "desc" && req.Order.DiscountPrice != "asc" {
				return nil, 0, errors.New("排序字段错误")
			}

			query = query.Order("discount_price " + req.Order.DiscountPrice)
		}

		if req.Order.UpdatedAt != "" {
			if req.Order.UpdatedAt != "desc" && req.Order.UpdatedAt != "asc" {
				return nil, 0, errors.New("排序字段错误")
			}

			query = query.Order("updated_at " + req.Order.UpdatedAt)
		}
	}

	// 排序
	query = query.Order("created_at desc")

	// 查询总数量
	if err := query.Count(&totalRecords).Error; err != nil {
		return nil, 0, err
	}

	err = query.Scopes(model.Paginate(page, pageSize)).Find(&m).Error
	if err != nil {
		return nil, 0, err
	}
	return m, totalRecords, nil
}

// Inc 自增
func (r *QuestionDao) Inc(tx *gorm.DB, questionId int64, field string, numeral int) error {
	err := tx.Model(&model.Question{}).Where("question_id = ?", questionId).UpdateColumn(field, gorm.Expr(field+" + ?", numeral)).Error
	if err != nil {
		return err
	}
	return nil
}

// Dec 自减
func (r *QuestionDao) Dec(tx *gorm.DB, questionId int64, field string, numeral int) error {
	err := tx.Model(&model.Question{}).Where("question_id = ?", questionId).UpdateColumn(field, gorm.Expr(field+" - ?", numeral)).Error
	if err != nil {
		return err
	}
	return nil
}