package models

import (
	"eta/eta_forum_hub/utils"
	"time"

	"github.com/beego/beego/v2/client/orm"
)

type ChartDescription struct {
	Id               int       `gorm:"column:id;primaryKey"`
	Description      string    `gorm:"column:description"`
	ChartInfoId      int       `gorm:"column:chart_info_id"` // 图表id
	SysUserId        int       `gorm:"column:sys_user_id"`     // 创建人id
	SysUserRealName  string    `gorm:"column:sys_user_real_name"` // 创建人姓名
	ModifyTime       time.Time `gorm:"column:modify_time"`     // 变更时间
	CreateTime       time.Time `gorm:"column:create_time"`     // 关系建立时间
}

type ChartDescriptionReq struct {
	Id               int       
	Description      string      // 图表id
	ChartInfoId      int       
	SysUserId        int         // 创建人id
	SysUserRealName  string    	 // 创建人姓名
	AdminName        string   	 // 创建人姓名
	ModifyTime       time.Time 	 // 变更时间
	CreateTime       time.Time 	 // 关系建立时间  
}

// GetChartDescriptionByChartInfoId 根据图表ID获取图表简介
func GetChartDescriptionByChartInfoId(chartInfoId int) (item []*ChartDescription, err error) {
	o := orm.NewOrm()
	sql := `SELECT * FROM chart_description WHERE chart_info_id = ? order by create_time desc, id desc`
	_, err = o.Raw(sql, chartInfoId).QueryRows(&item)
	return
}

// 批量更新
func BatchUpdateChartDescription(chartInfoId int, descriptionList []*ChartDescription) (err error) {
	o := orm.NewOrm()
	// 用事务
	tx, err := o.Begin()
	if err != nil {
		return err
	}
	defer func ()  {
		if err != nil {
			tx.Rollback()
		}else{
			tx.Commit()
		}	
	}()

	
	// 批量更新
	if len(descriptionList) == 0 {
		// 删除所有记录
		sql := `DELETE FROM chart_description WHERE chart_info_id = ?`
		_, err = tx.Raw(sql, chartInfoId).Exec()
		return
	}
	// 删除数组
	deleteIdMap := make(map[int]bool)
	// 查询现有记录
	existingRecords := make(map[int]*ChartDescription)
	var existing []*ChartDescription
	sql := `SELECT * FROM chart_description WHERE chart_info_id = ?`
	_, err = o.Raw(sql, chartInfoId).QueryRows(&existing)
	if err != nil {
		return err
	}
	for _, record := range existing {
		existingRecords[record.Id] = record
		deleteIdMap[record.Id] = true
	}

	// 分离需要更新和插入的记录
	var toInsert []*ChartDescription
	for _, desc := range descriptionList {
		delete(deleteIdMap, desc.Id)
		if _, exists := existingRecords[desc.Id]; exists {
			// 更新
			sql := "UPDATE chart_description SET description = ?, sys_user_id = ?, sys_user_real_name = ?, modify_time = ? WHERE id = ?"
			_, err = tx.Raw(sql, desc.Description, desc.SysUserId, desc.SysUserRealName, desc.ModifyTime, desc.Id).Exec()
			if err != nil {
				return err
			}
		} else {
			toInsert = append(toInsert, desc)
		}
	}

	// 批量插入
	if len(toInsert) > 0 {
		_, err := tx.InsertMulti(len(toInsert), toInsert)
		if err != nil {
			return err
		}
	}
	
	// 删除数组中为true的记录
	deleteIds := make([]int, 0)
	for id, _ := range deleteIdMap {
		deleteIds = append(deleteIds, id)
	}
	if len(deleteIds) > 0 {
		sql := `DELETE FROM chart_description WHERE id IN (`+utils.GetOrmInReplace(len(deleteIds))+`) AND chart_info_id = ?`
		_, err = tx.Raw(sql, deleteIds, chartInfoId).Exec()
	}
	
	return
}