package db

import (
	"context"
	"go_dreamfactory/pb"

	"go_dreamfactory/lego/core"

	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/bson/primitive"
	"go.mongodb.org/mongo-driver/mongo/options"
)

const (
	DB_MailTable core.SqlTable = "mail"
)

type IMail interface {
	Mail_QueryUserMail(uId string) (mail []*pb.DB_MailData, err error)
	Mail_InsertUserMail(mail *pb.DB_MailData) (err error)
	Mail_ReadOneMail(objId string) (mail *pb.DB_MailData, err error)
	Mail_GetMailAttachment(objId string) (itmes []*pb.MailAttachment, err error)
	Mail_GetMailAttachmentState(objId string) bool
	Mail_UpdateMailAttachmentState(objId string) bool
	Mail_DelUserMail(objId string) bool
}

func (this *DB) Mail_QueryUserMail(uId string) (mail []*pb.DB_MailData, err error) {

	if _data, err := this.mgo.Find(DB_MailTable, bson.M{"userid": uId}); err == nil {
		for _data.Next(context.TODO()) {
			temp := &pb.DB_MailData{}
			if err = _data.Decode(temp); err == nil {
				mail = append(mail, temp)
			}
		}
	}
	return
}

// 插入一封新的邮件
func (this *DB) Mail_InsertUserMail(mail *pb.DB_MailData) (err error) {

	mail.ObjId = primitive.NewObjectID().Hex()
	mail.Check = false
	mail.Reward = false

	if len(mail.GetItems()) > 0 {
		mail.Reward = true
	}
	_, err = this.mgo.InsertOne(DB_MailTable, mail)

	return err
}

func (this *DB) Mail_ReadOneMail(objId string) (mail *pb.DB_MailData, err error) {

	err = this.mgo.FindOneAndUpdate(
		DB_MailTable,
		bson.M{"_id": objId},
		bson.M{"$set": bson.M{
			"check": false,
		}},
		options.FindOneAndUpdate().SetUpsert(false).SetReturnDocument(options.After),
	).Decode(mail)

	return mail, err
}

// 查询附件信息
func (this *DB) Mail_GetMailAttachment(objId string) (itmes []*pb.MailAttachment, err error) {

	obj := this.mgo.FindOne(DB_MailTable, bson.M{"_id": objId})
	var nd *pb.DB_MailData
	err = obj.Decode(&nd)
	itmes = nd.GetItems()

	return itmes, err
}

// 查看领取附件状态
func (this *DB) Mail_GetMailAttachmentState(objId string) bool {
	var nd *pb.DB_MailData
	err := this.mgo.FindOne(DB_MailTable, bson.M{"_id": objId}).Decode(nd)
	if err != nil {
		return false
	}
	return nd.Reward && len(nd.GetItems()) > 0
}

// 更新领取附件状态
func (this *DB) Mail_UpdateMailAttachmentState(objId string) bool {
	this.mgo.FindOneAndUpdate(
		DB_MailTable,
		bson.M{"_id": objId},
		bson.M{"$set": bson.M{
			"reward": true,
		}},
		options.FindOneAndUpdate().SetUpsert(false).SetReturnDocument(options.After),
	)

	return true
}

// 删除一封邮件
func (this *DB) Mail_DelUserMail(objId string) bool {
	var obj *pb.DB_MailData
	err := this.mgo.FindOne(DB_MailTable, bson.M{"_id": objId}).Decode(obj)
	if err != nil {
		return false
	}
	this.mgo.DeleteOne(DB_MailTable, bson.M{"_id": objId})

	return true
}