package mongo

import (
	"context"
	"fmt"

	"github.com/Leufolium/test/dbstruct"
	"github.com/qiniu/qmgo"
)

type UserIdMap struct {
	Seq    int64 `json:"seq" bson:"_id"`         //用户业务id序列号
	UserId int64 `json:"user_id" bson:"user_id"` //映射后用户业务id序列号
}

type Mongo struct {
	clientMix *qmgo.Client
}

func NewMongo() (mongo *Mongo, err error) {
	mongo = new(Mongo)

	mongo.clientMix, err = NewMongoClient()
	if err != nil {
		fmt.Printf("NewMongoClient fail, cfg: %v, err: %v", nil, err)
		return
	}

	return
}

const (
	DBUserIdSeq  = "user_id_seq"
	COLUserIdSeq = "user_id_seq"
	COLUserIdMap = "user_id_map"

	DBAccountIdSeq  = "account_id_seq"
	COLAccountIdSeq = "account_id_seq"

	DBAccount  = "account"
	COLAccount = "account"

	DBLogin  = "login"
	COLLogin = "login"
)

func (m *Mongo) getColUserIdSeq() *qmgo.Collection {
	return m.clientMix.Database(DBUserIdSeq).Collection(COLUserIdSeq)
}

func (m *Mongo) getColUserIdMap() *qmgo.Collection {
	return m.clientMix.Database(DBUserIdSeq).Collection(COLUserIdMap)
}

// Account表
func (m *Mongo) getColAccount() *qmgo.Collection {
	return m.clientMix.Database(DBAccount).Collection(COLAccount)
}

// 登录表
func (m *Mongo) getColLogin() *qmgo.Collection {
	return m.clientMix.Database(DBLogin).Collection(COLLogin)
}

// AccountIdSeq序列表
func (m *Mongo) getColAccountIdSeq() *qmgo.Collection {
	return m.clientMix.Database(DBAccountIdSeq).Collection(COLAccountIdSeq)
}

func (m *Mongo) CreateBatch(ctx context.Context, userIdSeqs []*UserIdMap) error {
	col := m.getColUserIdMap()
	_, err := col.InsertMany(ctx, userIdSeqs)
	return err
}

// account相关
func (m *Mongo) CreateAccount(ctx context.Context, account *dbstruct.Account) error {
	col := m.getColAccount()
	_, err := col.InsertOne(ctx, account)
	return err
}

func (m *Mongo) CreateLogin(ctx context.Context, login *dbstruct.Login) error {
	col := m.getColLogin()
	_, err := col.InsertOne(ctx, login)
	return err
}

func (m *Mongo) GetAndUpdateAccountIdSeq(ctx context.Context) (accountIdSeq *dbstruct.AccountIdSeq, err error) {
	col := m.getColAccountIdSeq()

	change := qmgo.Change{
		Update:    qmgo.M{"$inc": qmgo.M{"seq": 1}},
		Upsert:    true,
		ReturnNew: false,
	}

	accountIdSeqInstance := dbstruct.AccountIdSeq{}
	if err = col.Find(ctx, qmgo.M{"_id": "account_id_seq_id"}).Apply(change, &accountIdSeqInstance); err != nil {
		fmt.Printf("change error : %v", err)
		return
	}

	return &accountIdSeqInstance, err
}

func (m *Mongo) GetAndUpdateUserIdSeq(ctx context.Context) (userIdSeq *dbstruct.UserIdSeq, err error) {
	col := m.getColUserIdSeq()

	change := qmgo.Change{
		Update:    qmgo.M{"$inc": qmgo.M{"seq": 1}},
		Upsert:    true,
		ReturnNew: false,
	}

	userIdSeqInstance := dbstruct.UserIdSeq{}
	if err = col.Find(ctx, qmgo.M{"_id": "user_id_seq_id"}).Apply(change, &userIdSeqInstance); err != nil {
		fmt.Printf("change error : %v", err)
		return
	}

	return &userIdSeqInstance, err
}

func (m *Mongo) GetMappedUserId(ctx context.Context, userIdSeq int64) (*dbstruct.UserIdMap, error) {
	userIdMap := &dbstruct.UserIdMap{}
	col := m.getColUserIdMap()
	query := qmgo.M{
		"_id": userIdSeq,
	}
	err := col.Find(ctx, query).One(&userIdMap)
	return userIdMap, err
}