package cointransmod

import (
	"context"
	"fmt"
	"hkdj-web-server/pub/common/log"
	"hkdj-web-server/pub/common/srvdef"
	"hkdj-web-server/pub/mongos"

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

var coll *mongos.Collection

func Init(ctx context.Context) {
	coll = mongos.Shop.Coll(TN.CoinTrans)
	initIndex(ctx)
}

func initIndex(ctx context.Context) {
	indexes := []mongo.IndexModel{
		// 按用户+时间倒序查流水（最常用）
		{Keys: bson.D{
			{Key: FN.CoinTrans.UserId, Value: 1},
			{Key: FN.CoinTrans.CreatedAt, Value: -1},
		}},
		// 按交易类型筛选
		{Keys: bson.D{{Key: FN.CoinTrans.TranType, Value: 1}}},
		// 按订单号查（幂等校验）
		{Keys: bson.D{{Key: FN.CoinTrans.OrderNo, Value: 1}}},
	}
	if _, err := coll.CreateIndex(ctx, indexes); err != nil {
		panic(fmt.Sprintf("(cointransmod:initIndex) Create Index failed! err:%+v:", err))
	}
}

// InsertOneCoinTrans 写入一条流水记录
func InsertOneCoinTrans(ctx context.Context, doc *CoinTrans) *srvdef.SrvErr {
	if _, err := coll.InsertOne(ctx, doc); err != nil {
		log.Error("cointransmod:InsertOneCoinTrans failed", log.Any("doc", doc), log.E(err))
		return srvdef.New(srvdef.ErrDbInsertError, "", "")
	}
	return nil
}

// FindManyCoinTrans 分页查询流水列表
func FindManyCoinTrans(ctx context.Context, filter bson.M, opts ...*options.FindOptions) (CoinTransList, *srvdef.SrvErr) {
	var data CoinTransList
	if err := coll.Find(ctx, &data, filter, opts...); err != nil {
		log.Warn("cointransmod:FindManyCoinTrans failed", log.E(err), log.Any("filter", filter))
		return nil, srvdef.New(srvdef.ErrDbQueryError, "", "")
	}
	return data, nil
}

// CountCoinTrans 统计流水条数
func CountCoinTrans(ctx context.Context, filter bson.M) (int64, *srvdef.SrvErr) {
	count, err := coll.Count(ctx, filter)
	if err != nil {
		log.Warn("cointransmod:CountCoinTrans failed", log.E(err), log.Any("filter", filter))
		return 0, srvdef.New(srvdef.ErrDbQueryError, "", "")
	}
	return count, nil
}

// StatSyncConsumeList 按 ID 游标增量拉取金币消费流水（统计中心）
func StatSyncConsumeList(ctx context.Context, startId int64, size int64) (CoinTransList, error) {
	opt := (&options.FindOptions{}).SetLimit(size).SetSort(bson.D{{Key: FN.CoinTrans.Id, Value: 1}})
	filter := bson.M{
		FN.CoinTrans.Id:      bson.M{"$gt": startId},
		FN.CoinTrans.FlowDir: FlowOut,
	}
	list := CoinTransList{}
	if err := coll.Find(ctx, &list, filter, opt); err != nil {
		return nil, err
	}
	return list, nil
}