package srv_cointrans

import (
	"context"
	"hkdj-web-server/pub/common/srvdef"
	"hkdj-web-server/pub/models/cointransmod"

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

// GetCoinTrans 分页查询金币交易流水
func GetCoinTrans(ctx context.Context, req *CoinTransReq) (*CoinTransResp, *srvdef.SrvErr) {
	filter := bson.M{}

	if req.UserId != nil && *req.UserId > 0 {
		filter[cointransmod.FN.CoinTrans.UserId] = *req.UserId
	}
	if req.FlowDir != nil {
		filter[cointransmod.FN.CoinTrans.FlowDir] = *req.FlowDir
	}
	if req.TranType != nil {
		filter[cointransmod.FN.CoinTrans.TranType] = *req.TranType
	}

	timeFilter := bson.M{}
	if req.StartTime != nil && *req.StartTime != "" {
		if t, ok := parseTime(*req.StartTime); ok {
			timeFilter["$gte"] = t
		}
	}
	if req.EndTime != nil && *req.EndTime != "" {
		if t, ok := parseTime(*req.EndTime); ok {
			timeFilter["$lte"] = t
		}
	}
	if len(timeFilter) > 0 {
		filter[cointransmod.FN.CoinTrans.CreatedAt] = timeFilter
	}

	total, serr := cointransmod.CountCoinTrans(ctx, filter)
	if serr != nil {
		return nil, serr
	}
	resp := &CoinTransResp{Total: total}
	if total == 0 {
		resp.List = cointransmod.CoinTransList{}
		return resp, nil
	}

	opt := options.Find().
		SetSort(bson.D{{Key: cointransmod.FN.CoinTrans.CreatedAt, Value: -1}}).
		SetSkip((req.PageNum - 1) * req.PageSize).
		SetLimit(req.PageSize)

	list, serr := cointransmod.FindManyCoinTrans(ctx, filter, opt)
	if serr != nil {
		return nil, serr
	}
	resp.List = list
	return resp, nil
}