package logic

import (
	"context"
	"fmt"

	"muyu-apiserver/model"
	"muyu-apiserver/pkg/tenantctx"
	"muyu-apiserver/rpc/inventory/internal/svc"
	"muyu-apiserver/rpc/inventory/pb"

	"github.com/zeromicro/go-zero/core/logx"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"
)

type GetStockGroupLogic struct {
	ctx    context.Context
	svcCtx *svc.ServiceContext
	logx.Logger
}

func NewGetStockGroupLogic(ctx context.Context, svcCtx *svc.ServiceContext) *GetStockGroupLogic {
	return &GetStockGroupLogic{
		ctx:    ctx,
		svcCtx: svcCtx,
		Logger: logx.WithContext(ctx),
	}
}

func (l *GetStockGroupLogic) GetStockGroup(in *pb.StockGroupReq) (*pb.StockGroupResp, error) {
	tenantId := tenantctx.ExtractTenantId(l.ctx)
	var list []model.StockGroupResult
	var err error

	switch in.GroupBy {
	case "color":
		list, err = l.svcCtx.ProductModel.FindGroupByColor(l.ctx, tenantId)
	case "location":
		list, err = l.svcCtx.ProductModel.FindGroupByLocation(l.ctx, tenantId)
	default:
		return nil, status.Errorf(codes.InvalidArgument, "unsupported group_by: %s", in.GroupBy)
	}
	if err != nil {
		return nil, status.Error(codes.Internal, err.Error())
	}

	pbList := make([]*pb.StockGroupItem, 0, len(list))
	for _, item := range list {
		pbList = append(pbList, &pb.StockGroupItem{
			Name:     item.Name,
			Count:    item.Count,
			Quantity: fmt.Sprintf("%.2f", item.Quantity),
		})
	}

	return &pb.StockGroupResp{List: pbList}, nil
}