package central

import (
	"errors"
	"fmt"
	"strconv"

	"github.com/gin-gonic/gin"
	centralapi "github.com/tidbcloud/core-svc/idl/pbgen/proto/central"
	"google.golang.org/genproto/protobuf/field_mask"
	"google.golang.org/protobuf/types/known/emptypb"

	openapiserverlessv1beta1 "github.com/tidbcloud/tidb-management-service/api/spec/tidb_cloud_open_api/serverless/v1beta1"
	"github.com/tidbcloud/tidb-management-service/tempo-wrapper/internal/api/types"
	apiutils "github.com/tidbcloud/tidb-management-service/tempo-wrapper/internal/api/utils"
	"github.com/tidbcloud/tidb-management-service/tempo-wrapper/pkg/grpc"
	coregrpc "github.com/tidbcloud/tidb-management-service/tempo-wrapper/pkg/grpc/core_portal"
	mgmtgrpc "github.com/tidbcloud/tidb-management-service/tempo-wrapper/pkg/grpc/mgmt"
)

func UpdateCluster(ctx *gin.Context) {
	req := &centralapi.ChangeClusterNameReq{}
	err := types.ShouldBindJSON(ctx, req)
	if err != nil {
		types.BadRequestResp(ctx, fmt.Errorf("bind request body failed: %w", err))
		return
	}
	if req.ClusterName == "" {
		types.BadRequestResp(ctx, errors.New("new cluster name is empty"))
		return
	}

	// check org/project id
	orgId, err := strconv.ParseUint(ctx.Param("org_id"), 10, 64)
	if err != nil {
		types.BadRequestResp(ctx, fmt.Errorf("invalid org id: %w", err))
		return
	}
	projectId, err := strconv.ParseUint(ctx.Param("project_id"), 10, 64)
	if err != nil {
		types.BadRequestResp(ctx, fmt.Errorf("invalid project id: %w", err))
		return
	}

	clusterId, err := strconv.ParseUint(ctx.Param("cluster_id"), 10, 64)
	if err != nil {
		types.BadRequestResp(ctx, fmt.Errorf("invalid cluster id: %s, err: %w", ctx.Param("cluster_id"), err))
		return
	}

	// set cluster org and project id
	req.ClusterId = clusterId
	req.OrgId = orgId
	req.ProjectId = projectId

	if ok, err := apiutils.IsNewServerlessCluster(ctx, clusterId, projectId, orgId); err != nil {
		types.InternalErrorResp(ctx, fmt.Errorf("check cluster failed: %w", err))
		return
	} else if ok {
		cluster, err := mgmtgrpc.GetServerlessCluster(grpc.NewContext(ctx), &openapiserverlessv1beta1.GetClusterRequest{
			ClusterId: strconv.FormatUint(clusterId, 10),
			View:      openapiserverlessv1beta1.ClusterView_BASIC,
		})
		if err != nil {
			types.GrpcErrorResp(ctx, err)
			return
		}
		// change display name
		_, err = mgmtgrpc.PartialUpdateServerlessCluster(grpc.NewContext(ctx), &openapiserverlessv1beta1.PartialUpdateClusterRequest{
			Cluster: &openapiserverlessv1beta1.PartialUpdateClusterRequest_PartialUpdateCluster{
				ClusterId:   cluster.ClusterId,
				DisplayName: req.ClusterName,
			},
			UpdateMask: &field_mask.FieldMask{Paths: []string{"display_name"}},
		})
		if err != nil {
			types.GrpcErrorResp(ctx, err)
			return
		}
		types.SuccessResp(ctx, &emptypb.Empty{})
		return
	}

	// core-portal
	resp, err := coregrpc.ChangeClusterName(grpc.NewContext(ctx), req)
	if err != nil {
		types.GrpcErrorResp(ctx, err)
		return
	}

	types.SuccessResp(ctx, resp)
}