Add version checking for solution field in Kibana space resource

Co-authored-by: tobio <[email protected]>

Author: Copilot

internal/kibana/space.go

@@ -6,11 +6,14 @@ import (
 
 	"github.com/disaster37/go-kibana-rest/v8/kbapi"
 	"github.com/elastic/terraform-provider-elasticstack/internal/clients"
+	"github.com/hashicorp/go-version"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/validation"
 )
 
+var SpaceSolutionMinVersion = version.Must(version.NewVersion("8.18.0"))
+
 func ResourceSpace() *schema.Resource {
 	apikeySchema := map[string]*schema.Schema{
 		"id": {
@@ -96,6 +99,18 @@ func resourceSpaceUpsert(ctx context.Context, d *schema.ResourceData, meta inter
 		return diag.FromErr(err)
 	}
 
+	// Check version compatibility for solution field
+	if solution, ok := d.GetOk("solution"); ok && solution.(string) != "" {
+		serverVersion, diags := client.ServerVersion(ctx)
+		if diags.HasError() {
+			return diags
+		}
+
+		if !serverVersion.GreaterThanOrEqual(SpaceSolutionMinVersion) {
+			return diag.Errorf("solution field is not supported in this version of the Elastic Stack. Solution field requires %s or higher", SpaceSolutionMinVersion)
+		}
+	}
+
 	space := kbapi.KibanaSpace{
 		ID:   d.Get("space_id").(string),
 		Name: d.Get("name").(string),