Merge pull request #165 from yujiterada/fix-issue-164

Fix #164

internal/provider/resource_meraki_networks_appliance_firewall_l3_firewall_rules.go

@@ -382,8 +382,35 @@ func (r *NetworksApplianceFirewallL3FirewallRulesResource) Update(ctx context.Co
 }
 
 func (r *NetworksApplianceFirewallL3FirewallRulesResource) Delete(ctx context.Context, req resource.DeleteRequest, resp *resource.DeleteResponse) {
-	//missing delete
-	resp.Diagnostics.AddWarning("Error deleting NetworksApplianceFirewallL3FirewallRules", "This resource has no delete method in the meraki lab, the resource was deleted only in terraform.")
+	resp.Diagnostics.AddWarning("Warning deleting NetworksApplianceFirewallL3FirewallRules", "This will delete all layer 3 firewall rules for the specified appliance.")
+
+	var data NetworksApplianceFirewallL3FirewallRulesRs
+
+	// Get current state
+	resp.Diagnostics.Append(req.State.Get(ctx, &data)...)
+	if resp.Diagnostics.HasError() {
+		return
+	}
+
+	// Prepare default configuration
+	defaultConfig := merakigosdk.RequestApplianceUpdateNetworkApplianceFirewallL3FirewallRules{
+		Rules:             &[]merakigosdk.RequestApplianceUpdateNetworkApplianceFirewallL3FirewallRulesRules{},
+		SyslogDefaultRule: nil,
+	}
+
+	// Update with default configuration
+	vvNetworkID := data.NetworkID.ValueString()
+	restyResp, err := r.client.Appliance.UpdateNetworkApplianceFirewallL3FirewallRules(vvNetworkID, &defaultConfig)
+
+	if err != nil || restyResp == nil {
+		resp.Diagnostics.AddError(
+			"Error resetting NetworksApplianceFirewallL3FirewallRules",
+			"Could not reset to default configuration, unexpected error: "+err.Error(),
+		)
+		return
+	}
+
+	// Remove resource from state
 	resp.State.RemoveResource(ctx)
 }