// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
using System.CommandLine;
using System.CommandLine.Parsing;
using AzureMcp.Core.Commands;
using AzureMcp.Core.Services.Telemetry;
using AzureMcp.MySql.Commands;
using AzureMcp.MySql.Json;
using AzureMcp.MySql.Options;
using AzureMcp.MySql.Options.Server;
using AzureMcp.MySql.Services;
using Microsoft.Extensions.Logging;
namespace AzureMcp.MySql.Commands.Server;
public sealed class ServerParamGetCommand(ILogger<ServerParamGetCommand> logger) : BaseServerCommand<ServerParamGetOptions>(logger)
{
private const string CommandTitle = "Get MySQL Server Parameter";
private readonly Option<string> _paramOption = MySqlOptionDefinitions.Param;
public override string Name => "param";
public override string Description => "Retrieves the current value of a single server configuration parameter on an Azure Database for MySQL Flexible Server. Use to inspect a setting (e.g. max_connections, wait_timeout, slow_query_log) before changing it.";
public override string Title => CommandTitle;
public override ToolMetadata Metadata => new() { Destructive = false, ReadOnly = true };
protected override void RegisterOptions(Command command)
{
base.RegisterOptions(command);
command.AddOption(_paramOption);
}
protected override ServerParamGetOptions BindOptions(ParseResult parseResult)
{
var options = base.BindOptions(parseResult);
options.Param = parseResult.GetValueForOption(_paramOption);
return options;
}
public override async Task<CommandResponse> ExecuteAsync(CommandContext context, ParseResult parseResult)
{
try
{
var options = BindOptions(parseResult);
if (!Validate(parseResult.CommandResult, context.Response).IsValid)
{
return context.Response;
}
IMySqlService mysqlService = context.GetService<IMySqlService>() ?? throw new InvalidOperationException("MySQL service is not available.");
string paramValue = await mysqlService.GetServerParameterAsync(options.Subscription!, options.ResourceGroup!, options.User!, options.Server!, options.Param!);
context.Response.Results = !string.IsNullOrEmpty(paramValue) ?
ResponseResult.Create(
new ServerParamGetCommandResult(options.Param!, paramValue),
MySqlJsonContext.Default.ServerParamGetCommandResult) :
null;
}
catch (Exception ex)
{
_logger.LogError(ex, "An exception occurred retrieving server parameter.");
HandleException(context, ex);
}
return context.Response;
}
internal record ServerParamGetCommandResult(string Parameter, string Value);
}
