// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System.CommandLine;
using System.CommandLine.Parsing;
using Microsoft.DotNet.Cli.Utils;

namespace Microsoft.DotNet.Cli.Telemetry;

internal class AllowListToSendFirstArgument(HashSet<string> topLevelCommandNameAllowList) : IParseResultLogRule
{
    private HashSet<string> _topLevelCommandNameAllowList { get; } = topLevelCommandNameAllowList;

    public List<TelemetryEntryFormat> AllowList(ParseResult parseResult)
    {
        var result = new List<TelemetryEntryFormat>();
        var topLevelCommandNameFromParse = parseResult.RootCommandResult.Children.FirstOrDefault() switch
        {
            System.CommandLine.Parsing.CommandResult commandResult => commandResult.Command.Name,
            OptionResult optionResult => optionResult.Option.Name,
            ArgumentResult argumentResult => argumentResult.Argument.Name,
            _ => null
        };
        if (topLevelCommandNameFromParse != null)
        {
            if (_topLevelCommandNameAllowList.Contains(topLevelCommandNameFromParse))
            {
                var firstArgument = parseResult.RootCommandResult.Children.FirstOrDefault()?.Tokens
                    .Where(t => t.Type.Equals(TokenType.Argument)).FirstOrDefault()?.Value ?? null;
                if (firstArgument != null)
                {
                    result.Add(new TelemetryEntryFormat(
                        "sublevelparser/command",
                        new Dictionary<string, string?>
                        {
                            {"verb", topLevelCommandNameFromParse},
                            {"argument", firstArgument}
                        }));
                }
            }
        }
        return result;
    }
}