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// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.

using System.Collections;
using System.Collections.Generic;
using System.Management.Automation.Language;

namespace System.Management.Automation
{
    /// <summary>
    /// Provides argument completion for Scope parameter.
    /// </summary>
    public class ScopeArgumentCompleter : IArgumentCompleter
    {
        private static readonly string[] s_Scopes = new string[] { "Global", "Local", "Script" };

        /// <summary>
        /// Returns completion results for scope parameter.
        /// </summary>
        /// <param name="commandName">The command name.</param>
        /// <param name="parameterName">The parameter name.</param>
        /// <param name="wordToComplete">The word to complete.</param>
        /// <param name="commandAst">The command AST.</param>
        /// <param name="fakeBoundParameters">The fake bound parameters.</param>
        /// <returns>List of completion results.</returns>
        public IEnumerable<CompletionResult> CompleteArgument(
            string commandName,
            string parameterName,
            string wordToComplete,
            CommandAst commandAst,
            IDictionary fakeBoundParameters)
                => CompletionHelpers.GetMatchingResults(
                    wordToComplete,
                    possibleCompletionValues: s_Scopes);
    }
}