// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using System;
using System.Globalization;

namespace Microsoft.CodeAnalysis.MSBuild;

/// <summary>
/// Handles conversions from MSBuild values.
/// </summary>
internal static class Conversions
{
    public static bool ToBool(string? value)
        => value != null
        && (string.Equals(bool.TrueString, value, StringComparison.OrdinalIgnoreCase) ||
            string.Equals("On", value, StringComparison.OrdinalIgnoreCase));

    public static int ToInt(string? value)
    {
        if (value == null)
        {
            return 0;
        }
        else
        {
            if (int.TryParse(value, NumberStyles.Integer, CultureInfo.InvariantCulture, out var result))
            {
                return result;
            }

            return 0;
        }
    }

    public static ulong ToULong(string? value)
    {
        if (value == null)
        {
            return 0;
        }
        else
        {
            if (ulong.TryParse(value, out var result))
            {
                return result;
            }

            return 0;
        }
    }

    public static TEnum? ToEnum<TEnum>(string? value, bool ignoreCase)
        where TEnum : struct
    {
        if (value == null)
        {
            return null;
        }
        else
        {
            return Enum.TryParse<TEnum>(value, ignoreCase, out var result)
                ? result
                : (TEnum?)null;
        }
    }
}