// Copyright (C) Stichting Deltares 2025. All rights reserved.
// 
// This file is part of the application DAM - UI.
// 
// DAM - UI is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
// 
// All names, logos, and references to "Deltares" are registered trademarks of
// Stichting Deltares and remain full property of Stichting Deltares at all times.
// All rights reserved.

using System;
using System.Globalization;
using Deltares.Authorization;

namespace Deltares.Dam.Data.License;

/// <summary>
/// License class to checkout and checkin licenses
/// </summary>
public class DamLicense
{
    private static DAuthClient dAuthClient;
    private static string checkedOutFeature;

    /// <summary>
    /// Gets the type of the dam license.
    /// </summary>
    /// <value>
    /// The type of the dam license.
    /// </value>
    public static DamLicenseType DamLicenseType { get; private set; } = DamLicenseType.None;

    /// <summary>
    /// Checks out the license.
    /// </summary>
    /// <param name="feature">The feature.</param>
    /// <param name="version">The version.</param>
    public static void CheckoutLicense(string feature, string version)
    {
        if (feature == null)
        {
            throw new ArgumentNullException(nameof(feature));
        }

        int majorVersion = GetMajorVersionFromVersionString(version);
        var versionString = majorVersion.ToString(CultureInfo.InvariantCulture);
        if (DAuthClient.CheckOut(feature, versionString))
        {
            DamLicenseType = DamLicenseType.LFM;
            checkedOutFeature = feature;
        }
        else
        {
            DamLicenseType = DamLicenseType.None;
            checkedOutFeature = null;
        }
    }

    /// <summary>
    /// Checks in the license.
    /// </summary>
    public static void CheckinLicense()
    {
        if (!String.IsNullOrEmpty(checkedOutFeature))
        {
            DAuthClient.CheckIn(checkedOutFeature);
        }
    }

    private static DAuthClient DAuthClient
    {
        get
        {
            if (dAuthClient != null)
            {
                return dAuthClient;
            }

            dAuthClient = new DAuthClient(false, true);
            return dAuthClient;
        }
    }

    private static int GetMajorVersionFromVersionString(string version)
    {
        var seperator = new[]
        {
            '.'
        };
        string[] versionNumbers = version.Split(seperator);
        int majorVersion;
        int.TryParse(versionNumbers[0], out majorVersion);
        return majorVersion;
    }
}