// (c) Copyright Ascensio System SIA 2010-2022
//
// This program is a free software product.
// You can redistribute it and/or modify it under the terms
// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
// any third-party rights.
//
// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For details, see
// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
//
// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
//
// The  interactive user interfaces in modified source and object code versions of the Program must
// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
//
// Pursuant to Section 7(b) of the License you must retain the original Product logo when
// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
// trademark law for use of our trademarks.
//
// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode

namespace ASC.ElasticSearch.Core;

[Serializable]
public class SearchSettings : ISettings<SearchSettings>
{
    public string Data { get; set; }

    [JsonIgnore]
    public Guid ID => new Guid("{93784AB2-10B5-4C2F-9B36-F2662CCCF316}");
    internal List<SearchSettingsItem> Items
    {
        get
        {
            if (_items != null)
            {
                return _items;
            }

            var parsed = JsonConvert.DeserializeObject<List<SearchSettingsItem>>(Data ?? "");

            return _items = parsed ?? new List<SearchSettingsItem>();
        }
        set
        {
            _items = value;
        }
    }

    private List<SearchSettingsItem> _items;

    public SearchSettings GetDefault()
    {
        return new SearchSettings();
    }

    internal bool IsEnabled(string name)
    {
        var wrapper = Items.FirstOrDefault(r => r.ID == name);

        return wrapper != null && wrapper.Enabled;
    }
}

[Scope]
public class SearchSettingsHelper
{
    internal IEnumerable<IFactoryIndexer> AllItems =>
        _allItems ??= _serviceProvider.GetService<IEnumerable<IFactoryIndexer>>();

    private readonly IConfiguration _configuration;
    private readonly TenantManager _tenantManager;
    private readonly SettingsManager _settingsManager;
    private readonly CoreBaseSettings _coreBaseSettings;
    private readonly ICacheNotify<ReIndexAction> _cacheNotify;
    private readonly IServiceProvider _serviceProvider;
    private IEnumerable<IFactoryIndexer> _allItems;

    public SearchSettingsHelper(
        TenantManager tenantManager,
        SettingsManager settingsManager,
        CoreBaseSettings coreBaseSettings,
        ICacheNotify<ReIndexAction> cacheNotify,
        IServiceProvider serviceProvider,
        IConfiguration configuration)
    {
        _tenantManager = tenantManager;
        _settingsManager = settingsManager;
        _coreBaseSettings = coreBaseSettings;
        _cacheNotify = cacheNotify;
        _serviceProvider = serviceProvider;
        _configuration = configuration;
    }

    public List<SearchSettingsItem> GetAllItems()
    {
        if (!_coreBaseSettings.Standalone)
        {
            return new List<SearchSettingsItem>();
        }

        var settings = _settingsManager.Load<SearchSettings>();

        return AllItems.Select(r => new SearchSettingsItem
        {
            ID = r.IndexName,
            Enabled = settings.IsEnabled(r.IndexName),
            Title = r.SettingsTitle
        }).ToList();
    }

    public void Set(List<SearchSettingsItem> items)
    {
        if (!_coreBaseSettings.Standalone)
        {
            return;
        }

        var settings = _settingsManager.Load<SearchSettings>();

        var settingsItems = settings.Items;
        var toReIndex = settingsItems.Count == 0 ? items.Where(r => r.Enabled).ToList() : items.Where(item => settingsItems.Any(r => r.ID == item.ID && r.Enabled != item.Enabled)).ToList();

        settings.Items = items;
        settings.Data = JsonConvert.SerializeObject(items);
        _settingsManager.Save(settings);

        var action = new ReIndexAction() { Tenant = _tenantManager.GetCurrentTenant().Id };
        action.Names.AddRange(toReIndex.Select(r => r.ID).ToList());

        _cacheNotify.Publish(action, CacheNotifyAction.Any);
    }

    public bool CanIndexByContent<T>(int tenantId) where T : class, ISearchItem
    {
        return CanIndexByContent(typeof(T), tenantId);
    }

    public bool CanIndexByContent(Type t, int tenantId)
    {
        if (!typeof(ISearchItemDocument).IsAssignableFrom(t))
        {
            return false;
        }

        if (Convert.ToBoolean(_configuration["core:search-by-content"] ?? "false"))
        {
            return true;
        }

        if (!_coreBaseSettings.Standalone)
        {
            return true;
        }

        var settings = _settingsManager.LoadForTenant<SearchSettings>(tenantId);

        return settings.IsEnabled(((ISearchItemDocument)_serviceProvider.GetService(t)).IndexName);
    }

    public bool CanSearchByContent<T>() where T : class, ISearchItem
    {
        return CanSearchByContent(typeof(T));
    }

    public bool CanSearchByContent(Type t)
    {
        var tenantId = _tenantManager.GetCurrentTenant().Id;
        if (!CanIndexByContent(t, tenantId))
        {
            return false;
        }

        if (_coreBaseSettings.Standalone)
        {
            return true;
        }

        return _tenantManager.GetTenantQuota(tenantId).ContentSearch;
    }
}

[Serializable]
public class SearchSettingsItem
{
    public string ID { get; set; }
    public bool Enabled { get; set; }
    public string Title { get; set; }
}