using Microsoft.AspNetCore.Mvc.Rendering;
using Nop.Core;
using Nop.Core.Domain.Customers;
using Nop.Core.Domain.Forums;
using Nop.Core.Domain.Media;
using Nop.Core.Domain.Security;
using Nop.Services.Common;
using Nop.Services.Customers;
using Nop.Services.Directory;
using Nop.Services.Forums;
using Nop.Services.Helpers;
using Nop.Services.Html;
using Nop.Services.Localization;
using Nop.Services.Media;
using Nop.Web.Framework.Extensions;
using Nop.Web.Infrastructure;
using Nop.Web.Models.Boards;
using Nop.Web.Models.Common;

namespace Nop.Web.Factories;

/// <summary>
/// Represents the forum model factory
/// </summary>
public partial class ForumModelFactory : IForumModelFactory
{
    #region Fields

    protected readonly CaptchaSettings _captchaSettings;
    protected readonly CustomerSettings _customerSettings;
    protected readonly ForumSettings _forumSettings;
    protected readonly IBBCodeHelper _bbCodeHelper;
    protected readonly ICountryService _countryService;
    protected readonly ICustomerService _customerService;
    protected readonly IDateTimeHelper _dateTimeHelper;
    protected readonly IForumService _forumService;
    protected readonly IGenericAttributeService _genericAttributeService;
    protected readonly ILocalizationService _localizationService;
    protected readonly IPictureService _pictureService;
    protected readonly IWorkContext _workContext;
    protected readonly MediaSettings _mediaSettings;

    #endregion

    #region Ctor

    public ForumModelFactory(CaptchaSettings captchaSettings,
        CustomerSettings customerSettings,
        ForumSettings forumSettings,
        IBBCodeHelper bbCodeHelper,
        ICountryService countryService,
        ICustomerService customerService,
        IDateTimeHelper dateTimeHelper,
        IForumService forumService,
        IGenericAttributeService genericAttributeService,
        ILocalizationService localizationService,
        IPictureService pictureService,
        IWorkContext workContext,
        MediaSettings mediaSettings)
    {
        _captchaSettings = captchaSettings;
        _customerSettings = customerSettings;
        _forumSettings = forumSettings;
        _bbCodeHelper = bbCodeHelper;
        _countryService = countryService;
        _customerService = customerService;
        _dateTimeHelper = dateTimeHelper;
        _forumService = forumService;
        _genericAttributeService = genericAttributeService;
        _localizationService = localizationService;
        _pictureService = pictureService;
        _workContext = workContext;
        _mediaSettings = mediaSettings;
    }

    #endregion

    #region Utilities

    /// <summary>
    /// Get the list of forum topic types
    /// </summary>
    /// <returns>
    /// A task that represents the asynchronous operation
    /// The task result contains the collection of the select list item
    /// </returns>
    protected virtual async Task<IEnumerable<SelectListItem>> ForumTopicTypesListAsync()
    {
        var list = new List<SelectListItem>
        {
            new() {
                Text = await _localizationService.GetResourceAsync("Forum.Normal"),
                Value = ((int)ForumTopicType.Normal).ToString()
            },

            new() {
                Text = await _localizationService.GetResourceAsync("Forum.Sticky"),
                Value = ((int)ForumTopicType.Sticky).ToString()
            },

            new() {
                Text = await _localizationService.GetResourceAsync("Forum.Announcement"),
                Value = ((int)ForumTopicType.Announcement).ToString()
            }
        };

        return list;
    }

    /// <summary>
    /// Get the list of forum groups
    /// </summary>
    /// <returns>
    /// A task that represents the asynchronous operation
    /// The task result contains the collection of the select list item
    /// </returns>
    protected virtual async Task<IEnumerable<SelectListItem>> ForumGroupsForumsListAsync()
    {
        var forumsList = new List<SelectListItem>();
        var separator = "--";
        var forumGroups = await _forumService.GetAllForumGroupsAsync();

        foreach (var fg in forumGroups)
        {
            // Add the forum group with Value of 0 so it won't be used as a target forum
            forumsList.Add(new SelectListItem { Text = fg.Name, Value = "0" });

            var forums = await _forumService.GetAllForumsByGroupIdAsync(fg.Id);
            foreach (var f in forums)
            {
                forumsList.Add(new SelectListItem { Text = $"{separator}{f.Name}", Value = f.Id.ToString() });
            }
        }

        return forumsList;
    }

    #endregion

    #region Methods

    /// <summary>
    /// Prepare the forum group model
    /// </summary>
    /// <param name="forumGroup">Forum group</param>
    /// <returns>
    /// A task that represents the asynchronous operation
    /// The task result contains the forum group model
    /// </returns>
    public virtual async Task<ForumGroupModel> PrepareForumGroupModelAsync(ForumGroup forumGroup)
    {
        ArgumentNullException.ThrowIfNull(forumGroup);

        var forumGroupModel = new ForumGroupModel
        {
            Id = forumGroup.Id,
            Name = forumGroup.Name,
            SeName = await _forumService.GetForumGroupSeNameAsync(forumGroup),
        };
        var forums = await _forumService.GetAllForumsByGroupIdAsync(forumGroup.Id);
        foreach (var forum in forums)
        {
            var forumModel = await PrepareForumRowModelAsync(forum);
            forumGroupModel.Forums.Add(forumModel);
        }

        return forumGroupModel;
    }

    /// <summary>
    /// Prepare the boards index model
    /// </summary>
    /// <returns>
    /// A task that represents the asynchronous operation
    /// The task result contains the boards index model
    /// </returns>
    public virtual async Task<BoardsIndexModel> PrepareBoardsIndexModelAsync()
    {
        var model = new BoardsIndexModel();

        var forumGroups = await _forumService.GetAllForumGroupsAsync();
        foreach (var forumGroup in forumGroups)
        {
            var forumGroupModel = await PrepareForumGroupModelAsync(forumGroup);
            model.ForumGroups.Add(forumGroupModel);
        }
        return model;
    }

    /// <summary>
    /// Prepare the active discussions model
    /// </summary>
    /// <returns>
    /// A task that represents the asynchronous operation
    /// The task result contains the active discussions model
    /// </returns>
    public virtual async Task<ActiveDiscussionsModel> PrepareActiveDiscussionsModelAsync()
    {
        var model = new ActiveDiscussionsModel
        {
            ViewAllLinkEnabled = true,
            ActiveDiscussionsFeedEnabled = _forumSettings.ActiveDiscussionsFeedEnabled,
            PostsPageSize = _forumSettings.PostsPageSize,
            AllowPostVoting = _forumSettings.AllowPostVoting
        };

        var topics = await _forumService.GetActiveTopicsAsync(0, 0, _forumSettings.HomepageActiveDiscussionsTopicCount);
        foreach (var topic in topics)
        {
            var topicModel = await PrepareForumTopicRowModelAsync(topic);
            model.ForumTopics.Add(topicModel);
        }

        return model;
    }

    /// <summary>
    /// Prepare the active discussions model
    /// </summary>
    /// <param name="forumId">Forum identifier</param>
    /// <param name="page">Number of forum topics page</param>
    /// <returns>
    /// A task that represents the asynchronous operation
    /// The task result contains the active discussions model
    /// </returns>
    public virtual async Task<ActiveDiscussionsModel> PrepareActiveDiscussionsModelAsync(int forumId, int page)
    {
        var model = new ActiveDiscussionsModel
        {
            ViewAllLinkEnabled = false,
            ActiveDiscussionsFeedEnabled = _forumSettings.ActiveDiscussionsFeedEnabled,
            PostsPageSize = _forumSettings.PostsPageSize,
            AllowPostVoting = _forumSettings.AllowPostVoting
        };

        var pageSize = _forumSettings.ActiveDiscussionsPageSize > 0 ? _forumSettings.ActiveDiscussionsPageSize : 50;

        var topics = await _forumService.GetActiveTopicsAsync(forumId, (page - 1), pageSize);
        model.TopicPageSize = topics.PageSize;
        model.TopicTotalRecords = topics.TotalCount;
        model.TopicPageIndex = topics.PageIndex;
        foreach (var topic in topics)
        {
            var topicModel = await PrepareForumTopicRowModelAsync(topic);
            model.ForumTopics.Add(topicModel);
        }

        return model;
    }

    /// <summary>
    /// Prepare the forum page model
    /// </summary>
    /// <param name="forum">Forum</param>
    /// <param name="page">Number of forum topics page</param>
    /// <returns>
    /// A task that represents the asynchronous operation
    /// The task result contains the forum page model
    /// </returns>
    public virtual async Task<ForumPageModel> PrepareForumPageModelAsync(Forum forum, int page)
    {
        ArgumentNullException.ThrowIfNull(forum);

        var model = new ForumPageModel
        {
            Id = forum.Id,
            Name = forum.Name,
            SeName = await _forumService.GetForumSeNameAsync(forum),
            Description = forum.Description
        };

        var pageSize = _forumSettings.TopicsPageSize > 0 ? _forumSettings.TopicsPageSize : 10;

        model.AllowPostVoting = _forumSettings.AllowPostVoting;

        //subscription
        var customer = await _workContext.GetCurrentCustomerAsync();
        if (await _forumService.IsCustomerAllowedToSubscribeAsync(customer))
        {
            model.WatchForumText = await _localizationService.GetResourceAsync("Forum.WatchForum");

            var forumSubscription = (await _forumService.GetAllSubscriptionsAsync(customer.Id, forum.Id, 0, 0, 1)).FirstOrDefault();
            if (forumSubscription != null)
            {
                model.WatchForumText = await _localizationService.GetResourceAsync("Forum.UnwatchForum");
            }
        }

        var topics = await _forumService.GetAllTopicsAsync(forum.Id, 0, string.Empty, ForumSearchType.All, 0, (page - 1), pageSize);
        model.TopicPageSize = topics.PageSize;
        model.TopicTotalRecords = topics.TotalCount;
        model.TopicPageIndex = topics.PageIndex;
        foreach (var topic in topics)
        {
            var topicModel = await PrepareForumTopicRowModelAsync(topic);
            model.ForumTopics.Add(topicModel);
        }
        model.IsCustomerAllowedToSubscribe = await _forumService.IsCustomerAllowedToSubscribeAsync(customer);
        model.ForumFeedsEnabled = _forumSettings.ForumFeedsEnabled;
        model.PostsPageSize = _forumSettings.PostsPageSize;
        return model;
    }

    /// <summary>
    /// Prepare the forum topic page model
    /// </summary>
    /// <param name="forumTopic">Forum topic</param>
    /// <param name="page">Number of forum posts page</param>
    /// <returns>
    /// A task that represents the asynchronous operation
    /// The task result contains the forum topic page model
    /// </returns>
    public virtual async Task<ForumTopicPageModel> PrepareForumTopicPageModelAsync(ForumTopic forumTopic, int page)
    {
        ArgumentNullException.ThrowIfNull(forumTopic);

        //load posts
        var posts = await _forumService.GetAllPostsAsync(forumTopic.Id, 0, string.Empty,
            page - 1, _forumSettings.PostsPageSize);

        //prepare model
        var currentCustomer = await _workContext.GetCurrentCustomerAsync();
        var model = new ForumTopicPageModel
        {
            Id = forumTopic.Id,
            Subject = forumTopic.Subject,
            SeName = await _forumService.GetTopicSeNameAsync(forumTopic),

            IsCustomerAllowedToEditTopic = await _forumService.IsCustomerAllowedToEditTopicAsync(currentCustomer, forumTopic),
            IsCustomerAllowedToDeleteTopic = await _forumService.IsCustomerAllowedToDeleteTopicAsync(currentCustomer, forumTopic),
            IsCustomerAllowedToMoveTopic = await _forumService.IsCustomerAllowedToMoveTopicAsync(currentCustomer, forumTopic),
            IsCustomerAllowedToSubscribe = await _forumService.IsCustomerAllowedToSubscribeAsync(currentCustomer)
        };

        if (model.IsCustomerAllowedToSubscribe)
        {
            model.WatchTopicText = await _localizationService.GetResourceAsync("Forum.WatchTopic");

            var forumTopicSubscription = (await _forumService.GetAllSubscriptionsAsync(currentCustomer.Id, 0, forumTopic.Id, 0, 1)).FirstOrDefault();
            if (forumTopicSubscription != null)
            {
                model.WatchTopicText = await _localizationService.GetResourceAsync("Forum.UnwatchTopic");
            }
        }
        model.PostsPageIndex = posts.PageIndex;
        model.PostsPageSize = posts.PageSize;
        model.PostsTotalRecords = posts.TotalCount;
        foreach (var post in posts)
        {
            var customer = await _customerService.GetCustomerByIdAsync(post.CustomerId);

            var customerIsGuest = await _customerService.IsGuestAsync(customer);
            var customerIsModerator = !customerIsGuest && await _customerService.IsForumModeratorAsync(customer);

            var forumPostModel = new ForumPostModel
            {
                Id = post.Id,
                ForumTopicId = post.TopicId,
                ForumTopicSeName = await _forumService.GetTopicSeNameAsync(forumTopic),
                FormattedText = _forumService.FormatPostText(post),
                IsCurrentCustomerAllowedToEditPost = await _forumService.IsCustomerAllowedToEditPostAsync(currentCustomer, post),
                IsCurrentCustomerAllowedToDeletePost = await _forumService.IsCustomerAllowedToDeletePostAsync(currentCustomer, post),
                CustomerId = post.CustomerId,
                AllowViewingProfiles = _customerSettings.AllowViewingProfiles && !customerIsGuest,
                CustomerName = await _customerService.FormatUsernameAsync(customer),
                IsCustomerForumModerator = customerIsModerator,
                ShowCustomersPostCount = _forumSettings.ShowCustomersPostCount,
                ForumPostCount = await _genericAttributeService.GetAttributeAsync<Customer, int>(post.CustomerId, NopCustomerDefaults.ForumPostCountAttribute),
                ShowCustomersJoinDate = _customerSettings.ShowCustomersJoinDate && !customerIsGuest,
                CustomerJoinDate = customer?.CreatedOnUtc ?? DateTime.Now,
                AllowPrivateMessages = _forumSettings.AllowPrivateMessages && !customerIsGuest,
                SignaturesEnabled = _forumSettings.SignaturesEnabled,
                FormattedSignature = _forumService.FormatForumSignatureText(await _genericAttributeService.GetAttributeAsync<Customer, string>(post.CustomerId, NopCustomerDefaults.SignatureAttribute)),
            };
            //created on string
            var languageCode = (await _workContext.GetWorkingLanguageAsync()).LanguageCulture;
            if (_forumSettings.RelativeDateTimeFormattingEnabled)
            {
                var postCreatedAgo = post.CreatedOnUtc.RelativeFormat(languageCode);
                forumPostModel.PostCreatedOnStr = string.Format(await _localizationService.GetResourceAsync("Common.RelativeDateTime.Past"), postCreatedAgo);
            }
            else
                forumPostModel.PostCreatedOnStr =
                    (await _dateTimeHelper.ConvertToUserTimeAsync(post.CreatedOnUtc, DateTimeKind.Utc)).ToString("f");
            //avatar
            if (_customerSettings.AllowCustomersToUploadAvatars)
            {
                forumPostModel.CustomerAvatarUrl = await _pictureService.GetPictureUrlAsync(
                    await _genericAttributeService.GetAttributeAsync<Customer, int>(post.CustomerId, NopCustomerDefaults.AvatarPictureIdAttribute),
                    _mediaSettings.AvatarPictureSize,
                    _customerSettings.DefaultAvatarEnabled,
                    defaultPictureType: PictureType.Avatar);
            }
            //location
            forumPostModel.ShowCustomersLocation = _customerSettings.ShowCustomersLocation && !customerIsGuest;
            if (_customerSettings.ShowCustomersLocation)
            {
                var country = await _countryService.GetCountryByIdAsync(customer.CountryId);
                forumPostModel.CustomerLocation = country != null ? await _localizationService.GetLocalizedAsync(country, x => x.Name) : string.Empty;
            }

            //votes
            if (_forumSettings.AllowPostVoting)
            {
                forumPostModel.AllowPostVoting = true;
                forumPostModel.VoteCount = post.VoteCount;
                var postVote = await _forumService.GetPostVoteAsync(post.Id, currentCustomer);
                if (postVote != null)
                    forumPostModel.VoteIsUp = postVote.IsUp;
            }

            // page number is needed for creating post link in _ForumPost partial view
            forumPostModel.CurrentTopicPage = page;
            model.ForumPostModels.Add(forumPostModel);
        }

        return model;
    }

    /// <summary>
    /// Prepare the topic move model
    /// </summary>
    /// <param name="forumTopic">Forum topic</param>
    /// <returns>
    /// A task that represents the asynchronous operation
    /// The task result contains the topic move model
    /// </returns>
    public virtual async Task<TopicMoveModel> PrepareTopicMoveAsync(ForumTopic forumTopic)
    {
        ArgumentNullException.ThrowIfNull(forumTopic);

        var model = new TopicMoveModel
        {
            ForumList = await ForumGroupsForumsListAsync(),
            Id = forumTopic.Id,
            TopicSeName = await _forumService.GetTopicSeNameAsync(forumTopic),
            ForumSelected = forumTopic.ForumId
        };

        return model;
    }

    /// <summary>
    /// Prepare the forum topic create model
    /// </summary>
    /// <param name="forum">Forum</param>
    /// <param name="model">Edit forum topic model</param>
    /// <returns>A task that represents the asynchronous operation</returns>
    public virtual async Task PrepareTopicCreateModelAsync(Forum forum, EditForumTopicModel model)
    {
        ArgumentNullException.ThrowIfNull(forum);

        ArgumentNullException.ThrowIfNull(model);

        var customer = await _workContext.GetCurrentCustomerAsync();
        model.IsEdit = false;
        model.ForumId = forum.Id;
        model.ForumName = forum.Name;
        model.ForumSeName = await _forumService.GetForumSeNameAsync(forum);
        model.ForumEditor = _forumSettings.ForumEditor;
        model.IsCustomerAllowedToSetTopicPriority = await _forumService.IsCustomerAllowedToSetTopicPriorityAsync(customer);
        model.TopicPriorities = await ForumTopicTypesListAsync();
        model.IsCustomerAllowedToSubscribe = await _forumService.IsCustomerAllowedToSubscribeAsync(customer);
        model.DisplayCaptcha = _captchaSettings.Enabled && _captchaSettings.ShowOnForum;
    }

    /// <summary>
    /// Prepare the forum topic edit model
    /// </summary>
    /// <param name="forumTopic">Forum topic</param>
    /// <param name="model">Edit forum topic model</param>
    /// <param name="excludeProperties">Whether to exclude populating of model properties from the entity</param>
    /// <returns>A task that represents the asynchronous operation</returns>
    public virtual async Task PrepareTopicEditModelAsync(ForumTopic forumTopic, EditForumTopicModel model, bool excludeProperties)
    {
        ArgumentNullException.ThrowIfNull(forumTopic);

        ArgumentNullException.ThrowIfNull(model);

        var forum = await _forumService.GetForumByIdAsync(forumTopic.ForumId) ?? throw new ArgumentException("forum cannot be loaded");

        var customer = await _workContext.GetCurrentCustomerAsync();
        model.IsEdit = true;
        model.Id = forumTopic.Id;
        model.TopicPriorities = await ForumTopicTypesListAsync();
        model.ForumName = forum.Name;
        model.ForumSeName = await _forumService.GetForumSeNameAsync(forum);
        model.ForumId = forum.Id;
        model.ForumEditor = _forumSettings.ForumEditor;
        model.DisplayCaptcha = _captchaSettings.Enabled && _captchaSettings.ShowOnForum;
        model.IsCustomerAllowedToSetTopicPriority = await _forumService.IsCustomerAllowedToSetTopicPriorityAsync(customer);
        model.IsCustomerAllowedToSubscribe = await _forumService.IsCustomerAllowedToSubscribeAsync(customer);

        if (!excludeProperties)
        {
            var firstPost = await _forumService.GetFirstPostAsync(forumTopic);
            model.Text = firstPost.Text;
            model.Subject = forumTopic.Subject;
            model.TopicTypeId = forumTopic.TopicTypeId;
            //subscription            
            if (model.IsCustomerAllowedToSubscribe)
            {
                var forumSubscription = (await _forumService.GetAllSubscriptionsAsync(customer.Id, 0, forumTopic.Id, 0, 1)).FirstOrDefault();
                model.Subscribed = forumSubscription != null;
            }
        }
    }

    /// <summary>
    /// Prepare the forum post create model
    /// </summary>
    /// <param name="forumTopic">Forum topic</param>
    /// <param name="quote">Identifier of the quoted post; pass null to load the empty text</param>
    /// <param name="excludeProperties">Whether to exclude populating of model properties from the entity</param>
    /// <returns>
    /// A task that represents the asynchronous operation
    /// The task result contains the edit forum post model
    /// </returns>
    public virtual async Task<EditForumPostModel> PreparePostCreateModelAsync(ForumTopic forumTopic, int? quote, bool excludeProperties)
    {
        ArgumentNullException.ThrowIfNull(forumTopic);

        var forum = await _forumService.GetForumByIdAsync(forumTopic.ForumId) ?? throw new ArgumentException("forum cannot be loaded");

        var currentCustomer = await _workContext.GetCurrentCustomerAsync();
        var model = new EditForumPostModel
        {
            ForumTopicId = forumTopic.Id,
            IsEdit = false,
            ForumEditor = _forumSettings.ForumEditor,
            ForumName = forum.Name,
            ForumTopicSubject = forumTopic.Subject,
            ForumTopicSeName = await _forumService.GetTopicSeNameAsync(forumTopic),
            IsCustomerAllowedToSubscribe = await _forumService.IsCustomerAllowedToSubscribeAsync(currentCustomer),
            DisplayCaptcha = _captchaSettings.Enabled && _captchaSettings.ShowOnForum
        };

        if (!excludeProperties)
        {
            //subscription            
            if (model.IsCustomerAllowedToSubscribe)
            {
                var forumSubscription = (await _forumService.GetAllSubscriptionsAsync(currentCustomer.Id,
                    0, forumTopic.Id, 0, 1)).FirstOrDefault();
                model.Subscribed = forumSubscription != null;
            }

            // Insert the quoted text
            var text = string.Empty;
            if (quote.HasValue)
            {
                var quotePost = await _forumService.GetPostByIdAsync(quote.Value);

                if (quotePost != null && quotePost.TopicId == forumTopic.Id)
                {
                    var customer = await _customerService.GetCustomerByIdAsync(quotePost.CustomerId);

                    var quotePostText = quotePost.Text;

                    switch (_forumSettings.ForumEditor)
                    {
                        case EditorType.SimpleTextBox:
                            text = $"{await _customerService.FormatUsernameAsync(customer)}:\n{quotePostText}\n";
                            break;
                        case EditorType.BBCodeEditor:
                            text = $"[quote={await _customerService.FormatUsernameAsync(customer)}]{_bbCodeHelper.RemoveQuotes(quotePostText)}[/quote]";
                            break;
                    }
                    model.Text = text;
                }
            }
        }

        return model;
    }

    /// <summary>
    /// Prepare the forum post edit model
    /// </summary>
    /// <param name="forumPost">Forum post</param>
    /// <param name="excludeProperties">Whether to exclude populating of model properties from the entity</param>
    /// <returns>
    /// A task that represents the asynchronous operation
    /// The task result contains the edit forum post model
    /// </returns>
    public virtual async Task<EditForumPostModel> PreparePostEditModelAsync(ForumPost forumPost, bool excludeProperties)
    {
        ArgumentNullException.ThrowIfNull(forumPost);

        var forumTopic = await _forumService.GetTopicByIdAsync(forumPost.TopicId) ?? throw new ArgumentException("forum topic cannot be loaded");

        var forum = await _forumService.GetForumByIdAsync(forumTopic.ForumId) ?? throw new ArgumentException("forum cannot be loaded");

        var customer = await _workContext.GetCurrentCustomerAsync();
        var model = new EditForumPostModel
        {
            Id = forumPost.Id,
            ForumTopicId = forumTopic.Id,
            IsEdit = true,
            ForumEditor = _forumSettings.ForumEditor,
            ForumName = forum.Name,
            ForumTopicSubject = forumTopic.Subject,
            ForumTopicSeName = await _forumService.GetTopicSeNameAsync(forumTopic),
            IsCustomerAllowedToSubscribe = await _forumService.IsCustomerAllowedToSubscribeAsync(customer),
            DisplayCaptcha = _captchaSettings.Enabled && _captchaSettings.ShowOnForum
        };

        if (!excludeProperties)
        {
            model.Text = forumPost.Text;
            //subscription
            if (model.IsCustomerAllowedToSubscribe)
            {
                var forumSubscription = (await _forumService.GetAllSubscriptionsAsync(customer.Id, 0, forumTopic.Id, 0, 1)).FirstOrDefault();
                model.Subscribed = forumSubscription != null;
            }
        }

        return model;
    }

    /// <summary>
    /// Prepare the search model
    /// </summary>
    /// <param name="searchterms">Search terms</param>
    /// <param name="advs">Whether to use the advanced search</param>
    /// <param name="forumId">Forum identifier</param>
    /// <param name="within">String representation of int value of ForumSearchType</param>
    /// <param name="limitDays">Limit by the last number days; 0 to load all topics</param>
    /// <param name="page">Number of items page</param>
    /// <returns>
    /// A task that represents the asynchronous operation
    /// The task result contains the search model
    /// </returns>
    public virtual async Task<SearchModel> PrepareSearchModelAsync(string searchterms, bool? advs, string forumId,
        string within, string limitDays, int page)
    {
        var model = new SearchModel();

        var pageSize = 10;

        // Create the values for the "Limit results to previous" select list
        var limitList = new List<SelectListItem>
        {
            new() {
                Text = await _localizationService.GetResourceAsync("Forum.Search.LimitResultsToPrevious.AllResults"),
                Value = "0"
            },
            new() {
                Text = await _localizationService.GetResourceAsync("Forum.Search.LimitResultsToPrevious.1day"),
                Value = "1"
            },
            new() {
                Text = await _localizationService.GetResourceAsync("Forum.Search.LimitResultsToPrevious.7days"),
                Value = "7"
            },
            new() {
                Text = await _localizationService.GetResourceAsync("Forum.Search.LimitResultsToPrevious.2weeks"),
                Value = "14"
            },
            new() {
                Text = await _localizationService.GetResourceAsync("Forum.Search.LimitResultsToPrevious.1month"),
                Value = "30"
            },
            new() {
                Text = await _localizationService.GetResourceAsync("Forum.Search.LimitResultsToPrevious.3months"),
                Value = "92"
            },
            new() {
                Text = await _localizationService.GetResourceAsync("Forum.Search.LimitResultsToPrevious.6months"),
                Value = "183"
            },
            new() {
                Text = await _localizationService.GetResourceAsync("Forum.Search.LimitResultsToPrevious.1year"),
                Value = "365"
            }
        };
        model.LimitList = limitList;

        // Create the values for the "Search in forum" select list
        var forumsSelectList = new List<SelectListItem>
        {
            new() {
                Text = await _localizationService.GetResourceAsync("Forum.Search.SearchInForum.All"),
                Value = "0",
                Selected = true,
            }
        };

        var separator = "--";
        var forumGroups = await _forumService.GetAllForumGroupsAsync();
        foreach (var fg in forumGroups)
        {
            // Add the forum group with value as '-' so it can't be used as a target forum id
            forumsSelectList.Add(new SelectListItem { Text = fg.Name, Value = "-" });

            var forums = await _forumService.GetAllForumsByGroupIdAsync(fg.Id);
            foreach (var f in forums)
            {
                forumsSelectList.Add(
                    new SelectListItem
                    {
                        Text = $"{separator}{f.Name}",
                        Value = f.Id.ToString()
                    });
            }
        }
        model.ForumList = forumsSelectList;

        // Create the values for "Search within" select list            
        var withinList = new List<SelectListItem>
        {
            new() {
                Value = ((int) ForumSearchType.All).ToString(),
                Text = await _localizationService.GetResourceAsync("Forum.Search.SearchWithin.All")
            },
            new() {
                Value = ((int) ForumSearchType.TopicTitlesOnly).ToString(),
                Text = await _localizationService.GetResourceAsync("Forum.Search.SearchWithin.TopicTitlesOnly")
            },
            new() {
                Value = ((int) ForumSearchType.PostTextOnly).ToString(),
                Text = await _localizationService.GetResourceAsync("Forum.Search.SearchWithin.PostTextOnly")
            }
        };
        model.WithinList = withinList;

        _ = int.TryParse(forumId, out var forumIdSelected);
        model.ForumIdSelected = forumIdSelected;

        _ = int.TryParse(within, out var withinSelected);
        model.WithinSelected = withinSelected;

        _ = int.TryParse(limitDays, out var limitDaysSelected);
        model.LimitDaysSelected = limitDaysSelected;

        var searchTermMinimumLength = _forumSettings.ForumSearchTermMinimumLength;

        model.ShowAdvancedSearch = advs.GetValueOrDefault();
        model.SearchResultsVisible = false;
        model.NoResultsVisisble = false;
        model.PostsPageSize = _forumSettings.PostsPageSize;

        model.AllowPostVoting = _forumSettings.AllowPostVoting;

        try
        {
            if (!string.IsNullOrWhiteSpace(searchterms))
            {
                searchterms = searchterms.Trim();
                model.SearchTerms = searchterms;

                if (searchterms.Length < searchTermMinimumLength)
                {
                    throw new NopException(string.Format(await _localizationService.GetResourceAsync("Forum.SearchTermMinimumLengthIsNCharacters"),
                        searchTermMinimumLength));
                }

                ForumSearchType searchWithin = 0;
                var limitResultsToPrevious = 0;
                if (advs.GetValueOrDefault())
                {
                    searchWithin = (ForumSearchType)withinSelected;
                    limitResultsToPrevious = limitDaysSelected;
                }

                if (_forumSettings.SearchResultsPageSize > 0)
                {
                    pageSize = _forumSettings.SearchResultsPageSize;
                }

                var topics = await _forumService.GetAllTopicsAsync(forumIdSelected, 0, searchterms, searchWithin,
                    limitResultsToPrevious, page - 1, pageSize);
                model.TopicPageSize = topics.PageSize;
                model.TopicTotalRecords = topics.TotalCount;
                model.TopicPageIndex = topics.PageIndex;
                foreach (var topic in topics)
                {
                    var topicModel = await PrepareForumTopicRowModelAsync(topic);
                    model.ForumTopics.Add(topicModel);
                }

                model.SearchResultsVisible = (topics.Any());
                model.NoResultsVisisble = !(model.SearchResultsVisible);

                return model;
            }
            model.SearchResultsVisible = false;
        }
        catch (Exception ex)
        {
            model.Error = ex.Message;
        }

        //some exception raised
        model.TopicPageSize = pageSize;
        model.TopicTotalRecords = 0;
        model.TopicPageIndex = page - 1;

        return model;
    }

    /// <summary>
    /// Prepare the last post model
    /// </summary>
    /// <param name="forumPost">Forum post</param>
    /// <param name="showTopic">Whether to show topic</param>
    /// <returns>
    /// A task that represents the asynchronous operation
    /// The task result contains the last post model
    /// </returns>
    public virtual async Task<LastPostModel> PrepareLastPostModelAsync(ForumPost forumPost, bool showTopic)
    {
        var model = new LastPostModel
        {
            ShowTopic = showTopic
        };

        //do not throw an exception here
        if (forumPost == null)
            return model;

        var topic = await _forumService.GetTopicByIdAsync(forumPost.TopicId);

        if (topic is null)
            return model;

        var customer = await _customerService.GetCustomerByIdAsync(forumPost.CustomerId);

        model.Id = forumPost.Id;
        model.ForumTopicId = topic.Id;
        model.ForumTopicSeName = await _forumService.GetTopicSeNameAsync(topic);
        model.ForumTopicSubject = _forumService.StripTopicSubject(topic);
        model.CustomerId = forumPost.CustomerId;
        model.AllowViewingProfiles = _customerSettings.AllowViewingProfiles && !await _customerService.IsGuestAsync(customer);
        model.CustomerName = await _customerService.FormatUsernameAsync(customer);
        //created on string
        var languageCode = (await _workContext.GetWorkingLanguageAsync()).LanguageCulture;
        if (_forumSettings.RelativeDateTimeFormattingEnabled)
        {
            var postCreatedAgo = forumPost.CreatedOnUtc.RelativeFormat(languageCode);
            model.PostCreatedOnStr = string.Format(await _localizationService.GetResourceAsync("Common.RelativeDateTime.Past"), postCreatedAgo);
        }
        else
            model.PostCreatedOnStr = (await _dateTimeHelper.ConvertToUserTimeAsync(forumPost.CreatedOnUtc, DateTimeKind.Utc)).ToString("f");

        return model;
    }

    /// <summary>
    /// Prepare the forum breadcrumb model
    /// </summary>
    /// <param name="forumGroupId">Forum group identifier; pass null to load nothing</param>
    /// <param name="forumId">Forum identifier; pass null to load breadcrumbs up to forum group</param>
    /// <param name="forumTopicId">Forum topic identifier; pass null to load breadcrumbs up to forum</param>
    /// <returns>
    /// A task that represents the asynchronous operation
    /// The task result contains the forum breadcrumb model
    /// </returns>
    public virtual async Task<ForumBreadcrumbModel> PrepareForumBreadcrumbModelAsync(int? forumGroupId, int? forumId, int? forumTopicId)
    {
        var model = new ForumBreadcrumbModel();

        ForumTopic forumTopic = null;
        if (forumTopicId.HasValue)
        {
            forumTopic = await _forumService.GetTopicByIdAsync(forumTopicId.Value);
            if (forumTopic != null)
            {
                model.ForumTopicId = forumTopic.Id;
                model.ForumTopicSubject = forumTopic.Subject;
                model.ForumTopicSeName = await _forumService.GetTopicSeNameAsync(forumTopic);
            }
        }

        var forum = await _forumService.GetForumByIdAsync(forumTopic != null ? forumTopic.ForumId : (forumId ?? 0));
        if (forum != null)
        {
            model.ForumId = forum.Id;
            model.ForumName = forum.Name;
            model.ForumSeName = await _forumService.GetForumSeNameAsync(forum);
        }

        var forumGroup = await _forumService.GetForumGroupByIdAsync(forum != null ? forum.ForumGroupId : (forumGroupId ?? 0));
        if (forumGroup != null)
        {
            model.ForumGroupId = forumGroup.Id;
            model.ForumGroupName = forumGroup.Name;
            model.ForumGroupSeName = await _forumService.GetForumGroupSeNameAsync(forumGroup);
        }

        return model;
    }

    /// <summary>
    /// Prepare the customer forum subscriptions model
    /// </summary>
    /// <param name="page">Number of items page; pass null to load the first page</param>
    /// <returns>
    /// A task that represents the asynchronous operation
    /// The task result contains the customer forum subscriptions model
    /// </returns>
    public virtual async Task<CustomerForumSubscriptionsModel> PrepareCustomerForumSubscriptionsModelAsync(int? page)
    {
        var pageIndex = 0;
        if (page > 0)
        {
            pageIndex = page.Value - 1;
        }

        var customer = await _workContext.GetCurrentCustomerAsync();

        var pageSize = _forumSettings.ForumSubscriptionsPageSize;

        var list = await _forumService.GetAllSubscriptionsAsync(customer.Id, 0, 0, pageIndex, pageSize);

        var model = new CustomerForumSubscriptionsModel();

        foreach (var forumSubscription in list)
        {
            var forumTopicId = forumSubscription.TopicId;
            var forumId = forumSubscription.ForumId;
            var topicSubscription = false;
            var title = string.Empty;
            var slug = string.Empty;

            if (forumTopicId > 0)
            {
                topicSubscription = true;
                var forumTopic = await _forumService.GetTopicByIdAsync(forumTopicId);
                if (forumTopic != null)
                {
                    title = forumTopic.Subject;
                    slug = await _forumService.GetTopicSeNameAsync(forumTopic);
                }
            }
            else
            {
                var forum = await _forumService.GetForumByIdAsync(forumId);
                if (forum != null)
                {
                    title = forum.Name;
                    slug = await _forumService.GetForumSeNameAsync(forum);
                }
            }

            model.ForumSubscriptions.Add(new CustomerForumSubscriptionsModel.ForumSubscriptionModel
            {
                Id = forumSubscription.Id,
                ForumTopicId = forumTopicId,
                ForumId = forumSubscription.ForumId,
                TopicSubscription = topicSubscription,
                Title = title,
                Slug = slug,
            });
        }

        model.PagerModel = new PagerModel(_localizationService)
        {
            PageSize = list.PageSize,
            TotalRecords = list.TotalCount,
            PageIndex = list.PageIndex,
            ShowTotalSummary = false,
            RouteActionName = "CustomerForumSubscriptions",
            UseRouteLinks = true,
            RouteValues = new ForumSubscriptionsRouteValues { PageNumber = pageIndex }
        };

        return model;
    }

    /// <summary>
    /// Prepare the forum topic row model
    /// </summary>
    /// <param name="topic">Forum topic</param>
    /// <returns>
    /// A task that represents the asynchronous operation
    /// The task result contains the forum topic row model
    /// </returns>
    public virtual async Task<ForumTopicRowModel> PrepareForumTopicRowModelAsync(ForumTopic topic)
    {
        ArgumentNullException.ThrowIfNull(topic);

        var customer = await _customerService.GetCustomerByIdAsync(topic.CustomerId);
        var firstPost = await _forumService.GetFirstPostAsync(topic);

        var topicModel = new ForumTopicRowModel
        {
            Id = topic.Id,
            Subject = topic.Subject,
            SeName = await _forumService.GetTopicSeNameAsync(topic),
            LastPostId = topic.LastPostId,
            NumPosts = topic.NumPosts,
            Views = topic.Views,
            NumReplies = topic.NumPosts > 0 ? topic.NumPosts - 1 : 0,
            ForumTopicType = topic.ForumTopicType,
            CustomerId = topic.CustomerId,
            AllowViewingProfiles = _customerSettings.AllowViewingProfiles && !await _customerService.IsGuestAsync(customer),
            CustomerName = await _customerService.FormatUsernameAsync(customer),
            TotalPostPages = (topic.NumPosts / _forumSettings.PostsPageSize) + 1,
            Votes = firstPost?.VoteCount ?? 0
        };

        return topicModel;
    }

    /// <summary>
    /// Prepare the forum row model
    /// </summary>
    /// <param name="forum">Forum</param>
    /// <returns>
    /// A task that represents the asynchronous operation
    /// The task result contains the forum row model
    /// </returns>
    public virtual async Task<ForumRowModel> PrepareForumRowModelAsync(Forum forum)
    {
        ArgumentNullException.ThrowIfNull(forum);

        var forumModel = new ForumRowModel
        {
            Id = forum.Id,
            Name = forum.Name,
            SeName = await _forumService.GetForumSeNameAsync(forum),
            Description = forum.Description,
            NumTopics = forum.NumTopics,
            NumPosts = forum.NumPosts,
            LastPostId = forum.LastPostId,
        };

        return forumModel;
    }

    #endregion

    #region Nested class

    /// <summary>
    /// record that has only page for route value. Used for (My Account) Forum Subscriptions pagination
    /// </summary>
    public partial record ForumSubscriptionsRouteValues : BaseRouteValues
    {
    }

    /// <summary>
    /// record that has search options for route values. Used for Search result pagination
    /// </summary>
    public partial record ForumSearchRouteValues : BaseRouteValues
    {
        public string Searchterms { get; set; }
        public string Advs { get; set; }
        public string ForumId { get; set; }
        public string Within { get; set; }
        public string LimitDays { get; set; }
    }

    /// <summary>
    /// record that has only page for route value. Used for Active Discussions (forums) pagination
    /// </summary>
    public partial record ForumActiveDiscussionsRouteValues : BaseRouteValues
    {
    }

    #endregion
}