using System;
using System.Collections.Generic;
using System.Linq;
using Telligent.Evolution.Extensibility;
using Telligent.Evolution.Extensibility.Api.Version1;
using Telligent.Evolution.Extensibility.Content.Version1;
using IContent = Telligent.Evolution.Extensibility.Content.Version1.IContent;

namespace Samples.Links
{
    public class LinkItemContentType : IContentType, IMentionableContentType
    {
        IContentStateChanges _contentState = null;

        #region IPlugin Members

        public string Description
        {
            get { return "Items in a Links collection"; }
        }

        public void Initialize()
        {
        
        }

        public string Name
        {
            get { return "Link Items"; }
        }
        
        #endregion

        #region IContentType Members

        public Guid[] ApplicationTypes
        {
            get { return new Guid[] { ContentTypes.LinksApplicationId }; }
        }

        public void AttachChangeEvents(IContentStateChanges stateChanges)
        {
            _contentState = stateChanges;
        }

        public Guid ContentTypeId
        {
            get { return ContentTypes.LinksItemId; }
        }

        public string ContentTypeName
        {
            get { return "Links Item"; }
        }

        public IContent Get(Guid contentId)
        {
            return LinksData.GetLink(contentId);
        }

        #endregion

        #region IMentionableContentType

        public IEnumerable<IContent> GetMentionables(int userId, string queryText, IMentionableFilter filter)
        {
            var links = new List<IContent>();

            var results = LinksData.ListLinks()
                    .Where(r => r.Name.ToLowerInvariant().Contains(queryText.ToLowerInvariant()))
                    .ToList<IContent>();

            foreach (var result in results)
            {
                var content = LinksData.GetLink(result.ContentId);
                if (content != null)
                {
                    links.Add(content);
                }
            }

            return links;
        }

        public string GetMentionPreviewHtml(int userId, Guid contentId)
        {
            try
            {
                var content = LinksData.GetLink(contentId);
                if (content != null)
                {
                    return String.Format("{0} (Link)", content.HtmlName("Web"));
                }

                return "(deleted link)";
            }
            catch (Exception)
            {
                return "(inaccessible link)";
            }
        }

        public string GetMentionViewHtml(int userId, Guid contentId)
        {
            try
            {
                var content = LinksData.GetLink(contentId);
                if (content != null)
                {
                    if (!string.IsNullOrEmpty(content.Url))
                    {
                        return string.Concat("<a href=\"",
                            PublicApi.Html.Encode(content.Url),
                            "\" class=\"internal-link view-application links\" data-linkid=\"",
                            content.ContentId, "\">", content.Name, "</a>");
                    }

                    return content.Name;
                }

                return "(deleted link)";
            }
            catch (Exception)
            {
                return "(inaccessible link)";
            }
        }

        #endregion
    }
}