using System.Collections;
using System.ServiceModel.Syndication;
using System.Xml;
using Newsbot.Collector.Database.Repositories;
using Newsbot.Collector.Domain.Consts;
using Newsbot.Collector.Domain.Interfaces;
using Newsbot.Collector.Domain.Models;
using Newsbot.Collector.Domain.Models.Config;
using Newsbot.Collector.Services.HtmlParser;
using Serilog;

namespace Newsbot.Collector.Services.Jobs;

public class CodeProjectWatcherJobOptions
{
    public ConfigSectionConnectionStrings? ConnectionStrings { get; set; }

    //public string ConnectionString { get; set; } = "";
    public bool FeaturePullReleases { get; set; } = false;

    public bool FeaturePullCommits { get; set; } = false;
    //public bool PullIssues { get; set; } = false;
}

public class CodeProjectWatcherJob
{
    private const string JobName = "CodeProjectWatcher";
    private IArticlesRepository _articles;
    private ILogger _logger;
    private IDiscordQueueRepository _queue;
    private ISourcesRepository _source;

    public CodeProjectWatcherJob()
    {
        _articles = new ArticlesTable("");
        _queue = new DiscordQueueTable("");
        _source = new SourcesTable("");
        _logger = JobLogger.GetLogger("", JobName);
    }

    public CodeProjectWatcherJob(CodeProjectWatcherJobOptions options)
    {
        options.ConnectionStrings ??= new ConfigSectionConnectionStrings();
        _articles = new ArticlesTable(options.ConnectionStrings.Database ?? "");
        _queue = new DiscordQueueTable(options.ConnectionStrings.Database ?? "");
        _source = new SourcesTable(options.ConnectionStrings.Database ?? "");
        _logger = JobLogger.GetLogger(options.ConnectionStrings.OpenTelemetry ?? "", JobName);
    }

    public void InitAndExecute(CodeProjectWatcherJobOptions options)
    {
        options.ConnectionStrings ??= new ConfigSectionConnectionStrings();
        _articles = new ArticlesTable(options.ConnectionStrings.Database ?? "");
        _queue = new DiscordQueueTable(options.ConnectionStrings.Database ?? "");
        _source = new SourcesTable(options.ConnectionStrings.Database ?? "");
        _logger = JobLogger.GetLogger(options.ConnectionStrings.OpenTelemetry ?? "", JobName);

        Execute();
    }

    private void Execute()
    {
        var sources = _source.ListByType(SourceTypes.CodeProject);

        // query sources for things to pull
        var items = new List<ArticlesModel>();

        foreach (var source in sources)
        {
            items.AddRange(CheckForReleases(source));
            //items.AddRange(CheckForCommits(source));
        }

        foreach (var item in items)
        {
            _articles.New(item);
            _queue.New(new DiscordQueueModel
            {
                ArticleID = item.ID
            });
        }
    }

    public IEnumerable<ArticlesModel> CheckForReleases(SourceModel source)
    {
        var url = new Uri(source.Url);
        var links = new List<string>
        {
            $"{url.AbsoluteUri}/releases.atom",
            $"{url.AbsoluteUri}/tags.atom" //github converts tags as releases
        };

        foreach (var link in links)
            try
            {
                using var reader = XmlReader.Create(link);
                var client = SyndicationFeed.Load(reader);
                
                return ProcessFeed(client.Items, source, true, false);
                

                //if (link.EndsWith("tags.atom"))
                //{
                //    return ProcessFeed(client.Items, source, false, true, false);
                //}
            }
            catch
            {
                _logger.Debug("{JobName} - Does not respond to {UrlAbsoluteUri}.  Might not have anything", JobName,
                    url.AbsoluteUri);
            }

        return new List<ArticlesModel>();
    }
    
    public IEnumerable<ArticlesModel> CheckForCommits(SourceModel source)
    {
        var url = new Uri(source.Url);
        var links = new List<string>
        {
            $"{url.AbsoluteUri}/commits/main.atom",
            $"{url.AbsoluteUri}/commits/master.atom"
        };

        foreach (var link in links)
            try
            {
                using var reader = XmlReader.Create(link);
                var client = SyndicationFeed.Load(reader);
                
                return ProcessFeed(client.Items, source, false, true);
            }
            catch
            {
                _logger.Debug("{JobName} - Does not respond to {UrlAbsoluteUri}.  Might not have anything", JobName,
                    url.AbsoluteUri);
            }

        return new List<ArticlesModel>();
    }

    private IEnumerable<ArticlesModel> ProcessFeed(IEnumerable<SyndicationItem> feed, SourceModel source,
        bool isRelease, bool isCommit)
    {
        var items = new List<ArticlesModel>();

        foreach (var item in feed)
        {
            var itemUrl = item.Links[0].Uri.AbsoluteUri;
            var exits = _articles.GetByUrl(itemUrl);
            if (exits.ID != Guid.Empty) continue;

            var parser = new HtmlPageReader(new HtmlPageReaderOptions
            {
                Url = itemUrl
            });
            parser.Parse();

            var a = new ArticlesModel
            {
                SourceID = source.ID,
                Tags = source.Tags,
                Title = item.Title.Text,
                URL = itemUrl,
                PubDate = item.LastUpdatedTime.DateTime,
                Thumbnail = parser.Data.Header.Image,
                Description = item.Title.Text,
                AuthorName = item.Authors[0].Name ?? "",
                AuthorImage = item.Authors[0].Uri ?? "",
                CodeIsRelease = isRelease,
                CodeIsCommit = isCommit,
            };
            items.Add(a);
        }

        return items;
    }
}