using System;
using System.Threading.Tasks;

namespace FeedCenter.Accounts;

internal class GoogleReaderReader(Account account) : IAccountReader
{
    public Task<int> GetProgressSteps(AccountReadInput accountReadInput)
    {
        return Task.FromResult(7);
    }

    public async Task<AccountReadResult> Read(AccountReadInput accountReadInput)
    {
        var checkTime = DateTimeOffset.UtcNow;

        //var apiKey = account.Authenticate ? GetApiKey(account) : string.Empty;

        //var feverClient = new FeverClient.FeverClient(account.Url, apiKey);

        //accountReadInput.IncrementProgress();

        //var feverFeeds = feverClient.GetFeeds().Result.ToList();

        //accountReadInput.IncrementProgress();

        //var allFeverFeedItems = feverClient.GetAllFeedItems().Result.ToList();

        //accountReadInput.IncrementProgress();

        var transaction = accountReadInput.Entities.BeginTransaction();

        //foreach (var feverFeed in feverFeeds)
        //{
        //    var feed = accountReadInput.Entities.Feeds.FirstOrDefault(f => f.RemoteId == feverFeed.Id.ToString() && f.Account.Id == account.Id);

        //    if (feed == null)
        //    {
        //        feed = new Feed
        //        {
        //            Id = Guid.NewGuid(),
        //            RemoteId = feverFeed.Id.ToString(),
        //            Title = feverFeed.Title,
        //            Source = feverFeed.Url,
        //            Link = feverFeed.SiteUrl,
        //            Account = account,
        //            Name = feverFeed.Title,
        //            CategoryId = accountReadInput.Entities.DefaultCategory.Id,
        //            Enabled = true,
        //            CheckInterval = 0,
        //        };

        //        accountReadInput.Entities.Feeds.Add(feed);
        //    }

        //    feed.Name = feverFeed.Title;
        //    feed.Title = feverFeed.Title;
        //    feed.Link = feverFeed.SiteUrl;
        //    feed.Source = feverFeed.Url;
        //    feed.LastReadResult = FeedReadResult.Success;
        //    feed.LastChecked = checkTime;

        //    accountReadInput.IncrementProgress();

        //    var feverFeedItems = allFeverFeedItems
        //        .Where(f => f.FeedId == feverFeed.Id)
        //        .OrderByDescending(fi => fi.CreatedOnTime).ToList();

        //    var sequence = 1;

        //    foreach (var feverFeedItem in feverFeedItems)
        //    {
        //        var feedItem = feed.Items.FirstOrDefault(f => f.RemoteId == feverFeedItem.Id.ToString());

        //        if (feedItem == null)
        //        {
        //            feedItem = new FeedItem
        //            {
        //                Id = Guid.NewGuid(),
        //                RemoteId = feverFeedItem.Id.ToString(),
        //                Title = feverFeedItem.Title,
        //                Link = feverFeedItem.Url,
        //                Description = feverFeedItem.Html,
        //                BeenRead = feverFeedItem.IsRead,
        //                FeedId = feed.Id,
        //                Guid = Guid.NewGuid().ToString(),
        //                Sequence = sequence++,
        //            };

        //            feed.Items.Add(feedItem);
        //        }

        //        feedItem.LastFound = checkTime;
        //        feedItem.BeenRead = feverFeedItem.IsRead;
        //        feedItem.Sequence = sequence++;
        //    }

        //    accountReadInput.IncrementProgress();

        //    var feedItemsNotSeen = feed.Items.Where(fi => fi.LastFound != checkTime).ToList();

        //    foreach (var feedItemNotSeen in feedItemsNotSeen)
        //    {
        //        feed.Items.Remove(feedItemNotSeen);
        //    }
        //}

        accountReadInput.IncrementProgress();

        //var feedsNotSeen = accountReadInput.Entities.Feeds.Where(f => f.Account.Id == account.Id && f.LastChecked != checkTime).ToList();

        //foreach (var feedNotSeen in feedsNotSeen)
        //{
        //    accountReadInput.Entities.Feeds.Remove(feedNotSeen);
        //}

        account.LastChecked = checkTime;

        await transaction.CommitAsync();

        accountReadInput.IncrementProgress();

        return AccountReadResult.Success;
    }

    public Task MarkFeedItemRead(string feedItemId)
    {
        //var apiKey = account.Authenticate ? GetApiKey(account) : string.Empty;

        //var feverClient = new FeverClient.FeverClient(account.Url, apiKey);

        //await feverClient.MarkFeedItemAsRead(int.Parse(feedItemId));

        return Task.CompletedTask;
    }

    public bool SupportsFeedDelete => false;

    public bool SupportsFeedEdit => false;

    //private static string GetApiKey(Account account)
    //{
    //    var input = $"{account.Username}:{account.Password}";
    //    var hash = MD5.HashData(Encoding.UTF8.GetBytes(input));
    //    return BitConverter.ToString(hash).Replace("-", "").ToLowerInvariant();
    //}
}