using CsQuery;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;

namespace Jackett.Indexers
{
    class SceneAccess : IndexerInterface
    {
        public event Action<IndexerInterface, JToken> OnSaveConfigurationRequested;

        public event Action<IndexerInterface, string, Exception> OnResultParsingError;

        public string DisplayName
        {
            get { return "SceneAccess"; }
        }

        public string DisplayDescription
        {
            get { return "Your gateway to the scene"; }
        }

        public Uri SiteLink
        {
            get { return new Uri(BaseUrl); }
        }

        const string BaseUrl = "https://sceneaccess.eu";
        const string LoginUrl = BaseUrl + "/login";
        const string SearchUrl = BaseUrl + "/{0}?method=1&c{1}=1&search={2}";


        public bool IsConfigured
        {
            get; private set;
        }

        CookieContainer cookies;
        HttpClientHandler handler;
        HttpClient client;
        string cookieHeader;

        public SceneAccess()
        {
            IsConfigured = false;
            cookies = new CookieContainer();
            handler = new HttpClientHandler
            {
                CookieContainer = cookies,
                AllowAutoRedirect = true,
                UseCookies = true,
            };
            client = new HttpClient(handler);
        }

        public Task<ConfigurationData> GetConfigurationForSetup()
        {
            var config = new ConfigurationDataBasicLogin();
            return Task.FromResult<ConfigurationData>(config);
        }

        public async Task ApplyConfiguration(JToken configJson)
        {
            var config = new ConfigurationDataBasicLogin();
            config.LoadValuesFromJson(configJson);

            var pairs = new Dictionary<string, string> {
				{ "username", config.Username.Value },
				{ "password", config.Password.Value },
                { "submit", "come on in" }
			};

            var content = new FormUrlEncodedContent(pairs);

            string responseContent;
            JArray cookieJArray;

            if (Program.IsWindows)
            {
                // If Windows use .net http
                var response = await client.PostAsync(LoginUrl, content);
                responseContent = await response.Content.ReadAsStringAsync();
                cookieJArray = cookies.ToJson(SiteLink);
            }
            else
            {
                // If UNIX system use curl
                var response = await CurlHelper.PostAsync(LoginUrl, pairs);
                responseContent = Encoding.UTF8.GetString(response.Content);
                cookieHeader = response.CookieHeader;
                cookieJArray = new JArray(response.CookiesFlat);
            }

            if (!responseContent.Contains("nav_profile"))
            {
                CQ dom = responseContent;
                var messageEl = dom["#login_box_desc"];
                var errorMessage = messageEl.Text().Trim();
                throw new ExceptionWithConfigData(errorMessage, (ConfigurationData)config);
            }
            else
            {
                var configSaveData = new JObject();
                configSaveData["cookies"] = cookieJArray;

                if (OnSaveConfigurationRequested != null)
                    OnSaveConfigurationRequested(this, configSaveData);

                IsConfigured = true;
            }
        }

        public void LoadFromSavedConfiguration(JToken jsonConfig)
        {
            cookies.FillFromJson(new Uri(BaseUrl), (JArray)jsonConfig["cookies"]);
            cookieHeader = cookies.GetCookieHeader(SiteLink);
            IsConfigured = true;
        }

        public async Task<ReleaseInfo[]> PerformQuery(TorznabQuery query)
        {
            List<ReleaseInfo> releases = new List<ReleaseInfo>();

            foreach (var title in query.ShowTitles ?? new string[] { string.Empty })
            {
                var searchString = title + " " + query.GetEpisodeSearchString(); 
                var searchSection = string.IsNullOrEmpty(query.Episode) ? "archive" : "browse";
                var searchCategory = string.IsNullOrEmpty(query.Episode) ? "26" : "27";
                
                var searchUrl = string.Format(SearchUrl, searchSection, searchCategory, searchString);

                string results;
                if (Program.IsWindows)
                {
                    results = await client.GetStringAsync(searchUrl);
                }
                else
                {
                    var response = await CurlHelper.GetAsync(searchUrl, cookieHeader);
                    results = Encoding.UTF8.GetString(response.Content);
                }

                try
                {
                    CQ dom = results;
                    var rows = dom["#torrents-table > tbody > tr.tt_row"];
                    foreach (var row in rows)
                    {
                        CQ qRow = row.Cq();
                        var release = new ReleaseInfo();

                        release.MinimumRatio = 1;
                        release.MinimumSeedTime = 129600;
                        release.Title = qRow.Find(".ttr_name > a").Text();
                        release.Description = release.Title;
                        release.Guid = new Uri(BaseUrl + "/" + qRow.Find(".ttr_name > a").Attr("href"));
                        release.Comments = release.Guid;
                        release.Link = new Uri(BaseUrl + "/" + qRow.Find(".td_dl > a").Attr("href"));

                        var sizeStr = qRow.Find(".ttr_size").Contents()[0].NodeValue;
                        var sizeParts = sizeStr.Split(' ');
                        release.Size = ReleaseInfo.GetBytes(sizeParts[1], float.Parse(sizeParts[0], NumberStyles.Float | NumberStyles.AllowThousands));

                        var timeStr = qRow.Find(".ttr_added").Text();
                        DateTime time;
                        if (DateTime.TryParseExact(timeStr, "yyyy-MM-ddHH:mm:ss", CultureInfo.InvariantCulture, DateTimeStyles.None, out time))
                        {
                            release.PublishDate = time;
                        }

                        release.Seeders = int.Parse(qRow.Find(".ttr_seeders").Text(), NumberStyles.AllowThousands);
                        release.Peers = int.Parse(qRow.Find(".ttr_leechers").Text(), NumberStyles.AllowThousands) + release.Seeders;

                        releases.Add(release);
                    }
                }
                catch (Exception ex)
                {
                    OnResultParsingError(this, results, ex);
                    throw ex;
                }
            }

            return releases.ToArray();
        }

        public async Task<byte[]> Download(Uri link)
        {
            if (Program.IsWindows)
            {
                return await client.GetByteArrayAsync(link);
            }
            else
            {
                var response = await CurlHelper.GetAsync(link.ToString(), cookieHeader);
                return response.Content;
            }
        }
    }
}