using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Web;
using Microsoft.AspNetCore.Mvc;
using Shared;
using Shared.Engine;
using Shared.Models.Online.Settings;
using Shared.Models.Templates;
using LME.StarLight.Models;

namespace LME.StarLight.Controllers
{
    public class Controller : BaseOnlineController
    {
        ProxyManager proxyManager;

        public Controller() : base(ModInit.Settings)
        {
            proxyManager = new ProxyManager(ModInit.StarLight);
        }

        [HttpGet]
        [Route("lite/lme_starlight")]
        async public Task<ActionResult> Index(long id, string imdb_id, long kinopoisk_id, string title, string original_title, string original_language, int year, string source, int serial, string account_email, int s = -1, bool rjson = false, string href = null, bool checksearch = false)
        {
            await UpdateService.ConnectAsync(host);

            var init = loadKit(ModInit.StarLight);
            if (!init.enable)
                return Forbid();

            var invoke = new StarLightInvoke(init, hybridCache, OnLog, proxyManager, httpHydra);

            if (checksearch)
            {
                if (!IsCheckOnlineSearchEnabled())
                    return OnError("lme_starlight", refresh_proxy: true);

                var searchResults = await invoke.Search(title, original_title);
                if (searchResults != null && searchResults.Count > 0)
                    return Content("data-json=", "text/plain; charset=utf-8");

                return OnError("lme_starlight", refresh_proxy: true);
            }

            string itemUrl = href;
            if (string.IsNullOrEmpty(itemUrl))
            {
                var searchResults = await invoke.Search(title, original_title);
                if (searchResults == null || searchResults.Count == 0)
                    return OnError("lme_starlight", refresh_proxy: true);

                if (searchResults.Count > 1)
                {
                    var similar_tpl = new SimilarTpl(searchResults.Count);
                    foreach (var res in searchResults)
                    {
                        string link = $"{host}/lite/lme_starlight?imdb_id={imdb_id}&kinopoisk_id={kinopoisk_id}&title={HttpUtility.UrlEncode(title)}&original_title={HttpUtility.UrlEncode(original_title)}&year={year}&serial={serial}&href={HttpUtility.UrlEncode(res.Href)}";
                        similar_tpl.Append(res.Title, string.Empty, string.Empty, link, string.Empty);
                    }

                    return rjson ? Content(similar_tpl.ToJson(), "application/json; charset=utf-8") : Content(similar_tpl.ToHtml(), "text/html; charset=utf-8");
                }

                itemUrl = searchResults[0].Href;
            }

            var project = await invoke.GetProject(itemUrl);
            if (project == null)
                return OnError("lme_starlight", refresh_proxy: true);

            if (serial == 1 && project.Seasons.Count > 0)
            {
                if (s == -1)
                {
                    var season_tpl = new SeasonTpl(project.Seasons.Count);
                    for (int i = 0; i < project.Seasons.Count; i++)
                    {
                        var seasonInfo = project.Seasons[i];
                        string seasonName = string.IsNullOrEmpty(seasonInfo.Title) ? $"Сезон {i + 1}" : seasonInfo.Title;
                        string link = $"{host}/lite/lme_starlight?imdb_id={imdb_id}&kinopoisk_id={kinopoisk_id}&title={HttpUtility.UrlEncode(title)}&original_title={HttpUtility.UrlEncode(original_title)}&year={year}&serial=1&s={i}&href={HttpUtility.UrlEncode(itemUrl)}";
                        season_tpl.Append(seasonName, link, i.ToString());
                    }

                    return rjson ? Content(season_tpl.ToJson(), "application/json; charset=utf-8") : Content(season_tpl.ToHtml(), "text/html; charset=utf-8");
                }

                if (s < 0 || s >= project.Seasons.Count)
                    return OnError("lme_starlight", refresh_proxy: true);

                var season = project.Seasons[s];
                string seasonSlug = season.Slug;
                var episodes = invoke.GetEpisodes(project, seasonSlug);
                if (episodes == null || episodes.Count == 0)
                    return OnError("lme_starlight", refresh_proxy: true);

                var episode_tpl = new EpisodeTpl();
                int index = 1;
                string seasonNumber = GetSeasonNumber(season, s);
                var orderedEpisodes = episodes
                    .Select(ep => new { Episode = ep, Number = GetEpisodeNumber(ep), Date = GetEpisodeDate(ep) })
                    .OrderBy(ep => ep.Number ?? int.MaxValue)
                    .ThenBy(ep => ep.Date ?? DateTime.MaxValue)
                    .Select(ep => ep.Episode)
                    .ToList();

                foreach (var ep in orderedEpisodes)
                {
                    if (string.IsNullOrEmpty(ep.Hash))
                        continue;

                    string episodeName = string.IsNullOrEmpty(ep.Title) ? $"Епізод {index}" : ep.Title;
                    string callUrl = $"{host}/lite/lme_starlight/play?hash={HttpUtility.UrlEncode(ep.Hash)}&title={HttpUtility.UrlEncode(title ?? original_title)}";
                    episode_tpl.Append(episodeName, title ?? original_title, seasonNumber, index.ToString("D2"), accsArgs(callUrl), "call");
                    index++;
                }

                return rjson ? Content(episode_tpl.ToJson(), "application/json; charset=utf-8") : Content(episode_tpl.ToHtml(), "text/html; charset=utf-8");
            }
            else
            {
                string hash = project.Hash;
                if (string.IsNullOrEmpty(hash) && project.Episodes.Count > 0)
                    hash = project.Episodes.FirstOrDefault(e => !string.IsNullOrEmpty(e.Hash))?.Hash;

                if (string.IsNullOrEmpty(hash))
                    return OnError("lme_starlight", refresh_proxy: true);

                string callUrl = $"{host}/lite/lme_starlight/play?hash={HttpUtility.UrlEncode(hash)}&title={HttpUtility.UrlEncode(title ?? original_title)}";
                var movie_tpl = new MovieTpl(title, original_title, 1);
                movie_tpl.Append(string.IsNullOrEmpty(title) ? "StarLight" : title, accsArgs(callUrl), "call");

                return rjson ? Content(movie_tpl.ToJson(), "application/json; charset=utf-8") : Content(movie_tpl.ToHtml(), "text/html; charset=utf-8");
            }
        }

        [HttpGet]
        [Route("lite/lme_starlight/play")]
        async public Task<ActionResult> Play(string hash, string title)
        {
            await UpdateService.ConnectAsync(host);

            if (string.IsNullOrEmpty(hash))
                return OnError("lme_starlight", refresh_proxy: true);

            var init = loadKit(ModInit.StarLight);
            if (!init.enable)
                return Forbid();

            var invoke = new StarLightInvoke(init, hybridCache, OnLog, proxyManager, httpHydra);
            var result = await invoke.ResolveStream(hash);
            if (result == null || string.IsNullOrEmpty(result.Stream))
                return OnError("lme_starlight", refresh_proxy: true);

            string videoTitle = title ?? result.Name ?? "";

            if (result.Streams != null && result.Streams.Count > 0)
            {
                var streamQuality = new StreamQualityTpl();
                foreach (var item in result.Streams)
                {
                    string streamLink = BuildStreamUrl(init, item.link);
                    streamQuality.Append(streamLink, item.quality);
                }

                var first = streamQuality.Firts();
                string streamUrl = string.IsNullOrEmpty(first.link)
                    ? BuildStreamUrl(init, result.Stream)
                    : first.link;

                return UpdateService.Validate(Content(VideoTpl.ToJson("play", streamUrl, videoTitle, streamquality: streamQuality), "application/json; charset=utf-8"));
            }

            string defaultUrl = BuildStreamUrl(init, result.Stream);
            return UpdateService.Validate(Content(VideoTpl.ToJson("play", defaultUrl, videoTitle), "application/json; charset=utf-8"));
        }

        string BuildStreamUrl(OnlinesSettings init, string streamLink)
        {
            string link = StripLampacArgs(streamLink?.Trim());
            if (string.IsNullOrEmpty(link))
                return link;

            if (ApnHelper.IsEnabled(init))
            {
                if (ModInit.ApnHostProvided || ApnHelper.IsAshdiUrl(link))
                    return ApnHelper.WrapUrl(init, link);

                var noApn = (OnlinesSettings)init.Clone();
                noApn.apnstream = false;
                noApn.apn = null;
                return HostStreamProxy(noApn, link, proxy: proxyManager.Get());
            }

            return HostStreamProxy(init, link, proxy: proxyManager.Get());
        }

        private static string StripLampacArgs(string url)
        {
            if (string.IsNullOrEmpty(url))
                return url;

            string cleaned = System.Text.RegularExpressions.Regex.Replace(
                url,
                @"([?&])(account_email|uid|nws_id)=[^&]*",
                "$1",
                System.Text.RegularExpressions.RegexOptions.IgnoreCase
            );

            cleaned = cleaned.Replace("?&", "?").Replace("&&", "&").TrimEnd('?', '&');
            return cleaned;
        }

        private static string GetSeasonNumber(SeasonInfo season, int fallbackIndex)
        {
            if (season?.Title == null)
                return (fallbackIndex + 1).ToString();

            var digits = new string(season.Title.Where(char.IsDigit).ToArray());
            return string.IsNullOrEmpty(digits) ? (fallbackIndex + 1).ToString() : digits;
        }

        private static int? GetEpisodeNumber(EpisodeInfo episode)
        {
            if (episode == null)
                return null;

            if (episode.Number.HasValue)
                return episode.Number.Value;

            if (string.IsNullOrEmpty(episode.Title))
                return null;

            var title = episode.Title;
            var markers = new[] { "випуск", "серия", "серія" };
            foreach (var marker in markers)
            {
                var markerIndex = title.IndexOf(marker, StringComparison.OrdinalIgnoreCase);
                if (markerIndex <= 0)
                    continue;

                var prefix = title.Substring(0, markerIndex);
                var matches = Regex.Matches(prefix, "\\d+");
                if (matches.Count == 0)
                    continue;

                var last = matches[matches.Count - 1].Value;
                if (int.TryParse(last, NumberStyles.Integer, CultureInfo.InvariantCulture, out var number))
                    return number;
            }

            return null;
        }

        private static DateTime? GetEpisodeDate(EpisodeInfo episode)
        {
            if (episode == null || string.IsNullOrEmpty(episode.Date))
                return null;

            if (DateTime.TryParseExact(episode.Date, "yyyy-MM-dd HH:mm:ss", CultureInfo.InvariantCulture, DateTimeStyles.None, out var dt))
                return dt;

            return DateTime.TryParse(episode.Date, CultureInfo.InvariantCulture, DateTimeStyles.None, out dt) ? dt : null;
        }

        private static bool IsCheckOnlineSearchEnabled()
        {
            try
            {
                var onlineType = Type.GetType("Online.ModInit");
                if (onlineType == null)
                {
                    foreach (var asm in AppDomain.CurrentDomain.GetAssemblies())
                    {
                        onlineType = asm.GetType("Online.ModInit");
                        if (onlineType != null)
                            break;
                    }
                }
                var confField = onlineType?.GetField("conf", System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Static);
                var conf = confField?.GetValue(null);
                var checkProp = conf?.GetType().GetProperty("checkOnlineSearch", System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance);

                if (checkProp?.GetValue(conf) is bool enabled)
                    return enabled;
            }
            catch
            {
            }

            return true;
        }

        private static void OnLog(string message)
        {
            System.Console.WriteLine(message);
        }
    }
}