using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Reflection;

using SharedLibraryCore;
using SharedLibraryCore.Configuration;
using SharedLibraryCore.Dtos;
using SharedLibraryCore.Helpers;
using SharedLibraryCore.Interfaces;
using SharedLibraryCore.Services;
using IW4MAdmin.Plugins.Stats.Config;
using IW4MAdmin.Plugins.Stats.Helpers;
using IW4MAdmin.Plugins.Stats.Models;
using SharedLibraryCore.Database;
using Microsoft.EntityFrameworkCore;

namespace IW4MAdmin.Plugins.Stats
{
    public class Plugin : IPlugin
    {
        public string Name => "Simple Stats";

        public float Version => Assembly.GetExecutingAssembly().GetName().Version.Major + Assembly.GetExecutingAssembly().GetName().Version.Minor / 10.0f;

        public string Author => "RaidMax";

        public static StatManager Manager { get; private set; }
        private IManager ServerManager;
        public static BaseConfigurationHandler<StatsConfiguration> Config { get; private set; }

        public async Task OnEventAsync(GameEvent E, Server S)
        {
            switch (E.Type)
            {
                case GameEvent.EventType.Start:
                    Manager.AddServer(S);
                    break;
                case GameEvent.EventType.Stop:
                    break;
                case GameEvent.EventType.Connect:
                    await Manager.AddPlayer(E.Origin);
                    break;
                case GameEvent.EventType.Disconnect:
                    await Manager.RemovePlayer(E.Origin);
                    break;
                case GameEvent.EventType.Say:
                    if (!string.IsNullOrEmpty(E.Data) &&
                        E.Origin.ClientId > 1)
                        await Manager.AddMessageAsync(E.Origin.ClientId, E.Owner.GetHashCode(), E.Data);
                    break;
                case GameEvent.EventType.MapChange:
                    Manager.SetTeamBased(E.Owner.GetHashCode(), E.Owner.Gametype != "dm");
                    Manager.ResetKillstreaks(S.GetHashCode());
                    await Manager.Sync(S);
                    break;
                case GameEvent.EventType.MapEnd:
                    break;
                case GameEvent.EventType.JoinTeam:
                    break;
                case GameEvent.EventType.Broadcast:
                    break;
                case GameEvent.EventType.Tell:
                    break;
                case GameEvent.EventType.Kick:
                    break;
                case GameEvent.EventType.Ban:
                    break;
                case GameEvent.EventType.Unknown:
                    break;
                case GameEvent.EventType.Report:
                    break;
                case GameEvent.EventType.Flag:
                    break;
                case GameEvent.EventType.ScriptKill:
                    string[] killInfo = (E.Data != null) ? E.Data.Split(';') : new string[0];
                    if (killInfo.Length >= 14)
                    {
                        await Manager.AddScriptHit(false, E.Time, E.Origin, E.Target, S.GetHashCode(), S.CurrentMap.Name, killInfo[7], killInfo[8],
                            killInfo[5], killInfo[6], killInfo[3], killInfo[4], killInfo[9], killInfo[10], killInfo[11], killInfo[12], killInfo[13], killInfo[14], killInfo[15]);
                    }
                    break;
                case GameEvent.EventType.Kill:
                    if (!E.Owner.CustomCallback)
                    {
                        await Manager.AddStandardKill(E.Origin, E.Target);
                    }
                    break;
                case GameEvent.EventType.Damage:
                    if (!E.Owner.CustomCallback)
                    {
                        Manager.AddDamageEvent(E.Data, E.Origin.ClientId, E.Target.ClientId, E.Owner.GetHashCode());
                    }
                    break;
                case GameEvent.EventType.ScriptDamage:
                    killInfo = (E.Data != null) ? E.Data.Split(';') : new string[0];
                    if (killInfo.Length >= 14)
                    {
                        await Manager.AddScriptHit(true, E.Time, E.Origin, E.Target, S.GetHashCode(), S.CurrentMap.Name, killInfo[7], killInfo[8],
                            killInfo[5], killInfo[6], killInfo[3], killInfo[4], killInfo[9], killInfo[10], killInfo[11], killInfo[12], killInfo[13], killInfo[14], killInfo[15]);
                    }
                    break;
            }
        }

        public async Task OnLoadAsync(IManager manager)
        {
            // load custom configuration
            Config = new BaseConfigurationHandler<StatsConfiguration>("StatsPluginSettings");
            if (Config.Configuration() == null)
            {
                Config.Set((StatsConfiguration)new StatsConfiguration().Generate());
                await Config.Save();
            }

            // register the topstats page
            // todo:generate the URL/Location instead of hardcoding
            manager.GetPageList()
                .Pages.Add(
                    Utilities.CurrentLocalization.LocalizationIndex["PLUGINS_STATS_COMMANDS_TOP_TEXT"],
                   "/Stats/TopPlayersAsync");

            // meta data info
            async Task<List<ProfileMeta>> getStats(int clientId)
            {
                IList<EFClientStatistics> clientStats;
                using (var ctx = new DatabaseContext(disableTracking: true))
                {
                    clientStats = await ctx.Set<EFClientStatistics>().Where(c => c.ClientId == clientId).ToListAsync();
                }

                int kills = clientStats.Sum(c => c.Kills);
                int deaths = clientStats.Sum(c => c.Deaths);
                double kdr = Math.Round(kills / (double)deaths, 2);
                var validPerformanceValues = clientStats.Where(c => c.Performance > 0);
                int performancePlayTime = validPerformanceValues.Sum(s => s.TimePlayed);
                double performance = Math.Round(validPerformanceValues.Sum(c => c.Performance * c.TimePlayed / performancePlayTime), 2);
                double spm = Math.Round(clientStats.Sum(c => c.SPM) / clientStats.Where(c => c.SPM > 0).Count(), 1);

                return new List<ProfileMeta>()
                {
                    new ProfileMeta()
                    {
                        Key = Utilities.CurrentLocalization.LocalizationIndex["WEBFRONT_CLIENT_META_RANKING"],
                        Value = "#" + await StatManager.GetClientOverallRanking(clientId),
                    },
                    new ProfileMeta()
                    {
                           Key = Utilities.CurrentLocalization.LocalizationIndex["PLUGINS_STATS_TEXT_KILLS"],
                           Value = kills
                    },
                    new ProfileMeta()
                    {
                        Key = Utilities.CurrentLocalization.LocalizationIndex["PLUGINS_STATS_TEXT_DEATHS"],
                        Value = deaths
                    },
                    new ProfileMeta()
                    {
                        Key = Utilities.CurrentLocalization.LocalizationIndex["PLUGINS_STATS_TEXT_KDR"],
                        Value = kdr
                    },
                    new ProfileMeta()
                    {
                        Key = Utilities.CurrentLocalization.LocalizationIndex["PLUGINS_STATS_COMMANDS_PERFORMANCE"],
                        Value = performance
                    },
                    new ProfileMeta()
                    {
                        Key = Utilities.CurrentLocalization.LocalizationIndex["PLUGINS_STATS_META_SPM"],
                        Value = spm
                    }
                };
            }

            async Task<List<ProfileMeta>> getAnticheatInfo(int clientId)
            {
                IList<EFClientStatistics> clientStats;
                using (var ctx = new DatabaseContext(disableTracking: true))
                {
                    clientStats = await ctx.Set<EFClientStatistics>()
                        .Include(c => c.HitLocations)
                        .Where(c => c.ClientId == clientId)
                        .ToListAsync();
                }

                double headRatio = 0;
                double chestRatio = 0;
                double abdomenRatio = 0;
                double chestAbdomenRatio = 0;
                double hitOffsetAverage = 0;
                double maxStrain = clientStats.Count(c => c.MaxStrain > 0) == 0 ? 0 : clientStats.Max(cs => cs.MaxStrain);

                if (clientStats.Where(cs => cs.HitLocations.Count > 0).FirstOrDefault() != null)
                {
                    chestRatio = Math.Round(clientStats.Where(c => c.HitLocations.Count > 0).Sum(c =>
                    c.HitLocations.First(hl => hl.Location == IW4Info.HitLocation.torso_upper).HitCount) /
                    (double)clientStats.Where(c => c.HitLocations.Count > 0)
                    .Sum(c => c.HitLocations.Where(hl => hl.Location != IW4Info.HitLocation.none).Sum(f => f.HitCount)), 2);

                    abdomenRatio = Math.Round(clientStats.Where(c => c.HitLocations.Count > 0).Sum(c =>
                         c.HitLocations.First(hl => hl.Location == IW4Info.HitLocation.torso_lower).HitCount) /
                         (double)clientStats.Where(c => c.HitLocations.Count > 0).Sum(c => c.HitLocations.Where(hl => hl.Location != IW4Info.HitLocation.none).Sum(f => f.HitCount)), 2);

                    chestAbdomenRatio = Math.Round(clientStats.Where(c => c.HitLocations.Count > 0).Sum(cs => cs.HitLocations.First(hl => hl.Location == IW4Info.HitLocation.torso_upper).HitCount) /
                         (double)clientStats.Where(c => c.HitLocations.Count > 0).Sum(cs => cs.HitLocations.First(hl => hl.Location == IW4Info.HitLocation.torso_lower).HitCount), 2);

                    headRatio = Math.Round(clientStats.Where(c => c.HitLocations.Count > 0).Sum(cs => cs.HitLocations.First(hl => hl.Location == IW4Info.HitLocation.head).HitCount) /
                         (double)clientStats.Where(c => c.HitLocations.Count > 0)
                            .Sum(c => c.HitLocations.Where(hl => hl.Location != IW4Info.HitLocation.none).Sum(f => f.HitCount)), 2);

                    var validOffsets = clientStats.Where(c => c.HitLocations.Count(hl => hl.HitCount > 0) > 0).SelectMany(hl => hl.HitLocations);
                    hitOffsetAverage = validOffsets.Sum(o => o.HitCount * o.HitOffsetAverage) / (double)validOffsets.Sum(o => o.HitCount);
                }

                return new List<ProfileMeta>()
                {
                    new ProfileMeta()
                    {
                        Key = "Chest Ratio",
                        Value = chestRatio,
                        Sensitive = true
                    },
                    new ProfileMeta()
                    {
                        Key = "Abdomen Ratio",
                        Value = abdomenRatio,
                        Sensitive = true
                    },
                    new ProfileMeta()
                    {
                        Key = "Chest To Abdomen Ratio",
                        Value = chestAbdomenRatio,
                        Sensitive = true
                    },
                    new ProfileMeta()
                    {
                        Key = "Headshot Ratio",
                        Value = headRatio,
                        Sensitive = true
                    },
                    new ProfileMeta()
                    {
                        Key = "Hit Offset Average",
                        // todo: make sure this is wrapped somewhere else
                        Value = $"{Math.Round(((float)hitOffsetAverage), 4).ToString(new System.Globalization.CultureInfo(Utilities.CurrentLocalization.LocalizationName))}°",
                        Sensitive = true
                    },
                    new ProfileMeta()
                    {
                        Key = "Max Strain",
                        Value = Math.Round(maxStrain, 3),
                        Sensitive = true
                    },
                };
            }

            async Task<List<ProfileMeta>> getMessages(int clientId)
            {
                List<ProfileMeta> messageMeta;
                using (var ctx = new DatabaseContext(disableTracking: true))
                {
                    var messages = ctx.Set<EFClientMessage>().Where(m => m.ClientId == clientId);

                    messageMeta = await messages.Select(m => new ProfileMeta()
                    {
                        Key = "EventMessage",
                        Value = m.Message,
                        When = m.TimeSent,
                        Extra = m.ServerId.ToString()
                    }).ToListAsync();
                }

                messageMeta.Add(new ProfileMeta()
                {
                    Key = Utilities.CurrentLocalization.LocalizationIndex["WEBFRONT_PROFILE_MESSAGES"],
                    Value = messageMeta.Count
                });

                return messageMeta;
            }

            MetaService.AddMeta(getStats);

            if (Config.Configuration().EnableAntiCheat)
            {
                MetaService.AddMeta(getAnticheatInfo);
            }

            MetaService.AddMeta(getMessages);

            string totalKills(Server server)
            {
                using (var ctx = new DatabaseContext(disableTracking: true))
                {
                    long kills = ctx.Set<EFServerStatistics>().Where(s => s.Active).Sum(s => s.TotalKills);
                    return kills.ToString("#,##0");
                }
            }

            string totalPlayTime(Server server)
            {
                using (var ctx = new DatabaseContext(disableTracking: true))
                {
                    long playTime = ctx.Set<EFServerStatistics>().Where(s => s.Active).Sum(s => s.TotalPlayTime);
                    return (playTime / 3600.0).ToString("#,##0");
                }
            }

            string topStats(Server s)
            {
                return String.Join(Environment.NewLine, Commands.TopStats.GetTopStats(s).Result);
            }

            string mostPlayed(Server s)
            {
                return String.Join(Environment.NewLine, Commands.MostPlayed.GetMostPlayed(s).Result);
            }

            manager.GetMessageTokens().Add(new MessageToken("TOTALKILLS", totalKills));
            manager.GetMessageTokens().Add(new MessageToken("TOTALPLAYTIME", totalPlayTime));
            manager.GetMessageTokens().Add(new MessageToken("TOPSTATS", topStats));
            manager.GetMessageTokens().Add(new MessageToken("MOSTPLAYED", mostPlayed));

            ServerManager = manager;

            Manager = new StatManager(manager);
        }

        public Task OnTickAsync(Server S) => Task.CompletedTask;

        public async Task OnUnloadAsync()
        {
            foreach (var sv in ServerManager.GetServers())
                await Manager.Sync(sv);
        }
    }
}