using Microsoft.UI.Xaml;
using Renci.SshNet;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text.Json;
using System.Text.Json.Serialization;
using Windows.ApplicationModel.VoiceCommands;
using Windows.Storage.Search;

namespace wakka
{
    public class FeelsPost
    {
        [JsonPropertyName("user")]
        public required string User { get; set; }
        [JsonPropertyName("path")]
        public required string Path { get; set; }
        [JsonPropertyName("m_time")]
        public required long M_Time { get; set; }
        [JsonPropertyName("reported_date")]
        public required long ReportedDate { get; set; }
        public string TimeString { get; set; } = string.Empty;
        public string Body { get; set; } = string.Empty;

        public int WordCount { get; set; } = 0;
    }

    public static class Feels
    {
        public static readonly ObservableCollection<FeelsPost> LoadedFeelsPosts = [];
        private static DispatcherTimer? Timer = null;
        private static List<List<FeelsPost>>? LoadTimeMetadata = null;
        private static int CurrentChunk = 0;

        public static void Initialize()
        {
            if (Timer == null)
                StartTimer();
            if (LoadTimeMetadata == null)
            {
                var feels = AllFeels();
                if (feels != null)
                {
                    LoadTimeMetadata = (List<List<FeelsPost>>)feels.Chunk(10).Select(chunk => chunk.ToList()).ToList();
                    LoadFeelsChunk();
                }
            }
        }

        public static void LoadFeelsChunk()
        {
            if (LoadTimeMetadata == null)
                return;
            var chunk = LoadTimeMetadata[CurrentChunk];
            foreach (var feel in chunk)
            {
                ConstructFeel(feel);
                LoadedFeelsPosts.Add(feel);
            }
            CurrentChunk++;
        }

        private static void StartTimer()
        {
            Timer = new DispatcherTimer();
            Timer.Interval = TimeSpan.FromSeconds(20);
            Timer.Tick += Timer_Tick;
            Timer.Start();
        }

        private static void Timer_Tick(object? sender, object? e)
        {
            GetNewFeels();
        }

        public static void GetNewFeels()
        {
            var newFeels = FeelsAfter(LoadedFeelsPosts[0].M_Time);
            if (newFeels != null)
            {
                var additions = new List<FeelsPost>();
                foreach (var newFeel in newFeels)
                {
                    ConstructFeel(newFeel);
                    FeelsPost? toRemove = null;
                    foreach (var liveFeel in LoadedFeelsPosts)
                    {
                        if (liveFeel.Path.Equals(newFeel.Path))
                        {
                            toRemove = liveFeel;
                            break;
                        }
                    }
                    if (toRemove != null)
                        LoadedFeelsPosts.Remove(toRemove);
                    additions.Add(newFeel);
                }
                additions.Reverse();
                foreach (var feel in additions)
                {
                    LoadedFeelsPosts.Insert(0, feel);
                }
            }
        }

        public static string GetTodayFeelPath()
        {
            var dateString = DateTime.Now.ToString("yyyyMMdd");
            return $"/home/{SshConnection.User}/.ttbp/entries/{dateString}.txt";
        }

        public static string GetTodayFeelBody()
        {
            
            return SshConnection.RunCommand($"cat {GetTodayFeelPath()}");
        }

        public static void PostFeel(string body)
        {
            SshConnection.RunCommandWithInput($"cat > {GetTodayFeelPath()}", body);
        }

        public static List<FeelsPost>? AllFeels()
        {
            return JsonSerializer.Deserialize<List<FeelsPost>>(SshConnection.RunCommand("~nebula/bin/dumpfeels"));
        }

        public static List<FeelsPost>? FeelsAfter(long TimeStamp)
        {
            return JsonSerializer.Deserialize<List<FeelsPost>>(SshConnection.RunCommand($"~nebula/bin/dumpfeels --after {TimeStamp}"));
        }

        public static List<FeelsPost>? FeelsFromUser(string User, List<FeelsPost> Feels)
        {
            return Feels.FindAll(i => i.User == User);
        }

        public static string GetFeelsBody(FeelsPost Post)
        {
            return SshConnection.RunCommand($"cat {Post.Path}");
        }

        private static void ConstructFeel(FeelsPost feel)
        {
            var date = DateTimeOffset.FromUnixTimeSeconds(feel.M_Time).DateTime.ToLocalTime();
            feel.TimeString = date.ToString("HH:mm (dddd, MMMM dd, yyyy)");
            var body = GetFeelsBody(feel);
            char[] delimiters = new char[] { ' ', '\n' };
            feel.WordCount = body.Split(delimiters, StringSplitOptions.RemoveEmptyEntries).Length;
            feel.Body = body;
        }
    }
}