#nullable enable

using BotFramework.Attributes;
using BotFramework.Enums;
using BotFramework.Utils;
using Kruzya.TelegramBot.Core.Data;
using Kruzya.TelegramBot.Core.Extensions;
using Kruzya.TelegramBot.Core.Handler;
using Kruzya.TelegramBot.Core.Service;
using Microsoft.Extensions.Logging;
using Telegram.Bot;
using Telegram.Bot.Types;
using Telegram.Bot.Types.Enums;

namespace West.TelegramBot.Reputation.Handler;

public class Reputation : CommonHandler
{
    private readonly UserService _userService;
    private readonly ILogger _logger;
    private readonly IReputation _reputationService;
    private readonly IAntiFlood _antiFlood;

    private static readonly List<string> RepUpChars = new()
    {
        "+",
        "👍",
        "👍🏼",
        "👍🏽",
        "👍🏾",
        "👍🏿",
        "👍🏻"
    };
    private static readonly List<string> RepDownChars = new()
    {
        "-",
        "👎",
        "👎🏼",
        "👎🏽",
        "👎🏾",
        "👎🏿",
        "👎🏻"
    };

    public Reputation(
        CoreContext db, 
        UserService userService, 
        IReputation reputationService,
        IAntiFlood antiFlood,
        ILogger<Reputation> logger) : base(db)
    {
        _reputationService = reputationService;
        _userService = userService;
        _antiFlood = antiFlood;
        _logger = logger;
    }

    [Message(InChat.Public, MessageFlag.HasText | MessageFlag.HasSticker)]
    public async Task HandleReputation()
    {
        var text = Message?.Text;

        if (string.IsNullOrEmpty(text))
        {
            text = Message?.Sticker?.Emoji;
        }
        if (text == null)
        {
            return;
        }

        var receiver = RepliedUser;
        var canChangeRep = receiver is { IsBot: false } && !From.IsBot && receiver.Id != From.Id;
           
        if (canChangeRep && (RepUpChars.Contains(text) || RepDownChars.Contains(text)))
        {
            if (!_userService.IsUserSuper(From) && !await Bot.IsUserAdminAsync(Chat, From))
            {
                if (_antiFlood.IsUserFlooding(Chat, From))
                {
                    return;
                }

                _antiFlood.RecordAction(Chat, From);
                if (_antiFlood.IsUserFlooding(Chat, From))
                {
                    await Reply(new HtmlString()
                        .UserMention(From).Code(": пользователь отправлен в игнор.")
                        .ToString());
                    return;
                }
            }

            var senderRepCount = await GetUserReputation(From);
            if (senderRepCount < 0)
            {
                await Reply(new HtmlString()
                    .Code("Ты не можешь голосовать с отрицательной репутацией.")
                    .ToString()
                );
                return;
            }

            var diff = await _reputationService.GetReputationDiffAsync(Chat, From, receiver);
            _logger.LogDebug("Calculated diff: {Diff}", diff);

            string action;
            if (RepUpChars.Contains(text))
            {
                action = "увеличил";
            }
            else
            {
                diff *= -1;
                action = "уменьшил";
            }
                
            await _reputationService.IncrementReputationAsync(Chat, receiver, diff);
            
            var receiverRepCount = await GetUserReputation(receiver!);
            _logger.LogDebug("Updated value: {Value}", receiverRepCount);

            await Reply($"{From.ToHtml()}<code>({await GetUserReputation(From)}) " +
                        $"{action} репутацию </code>{receiver.ToHtml()}<code>({Math.Round(receiverRepCount, 2)})</code>");
        }
    }
        
    [ParametrizedCommand(InChat.Public, "setrep", CommandParseMode.Both)]
    public async Task HandleSetRep(double reputation)
    {
        if (!CanModifyUserReputation(RepliedUser))
        {
            return;
        }

        await SendReputationModifyResponse(
            await _reputationService.SetUserReputationAsync(Chat, RepliedUser, reputation)
        );
    }

    [ParametrizedCommand(InChat.Public, "addrep", CommandParseMode.Both)]
    public async Task HandleAddRep(double reputation)
    {
        if (!CanModifyUserReputation(RepliedUser))
        {
            return;
        }

        await SendReputationModifyResponse(
            await _reputationService.IncrementReputationAsync(Chat, RepliedUser, reputation)
        );
    }
    
    [Command(InChat.Public, "top", CommandParseMode.Both)]
    public async Task HandleTop()
    {
        var msg = new HtmlString();
        msg.TextBr("Топ репутации чата: ");
        var i = 1;
        foreach (var rep in await _reputationService.GetChatRatingAsync(Chat))
        {
            // TODO: there are should be more correct fix, but I want to fix this now, West, 18:04, 07.05.2022
            User user;
            try
            {
                user = await _userService.GetUser(rep.UserId, rep.ChatId);
            }
            catch
            {
                continue;
            }

            msg.Text($"{i}. ")
                .Text($"{user.FirstName} {user.LastName}".Trim().HtmlEncode())
                .Text($" ({rep.Value})").Br();
            i++;
        }

        await Bot.SendTextMessageAsync(Chat!, msg.ToString(), parseMode: ParseMode.Html,
            disableNotification: true);
    }
    
    private async Task SendReputationModifyResponse(double reputation)
    {
        await Reply(
            new HtmlString()
                .Code("Пользователю ")
                .UserMention(RepliedUser)
                .Code($" установлена репутация: {reputation}")
                .ToString()
        );
    }
    
    private bool CanModifyUserReputation(User? user)
    {
        if (!_userService.IsUserSuper(From))
        {
            _logger.LogWarning("{User} attempted to modify reputation in {Chat}",
                From.ToLog(),
                Chat.ToLog()
            );
            return false;
        }

        return user is {IsBot: false};
    }
    
    private async Task<double> GetUserReputation(User user)
    {
        return await _reputationService.GetUserReputationAsync(Chat, user);
    }
}