#nullable enable

using System;
using System.Threading.Tasks;
using BotFramework.Abstractions;
using Kruzya.TelegramBot.Core.Data;
using Kruzya.TelegramBot.Core.Extensions;
using Telegram.Bot;
using Telegram.Bot.Types;

namespace West.TelegramBot.ChatManagement.Service;

public class WarnService
{
    public delegate void WarnHandler(ITelegramBotClient bot, Chat chat, User from, User to, int count, bool isBanned = false);
    public delegate void UnWarnHandler(ITelegramBotClient bot, Chat chat, User from, User to, int count);

    public static event WarnHandler? WarnEvent;
    public static event UnWarnHandler? UnWarnEvent;

    private readonly CoreContext _db;
    private readonly ITelegramBotClient _bot;

    public WarnService(CoreContext db, IBotInstance bot)
    {
        _db = db;
        _bot = bot.BotClient;
    }

    public async Task WarnChatUserAsync(Chat chat, User from, User to)
    {
        var warnOption = await GetWarnOption(chat, to);
        var warnCount = warnOption.GetValue<int>() + 1;

        if (warnCount >= 3)
        {
            try
            {
                await _bot.RestrictChatMember(
                    chat.Id,
                    to.Id,
                    new ChatPermissions
                    {
                        CanSendMessages = false
                    },
                    untilDate: DateTime.Now.AddDays(7)
                );
                warnCount = 0;
            }
            catch
            {
                await _bot.SendMessage(chat.Id, "У меня нет прав на блокировку пользователя.");
            }
        }

        warnOption.SetValue(warnCount);
        _db.AddOrUpdate(warnOption);
        WarnEvent?.Invoke(_bot, chat, from, to, warnCount == 0 ? 3 : warnCount, warnCount == 0);
    }

    public async Task UnWarnChatUserAsync(Chat chat, User from, User user)
    {
        var warnOption = await GetWarnOption(chat, user);
        var warnCount = warnOption.GetValue<int>();
        if (warnCount == 0) return;

        warnCount = Math.Max(warnCount - 1, 0);
        warnOption.SetValue(warnCount);
        _db.AddOrUpdate(warnOption);

        UnWarnEvent?.Invoke(_bot, chat, from, user, warnCount);
    }

    protected async Task<BotUserValue> GetWarnOption(Chat chat, User user)
    {
        return await _db.UserValues.FindOrCreateOption(chat.Id, user.Id, "warnCount");
    }
}