#nullable enable

using System;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using BotFramework;
using Castle.Core.Internal;
using Kruzya.TelegramBot.Core.Data;
using Kruzya.TelegramBot.Core.Extensions;
using Microsoft.Extensions.Logging;
using Telegram.Bot;
using Telegram.Bot.Types;

namespace West.Entertainment.Handler.Fun
{
    public abstract class AbstractAnimationReply : BotEventHandler
    {
        private readonly CoreContext _db;

        private readonly ILogger _logger;

        protected virtual TimeSpan Cooldown => TimeSpan.FromMinutes(new Random().Next(10, 1337));

        protected Message? Message => RawUpdate.Message;

        private User? RepliedUser => Message?.ReplyToMessage?.From;
        
        protected abstract Regex AnimationMatch
        {
            get;
        }
        
        protected AbstractAnimationReply(CoreContext db, ILogger logger)
        {
            _db = db;
            _logger = logger;
        }
        
        protected abstract string GetAnimationName();
        
        protected virtual bool CanHandle() => true;
        
        protected async Task HandleSetAnimation()
        {
            var animation = Message?.ReplyToMessage?.Animation;
            if (await CanPunish() || animation == null) return;

            var animationFileOption = await GetAnimationFileOption();
            animationFileOption.SetValue(animation.FileId);
            _db.AddOrUpdate(animationFileOption);
        }

        // ReSharper disable once MemberCanBeProtected.Global
        public virtual async Task<bool> HandleAnimation()
        {
            var text = Message!.Text!.ToLower();
            if (!AnimationMatch.IsMatch(text.ToLower()) || text.StartsWith("/set") || !CanHandle()) return false;

            var animationFileId = (await GetAnimationFileOption()).GetValue(string.Empty);
            var nextUseOption = await GetNextUseOption();

            _logger.LogDebug("Animation: {Text}, ToLower: {ToLowerText}", 
                Message!.Text, Message!.Text!.ToLower());
            
            if (animationFileId.IsNullOrEmpty()) return false;
            
            var nextUseDt = nextUseOption.GetValue<DateTime>();
            if (nextUseDt > DateTime.Now)
            {
                _logger.LogInformation("{Name} is on cooldown for chat \"{ChatTitle}\". Will be available at {Time}",
                    GetAnimationName(), Chat.Title, nextUseDt);

                return false;
            }
            
            await Bot.SendAnimationAsync(Chat.Id, animationFileId, 
                replyToMessageId: GetMessageIdToReply() ?? Message?.MessageId);

            nextUseOption.SetValue(DateTime.Now + Cooldown);
            _db.AddOrUpdate(nextUseOption);
            
            return true;
        }
        
        private async Task<BotUserValue> GetAnimationFileOption()
        {
            return await _db.UserValues.FindOrCreateOption(Chat.Id, $"{GetAnimationName()}File");
        }

        private async Task<BotUserValue> GetNextUseOption()
        {
            return await _db.UserValues.FindOrCreateOption(Chat.Id, $"{GetAnimationName()}NextUse");
        }

        private async Task<bool> CanPunish()
        {
            return RepliedUser != null && await Bot.CanPunishMember(Chat, From, RepliedUser);
        }
        
        protected virtual int? GetMessageIdToReply() => Message?.MessageId;
    }
}