#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 Telegram.Bot;
using Telegram.Bot.Types;

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

        private const int Cooldown = 30;
        
        protected Message? Message => RawUpdate.Message;

        private User? RepliedUser => Message?.ReplyToMessage?.From;
        
        protected abstract Regex AnimationMatch
        {
            get;
        }
        
        protected AbstractAnimationReply(CoreContext db)
        {
            _db = db;
        }

        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.MarkAsModified(animationFileOption);
        }

        // ReSharper disable once MemberCanBeProtected.Global
        public virtual async Task<bool> HandleAnimation()
        {
            var animationFileId = (await GetAnimationFileOption()).GetValue(string.Empty);
            var lastUseOption = await GetLastUseOption();

            if (animationFileId.IsNullOrEmpty() 
                || !AnimationMatch.IsMatch(Message!.Text!.ToLower()) 
                || !CanHandle()
                || lastUseOption.GetValue<DateTime>() > DateTime.Now) return false;
            

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

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

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

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