using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using ChaosBot.Models;
using ChaosBot.Repositories;
using Discord.Commands;
using Discord.WebSocket;
using NLog;

namespace ChaosBot.Discord.PreConditions
{
    public class CheckModuleEnabled : PreconditionAttribute
    {
        private static ILogger _logger = Program.Logger;
        private readonly string _moduleName;
        public CheckModuleEnabled(string moduleName) => _moduleName = moduleName;

        public override Task<PreconditionResult> CheckPermissionsAsync(ICommandContext context, CommandInfo command, IServiceProvider services)
        {
            // Debug information
            _logger.Trace($"CheckModuleEnabled.CheckPermissionsAsync|Checking module enabled for module: {_moduleName}");

            if (context.Guild == null) return Task.FromResult(PreconditionResult.FromError("This must be run in a guild."));
            
            // Check if module enabled in database
            bool isModuleEnabled = GetResult(context, _moduleName);

            if (isModuleEnabled)
                return Task.FromResult(PreconditionResult.FromSuccess());
            
            // Permission denied
            return Task.FromResult(PreconditionResult.FromError($"You do not have access to this command."));
        }

        public static bool GetResult(ICommandContext context, string moduleName)
        {
            if (context.Guild == null) throw new Exception("This must be run in a guild");
            
            // Check if module enabled in database
            return Convert.ToBoolean(ConfigurationRepository.GetValue<string>($"Module:{moduleName}:Enabled",
                    context.Guild.Id, "true"));
        }
    }
}