using Console.Waterworks.Core.Attributes;
using Console.Waterworks.Core.Loggers;
using System;
using System.Collections.Generic;
using System.Reflection;

namespace Console.Waterworks.Core.Specialists
{
    class HelpSpecialist
    {
        CW_Logger _logger = new CW_Logger();

        internal MemberInfo[] GetCommandMembers(List<Type> commandClasses) => commandClasses[0].GetMembers();

        internal bool ListCommand(MemberInfo command)
        {
            var customAttributes = GetCustomAttributes(command);
            var castedAttributes = CheckForAttributesType<ListCommandAttribute>(customAttributes);
            return (castedAttributes != null) ? castedAttributes.ShowCommand : false;
        }

        T CheckForAttributesType<T>(object[] attributes)
        {
            T theAttributes = default(T);
            for (int i = 0; i < attributes.Length; i++)
            {
                try
                {
                    theAttributes = (T)attributes[i];
                    break;
                }
                catch (Exception)
                {
                    _logger.LogInfoMessage("The attempted casting attempt failed. Do not panic. This was expected");
                }
            }
            return theAttributes;
        }

        object[] GetCustomAttributes(MemberInfo command) => command.GetCustomAttributes(true) as object[];

        internal object GetParametres(MemberInfo command)
        {
            var attributes = GetCustomAttributes(command);
            var castedAttributes = CheckForAttributesType<ParametersAttribute>(attributes);
            return (castedAttributes != null) ? castedAttributes.Parameters : "Parameters values could not be found";
        }

        internal object GetDescription(MemberInfo command)
        {
            var attributes = GetCustomAttributes(command);
            var castedAttributes = CheckForAttributesType<DescriptionAttribute>(attributes);
            return (castedAttributes != null) ? castedAttributes.Description : "Description could not be found";
        }

        internal object GetUsageExamples(MemberInfo command)
        {
            var attributes = GetCustomAttributes(command);
            var castedAttributes = CheckForAttributesType<UsageAttribute>(attributes);
            return (castedAttributes != null) ? castedAttributes.UsageExample : "Example could not be found";
        }
    }
}