PARSE_ALL

using System;

namespace Checker
{
    public static class InputChecker
    {
        /// <summary>
        /// Checks if inputed value meets the conditions.
        /// </summary>
        /// <returns><c>true</c>, if value met the conditions, <c>false</c> otherwise.</returns>
        /// <param name="input">Input.</param>
        /// <param name="conditions">Conditions.</param>
        public static bool CheckConditions<T>(T input, params Func<T, bool>[] conditions)
        {
            foreach (Func<T, bool> condition in conditions)
            {
                if (!condition.Invoke(input))
                    return false;
            }
            return true;
        }

        /// <summary>
        /// Inputs and parses the variable of type T.
        /// </summary>
        /// <returns>Variable of type T.</returns>
        /// <param name="input">Input.</param>
        /// <param name="conditions">Conditions.</param>
        public static T InputVar<T>(string input, params Func<T, bool>[] conditions)
        {
            var parser = typeof(T).GetMethod("TryParse", new[] { typeof(string), typeof(T).MakeByRefType() });
            if (parser == null)
                throw new ApplicationException($"Invalid type {typeof(T)}");
            Console.Write($"Enter {input}: ");
            object[] result = { Console.ReadLine(), null};
            while (!(bool)parser.Invoke(null, result) || !CheckConditions((T)result[1], conditions))
            {
                Console.WriteLine("Invalid input format! Try again!");
                Console.Write($"Enter {input}: ");
                result = new object[] { Console.ReadLine(), null };
            }
            return (T)result[1];
        }
    }
}