using System;
using System.Diagnostics;

// ReSharper disable CheckNamespace

namespace DemoApplication.ModelView
{
    public static class RandomGenerator
    {
        #region Private Fields

        private static readonly string[] Consonants =
        {
            "b","c","d","f","g","h","j","k","l","m","n","p","q","r","s","t","v","w","x","y","z"
        };

        private static readonly string[] FirstNames =
        {
            "Aiden","Jackson","Mason","Liam","Jacob","Jayden","Ethan","Noah","Lucas","Logan","Caleb","Caden","Jack","Ryan","Connor","Michael","Elijah","Brayden","Benjamin","Nicholas","Alexander",
            "William","Matthew","James","Landon","Nathan","Dylan","Evan","Luke","Andrew","Gabriel","Gavin","Joshua","Owen","Daniel","Carter","Tyler","Cameron","Christian","Wyatt","Henry","Eli",
            "Joseph","Max","Isaac","Samuel","Anthony","Grayson","Zachary","David","Christopher","John","Isaiah","Levi","Jonathan","Oliver","Chase","Cooper","Tristan","Colton","Austin","Colin",
            "Charlie","Dominic","Parker","Hunter","Thomas","Alex","Ian","Jordan","Cole","Julian","Aaron","Carson","Miles","Blake","Brody","Adam","Sebastian","Adrian","Nolan","Sean","Riley",
            "Bentley","Xavier","Hayden","Jeremiah","Jason","Jake","Asher","Micah","Jace","Brandon","Josiah","Hudson","Nathaniel","Bryson","Ryder","Justin","Bryce", "",  null
        };

        private static readonly string[] LastNames =
                {
            "Smith", "Johnson", "Williams", "Jones", "Brown", "Davis", "Miller", "Wilson", "Moore", "Taylor", "Anderson", "Thomas", "Jackson", "White", "Harris", "Martin", "Thompson", "Garcia",
            "Martinez", "Robinson", "Clark", "Rodriguez", "Lewis", "Lee", "Walker", "Hall", "Allen", "Young", "Hernandez", "King", "Wright", "Lopez", "Hill", "Scott", "Green", "Adams", "Baker",
            "Gonzalez", "Nelson", "Carter", "Mitchell", "Perez", "Roberts", "Turner", "Phillips", "Campbell", "Parker", "Evans", "Edwards", "Collins", "Stewart", "Sanchez", "Morris", "Rogers",
            "Reed", "Cook", "Morgan", "Bell", "Murphy", "Bailey", "Rivera", "Cooper", "Richardson", "Cox", "Howard", "Ward", "Torres", "Peterson", "Gray", "Ramirez", "James", "Watson", "Brooks",
            "Kelly", "Sanders", "Price", "Bennett", "Wood", "Barnes", "Ross", "Henderson", "Coleman", "Jenkins", "Perry", "Powell", "Long", "Patterson", "Hughes", "Flores", "Washington", "Butler",
            "Simmons", "Foster", "Gonzales", "Bryant", "Alexander", "Russell", "Griffin", "Diaz", "Hayes", "", null
        };

        private static readonly Random Rnd;
        private static readonly string[] Vowels = { "a", "e", "i", "o", "u", "y" };

        #endregion Private Fields

        #region Public Constructors

        static RandomGenerator()
        {
            Rnd = new Random();
        }

        #endregion Public Constructors

        #region Public Methods

        /// <summary>
        /// Create random employee
        /// </summary>
        /// <returns></returns>
        public static Employe CreateRandomEmployee(bool distinct = false)
        {
            // distinct lastName or not
            var emp = new Employe
                (distinct ? GenerateName() : LastNames[Rnd.Next(LastNames.Length)],
                FirstNames[Rnd.Next(FirstNames.Length)],
                // salary
                Rnd.Next(1, 11) * 10,
                // start date
                Rnd.Next(0, 10) != 1 ? new DateTime(2015 + Rnd.Next(4), Rnd.Next(12) + 1, Rnd.Next(28) + 1) : (DateTime?)null,
                // is manager
                Rnd.Next() % 2 == 1);
            return emp;
        }

        /// <summary>
        /// Display a list of random names (for testing)
        /// </summary>
        /// <param name="num"></param>
        public static void Generate(int num = 100)
        {
            for (var i = 0; i < num; i++)
            {
                GenerateName(true);
            }
        }

        #endregion Public Methods

        #region Private Methods

        /// <summary>
        /// GenerateName
        /// </summary>
        /// <returns></returns>
        private static string GenerateName(bool debug = false)
        {
            var name = "";

            // Capitalize the first letter 
            name += Consonants[Rnd.Next(Consonants.Length)].ToUpper();
            name += Vowels[Rnd.Next(Vowels.Length)];

            var nameLength = name.Length;

            // set the final name size
            var len = Rnd.Next(5, 8 + nameLength);

            while (nameLength <= len)
            {
                if (nameLength % 2 == 1)
                    name += Consonants[Rnd.Next(Consonants.Length)];
                else
                    name += Vowels[Rnd.Next(Vowels.Length)];

                nameLength++;
            }

            Debug.WriteLineIf(debug, $"{name,-16} length : {name.Length}");

            return name;
        }

        #endregion Private Methods
    }
}