using System;
using System.Collections.Generic;

namespace PeopleManagement
{
    class Person
    {
        public int Number;
        public string Name;
        public string Phone, Email, year;

        public Person(string name, string phone, string email)
        {
            Name = name;
            Phone = phone;
            Email = email;
        }

        public Person()
        {
        }

        public virtual void personal_info()
        {
            Console.Write($"순번 : {Number} 이름 : {Name} 전화번호 : {Phone} 이메일 : {Email}");
        }
    }

    class Student : Person
    {
        private readonly int _studentNumber;
        private int _price;
        private new int year; // 학년
        private readonly string _major;

        public Student(string name, string phone, string email, int studentNumber, string major, int year) : base(name, phone, email)
        {
            _studentNumber = studentNumber;
            _major = major;
            this.year = year;
        }

        public Student()
        {
        }

        public int Price
        {
            get => _price;
            set
            {
                if (value > 500)
                {
                    Console.WriteLine("최대 수혜 장학금은 500이 넘지 않아야 함");
                }
                else
                {
                    _price = value;
                }
            }
        }

        public override void personal_info()
        {
            Console.WriteLine($"순번 : {Number} 이름 : {Name} 전화번호 : {Phone} 이메일 : {Email} 학번 : {_studentNumber} " +
                              $"학과 : {_major} 학년 : {year} 장학금 : {Price}");
        }
    }

    internal class Professor : Person
    {
        private readonly string _grade;
        private readonly int _officeNumber;
        private new readonly int year;

        public Professor( string name, string phone, string email, string grade, int officeNumber, int year)
            : base(name, phone, email)
        {
            _grade = grade;
            _officeNumber = officeNumber;
            this.year = year;
        }

        public new void personal_info()
        {
            Console.WriteLine($"직급 : {_grade} 사무실 : {_officeNumber} 근무년수 : {year}");
        }
    }


    class Program
    {
        private static int InputChoiceReturnInt()
        {
            var choice = int.Parse(Console.ReadLine() ?? throw new InvalidOperationException());
            return choice;
        }

        private static string InputChoiceReturnString()
        {
            var inputStr = Console.ReadLine();
            return inputStr;
        }

        private static int MainMenu()
        {
            Console.WriteLine("1.추가 2.현황 출력 3.종료");
            return InputChoiceReturnInt();
        }

        private static Student NewStudent(int numIdx)
        {
            Console.Write("이름: ");
            var name = InputChoiceReturnString();
            Console.Write("전화번호: ");
            var phone = InputChoiceReturnString();
            Console.Write("이메일: ");
            var email = InputChoiceReturnString();
            Console.Write("생년: ");
            var year = InputChoiceReturnString();
            Console.Write("학번: ");
            var number = InputChoiceReturnInt();
            Console.Write("학과: ");
            var major = InputChoiceReturnString();
            Console.Write("학년: ");
            var year2 = InputChoiceReturnInt();
            Console.Write("장학금: ");
            var price = InputChoiceReturnInt();

            var tempStudent = new Student(name, phone, email, number, major, year2)
            {
                year = year,
                Number = numIdx,
                Price = price
            };

            return tempStudent;
        }

        private static Professor NewProfessor(int numIdx)
        {
            Console.Write("이름: ");
            var name = InputChoiceReturnString();
            Console.Write("전화번호: ");
            var phone = InputChoiceReturnString();
            Console.Write("이메일: ");
            var email = InputChoiceReturnString();
            Console.Write("생년: ");
            var year = InputChoiceReturnString();
            Console.Write("직급: ");
            var grade = InputChoiceReturnString();
            Console.Write("사무실: ");
            var officeNumber = InputChoiceReturnInt();
            Console.Write("근무년수: ");
            var year2 = InputChoiceReturnInt();

            var tempProfessor = new Professor(name, phone, email, grade, officeNumber, year2);

            ((Person)tempProfessor).year = year;
            tempProfessor.Number = numIdx;

            return tempProfessor;
        }

        public static Person AddProcess(int num)
        {
            Console.WriteLine("1. 학생 2. 교직원");
            var choice = InputChoiceReturnInt();

            switch (choice)
            {
                case 1:
                    var newStudent = NewStudent(num);
                    return newStudent;
                case 2:
                    var newProfessor = NewProfessor(num);
                    return newProfessor;
                   default:
                       return null;
            }
        }

        public static void PerSetting(List<Person> persons)
        {
            var p0Person = new Person("aaa", "01012345678", "aaa@hnu.ac.kr") {year = "2010", Number = 0};
            var p1Student = new Student("bbb", "0102093744", "bbb@hnu.kr", 20120001, "Computer", 1) {Price = 250, Number = 1};
            var p2Professor = new Professor("ccc", "01034634690", "ccc@hnu.kr", "Professor", 90100, 20){Number = 2};
            var p3Person = new Person("ddd", "01088959078", "ddd@hnu.kr"){Number = 3};
            var p4Student = new Student("eee", "01023487909", "eee@hnu.kr", 20136789, "Computer", 3){Price = 0, Number = 4};
            var p5Professor = new Professor("ccc", "01086446788", "ttt@hnu.kr", "Professor", 90200, 30) { Number = 5 };
            var p6Student = new Student("eee", "0107894563", "eee@hnu.kr", 20130001, "컴퓨터통신무인기술학과", 2){Price = 400, Number = 6};
            var p7Professor = new Professor("ggg", "01074125896", "ggg@hnu.kr", "조교수", 90200, 5){Number = 7};

            persons.Add(p0Person);
            persons.Add(p1Student);
            persons.Add(p2Professor);
            persons.Add(p3Person);
            persons.Add(p4Student);
            persons.Add(p5Professor);
            persons.Add(p6Student);
            persons.Add(p7Professor);
        }

        public static void StatusPrint(List<Person> personList)
        {
            foreach (var person in personList)
            {
                switch (person)
                {
                    case Professor _:
                        ((Person)person).personal_info();
                        ((Professor)person).personal_info();
                        break;
                    case Student _:
                        person.personal_info();
                        break;
                    default:
                        person.personal_info();
                        Console.WriteLine();
                        break;
                }
            }
        }

        private static void Main()
        {
            var lsPersons = new List<Person>();
            PerSetting(lsPersons);

            while (true)
            {
                var myChoice = MainMenu();

                switch (myChoice)
                {
                    case 1:
                        var newPerson = AddProcess(lsPersons.Count);
                        lsPersons.Add(newPerson);
                        break;
                    case 2:
                        StatusPrint(lsPersons);
                        break;
                    case 3:
                        Environment.Exit(0);
                        break;
                }

                Console.WriteLine();
            }
        }
    }
}