using System;
using System.Collections.Generic;
using System.IO;
using Application;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace UnitTestProject
{
    [TestClass]
    public class UserTest
    {
        public int setArrangePesel(string pesel)
        {
            User user = new User();
            user.Pesel = pesel;

            return user.CheckingPesel();
        }

        public void setArrangeListOfUsers(ref List<User> list_of_users)
        {
            list_of_users.Add(new User() { FirstName = "Adam", LastName = "Kowalski", City = "Poznań", Pesel = "98042155976" });
            list_of_users.Add(new User() { FirstName = "Jan", LastName = "Nowak", City = "Bydgoszcz", Pesel = "85070789433" });
            list_of_users.Add(new User() { FirstName = "Adam", LastName = "Kowalski", City = "Warszawa", Pesel = "55122952416" });
        }

        public bool CheckConditionOfUserExist(ref List<User> list_of_users,User u1)
        {
            bool condition = false;
            foreach (var user in list_of_users)
            {
                if (u1.Equals(user))
                {
                    condition = true;
                    break;
                }
            }
            return condition;
        }
        ////////////////////////////////////////////////////////////////////////////
        /// check Pesel

        [TestMethod]
        public void CheckingValidPesel()
        {
            //arrange
            int actualResult = setArrangePesel("47042886355");
            int expectedResult = 0;

            //Assert
            Assert.AreEqual(expectedResult, actualResult);
        }

        ///checking invalid pesel
        [TestMethod]
        public void InvalidDigitControl()
        {
            //arrange
            int actualResult = setArrangePesel("47042886356");
            int expectedResult = 1;

            //Assert
            Assert.AreEqual(expectedResult, actualResult);
        }

        [TestMethod]
        public void InvalidDateOfPesel()
        {
            //arrange
            int actualResult = setArrangePesel("47007286356");
            int expectedResult = 2;

            //Assert
            Assert.AreEqual(expectedResult, actualResult);
        }

        [TestMethod]
        public void InvalidCharactersOfPesel()
        {
            //arrange
            int actualResult = setArrangePesel("47042886a56");
            int expectedResult = 3;

            //Assert
            Assert.AreEqual(expectedResult, actualResult);
        }

        [TestMethod]
        public void InvalidLengthOfPesel()
        {
            //arrange
            int actualResult = setArrangePesel("474");
            int expectedResult = 4;

            //Assert
            Assert.AreEqual(expectedResult, actualResult);
        }


        ////////////////////////////////////////////////////////////////////////////
        //user exists
        [TestMethod]
        public void CheckNotExistingUser()
        {
            //arrange
            var list_of_users = new List<User>();
            setArrangeListOfUsers(ref list_of_users);
            User u1 =new User(){ FirstName = "Andrzej", LastName = "Frankowski", City = "Lublin", Pesel = "71052429624" };

            bool conditionBeforeAddUser = CheckConditionOfUserExist(ref list_of_users, u1);
            bool condition = User.UserExists(ref list_of_users, u1);
            bool conditionAfterAddUser = CheckConditionOfUserExist(ref list_of_users, u1);


            //Assert
            Assert.IsFalse(condition);
            Assert.IsFalse(conditionBeforeAddUser);
            Assert.IsFalse(conditionAfterAddUser);
        }

        //user with this same pesel but diffrent name and surname
        [TestMethod]
        public void CheckExistingUser1()
        {
            //arrange
            var list_of_users = new List<User>();
            setArrangeListOfUsers(ref list_of_users);
            User u1 = new User() { FirstName = "Andrzej", LastName = "Frankowski", City = "Lublin", Pesel = "55122952416" };

            bool conditionBeforeAddUser = CheckConditionOfUserExist(ref list_of_users, u1);
            bool condition = User.UserExists(ref list_of_users, u1);
            bool conditionAfterAddUser = CheckConditionOfUserExist(ref list_of_users, u1);

            //Assert
            Assert.IsTrue(condition);
            Assert.IsFalse(conditionBeforeAddUser);
            Assert.IsTrue(conditionAfterAddUser);
        }

        //user with this same pesel and other data
        [TestMethod]
        public void CheckExistingUser2()
        {
            //arrange
            var list_of_users = new List<User>();
            setArrangeListOfUsers(ref list_of_users);
            User u1 = new User() { FirstName = "Adam", LastName = "Kowalski", City = "Warszawa", Pesel = "55122952416" };

            bool conditionBeforeAddUser = CheckConditionOfUserExist(ref list_of_users, u1);
            bool condition = User.UserExists(ref list_of_users, u1);
            bool conditionAfterAddUser = CheckConditionOfUserExist(ref list_of_users, u1);


            //Assert
            Assert.IsTrue(condition);
            Assert.IsTrue(conditionBeforeAddUser);
            Assert.IsTrue(conditionAfterAddUser);
        }
        ////////////////////////////////////////////////////////////////////////////
        /// check method equals
        [TestMethod]
        public void CheckMethodEquals()
        {
            //arrange
            User user =new User() { FirstName = "Adam", LastName = "Kowalski", City = "Warszawa", Pesel = "55122952416" };
            User user1= new User() { FirstName = "Adam", LastName = "Kowalski", City = "Warszawa", Pesel = "55122952416" };
            User user2= new User() { FirstName = "Jan", LastName = "Nowak", City = "Warszawa", Pesel = "71052429624" };
            Object obj = new Object();

            /// equals
            bool conditionEquals = user.Equals(user1);

            /// not equals
            bool conditionNotEquals = user.Equals(user2);


            //Assert
            Assert.IsTrue(conditionEquals);
            Assert.IsFalse(conditionNotEquals);

            /// throw exception - incorrect comparing object 
            Assert.ThrowsException<Exception>(() => user.Equals(obj));

        }

    }
}