using Diligent.WebAPI.Business.Helper;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Diligent.WebAPI.Tests.Helpers
{
    public class StringGeneratorTests
    {
        [Fact]
        public void GeneratePassword_ShouldReturn_8_Characters_IfOptionsAreNull()
        {
            Assert.Equal(8, StringGenerator.GenerateRandomPassword().Length);
        }

        [Fact]
        public void GeneratePassword_ShouldReturn_4_Characters_IfOptionsDefinedLess()
        {
            Assert.Equal(4, StringGenerator.GenerateRandomPassword(new Microsoft.AspNetCore.Identity.PasswordOptions
            {
                RequiredLength = 3,
                RequiredUniqueChars = 3,
                RequireDigit = true,
                RequireLowercase = true,
                RequireNonAlphanumeric = true,
                RequireUppercase = true
            }).Length);
        }

        [Fact]
        public void GeneratePassword_ShouldReturn_15_Characters_IfOptionsHaveDefinedMinLength()
        {
            Assert.Equal(15, StringGenerator.GenerateRandomPassword(new Microsoft.AspNetCore.Identity.PasswordOptions
            {
                RequiredLength = 15,
                RequiredUniqueChars = 4,
                RequireDigit = true,
                RequireLowercase = true,
                RequireNonAlphanumeric = true,
                RequireUppercase = true
            }).Length);
        }

        [Fact]
        public void GeneratePassword_ShouldContainUppercase_IfOptionsAreNull()
        {
            Assert.Contains(StringGenerator.GenerateRandomPassword(), char.IsUpper);
        }

        [Fact]
        public void GeneratePassword_ShoulContainNumber_IfOptionsAreNull()
        {
            Assert.Contains(StringGenerator.GenerateRandomPassword(), char.IsDigit);
        }

        [Fact]
        public void GeneratePassword_ShouldNotContainNumber_AfterAddingRandomChars()
        {
            Assert.Contains(StringGenerator.GenerateRandomPassword(new Microsoft.AspNetCore.Identity.PasswordOptions
            {
                RequiredLength = 12,
                RequiredUniqueChars = 4,
                RequireDigit = false,
                RequireLowercase = true,
                RequireNonAlphanumeric = true,
                RequireUppercase = false
            }), char.IsDigit);
        }

        [Fact]
        public void GeneratePassword_ShoulContainSpecialChar_IfOptionsAreNull()
        {
            Assert.False(StringGenerator.GenerateRandomPassword().All(char.IsLetterOrDigit));
        }

        [Fact]
        public void GeneratePassword_ShouldContainSpecialChar_IfOptionsAreDefinedToAddRandomChars()
        {
            Assert.False(StringGenerator.GenerateRandomPassword(new Microsoft.AspNetCore.Identity.PasswordOptions
            {
                RequiredLength = 12,
                RequiredUniqueChars = 1,
                RequireDigit = true,
                RequireLowercase = true,
                RequireNonAlphanumeric = false,
                RequireUppercase = true
            }).All(char.IsLetterOrDigit));
        }
    }
}