//Two Task is require below

​

//1.in ShowValidPlans () method, change method  from void to Return array of plans,

//create a new array store all plans .

//create some rules validation mention above,pass in the  array validate and return the valid plan in ascending order.

//Add a basic error handling.

//pass in below parameters to ShowValidPlans() .

//param1 -  policyholder is not the insured flag(false)

//Param2-  travel start date(2024-03-19)

//Param3 - travel end date (2024-04-19)

//2.Create instance from new class - localTimeClass

//Implement ReturnDate() method ,pass in below Datetime parameter (ApplicationDate)

//2024-03-17T13:18:27.5834001Z (UTC)

//Create logic to convert datetime UTC to Japan Local time zone .

//Next add 2 hour to the Result. 

//Output the result as format (YYYY-MM-DD) .

​

using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

​

interface IDateConvert

{

    string ReturnDate(DateTime appDate);

}

​

public class localTimeClass : IDateConvert

{

    public string ReturnDate(DateTime appDate)

    {

        return TimeZoneInfo.ConvertTimeFromUtc(appDate, TimeZoneInfo.FindSystemTimeZoneById("Tokyo Standard Time")).AddHours(2).ToString("yyyy-MM-dd");

    }

}

​

public class Program

{

    public enum Plans

    {

        CL1 = 0,

        BY1 = 1,

        BY2 = 2,

        AL3 = 3

    }

    public class Plan

    {

        public Plans Name {get; set;}

        public bool PolicyHolderIsInsured { get; set; }

        public int TravelDurationInDays {get; set;}

        public bool IsTravelDurationValidationRequired {get; set;}

        public bool IsTravelDurationGreatherThan {get; set;}

        public bool IsTravelDurationLessThan {get; set;}

        public bool AlwaysShow {get; set;}

        public bool IsEndDateFallOnWeekday {get; set;}

    }

    private static List<Plan> AllPlans = new List<Plan>();

​

    public static void Main()

    {

        //Task1 call ShowValidPlans(param1,param2,param3) & validate the conditions and return a list of arrays  valid Plans and display the results, Expect result display "Plan: BY1,BY2" 

        AllPlans.Add(new Plan

        {

            Name = Plans.BY1,

            PolicyHolderIsInsured = false,

            IsTravelDurationValidationRequired = true,

            IsTravelDurationGreatherThan = false,

            IsTravelDurationLessThan = true,

            TravelDurationInDays = 32,

            AlwaysShow = false

        });

        AllPlans.Add(new Plan

        {

            Name = Plans.BY2,

            PolicyHolderIsInsured = true,

            IsTravelDurationValidationRequired = true,

            IsTravelDurationGreatherThan = false,

            IsTravelDurationLessThan = true,

            TravelDurationInDays = 32

        });

        AllPlans.Add(new Plan

        {

            Name = Plans.CL1,

            AlwaysShow = true

        });

        AllPlans.Add(new Plan

        {

            Name = Plans.AL3,

            IsEndDateFallOnWeekday = true

        });

        DateTime startDate = new DateTime(2024, 03, 19);

        DateTime endDate = new DateTime(2024, 04, 19);

        var validPlans = ShowValidPlans(false,startDate,endDate);

        for (int i = 0; i < validPlans.Length; i++) 

        {

            Console.WriteLine(validPlans[i].Name);

        }

​

        //Task2 Create instance from new class(localTimeClass),call ReturnDate() and show the result                        

        localTimeClass obj = new localTimeClass();

        Console.WriteLine(obj.ReturnDate(new DateTime(2024, 03, 17, 13, 18, 27)));

    }

​

    public static Plan[] ShowValidPlans(bool isNotPolicyholderSameAsInsured, DateTime TravelStartDate, DateTime TravelEndDate)

    {

        //TODO 

        //change method void to array of plans 

        if (TravelStartDate >= TravelEndDate)

        {

            Console.WriteLine("Invalid Start Date.");

            return null;

        }

​

        if (isNotPolicyholderSameAsInsured)

        {

            Console.WriteLine("Policyholder must be the insured one");

            return null;

        }

        var durationDays = (TravelEndDate - TravelStartDate).TotalDays + 1;

        var alwaysShow = true;

​

        return AllPlans.Where(

            p=> (p.AlwaysShow == true && alwaysShow) || 

            (p.IsEndDateFallOnWeekday == true && (TravelEndDate.DayOfWeek.ToString() != "Saturday" && TravelEndDate.DayOfWeek.ToString() != "Sunday")) ||

            (p.PolicyHolderIsInsured == false || (p.PolicyHolderIsInsured == true && p.IsTravelDurationValidationRequired == true && p.IsTravelDurationGreatherThan == true && durationDays > p.TravelDurationInDays)) ||

            (p.PolicyHolderIsInsured == true && p.IsTravelDurationValidationRequired == true && p.IsTravelDurationLessThan == true && durationDays < p.TravelDurationInDays)

        ).ToArray();

    }

}

​