using Ophelias.Expressions;
using Ophelias.Managers;
using Ophelias.Models;
using Ophelias.Reporting;
using System.Data.SQLite;

internal class Program
{
    private static string GetGuestEmail()
    {
        Console.Write("Specify email: ");
        string Email = "";
        while (!Validation.ValidateEmail(Email))
        {
            Email = Console.ReadLine();
            if (!Validation.ValidateEmail(Email))
            {
                Console.Write("Please enter a valid email: ");
            }
        }
        return Email;
    }

    private static void GuestMode()
    {
        Reservation? activeReservation = null;
        Guest? activeGuest = null;
        void help()
        {
            Console.WriteLine(
                "Reservation Commands:\n" +
                "\treservation create - Create a new reservation.\n" +
                "\treservation update - Update your active reservation.\n" +
                "\treservation cancel - Cancel a reservation.\n" +
                "Account Commands:\n" +
                "\taccount create - Create a new guest account.\n" +
                "\taccount update - Update your account information.\n" +
                "\taccount login - Log into your guest account." +
                "Enter Q to quit.\n"
            );
            return;
        }

        (string?, string?, string?) GetCreditCardInformation()
        {
            Console.Write("What is your credit card number: ");
            string CreditCard = "";
            while (!Validation.ValidateCreditCard(CreditCard))
            {
                CreditCard = Console.ReadLine().Trim().Replace("\t", "");
                if (CreditCard == "q" || CreditCard == "Q")
                {
                    return (null, null, null);
                }

                if (!Validation.ValidateCreditCard(CreditCard))
                {
                    Console.Write("Please enter a valid credit card. If your card is expired, enter Q to cancel: ");
                }
            }
            Console.Write("What is your credit card expiration date (MM/yy): ");
            string CardExpiration = "";
            while (!Validation.ValidateExpirationDate(CardExpiration))
            {
                CardExpiration = Console.ReadLine().Trim().Replace("\t", "");
                if (CardExpiration == "q" || CardExpiration == "Q")
                {
                    return (null, null, null);
                }

                if (!Validation.ValidateExpirationDate(CardExpiration))
                {
                    Console.Write("Please enter a valid expiration date. If your card is expired, enter Q to cancel: ");
                }
            }
            Console.Write("What is your credit card CCV: ");
            string CCV = "";
            while (!Validation.ValidateCCV(CCV))
            {
                CCV = Console.ReadLine().Trim().Replace("\t", "");
                if (CCV == "q" || CCV == "Q")
                {
                    return (null, null, null);
                }

                if (!Validation.ValidateCCV(CCV))
                {
                    Console.Write("Please enter a valid credit card CCV. If your card is expired, enter Q to cancel: ");
                }
            }
            return (CreditCard, CardExpiration, CCV);
        }
        (string, string) GetGuestName()
        {
            Console.Write("What is your first name: ");
            string FirstName = "";
            while (FirstName.Length == 0)
            {
                FirstName = Console.ReadLine();
                if (FirstName == "")
                {
                    Console.Write("What is your first name: ");
                }
            }
            Console.Write("What is your last name: ");
            string LastName = "";
            while (LastName.Length == 0)
            {
                LastName = Console.ReadLine();
                if (LastName == "")
                {
                    Console.Write("What is your last name: ");
                }
            }
            return (FirstName, LastName);
        }
        void GuestLogin()
        {
            Console.Write("\nEnter your email address: ");
            string email = "";
            while (!Validation.ValidateEmail(email))
            {
                email = Console.ReadLine();
                if (!Validation.ValidateEmail(email))
                {
                    Console.Write("Please enter a valid email: ");
                }
            }
            activeGuest = Hotel.GetGuestByEmail(email);
            if (activeGuest == null)
            {
                Console.WriteLine($"\nNo account was found with the email {email}.");
                return;
            }
            Console.WriteLine($"\nYou have logged into {activeGuest.FirstName} {activeGuest.LastName} ({email}).");
            activeReservation = Hotel.GetResByGuest(activeGuest);
        }
        void CreateNewGuestPrompt()
        {
            (string FirstName, string LastName) = GetGuestName();
            string Email = GetGuestEmail();
            Console.Write("Would you like to enter your credit card details? (Y/n): ");
            string? CreditCard = null;
            string? CardExpiration = null;
            string? CCV = null;
            while (true)
            {
                string input = Console.ReadLine();
                if (input.Equals("y") || input.Equals("Y"))
                {
                    (CreditCard, CardExpiration, CCV) = GetCreditCardInformation();
                    break;
                }
                else if (input.Equals("n") || input.Equals("N"))
                {
                    break;
                }
                else
                {
                    Console.Write("Input must be Y, y or N, n: ");
                }
            }

            activeGuest = new(FirstName, LastName, Email, CreditCard: CreditCard, Expiration: CardExpiration, CCV: CCV);
            Console.Write($"You are now logged in as {FirstName} {LastName} ({Email})");
        }
        void UpdateGuestInformation()
        {
            if (activeGuest == null)
            {
                Console.WriteLine("No guest is currently logged in, please login.");
                return;
            }

            string? NewFname = null, NewLname = null, NewEmail = null, NewCard = null, NewExpiry = null, NewCCV = null;

            void SavePrompt()
            {
                if (NewFname == null && NewLname == null && NewEmail == null && NewCard == null && NewExpiry == null && NewCCV == null)
                {
                    Console.WriteLine("No changes have been made.");
                    return;
                }
                string changes = "";
                List<string> NewDetails = new();
                if (!string.IsNullOrEmpty(NewFname))
                {
                    NewDetails.Add($"\tFirst Name: {activeGuest.FirstName} -> {NewFname}");
                    activeGuest.FirstName = NewFname;
                }
                if (!string.IsNullOrEmpty(NewLname))
                {
                    NewDetails.Add($"\tLast Name: {activeGuest.LastName} -> {NewLname}");
                    activeGuest.LastName = NewLname;
                }
                if (!string.IsNullOrEmpty(NewEmail))
                {
                    NewDetails.Add($"\tEmail: {activeGuest.Email} -> {NewEmail}");
                    activeGuest.Email = NewEmail;
                }
                if (!string.IsNullOrEmpty(NewCard))
                {
                    NewDetails.Add($"\tCredit Card: {activeGuest.CreditCard} -> {NewCard}");
                    activeGuest.CreditCard = NewCard;
                }
                if (!string.IsNullOrEmpty(NewExpiry))
                {
                    NewDetails.Add($"\tCard Expiration Date: {activeGuest.Expiration} -> {NewExpiry}");
                    activeGuest.Expiration = NewExpiry;
                }
                if (!string.IsNullOrEmpty(NewCCV))
                {
                    NewDetails.Add($"\tCard CCV: {activeGuest.CCV} -> {NewCCV}");
                    activeGuest.CCV = NewCCV;
                }
                if (NewDetails.Count > 0)
                {
                    changes += string.Join("\n", NewDetails);
                }

                Console.WriteLine($"The following changes have been made:\n {changes}");
                activeGuest.UpdateGuest(activeGuest.Id, NewFname, NewLname, NewEmail, NewCard, NewExpiry, NewCCV);
                return;
            }

            Console.WriteLine($"You are currently logged in as {activeGuest.FirstName} {activeGuest.LastName} ({activeGuest.Email}).\n" +
                $"If this is not your account, please (Q)uit and log into your account. Changes will be recorded, but not saved\n" +
                $"until you enter S.\n");

            do
            {
                Console.Write("Please select the option you would like to change or enter S to save:\n" +
                    "1. First Name and Last Name\n" +
                    "2. Email Address\n" +
                    "3. Credit Card Information\n");
                switch (Console.ReadLine())
                {
                    case "Q": return;
                    case "1": (NewFname, NewLname) = GetGuestName(); break;
                    case "2": NewEmail = GetGuestEmail(); break;
                    case "3": (NewCard, NewExpiry, NewCCV) = GetCreditCardInformation(); break;
                    case "S": SavePrompt(); return;
                    default: break;
                }
            } while (true);
        }
        ReservationType SelectReservation()
        {
            string input = "";
            Console.Write("What kind of reservation would you like to make?\n" +
                "1. Conventional\n" +
                "2. Prepaid\n" +
                "3. 60 Day Advance\n" +
                "4. Incentive\n" +
                "Input a number: ");
            while (true)
            {
                input = Console.ReadLine();
                if (input == "1" || input == "2" || input == "3" || input == "4")
                {
                    break;
                }

                Console.Write("Please enter either 1, 2, 3, or 4: ");
            }
            return (ReservationType)(Convert.ToInt32(input) - 1);
        }
        bool CheckReservationRestrictions(DateTime Date, ReservationType Type)
        {
            if (Type == ReservationType.Prepaid)
            {
                if ((int)(Date - DateTime.Now).TotalDays < 90)
                {
                    Console.WriteLine("Prepaid reservations must be made 90 days in advance.");
                }
                else
                {
                    return true;
                }
            }
            else if (Type == ReservationType.SixtyDayAdvance)
            {
                if ((int)(Date - DateTime.Now).TotalDays < 60)
                {
                    Console.WriteLine("Sixty-days-in-advance reservations must be made 60 days in advance.");
                }
                else
                {
                    return true;
                }
            }
            return false;
        }
        (DateTime?, DateTime?) SelectDate(ReservationType Type)
        {

            (DateTime, DateTime) Dates()
            {
                string input = "";
                DateTime _StartDate;
                DateTime _EndDate;
                Console.Write("When would you like to begin your stay.\n" +
                    "Your date input should be in in the following format - yyyy-MM-dd. Example: (2021-12-31)?\n" +
                    "Input a date (2021-12-31): ");
                while (true)
                {
                    input = Console.ReadLine();
                    if (DateTime.TryParse(input, out _StartDate) && _StartDate >= DateTime.Now)
                    {
                        break;
                    }

                    if (_StartDate <= DateTime.Now)
                    {
                        Console.Write("Start date cannot be before current date. Please enter a valid date (2021-12-31): ");
                    }
                    else
                    {
                        Console.Write("Please enter a valid date (2021-12-31): ");
                    }
                }
                Console.Write("When would you like to end your stay.\n" +
                   "Your date input should be in in the following format - yyyy-MM-dd. Example: (2021-12-31)?\n" +
                   "Input a date (2021-12-31): ");
                while (true)
                {
                    input = Console.ReadLine();
                    if (DateTime.TryParse(input, out _EndDate) && _EndDate > _StartDate)
                    {
                        break;
                    }

                    if (_EndDate < _StartDate)
                    {
                        Console.Write("End date must be after start date. Please enter a valid date (2021-12-31): ");
                    }
                    else
                    {
                        Console.Write("Please enter a valid date (2021-12-31): ");
                    }
                }
                return (_StartDate.Date, _EndDate.Date);
            }

            DateTime StartDate;
            DateTime EndDate;
            string input;

            while (true)
            {
                bool maxCapacity = false;
                (StartDate, EndDate) = Dates();
                if (StartDate == null || EndDate == null)
                {
                    (_, maxCapacity) = Hotel.AvgOccupancySpan(StartDate, EndDate);
                }

                if (!maxCapacity)
                {
                    if (!CheckReservationRestrictions(StartDate, Type))
                    {
                        Console.Write("Do you want to quit? Type YES to quit and discard, enter anything or nothing to select another date range.\n" +
                                       ": ");
                        input = Console.ReadLine();
                        if (input == "YES")
                        {
                            Console.WriteLine("Aborting reservation changes.");
                            return (null, null);
                        }
                    }
                    else
                    {
                        break;
                    }
                }
                else
                {
                    Console.WriteLine("Your reservation covers a range where we are already at max capacity, please change your reservation dates.");
                }

            }
            return (StartDate, EndDate);

        }
        void EditReservationPrompt()
        {
            string input;
            DateTime? NewStartDate = activeReservation.StartDate, NewEndDate = activeReservation.EndDate;
            ReservationType NewType = activeReservation.Type;

            bool completed = false;
            do
            {
                Console.Write("What information would you like to edit?\n" +
                    "If not and you wish to cancel, enter Q to exit. If you want to save and complete your changes, enter S.\n" +
                    "1. Reservation type\n" +
                    "2. Reservation dates\n" +
                    "Enter 1 or 2: ");
                input = Console.ReadLine();
                switch (input)
                {
                    case "Q": Console.WriteLine("Changes have has been deleted."); return;
                    case "1": NewType = SelectReservation(); break;
                    case "2": (NewStartDate, NewEndDate) = SelectDate(NewType); break;
                    case "S":
                        if (NewStartDate == null || NewEndDate == null)
                        {
                            return;
                        }

                        while (CheckReservationRestrictions((DateTime)NewStartDate, NewType))
                        {
                            (NewStartDate, NewEndDate) = SelectDate(NewType);
                            if (NewStartDate == null || NewEndDate == null)
                            {
                                return;
                            }
                        }
                        completed = true;
                        (activeReservation.Type, activeReservation.StartDate, activeReservation.EndDate) = (NewType, (DateTime)NewStartDate, (DateTime)NewEndDate);
                        break;
                    default: break;
                }
            } while (!completed);
        }
        void CreateNewReservation()
        {
            if (activeGuest == null)
            {
                Console.WriteLine("No guest is currently logged in, please login.");
                return;
            }
            if (activeReservation != null)
            {
                Console.WriteLine("You currently have an active registration.");
                return;
            }
            if (Hotel.GetBaseRate() == null)
            {
                Console.WriteLine("Unable to proceed with reservation due to no base rate being set. Please inform an employee.");
                return;
            }

            string input;

            ReservationType Type;
            DateTime? StartDate;
            DateTime? EndDate;

            Type = SelectReservation();
            (StartDate, EndDate) = SelectDate(Type);
            if (StartDate == null || EndDate == null)
            {
                Console.WriteLine("Aborting reservation creation.");
                return;
            }

            while ((Type != ReservationType.SixtyDayAdvance &&
                (activeGuest.CreditCard == null || activeGuest.Expiration == null || activeGuest.CCV == null)))
            {
                Console.Write("The reservation type you chose requires you to specify your credit card.\n" +
                    "If you are unable to provide one, enter Q to quit or hit enter to continue.\n" +
                    ": ");
                input = Console.ReadLine();
                if (input == "Q")
                {
                    return;
                }

                GetCreditCardInformation();
            }

            Console.Write($"Thank you for filling out your reservation details. Currently you have made a {Type} " +
                $"reservation and are scheduled to stay from {StartDate.Value.ToString("yyyy-MM-dd")} to {EndDate.Value.ToString("yyyy-MM-dd")}." +
                $"If these details are correct, enter YES to complete. To cancel your reservation enter Q.\n" +
                $": ");
            input = Console.ReadLine();
            while (input != "YES")
            {
                if (input == "Q")
                {
                    Console.WriteLine("Reservation has been deleted.");
                    return;
                }
                else
                {
                    Console.Write("Input must be YES or Q.\n: ");
                    input = Console.ReadLine();
                }
            }
            if (Type == ReservationType.Prepaid)
            {
                activeReservation = new(activeGuest, Type, DateTime.Now.Date, StartDate.Value, EndDate.Value);
                activeReservation.Transaction.Pay(activeReservation.Transaction.Owed);
            }
            else
            {
                activeReservation = new(activeGuest, Type, DateTime.Now.Date, StartDate.Value, EndDate.Value);
            }
            Console.WriteLine("Your reservation has been made.");
        }
        void UpdateReservation()
        {
            string input = "NO";
            if (activeGuest == null)
            {
                Console.WriteLine("No guest is currently logged in, please login.");
                return;
            }
            if (activeReservation == null)
            {
                Console.WriteLine("You currently do not have an active registration.");
                return;
            }

            Console.Write("Your current reservation details are:\n" +
                $"\tStarts on: {activeReservation.StartDate.ToString("yyyy-MM-dd")}\n" +
                $"\tEnds on: {activeReservation.EndDate.ToString("yyyy-MM-dd")}\n");
            DateTime? _StartDate = null, _EndDate = null;
            do
            {
                if (input == "NO")
                {
                    (_StartDate, _EndDate) = SelectDate(activeReservation.Type);
                    if (_StartDate.HasValue && _EndDate.HasValue)
                    {
                        Console.Write("Your new reservation details are:\n" +
                            $"\tStarts on: {activeReservation.StartDate.ToString("yyyy-MM-dd")} -> {_StartDate.Value.ToString("yyyy-MM-dd")}\n" +
                            $"\tEnds on: {activeReservation.EndDate.ToString("yyyy-MM-dd")} -> {_EndDate.Value.ToString("yyyy-MM-dd")}\n");
                    }

                    Console.Write("Are you done with your changes?\n" +
                        "Enter YES to finish and save, NO to continue editing.\n" +
                        ": ");
                }
                else if (input == "Q")
                {
                    Console.WriteLine("Your changes have been discarded.");
                    return;
                }
                else
                {
                    Console.WriteLine("Input must be YES, NO, or Q.");
                    Console.Write(": ");
                }
                input = Console.ReadLine();
            } while (input != "YES");
            if (_StartDate != null && _EndDate != null)
            {
                activeReservation.ChangeReservationDates((DateTime)_StartDate, (DateTime)_EndDate);
                Console.WriteLine("Your changes have been saved.");
            }
            return;
        }
        void CancelReservation()
        {
            if (activeGuest == null)
            {
                Console.WriteLine("No guest is currently logged in, please login.");
                return;
            }
            if (activeReservation == null)
            {
                Console.WriteLine("You currently do not have an active registration.");
                return;
            }
            string input;
            Console.Write("Would you like to cancel your reservation?\n" +
                "You may be charged depending on your reservation.\n" +
                "Enter YES to confirm or NO to exit: ");
            input = Console.ReadLine();
            while (input != "YES")
            {
                if (input == "NO")
                {
                    Console.Write("Reservation has not been cancelled.");
                    return;
                }
                else
                {
                    Console.Write("Your input must be YES or NO: ");
                    Console.ReadLine();
                }
            }
            activeReservation.CancelReservation();
            activeReservation = null;
            Console.Write("Reservation has been cancelled, you may be charged based on your reservation.");
        }
        Console.Write(
                "\nWelcome to the Ophelias Oasis Hotel Registration System!\n" +
                "Type help to get a full list of commands or enter a command.\n" +
                "Command: "
        );
        while (true)
        {

            string? input = Console.ReadLine();
            switch (input)
            {
                case "help": help(); break;
                case "reservation create": CreateNewReservation(); break;
                case "reservation update": UpdateReservation(); break;
                case "reservation cancel": CancelReservation(); break;
                case "account create": CreateNewGuestPrompt(); break;
                case "account update": UpdateGuestInformation(); break;
                case "account login": GuestLogin(); break;
                case "q": return;
                default: Console.WriteLine("Unknown command, enter help for more inforamtion."); break;
            }
            Console.Write("\nCommand: ");
        }
    }
    private static void AdminMode()
    {
        void help()
        {
            Console.WriteLine(
                "Report Commands:\n" +
                "\tgenerate management report - Generates a daily management report on expected occupancy, room income, and incentive losses.\n" +
                "\tgenerate operational report - Generates a report of daily arrivals and occupancy.\n" +
                "\tgenerate accommodation bills - Generates an accommodation bill that will be handed to guests upon checkout.\n" +
                "\treservation cancel\n" +
                "Management Commands:" +
                "\nnotify pending payments - Generates and emails 60 day advance reservations that they must pay for their reservation or it will be cancelled." +
                "\nissue penalties - Issues penalties for guests that are no shows." +
                "\tcheckin guest - Checks in a guest and assigns them a room.\n" +
                "\tcheckout guest - Checks out a guest and removes their room assignment.\n" +
                "\tset rate - Sets a new base rate to begin after a specified date.\n" +
                "Enter Q to quit.\n"
            );
            return;
        }

        void SetFutureBaseRate()
        {
            bool SetRatePrompt(DateTime? FixedDate = null)
            {
                string input;
                string amount;
                amount = Console.ReadLine();
                if (Validation.ValidateMoney(amount))
                {
                    Console.Write($"Is this the correct base rate {amount}?\n" +
                        $"Enter YES or NO: ");
                    input = Console.ReadLine();
                    while (input != "YES")
                    {
                        if (input == "NO")
                        {
                            break;
                        }
                        else
                        {
                            Console.Write("Input must be YES or NO: ");
                        }
                        input = Console.ReadLine();
                    }
                    if (input == "YES")
                    {
                        if (FixedDate != null)
                        {
                            if (Hotel.GetBaseRateByDate((DateTime)FixedDate))
                            {
                                Console.Write("There is already a base rate configured for this date.\n" +
                                    "If you are entering a new rate because one was not configured and got this error, type YES.\n" +
                                    "Would you like to overwrite it (YES)? If not enter anything to continue.\n" +
                                    ": ");
                                if (Console.ReadLine() == "YES")
                                {
                                    Hotel.UpdateBaseRate(Convert.ToDouble(amount), FixedDate.Value.Date, DefaultRate: true);
                                    return true;
                                }
                            }
                            else
                            {
                                Hotel.SetBaseRate(Convert.ToDouble(amount), (DateTime)FixedDate, true);
                            }

                            Console.WriteLine($"A base rate of {amount} has been set and will take effect immediately.");
                        }
                        else
                        {
                            DateTime StartDate;
                            Console.Write("When would you like the new rate to take effect.\n" +
                                "Your date input should be in in the following format - yyyy-MM-dd. Example: (2021-12-31)?\n" +
                                "Input a date (2021-12-31): ");
                            while (true)
                            {
                                input = Console.ReadLine();
                                if (DateTime.TryParse(input, out StartDate))
                                {
                                    if (StartDate.Date <= DateTime.Now.Date)
                                    {
                                        Console.WriteLine("Base rate must be configured for a future night. Not the same day or past.");
                                    }
                                    else if (Hotel.GetBaseRateByDate(StartDate))
                                    {
                                        Console.Write("There is already a base rate configured for this date.\n" +
                                            "Would you like to overwrite it (YES)? If not enter anything to continue." +
                                            ": ");
                                        if (Console.ReadLine() == "YES")
                                        {
                                            Hotel.UpdateBaseRate(Convert.ToDouble(amount), StartDate.Date);
                                            return true;
                                        }
                                    }
                                    else
                                    {
                                        break;
                                    }
                                }

                                Console.Write("Please enter a valid date (2021-12-31): ");
                            }
                            Hotel.SetBaseRate(Convert.ToDouble(amount), StartDate);
                            Console.WriteLine($"A base rate of {amount} has been set and will take effect on {DateTime.Now.Date.ToString("yyyy-MM-dd")}.");
                        }
                        return true;
                    }
                }
                else
                {
                    Console.WriteLine("Your input was not a valid input, an example of a valid input would be 100 or 100.00.");
                }
                Console.Write("Enter new rate: ");
                return false;
            }

            if (Hotel.GetBaseRate() == null)
            {
                Console.Write("No base rate has been configured. " +
                    "You must set one for the current date.\n" +
                    "Enter new rate: ");
                while (!SetRatePrompt(DateTime.Now.Date)) { }
            }
            else
            {
                Console.Write("What is the value of the rate you would like to set.\n" +
                   "Enter new rate: ");
                while (!SetRatePrompt()) { }
            }
        }
        void CheckIn()
        {
            string Email = GetGuestEmail();
            TimeRefs? status = Hotel.CanBeCheckedIn(Email);
            Guest? g = Hotel.GetGuestByEmail(Email);
            if (g == null)
            {
                Console.WriteLine("No guest with that email exists.");
                return;
            }
            if (!status.HasValue)
            {
                Console.WriteLine("No reservation exists for this email.");
                return;
            }

            if (status.Value == TimeRefs.OnTime)
            {
                int? RoomID = Hotel.CheckInGuest(Email, DateTime.Now.Date);
                if (RoomID != null)
                {
                    Console.WriteLine($"Guest has been checked in, their room number is {RoomID}.");
                }
            }
            else if (status.Value == TimeRefs.Late)
            {
                Console.WriteLine("Since the reservation was not checked in on the date scheduled, it has been cancelled. The guest will be charged the \"no show\" penalty.");
                Reservation? r = Hotel.GetResByGuest(g);

                if (r == null)
                {
                    throw new Exception();
                }

                r.CancelReservation();

            }
            else if (status.Value == TimeRefs.Early)
            {
                Console.WriteLine("Since the reservation was not checked in on the date scheduled, it has been cancelled. The guest will be charged the \"no show\" penalty.");
            }
            return;
        }
        void CheckOut()
        {
            string Email = GetGuestEmail();
            if (Hotel.GuestCurrentlyCheckedIn(Email))
            {
                Reservation r = Hotel.GetResByGuest(Hotel.GetGuestByEmail(Email));
                if (r.Type == ReservationType.Incentive || r.Type == ReservationType.Conventional)
                {
                    r.Transaction.Pay(r.Transaction.Owed);
                }

                Hotel.CheckOutGuest(Email, DateTime.Now.Date);
                Console.WriteLine($"Guest has been checked out.");
            }
            else
            {
                Console.WriteLine($"Can't checkout a guest that hasn't been checked in.");
            }
            return;
        }
        void NotifyOutstandingPayments()
        {
            List<Reservation> activeSixtyRes = Hotel.GetActiveSixtyDayRes();
            foreach (Reservation r in activeSixtyRes)
            {
                int days = (int)(r.StartDate.Date - DateTime.Now.Date).TotalDays - 30;
                if (days < 0)
                {
                    r.CancelReservation();
                }
                else if (days <= 15)
                {
                    Email e = new(r.Guest.Email);
                    e.Send();
                }
            }
            if (File.Exists("Emails.txt"))
            {
                FileInfo f = new("Emails.txt");
                Console.WriteLine($"Emails have been written and appended to {f.FullName}");
            }
        }
        void GenerateManagementReports()
        {
            var w = Hotel.GetExpectedOccupancyCount();
            Management.CalculateExpectedOccupancy(w.Item2, w.Item1);
            if (File.Exists("ExpectedOccupancy.txt"))
            {
                FileInfo f = new("ExpectedOccupancy.txt");
                Console.WriteLine($"Expected occupancy has been written and appended to {f.FullName}");
            }
            var x = Hotel.GetExpectedIncomeCount();
            Management.CalculateExpectedIncome(x.Item1, x.Item2, x.Item3);
            if (File.Exists("ExpectedIncome.txt"))
            {
                FileInfo f = new("ExpectedIncome.txt");
                Console.WriteLine($"Expected income has been written and appended to {f.FullName}");
            }
            var y = Hotel.GetIncentiveTransactions();
            Management.CalculateIncentiveLosses(y.Item3, y.Item1, y.Item2);
            if (File.Exists("IncentiveLosses.txt"))
            {
                FileInfo f = new("IncentiveLosses.txt");
                Console.WriteLine($"Incentive losses have been written and appended to {f.FullName}");
            }
        }
        void GenerateAccommodationBills()
        {
            List<Reservation> reservations = Hotel.GetDailyArrivals();
            Accommodation.GenerateAccommodationBills(reservations);

            if (File.Exists("AccommodationBills.txt"))
            {
                FileInfo f = new("AccommodationBills.txt");
                Console.WriteLine($"Accommodation bills have been written and appended to {f.FullName}");
            }
        }
        void GenerateOperationalReports()
        {
            List<Reservation> reservations = Hotel.GetDailyArrivals();
            Operational.FetchDailyArriavals(reservations);
            if (File.Exists("DailyArrivals.txt"))
            {
                FileInfo f = new("DailyArrivals.txt");
                Console.WriteLine($"Daily arrivals have been written and appended to {f.FullName}");
            }
            var x = Hotel.GetDailyOccupancy();
            Operational.FetchDailyOccupancy(x.Item1, x.Item2);
            if (File.Exists("DailyOccupancy.txt"))
            {
                FileInfo f = new("DailyOccupancy.txt");
                Console.WriteLine($"Daily occupancy has been written and appended to {f.FullName}");
            }
        }

        Console.Write(
        "\nWelcome to the Ophelias Oasis Hotel Management System!\n" +
        "Type help to get a full list of commands or enter a command.\n" +
        "Command: ");
        while (true)
        {

            string? input = Console.ReadLine();
            switch (input)
            {
                case "help": help(); break;
                case "generate management report": GenerateManagementReports(); break;
                case "generate operational report": GenerateOperationalReports(); break;
                case "generate accommodation bills": GenerateAccommodationBills(); break;
                case "notify pending payments": NotifyOutstandingPayments(); break;
                case "issue penalties": break;
                case "checkin guest": CheckIn(); break;
                case "checkout guest": CheckOut(); break;
                case "set rate": SetFutureBaseRate(); break;
                case "Q": return;
                default: Console.WriteLine("Unknown command, enter help for more inforamtion."); break;
            }
            Console.Write("\nCommand: ");
        }

    }

    private static void Main()
    {
        if (!File.Exists("database.sqlite3") || new FileInfo("database.sqlite3").Length == 0)
        {
            SQLiteConnection.CreateFile("database.sqlite3");
            using (Database Manager = new())
            {
                Manager.InitializeTables();
                Manager.InitializeRoomsTable();
            }
        }
        if (!Hotel.CheckBaseRate())
        {
            Console.WriteLine("No base rate is configured. As a result reservations cannot be made until one is configured.");
        }

        bool run = true;
        while (run)
        {
            Console.Write(
                "Are you an employee or customer?\n" +
                "1. Employee\n" +
                "2. Customer/ Guest\n" +
                ": "
            );
            switch (Console.ReadLine().ToUpper())
            {
                case "1": AdminMode(); break;
                case "2": GuestMode(); break;
                case "Q": run = false; break;
                default: Console.WriteLine("You must either specify 1 for Employee, 2 for Customer/ Guest, or Q to quit.\n\n"); break;
            }
        }
    }
}