using System;
using System.IO;
using System.Linq;
using System.Collections.Generic;


namespace Task2
{
    class Program
    {
        static void Main(string[] args)
        {
            List<Customer> listCustomers = new List<Customer>();
            bool exit = false;

            do
            {
                Console.WriteLine("Choose an option:");
                Console.WriteLine("1 - Add some customers");
                Console.WriteLine("2 - See what we have in the list");
                Console.WriteLine("3 - Delete a customer");
                Console.WriteLine("4 - Write all customer info in a file");
                Console.WriteLine("5 - Write data in a file");
                Console.WriteLine("6 - Read data from a file");
                Console.WriteLine("7 - Exit");

                if (int.TryParse(Console.ReadLine(), out int option))
                {
                    switch (option)
                    {

                        case 1:
                            AddToListOfCustomers(listCustomers);
                            break;
                        case 2:
                            PrintListOfCustomers(listCustomers);
                            break;
                        case 3:
                            DeleteACustomer(listCustomers);
                            break;
                        case 4:
                            WriteCustomersInfo(listCustomers);
                            break;
                        case 5:
                            WriteTextDataInMyDocs();
                            break;
                        case 6:
                            ReadTextDataFromMyDocs();
                            break;
                        case 7:
                            exit = true;
                            break;

                    }
                }
            }
            while (!exit);
            Console.WriteLine("You are out!");
        }



        static void AddToListOfCustomers(List<Customer> listCustomers)
        {
            int id = listCustomers.Count > 0 ? listCustomers.Select(c => c.Id).Max() : 0;

            Console.WriteLine("How many customers?");
            int customers = Int32.Parse(Console.ReadLine());

            for (int i = 0; i < customers; i++)
            {
                Customer currentCustomer = new Customer();
                currentCustomer.Id = ++id;

                Console.WriteLine("Name of client №{0}", i + 1);
                currentCustomer.Name = Console.ReadLine();

                Console.WriteLine("Address of client №{0}", i + 1);
                currentCustomer.Address = Console.ReadLine();

                Console.WriteLine("Phone of client №{0}", i + 1);
                currentCustomer.Phone = Console.ReadLine();

                listCustomers.Add(currentCustomer);
            }
        }

        static void PrintListOfCustomers(List<Customer> list)
        {
            foreach (Customer customer in list)
            {
                Console.WriteLine($"-Id {customer.Id}, Name {customer.Name}, Address {customer.Address}, Phone {customer.Phone}");
            }
        }

        static void DeleteACustomer(List<Customer> list)
        {
            Console.WriteLine("Select an Id to delete");
            int id = int.Parse(Console.ReadLine());

            Customer customerToRemove = list.Where(c => c.Id == id).FirstOrDefault();
            list.Remove(customerToRemove);
        }

        static void WriteTextDataInMyDocs()
        {
            Console.WriteLine("Select a name for the file:");
            string fileName = Console.ReadLine();
            string directory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);

            var sw = new StreamWriter($@"{directory}\{fileName}.txt");

            using (sw)
            {
                Console.WriteLine("Press any key to begin and Esc to stop");
                Console.ReadKey(true);

                while (Console.ReadKey(true).Key != ConsoleKey.Escape)
                {
                    sw.WriteLine(Console.ReadLine());
                }
            }

            sw.Close();
        }

        static void ReadTextDataFromMyDocs()
        {
            Console.WriteLine("Select a file to read: ");
            string fileName = Console.ReadLine();
            string directory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);

            var sr = new StreamReader($@"{directory}\{fileName}.txt");

            using (sr)
            {
                Console.WriteLine("Content of file \n");
                Console.WriteLine(sr.ReadToEnd());
            }
        }

        static void WriteCustomersInfo(List<Customer> customers)
        {
            Console.WriteLine("Select a name for the file:");
            string fileName = Console.ReadLine();
            string directory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);

            var sw = new StreamWriter($@"{directory}\{fileName}.txt");

            using (sw)
            {
                foreach (var customer in customers)
                {
                    sw.WriteLine($"-Id {customer.Id}, Name {customer.Name}, Address {customer.Address}, Phone {customer.Phone}");
                }
            }

            sw.Close();

            Console.WriteLine($@"Customer info recorded in {directory}\{fileName}.txt!");
        }
    }

    public class Customer
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public string Address { get; set; }
        public string Phone { get; set; }

    }
}