using System;

using System.Collections.Generic;

using System.Text;

using System.IO;

using Newtonsoft.Json;

using System.Linq;

​

namespace examen

{ 

    public  delegate List<string> TextFormatter(List<string> s);/// 3

    public class TextDocument

    {

        public List<string> TextLines { get; set; }

        public char LineSeparator { get; set; }

        public TextFormatter Formatter { get; set; }

        public TextDocument()

        {

            TextLines = new List<string>();

            LineSeparator = '\n';

        }

        public void Format()///3

        {

             this.TextLines = Formatter(TextLines);

        }

        public override string ToString()///1

        {

            StringBuilder s = new StringBuilder();

            List<string> a = this.TextLines;

            foreach (var c in a)

                s.Append(c + this.LineSeparator);

​

            return s.ToString();

        }

        public override bool Equals(Object o)///2

        {

            TextDocument textDocument = new TextDocument();

            if (o != null)

            {

                 textDocument = (TextDocument)o;

            }

            else

            {

                return false;

            }

            List<string> a = this.TextLines;

            List<string> b = textDocument.TextLines;       

              if (a.SequenceEqual(b) && textDocument.LineSeparator == this.LineSeparator &&  this.Formatter.Equals(textDocument.Formatter))

                  return true;       

             return false;

        }

        public void SaveOnDisk()///5

        {

            this.TextLines = this.Formatter(this.TextLines);

            // string filename = ConfigurationManager.AppSettings["File"];

            string filename = string.Empty;

            File.WriteAllText(Path.Combine(filename,"SaveDocument.txt"),this.ToString());

        }

        public void LoadFromDisk()///6

        {

            // string Load = ConfigurationManager.AppSettings["Load"];

            string Load = string.Empty;

            TextDocument t = JsonConvert.DeserializeObject<TextDocument>(Path.Combine(Load,"LoadDocument.txt"));

            this.TextLines = t.TextLines;

            this.LineSeparator = t.LineSeparator;

        }

        public List<string> String()///7

        {

            return this.TextLines.Where(x => x.Length > 100 && x.Where(c => c == ' ').Count() > 10).ToList();

        }

        public override int GetHashCode() {

            return base.GetHashCode();

        }

​

    }

    public class Program

{

    static void Main(string[] args)

        {

            TextDocument t = new TextDocument();

            t.Formatter = new TextFormatter((List<String> text) =>

            {

                List<String> formatted = new List<string>();

                foreach (var line in text)

                {

                    formatted.Add(line.ToUpper());

                }

                return formatted;

            });

​

            t.TextLines.Add("maria");

            t.TextLines.Add("maria1");

            t.TextLines.Add("maria2");

            t.Format();

​

            TextDocument t1 = new TextDocument();

            t1.Formatter = new TextFormatter((List<String> text) =>

            {

                List<String> formatted = new List<string>();

                for (int i = 0; i < text.Count; i++)

                {

                    formatted.Add(i + 1 + "." + text[i].ToUpper());

                }

                return formatted;

            });

​

            t1.TextLines.Add("maria mihai maria maria mihai maria  maria mihai maria  maria mihai maria maria mihai maria maria mihai maria maria mihai maria maria mihai maria maria mihai maria maria mihai maria maria mihai maria maria mihai maria maria mihai maria ");

            t1.TextLines.Add("maria1");

            t1.TextLines.Add("maria2");

            t1.Format();

​

            List<string> a = t1.String();

​

            foreach(var b in a)

                Console.WriteLine(b);

​

            Console.WriteLine(t.Equals(t1) +"\n"+ t1.ToString() + "\n" + t.ToString());

        }

    }

}