using System;
using System.IO;

namespace IP
{
    class ImageProcessor
    {
        static void ReadPBM(String filePath)
        {
            TextReader tr = null;
            try
            {
                tr = new StreamReader(filePath);
            }
            catch (Exception e)
            {
                Console.WriteLine("Error: File not found.");
            }
            if (tr.ReadLine().Equals("P1")) //Verify that it is a .pbm image
            {
                tr.ReadLine(); //Skip first comment line
                while (tr.Peek().ToString().Equals("#")) //Skip additional comment lines
                {
                    tr.ReadLine();
                }
                string temp = tr.ReadLine();
                string [] heightwidth = temp.Split(' ');
                int height = Convert.ToInt32(heightwidth[1]);
                int width = Convert.ToInt32(heightwidth[0]);
                char[] theImage = new char[height*width];
                Console.WriteLine("Image Width:{0} Image Height:{1}", width, height);
                tr.ReadBlock(theImage, 0, height * width);
                Console.WriteLine("Array Contents:\n{0}", new string(theImage));
            }
            else
            {
                Console.WriteLine("File is not a valid .pbm file.");
            }
            

        }

        static void WritePBM(bool [,] imageArray, String filePath)
        {
            TextWriter tw = new StreamWriter(filePath);

        }

        static void Main(string[] args)
        {
            Console.WriteLine("PBM Image Processor");
            Console.WriteLine("-------------------");
            Console.WriteLine("\n");
            Console.WriteLine("Menu: ");
            Console.WriteLine("1. Read PBM Image");
            Console.WriteLine("2. Write PBM Image");
            Console.WriteLine("Choice: ");
            string choice = Console.ReadLine();
            if(choice.Equals("1"))
            {
                    Console.WriteLine("Name of .pbm file: ");
                    string imagePath = Console.ReadLine();
                    ReadPBM(imagePath);
            }
            else if(choice.Equals("2"))
            {
                    Console.WriteLine("Name of .pbm file:");
                    string imagePath = Console.ReadLine();
                    WritePBM(null, imagePath);
            }
        }

        }
    
}