using System;
using libxl;

namespace performance
{      
    class Program
    {
        const int maxRow = 20000;
        const int maxCol = 256;

        static Random rand = new Random();
               
        static string makeString()
        {            
            string s = "";
            for (int i = 0; i < 8; ++i) s += (char)(0x61 + rand.Next(26));
            return s;
        }
                     
        static void test(int number)
        {                
            Console.WriteLine("---------------------------------");
            if (number == 1)
            {
                Console.WriteLine("           strings               ");
            }
            else
            {
                Console.WriteLine("           numbers               ");
            }
            Console.WriteLine("---------------------------------\n");
            
            Book book = new BinBook();                
            Sheet sheet = book.addSheet("Sheet1");

            Console.Write("writing {0:#,###} cells... ", (maxRow - 1) * maxCol);
            DateTime t1 = DateTime.Now;
            
            if (number == 1)
            {
                for (int row = 1; row < maxRow; ++row)
                {
                    for (int col = 0; col < maxCol; ++col)
                    {
                        sheet.writeStr(row, col, makeString());
                    }                        
                }                    
            }
            else
            {                    
                for (int row = 1; row < maxRow; ++row)
                {
                    for (int col = 0; col < maxCol; ++col)
                    {
                        sheet.writeNum(row, col, 1234);
                    }
                }                   
            }
            
            Console.WriteLine("ok");

            DateTime t2 = DateTime.Now;
            TimeSpan d = t2 - t1;
            Console.WriteLine("time: {0} sec", d.TotalSeconds);

            double n = (maxRow - 1) * maxCol / d.TotalSeconds;
            Console.WriteLine("speed: {0:#,###} cells/sec", n);
            Console.WriteLine();

            Console.Write("saving... ");
            
            if (number == 1) {
                book.save("perfstr.xls");
            } else {
                book.save("perfnum.xls");
            }
                                           
            Console.WriteLine("ok");

            DateTime t3 = DateTime.Now;
            Console.WriteLine("time: {0} sec", (t3 - t2).TotalSeconds);
            Console.WriteLine();

            Console.WriteLine("total time: {0} sec", (t3 - t1).TotalSeconds);

            d = t3 - t1;
            n = (maxRow - 1) * maxCol / d.TotalSeconds;
            Console.WriteLine("speed with saving on disk: {0:#,###} cells/sec\n", n);
         
            GC.Collect();
            GC.WaitForPendingFinalizers();
            GC.Collect();        
        }

        static void Main(string[] args)
        {
            try
            {
                test(0);
                test(1);
            }
            catch (System.Exception e)
            {
                Console.WriteLine(e.Message);
            }

            Console.Write("\nPress any key to exit...");
            Console.ReadKey();
        }
    }
}