using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;

namespace Final_PRoject
{
    public partial class Form1 : Form
    {
        StreamReader reader;
        StreamWriter writer;
        int choice;
        public Form1()
        {
            InitializeComponent();
        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            string str = (string)comboBox1.SelectedItem;
            if(str == "Display")
            {
                choice = 1;
            }
            else if(str == "Replace")
            {
                choice = 2;
            }
            else if(str == "Count")
            {
                choice = 3;
            }
            else if(str == "Convert")
            {
                choice = 4;
            }
            else if(str == "Remove Spaces")
            {
                choice = 5;
            }
            else if(str == "Print Sentence")
            {
                choice = 6;
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            reader = new StreamReader(@"C:\Users\Elijah Gulle\Documents\Mapua\1st Year\1st Year, 4th Term\CS128-2\Opn ur ays\Open your Eyes.txt");
            if(choice == 1)
            {
                textBox1.Text = reader.ReadToEnd();
            }
            else if(choice == 2)
            {
                string s = reader.ReadToEnd();
                string s1 = textBox2.Text;
                string s2 = textBox3.Text;
                string s3 = s.Replace(s1, s2);
                textBox1.Text = s3;
            }
            else if(choice == 3)
            {
                string s = reader.ReadToEnd();
                string s1 = textBox2.Text;
                int count = 0;
                int i = 0;
                while((i = s.IndexOf(s1, i)) != -1)
                {
                    i += s1.Length;
                    count++;
                }
                textBox1.Text = "There are " + count.ToString() + " occurences of the specified word in the .txt file";
            }
            else if(choice == 4)
            {
                string s = reader.ReadToEnd();
                s = s.ToUpper();
                textBox1.Text = s;
            }
            else if(choice == 5)
            {
                string s = reader.ReadToEnd();
                string s1 = s.Replace(" ", "");
                textBox1.Text = s1;
            }
            else if(choice == 6)
            {
                textBox1.Clear();
                string searchkeyword = textBox2.Text;
                string[] textlines = File.ReadAllLines(@"C:\Users\Elijah Gulle\Documents\Mapua\1st Year\1st Year, 4th Term\CS128-2\Opn ur ays\Open your Eyes.txt");
                List<string> results = new List<string>();

                foreach (string line in textlines)
                {
                    if(line.Contains(searchkeyword))
                    {
                        results.Add(line);
                        textBox1.Text += line + "\r\n";
                    }
                }
            }
            reader.Close();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            writer = new StreamWriter(@"C:\Users\Elijah Gulle\Documents\Mapua\1st Year\1st Year, 4th Term\CS128-2\Opn ur ays\Open your Eyes Update.txt");
            writer.WriteLine(textBox1.Text);
            MessageBox.Show("File has been saved.");
            writer.Close();
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            textBox1.ScrollBars = ScrollBars.Vertical;
        }
    }
}