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

namespace Registration_Form
{
    public partial class formregistration : Form
    {
        string filename;
        string foldername;
        bool directoryset, filenameset;
        FolderBrowserDialog folderBrowserDialog1;
        public formregistration()
        {
            InitializeComponent();
        }
        void msgBoxPerformClick(Button bt, String msg)
        {
            DialogResult result = MessageBox.Show(msg, "Alert", MessageBoxButtons.YesNo);
            if (result == DialogResult.Yes)
            {
                bt.PerformClick();
            }
            else
            {
                throw new Exception();
            }
        }

        private void btregister_Click(object sender, EventArgs e)
        {
            try
            {
                if (!directoryset)
                {
                    msgBoxPerformClick(btsetdir, "Directory missng, Do you want to set it now?");

                }
                else if (!filenameset)
                {
                    msgBoxPerformClick(btautoname, "File Name missing, Do you want to generate file name?");
                }
                else
                {

                    foreach (Control c in this.Controls) //check if theres an empty field
                    {
                        if (c is TextBox)
                        {
                            TextBox textBox = c as TextBox;
                            if (textBox.Text == string.Empty)
                            {
                                MessageBox.Show("There's an empty field.");
                                throw new Exception();
                            }
                        }
                    }

                    foldername = folderBrowserDialog1.SelectedPath;
                    foldername = Path.Combine(foldername, filename);
                    if (File.Exists(foldername)) //replaces the file that has the same file name
                    {
                        DialogResult result = MessageBox.Show("File Name already exist, Replace the existing File?", "Alert", MessageBoxButtons.YesNo);
                        if (result == DialogResult.Yes)
                        {
                            File.Delete(foldername);
                        }
                        else
                        {
                            throw new Exception();
                        }
                    }
                    using (FileStream fs = File.Create(foldername))
                    {
                        Byte[] title = new UTF8Encoding(true).GetBytes("Student No: " + tbstudentno.Text
                            + "\nFull Name: " + tbln.Text + ", " + tbfn.Text + " " + tbmi.Text +
                            "\nProgram: " + cbprogram.SelectedItem + "\nSex: " + cbgender.SelectedItem + "\nAge: "
                            + tbage.Text + "\nBirthday: " + dtpbday.Text + "\nContact No.: " + tbcontactno.Text);
                        fs.Write(title, 0, title.Length);
                    }
                    MessageBox.Show(filename + " has been written in " + foldername);
                }
            }
            catch (Exception a)
            {
            }
        }


        private void button1_Click(object sender, EventArgs e)
        {
            foldername = "";
                folderBrowserDialog1 = new FolderBrowserDialog();
                DialogResult result = folderBrowserDialog1.ShowDialog();
                if (result == DialogResult.OK)
                {
                    foldername = folderBrowserDialog1.SelectedPath;
                    directoryset = true;
                }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            filename = "";
            var textBoxCollection = new[] { tbfn, tbln, tbstudentno };
            bool checkEmpty = textBoxCollection.Any(t => String.IsNullOrWhiteSpace(t.Text));

            if (!checkEmpty)
            {
                if (tbfilename.Text.Length == 0)
                {
                    filename = tbstudentno.Text + "_" + tbln.Text + "_" + tbfn.Text;
                    tbfilename.Text = filename;
                    filename = filename.Insert(filename.Length, ".txt");

                }
                else
                {
                    filename = tbfilename.Text;
                    filename = filename.Insert(filename.Length, ".txt");
                    MessageBox.Show("File Name has been set.", "Alert");
                }
            }
            else
            {
                MessageBox.Show("One of the 3 TextBox are empty, First & Last Name and Student Number.", "Error");
            }
            filenameset = true;
        }
        private void tbstudentno_TextChanged(object sender, EventArgs e)
        {
            tbfilename.Text = "";
        }
    }
}