using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Mail;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;


namespace BTrack
{
    public partial class careers : System.Web.UI.Page
    {
        string otp;
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                Assign_Value();
                Session["OTP"] = null;
            }
        }
        private void Assign_Value()
        {
            txtname.Text = "";
            txtemail1.Text = "";
            txtcontact.Text = "";
            txtmessage.Text = "";
        }


        public static string GenerateOTP()
        {
            Random random = new Random();
            int otp = random.Next(1000, 10000); // Generates a number between 1000 and 9999
            return otp.ToString(); // Converts the number to a string
        }

        public void btnEnterOTP_Click2(object sender, EventArgs e)
        {
            otp = GenerateOTP();
            Session["otp"] = otp;

            sendmail();



        }
        public void btnEnterOTP_Click3(object sender, EventArgs e)
        {

            string enteredOtp = Txtotp.Text;
            if (enteredOtp == Session["OTP"].ToString())
            {
                sendmailtosupport();
            }
            else
            {
                LblErr.Text = "Invalid OTP";
            }


        }
        public void btnsubmit_Click(object sender, EventArgs e)
        {
            if (Txtotp.ToString() == otp)
            {

            }


        }
        private void sendmailtosupport()
        {
              string email = txtemail1.Text;
              if (!IsValidEmail(email))
              {
                  // Show an error message (e.g., set a label text)
                  LblErr.Text = "Please enter a valid email address.";
                  LblErr.Visible = true;
              }
              else
              {
                  if (FileUpload1.HasFile)
                  {
                      if (!string.IsNullOrEmpty(txtemail1.Text) &&
             !string.IsNullOrEmpty(txtcontact.Text) &&
             !string.IsNullOrEmpty(txtname.Text) &&
             !string.IsNullOrEmpty(txtmessage.Text))
                      {
                          try
                          {



                              //string otp = GenerateOTP();
                             // string to = "support@mauli-infotech.co.in";

                              string to = "sanket.mote@mauli-infotech.co.in";

                              string from = "donotreply@mauli-infotech.co.in";
                              string cc = "murlidhar.hambarde@mauli-infotech.co.in";
                              string cc1 = "urmila.jumare@mauli-infotech.co.in";
                              SmtpClient client = new SmtpClient("smtp.gmail.com", 587);
                              client.EnableSsl = true; // Enable SSL/TLS encryption
                              // Gmail account credentials
                              string gmailUsername = "donotreply@mauli-infotech.co.in";
                              string gmailPassword = "kofh lfmm gibd cfnm";


                              // Authenticate with Gmail
                              client.Credentials = new NetworkCredential(gmailUsername, gmailPassword);

                              string msg = "";
                              msg += "Applicant Name :  " + txtname.Text + "\n";
                              msg += "Email ID :  " + txtemail1.Text + "\n";
                              // msg += "Subject  :  " + subject.Text + "";
                              msg += "Message  :  " + txtmessage.Text + "\n";

                              // Create a MailMessage object
                              MailMessage message = new MailMessage(from, to);
                              message.Subject = "Resume From Mauli-Infotech (OPC) Pvt.Ltd. Website";
                              message.Body = "" + msg.ToString() + "";
                              message.CC.Add(cc);
                              message.CC.Add(cc1);
                              // Get the file name and extension
                              string fileName = Path.GetFileName(FileUpload1.FileName);

                              //Attach the file to the email
                              Attachment attachment = new Attachment(FileUpload1.FileContent, fileName);
                              message.Attachments.Add(attachment);


                              client.Send(message);
                              Assign_Value();
                              Session["OTP"] = null;
                              Response.Redirect("thanku.aspx");

                          }
                          catch (Exception ex)
                          {

                          }
                      }
                      else
                      {
                          LblErr.Text = "Please select PDF";

                      }
                  }
              }

        }
        private bool IsValidEmail(string email)
        {
            if (string.IsNullOrEmpty(email))
            {
                return false; // Email is null or empty
            }

            // Regular expression for validating email format
            string emailPattern = @"^[^\s@]+@[^\s@]+\.[^\s@]+$";
            return Regex.IsMatch(email, emailPattern);
        }
        private void sendmail()
        {


            string email = txtemail1.Text;
            if (!IsValidEmail(email))
            {
                // Show an error message (e.g., set a label text)
                LblErr.Text = "Please enter a valid email address.";
                LblErr.Visible = true;
            }
            else
            {
                if (!string.IsNullOrEmpty(txtemail1.Text) &&
               !string.IsNullOrEmpty(txtcontact.Text) &&
               !string.IsNullOrEmpty(txtname.Text) &&
               !string.IsNullOrEmpty(txtmessage.Text))
                {
                    try
                    {
                        //string path = @"C:/CHS/CHSPWD.txt"; // LIVE
                        //string path = @"C:/CHSQAT/CHSPWD.txt";//QAT
                        //string pass="";
                        //string path = @"D:/MI_Applications/CHS/CHSPWD.txt";//Live or local
                        ////string path = @"D:/MI_Applications/CHSQAT/CHSPWD.txt";//QAT
                        //if (File.Exists(path))
                        //{
                        //    if (!string.IsNullOrEmpty(path))
                        //    {
                        //        string[] readText = File.ReadAllLines(path);
                        //        StringBuilder strbuild = new StringBuilder();
                        //        foreach (string s in readText)
                        //        {
                        //            strbuild.Append(s);
                        //        }
                        //        pass = strbuild.ToString();
                        //    }
                        //}
                        //else
                        //{
                        //    pass = "chs";
                        //}


                        string mail = txtemail1.Text;
                        string to = mail;
                        string from = "donotreply@mauli-infotech.co.in";
                        string cc1 = "urmila.jumare@mauli-infotech.co.in";

                        SmtpClient client = new SmtpClient("smtp.rediffmailpro.com", 587)
                        {
                            EnableSsl = true,
                            Credentials = new NetworkCredential("donotreply@mauli-infotech.co.in", "Don#Mauli$005") // Replace with secure handling
                        };

                        // Generate or retrieve the OTP
                        string otp = GenerateOTP(); // Ensure this method is defined and returns a string
                        Session["otp"] = otp; // Store OTP in session

                        // Create the message body
                        string msg = "Welcome to Mauli Infotech (OPC) Pvt. Ltd,'" + txtname + "'\n\n" +
                                     "You are receiving this email because you are verifying your profile on Mauli Infotech (OPC) Pvt. Ltd. " +
                                     "Please enter '" + otp + "' this OTP on the Mauli Infotech (OPC) Pvt. Ltd to verify your email address.\n\n" +
                                     "Best regards,\n";

                        // Create and configure the MailMessage
                        MailMessage message = new MailMessage(from, to)
                        {
                            Subject = "OTP Verification",
                            Body = msg
                        };
                        message.CC.Add(cc1);

                        // Send the email
                        client.Send(message);

                        // Set focus to the OTP textbox
                        Txtotp.Focus();
                        otpMessage.Visible = true;
                        otpdiv.Visible = true;
                        upload.Visible = true;
                    }
                    catch (Exception ex)
                    {
                        // Log or handle the error (e.g., show a message to the user)
                        LblErr.Text = "An error occurred while sending the email: " + ex.Message;
                    }
                }
                else
                {
                    // Handle the case where required fields are empty
                    LblErr.Text = "Please fill in all fields.";
                }
            }
        }
        // Check that all required fields are filled



    }
}