<?php
    if (isset($_POST['submit_teachers'])) {
     $teacher_name = htmlspecialchars($_POST['teacher_name']);
     $teacher_pass = htmlspecialchars(md5($_POST['teacher_pass']));
     $stmt_login = $connect->prepare("SELECT * FROM teachers WHERE username = :teacher_name AND password = :teacher_pass");
     $stmt_login->bindParam(':teacher_name', $teacher_name, PDO::PARAM_STR);
     $stmt_login->bindParam(':teacher_pass', $teacher_pass, PDO::PARAM_STR);
     $stmt_login->execute();

    if ($stmt_login->rowCount() == 1) {
     $row = $stmt_login->fetch();
     $user = $row['username'];
     $pass = $row['password'];
     $teacher_index = $row['teacher_index'];

     if ($user == $teacher_name and $pass == $teacher_pass) {
      $_SESSION['teacher'] = $user;
      $_SESSION['teacher_index'] = $teacher_index;

      $token_rand = md5(uniqid(rand()));
      $_SESSION['token'] = $token_rand;

      header("Location: teachers/index.php");
     }
    }
    else {
       header("Location: index.php?login=error");
    }

    }



    if (isset($_POST['submit_students'])){
     $student_name = htmlspecialchars($_POST['student_name']);
     $student_pass = htmlspecialchars(md5($_POST['student_pass']));

     $stmt_login = $connect->prepare("SELECT * FROM students WHERE username = :student_name AND password = :student_pass");
     $stmt_login->bindParam(':student_name', $student_name, PDO::PARAM_STR);
     $stmt_login->bindParam(':student_pass', $student_pass, PDO::PARAM_STR);
     $stmt_login->execute();


    if($stmt_login->rowCount() == 1) {
     $row = $stmt_login->fetch();
     $user = $row['username'];
     $pass = $row['password'];
     $student_index = $row['student_index'];

     if($user == $student_name and $pass == $student_pass) {
      $_SESSION['student'] = $user;
      $_SESSION['student_index'] = $student_index;

      $token_rand = md5(uniqid(rand()));
      $_SESSION['token'] = $token_rand;

      header("Location: students/index.php");
     }
    }
    else {
       header("Location: index.php?login=error");
    }

    }


    ?>
    <br>

    <center>
        <h2>Welcome to School Management System</h2>
        <button class="button" data-toggle="modal" data-target="#TeacherLogin" ><span>Teacher </span></button>
        <button class="button" data-toggle="modal" data-target="#StudentLogin"><span>Student </span></button>
    </center>

        <!-- Teacher Login Form -->

    <div class="modal fade" id="TeacherLogin" tabindex="-1" role="dialog" aria-labelledby="TeacherLogin" aria-hidden="true" style="display: none;">
              <div class="modal-dialog">
                    <div class="loginmodal-container">
                            <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
                            <hr>
                        <h1>Welcome to Teacher Login</h1><br>
                      <form id="login_teacher" action="" method="post">
                        <input type="text" name="teacher_name" class = "validate[required]" placeholder="<?php echo $language['username']; ?>"/>
                        <input type="password" name="teacher_pass" class = "validate[required]" placeholder="<?php echo $language['password']; ?>"/>
                        <input type="submit" name="submit_teachers" class="login loginmodal-submit" value="<?php echo  $language['login']?>"/>
                      </form>
                      <div class="login-help">
                        <a href="#">Forgot Password</a>
                      </div>
                      <hr>
                    </div>

                </div>
              </div>


     <!-- Student Login Form -->


       <div class="modal fade" id="StudentLogin" tabindex="-1" role="dialog" aria-labelledby="StudentLogin" aria-hidden="true" style="display: none;">
              <div class="modal-dialog">
                    <div class="loginmodal-container">
                            <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
                            <hr>
                        <h1>Welcome to Student Login</h1><br>
                      <form id="login_student" action="" method="post">
                        <input type="text" name="student_name" class = "validate[required]" placeholder="<?php echo $language['username']; ?>"/>
                        <input type="password" name="student_pass" placeholder="<?php echo $language['password']; ?>"/>
                        <input type="submit" name="submit_students" class="login loginmodal-submit" value="<?php echo  $language['login']?>"/>
                      </form>

                      <div class="login-help">
                        <a href="#">Forgot Password</a>
                      </div>
                      <hr>
                    </div>

                </div>
              </div>