<?php
    error_reporting(E_ALL);
    ini_set('display_errors', 1);
    session_start();

    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();
         $teacher_index = $row['teacher_index'];

          $_SESSION['teacher'] = $teacher_name;
          $_SESSION['teacher_index'] = $teacher_index;

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

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

    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();
            $student_index = $row['student_index'];

            $_SESSION['student'] = $student_name;
            $_SESSION['student_index'] = $student_index;

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

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


?>
    <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>