<?php
session_start();
require_once 'db.php';

header("Content-Type: application/json");

// Check if the user is authenticated
if (!isset($_SESSION['user_id'])) {
    http_response_code(403);
    echo json_encode(["error" => "Unauthorized access."]);
    exit;
}

$userId = $_SESSION['user_id'];

// Connect to the database
$conn = new mysqli(DB_HOST, DB_USER, DB_PASS, DB_NAME);
if ($conn->connect_error) {
    http_response_code(500);
    echo json_encode(["error" => "Database connection failed."]);
    exit;
}

// Fetch saved responses
$stmt = $conn->prepare("SELECT * FROM questionnaire_responses WHERE user_id = ?");
$stmt->bind_param("i", $userId);
$stmt->execute();
$result = $stmt->get_result();
$response = $result->fetch_assoc();

if ($response) {
    echo json_encode($response);
} else {
    echo json_encode(["message" => "No previous responses found."]);
}

$conn->close();
exit;
?>