<?php
// Load configuration and core classes
$config = require __DIR__ . '/config/database.php';
require_once __DIR__ . '/models/DB.php';

// Load model classes
require_once __DIR__ . '/models/LearnerModel.php';
require_once __DIR__ . '/models/TourModel.php';
require_once __DIR__ . '/models/RegistrationModel.php';

// Load controllers
require_once __DIR__ . '/controllers/LearnerController.php';
require_once __DIR__ . '/controllers/TourController.php';
require_once __DIR__ . '/controllers/RegistrationController.php';
require_once __DIR__ . '/controllers/ReportController.php';

// Create DB connection
$dbConn = new DatabaseModel($config);

// Instantiate models
$learnerModel      = new Learner($dbConn);
$tourModel         = new Tour($dbConn);
$registrationModel = new Registration($dbConn);

// Instantiate controllers
$learnerCtrl      = new LearnerController($learnerModel);
$tourCtrl         = new TourController($tourModel);
$registrationCtrl = new RegistrationController($registrationModel, $learnerModel, $tourModel);
$reportCtrl       = new ReportController($registrationModel, $tourModel, $learnerModel);

// Determine requested section & action
$section = $_GET['section'] ?? '';
$action  = $_GET['action'] ?? 'home';

// Dispatch request
switch ($section) {
    case 'learners':
        $learnerCtrl->handleRequest($action);
        break;
    case 'tours':
        $tourCtrl->handleRequest($action);
        break;
    case 'registrations':
        $registrationCtrl->handleRequest($action);
        break;
    case 'reports':
        $reportCtrl->handleRequest($action);
        break;
    default:
        include __DIR__ . '/view/layouts/main.php';
}