<?php

use Hpz937\BillReminder\Bill\Bill;
use Hpz937\BillReminder\Database\SQLiteAdapter;

require_once __DIR__ . '/../vendor/autoload.php';

session_start();

$request = $_SERVER['REQUEST_URI'];

// Initialize database connection
// $dbConfig = require __DIR__ . '/../config/database.php'; // Assuming you have a config file
$db = new \Hpz937\BillReminder\Database\SQLiteAdapter(); // Or whichever adapter you're using


switch ($request) {
    case '/':
        require __DIR__ . '/../views/home.php';
        break;
    case '/login':
        if ($_SERVER['REQUEST_METHOD'] === 'POST') {
            $username = $_POST['username'] ?? '';
            $password = $_POST['password'] ?? '';
    
            if (empty($username) || empty($password)) {
                $error = 'Username and password are required.';
                require __DIR__ . '/../views/auth/login.php';
                break;
            }
    
            $user = new \Hpz937\BillReminder\User\User($db);
            if ($user->login($username, $password)) {
                header('Location: /dashboard');
                exit;
            } else {
                $error = 'Login failed. Please check your credentials.';
                require __DIR__ . '/../views/auth/login.php';
            }
        } else {
            require __DIR__ . '/../views/auth/login.php';
        }
        break;
        
    case '/register':
        if ($_SERVER['REQUEST_METHOD'] === 'POST') {
            // Extract form data
            $username = $_POST['username'] ?? '';
            $password = $_POST['password'] ?? '';
            $email = $_POST['email'] ?? '';
    
            // Perform validation (basic example)
            if (empty($username) || empty($password) || empty($email)) {
                // Handle validation error
                $error = 'All fields are required.';
                require __DIR__ . '/../views/auth/register.php';
                break;
            }
    
            // Instantiate User class and call register method
            $user = new \Hpz937\BillReminder\User\User($db); // Assume $db is your DatabaseInterface instance
            if ($user->register($username, $password, $email)) {
                // Redirect to login on success
                header('Location: /');
                exit;
            } else {
                // Handle registration error
                $error = 'Registration failed. Please try again.';
                require __DIR__ . '/../views/auth/register.php';
            }
        } else {
            require __DIR__ . '/../views/auth/register.php';
        }
        break;
        
    case '/dashboard':
        if (!isset($_SESSION['user_id'])) {
            header('Location: /login');
            exit;
        }
        require __DIR__ . '/../views/dashboard.php';
        break;
    
    case '/settings':
        if (!isset($_SESSION['user_id'])) {
            header('Location: /login');
            exit;
        }
        require __DIR__ . '/../views/settings.php';
        break;

    case '/api/bills':
        if (!isset($_SESSION['user_id'])) {
            // Return an error response if the user is not logged in
            echo json_encode(['error' => 'Unauthorized']);
            http_response_code(401);
            exit;
        }

        // Initialize your database and Bill class instance
        $db = new SQLiteAdapter();
        $billManager = new Bill($db);

        $userId = $_SESSION['user_id'];
        $bills = $billManager->getBillsByUserId($userId); // Assuming $billManager is your Bill class instance

        // Return the bills as JSON
        header('Content-Type: application/json');
        echo json_encode($bills);
        break;

    case '/api/add-bill':
        if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_SESSION['user_id'])) {
            // Extract bill details from POST data
            $userId = $_SESSION['user_id']; // Assuming you store user ID in session upon login
            $description = $_POST['description'] ?? '';
            $amount = $_POST['amount'] ?? '';
            $dueDate = $_POST['due_date'] ?? '';
    
            // Validate the inputs...
    
            // Insert the bill into the database
            $result = $billManager->addBill($userId, $dueDate, $amount, $description);
    
            if ($result) {
                echo json_encode(['success' => 'Bill added successfully']);
            } else {
                http_response_code(500);
                echo json_encode(['error' => 'Failed to add bill']);
            }
            exit;
        }
        break;

    case '/api/edit-bill':
        if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_SESSION['user_id'])) {
            // Extract bill details and ID from POST data
            $billId = $_POST['id'] ?? '';
            $description = $_POST['description'] ?? '';
            $amount = $_POST['amount'] ?? '';
            $dueDate = $_POST['due_date'] ?? '';
    
            // Validate the inputs and ensure the bill belongs to the logged-in user...
    
            // Update the bill in the database
            $result = $billManager->editBill($billId, $dueDate, $amount, $description);
    
            if ($result) {
                echo json_encode(['success' => 'Bill updated successfully']);
            } else {
                http_response_code(500);
                echo json_encode(['error' => 'Failed to update bill']);
            }
            exit;
        }
        break;
    case '/api/delete-bill':
        if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_SESSION['user_id'])) {
            // Extract bill ID from POST data
            $billId = $_POST['id'] ?? '';
    
            // Validate the ID and ensure the bill belongs to the logged-in user...
    
            // Delete the bill from the database
            $result = $billManager->deleteBill($billId);
    
            if ($result) {
                echo json_encode(['success' => 'Bill deleted successfully']);
            } else {
                http_response_code(500);
                echo json_encode(['error' => 'Failed to delete bill']);
            }
            exit;
        }
        break;
        
    default:
        http_response_code(404);
        echo 'Page not found';
        break;
}