<?php
header('Content-Type: application/json');
require_once __DIR__ . '/../db/config.php';

$method = $_SERVER['REQUEST_METHOD'];
$db = db();

switch ($method) {
    case 'GET':
        if (isset($_GET['id'])) {
            $stmt = $db->prepare("SELECT * FROM notes WHERE id = ?");
            $stmt->execute([$_GET['id']]);
            echo json_encode($stmt->fetch());
        } else {
            $stmt = $db->query("SELECT * FROM notes ORDER BY created_at DESC");
            echo json_encode($stmt->fetchAll());
        }
        break;

    case 'POST':
        $data = json_decode(file_get_contents('php://input'), true);
        if (isset($data['id']) && $data['id']) {
            // Update
            $stmt = $db->prepare("UPDATE notes SET title = ?, content = ? WHERE id = ?");
            $stmt->execute([$data['title'], $data['content'], $data['id']]);
            echo json_encode(['success' => true]);
        } else {
            // Create
            $stmt = $db->prepare("INSERT INTO notes (title, content) VALUES (?, ?)");
            $stmt->execute([$data['title'], $data['content']]);
            echo json_encode(['success' => true, 'id' => $db->lastInsertId()]);
        }
        break;

    case 'DELETE':
        $data = json_decode(file_get_contents('php://input'), true);
        $stmt = $db->prepare("DELETE FROM notes WHERE id = ?");
        $stmt->execute([$data['id']]);
        echo json_encode(['success' => true]);
        break;
}