<?php
require_once '../config.php';
require_once '../vendor/autoload.php';

use Firebase\JWT\JWT;
use Firebase\JWT\Key;

header('Content-Type: application/json');
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: GET, POST');
header('Access-Control-Allow-Headers: Content-Type, Authorization');

// Vérification du token JWT
function verify_token() {
    $headers = getallheaders();
    if (!isset($headers['Authorization'])) {
        http_response_code(401);
        echo json_encode(['message' => 'Token manquant']);
        exit();
    }
    $token = str_replace('Bearer ', '', $headers['Authorization']);
    try {
        return JWT::decode($token, new Key(JWT_SECRET, 'HS256'));
    } catch (Exception $e) {
        http_response_code(401);
        echo json_encode(['message' => 'Token invalide']);
        exit();
    }
}

verify_token();

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

// Récupérer l'action demandée
$action = $_GET['action'] ?? '';

if ($action === 'users') {
    // GET — Récupérer tous les utilisateurs
    if ($method === 'GET') {
        $result = $db->query("SELECT id, username FROM users");
        $data = [];
        while ($row = $result->fetch_assoc()) {
            $data[] = $row;
        }
        echo json_encode($data);

        // POST — Ajouter un utilisateur
    } elseif ($method === 'POST') {
        $body = json_decode(file_get_contents('php://input'), true);
        $stmt = $db->prepare("INSERT INTO users (username, password) VALUES (?, ?)");
        $stmt->bind_param("ss", $body['username'], $body['password']);
        $stmt->execute();
        http_response_code(201);
        echo json_encode(['message' => 'Utilisateur ajouté avec succès']);
    }

} elseif ($action === 'thresholds') {
    // GET — Récupérer les seuils
    if ($method === 'GET') {
        $result = $db->query("SELECT * FROM thresholds");
        $data = [];
        while ($row = $result->fetch_assoc()) {
            $data[] = $row;
        }
        echo json_encode($data);

        // POST — Modifier un seuil
    } elseif ($method === 'POST') {
        $body = json_decode(file_get_contents('php://input'), true);
        $stmt = $db->prepare("INSERT INTO thresholds (sensor, min_value, max_value) VALUES (?, ?, ?) ON DUPLICATE KEY UPDATE min_value=?, max_value=?");
        $stmt->bind_param("sdddd",
            $body['sensor'],
            $body['min_value'],
            $body['max_value'],
            $body['min_value'],
            $body['max_value']
        );
        $stmt->execute();
        echo json_encode(['message' => 'Seuil mis à jour avec succès']);
    }
}

$db->close();
?>