<?php
require_once __DIR__ . '/../vendor/autoload.php';
require_once __DIR__ . '/../public/includes/init_praticien.php';

use Google\Client;
use Google\Service\Calendar;
use Google\Service\Calendar\Event;

function envoyerVersGoogleCalendar($praticien_id, $summary, $description, $start_iso, $end_iso = null, $duree_minutes = 60) {
    global $pdo;

    $config = require 'config_google.php';

    // 1. Récupérer le token Google du praticien
    $stmt = $pdo->prepare("SELECT * FROM google_tokens WHERE praticien_id = ?");
    $stmt->execute([$praticien_id]);
    $row = $stmt->fetch();

    if (!$row) {
        error_log("❌ Aucun token trouvé pour praticien ID $praticien_id");
        return false;
    }

    // 2. Préparer le client Google
    $client = new Client();
    $client->setClientId($config['client_id']);
    $client->setClientSecret($config['client_secret']);
    $client->setAccessToken([
        'access_token' => $row['access_token'],
        'expires_in' => 3600,
        'refresh_token' => $row['refresh_token'],
        'created' => $row['expires_at'] - 3600
    ]);

    // 3. Rafraîchir le token si expiré
    if ($client->isAccessTokenExpired()) {
        $client->fetchAccessTokenWithRefreshToken($client->getRefreshToken());

        $new_token = $client->getAccessToken();
        $stmt = $pdo->prepare("UPDATE google_tokens SET access_token = ?, expires_at = ? WHERE praticien_id = ?");
        $stmt->execute([
            $new_token['access_token'],
            time() + $new_token['expires_in'],
            $praticien_id
        ]);
    }

    // 4. Calculer l'heure de fin si elle n'est pas transmise
    if (!$end_iso) {
        $start = new DateTime($start_iso);
        $start->modify("+{$duree_minutes} minutes");
        $end_iso = $start->format(DateTime::ATOM);
    }

    // 🔍 Log pour debug (facultatif)
    error_log("🟢 Google Sync - START: $start_iso");
    error_log("🟢 Google Sync - END  : $end_iso");

    // 5. Préparer le service et l'événement
    $calendar = new Calendar($client);

    $event = new Event([
        'summary'     => $summary,
        'description' => $description,
        'start' => [
            'dateTime' => $start_iso,
            'timeZone' => 'Europe/Paris'
        ],
        'end' => [
            'dateTime' => $end_iso,
            'timeZone' => 'Europe/Paris'
        ]
    ]);

    try {
        $calendar->events->insert('primary', $event);
        return true;
    } catch (Exception $e) {
        error_log("❌ Erreur Google Calendar : " . $e->getMessage());
        return false;
    }
}