<?php
include('include/headscript.php');

header('Content-Type: application/json');

$dbHandler = DBHandlerSelect::getInstance();
$pdo = $dbHandler->getConnection();

try {
    // Data richiesta (default oggi). Formato atteso: Y-m-d
    $date = $_GET['date'] ?? date('Y-m-d');
    $d = DateTime::createFromFormat('Y-m-d', $date);
    if (!$d || $d->format('Y-m-d') !== $date) {
        throw new Exception('Data non valida');
    }

    // --- Export per cliente (status = 'l', giornata su export_date) ---
    $stmtC = $pdo->prepare("
        SELECT d.idclient AS idclient,
               COUNT(*)   AS tot
        FROM datadb d
        WHERE d.status = 'l'
          AND DATE(d.export_date) = :d
        GROUP BY d.idclient
        ORDER BY tot DESC
    ");
    $stmtC->execute(['d' => $date]);
    $byClient = $stmtC->fetchAll(PDO::FETCH_ASSOC);

    // --- Risolvi Nominativo cliente dalla cache locale (search_clienti.php) ---
    $clientNames = [];
    $cacheFile = __DIR__ . '/cache/clienti.json';
    if (is_file($cacheFile)) {
        $cache = json_decode(file_get_contents($cacheFile), true);
        foreach (($cache['value'] ?? []) as $c) {
            $clientNames[(int)($c['IdCliente'] ?? 0)] = trim($c['Nominativo'] ?? '');
        }
    }

    // --- Export per utente (status = 'l', giornata su export_date) ---
    $stmtU = $pdo->prepare("
        SELECT d.user_id AS user_id,
               TRIM(CONCAT(COALESCE(u.first_name,''),' ',COALESCE(u.last_name,''))) AS username,
               COUNT(*) AS tot
        FROM datadb d
        LEFT JOIN auth_users u ON u.id = d.user_id
        WHERE d.status = 'l'
          AND DATE(d.export_date) = :d
        GROUP BY d.user_id, username
        ORDER BY tot DESC
    ");
    $stmtU->execute(['d' => $date]);
    $byUser = $stmtU->fetchAll(PDO::FETCH_ASSOC);

    // Normalizza tipi (COUNT torna stringa in PDO)
    foreach ($byClient as &$r) {
        $r['idclient'] = $r['idclient'] !== null ? (int)$r['idclient'] : null;
        $r['tot'] = (int)$r['tot'];
        $nm = $clientNames[$r['idclient']] ?? '';
        $r['clientname'] = $nm !== '' ? $nm : null;
    }
    unset($r);
    foreach ($byUser as &$r) {
        $r['user_id'] = $r['user_id'] !== null ? (int)$r['user_id'] : null;
        $r['tot'] = (int)$r['tot'];
        if (isset($r['username'])) $r['username'] = $r['username'] !== null && $r['username'] !== '' ? $r['username'] : null;
    }
    unset($r);

    // --- Totale export della giornata ---
    $totExport = array_sum(array_column($byClient, 'tot'));

    // --- Campioni totali inseriti nel LIMS per la giornata (tabella lims_daily_samples) ---
    $stmtL = $pdo->prepare("SELECT total_samples FROM lims_daily_samples WHERE sample_date = :d LIMIT 1");
    $stmtL->execute(['d' => $date]);
    $limsSamples = $stmtL->fetchColumn();
    $limsSamples = ($limsSamples !== false) ? (int)$limsSamples : null;

    echo json_encode([
        'success'     => true,
        'date'        => $date,
        'totals'      => ['export' => (int)$totExport],
        'byClient'    => $byClient,
        'byUser'      => $byUser,
        'limsSamples' => $limsSamples,
    ]);
} catch (Exception $e) {
    error_log('Stats export LIMS error: ' . $e->getMessage());
    echo json_encode(['success' => false, 'message' => $e->getMessage()]);
}