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

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

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

try {
    // Mese richiesto (default mese corrente). Formato atteso: Y-m
    $month = $_GET['month'] ?? date('Y-m');
    $dm = DateTime::createFromFormat('Y-m', $month);
    if (!$dm || $dm->format('Y-m') !== $month) {
        throw new Exception('Mese non valido');
    }

    $year = $dm->format('Y');

    // --- Export per cliente (status = 'l', filtro mese) ---
    // tot = numero commesse, parts = numero parti/campioni (+1 per commessa)
    $stmtC = $pdo->prepare("
        SELECT d.idclient AS idclient,
               COUNT(DISTINCT d.iddatadb) AS tot,
               COUNT(ip.id) + COUNT(DISTINCT d.iddatadb) AS parts
        FROM datadb d
        LEFT JOIN identification_parts ip ON ip.iddatadb = d.iddatadb
        WHERE d.status = 'l'
          AND DATE_FORMAT(d.export_date, '%Y-%m') = :m
        GROUP BY d.idclient
        ORDER BY parts DESC
    ");
    $stmtC->execute(['m' => $month]);
    $byClient = $stmtC->fetchAll(PDO::FETCH_ASSOC);

    // --- Risolvi Nominativo cliente dalla cache locale ---
    $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', filtro mese) ---
    // tot = numero commesse, parts = numero parti/campioni (+1 per commessa)
    $stmtU = $pdo->prepare("
        SELECT d.user_id AS user_id,
               TRIM(CONCAT(COALESCE(u.first_name,''),' ',COALESCE(u.last_name,''))) AS username,
               COUNT(DISTINCT d.iddatadb) AS tot,
               COUNT(ip.id) + COUNT(DISTINCT d.iddatadb) AS parts
        FROM datadb d
        LEFT JOIN auth_users u ON u.id = d.user_id
        LEFT JOIN identification_parts ip ON ip.iddatadb = d.iddatadb
        WHERE d.status = 'l'
          AND DATE_FORMAT(d.export_date, '%Y-%m') = :m
        GROUP BY d.user_id, username
        ORDER BY parts DESC
    ");
    $stmtU->execute(['m' => $month]);
    $byUser = $stmtU->fetchAll(PDO::FETCH_ASSOC);

    // Normalizza tipi
    foreach ($byClient as &$r) {
        $r['idclient'] = $r['idclient'] !== null ? (int)$r['idclient'] : null;
        $r['tot'] = (int)$r['tot'];
        $r['parts'] = (int)$r['parts'];
        $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'];
        $r['parts'] = (int)$r['parts'];
        if (isset($r['username'])) $r['username'] = $r['username'] !== null && $r['username'] !== '' ? $r['username'] : null;
    }
    unset($r);

    // --- Totale COMMESSE del mese ---
    $totExport = array_sum(array_column($byClient, 'tot'));

    // --- Totale PARTI/CAMPIONI del mese (status = 'l', +1 per commessa) ---
    $stmtP = $pdo->prepare("
        SELECT COUNT(ip.id) + COUNT(DISTINCT d.iddatadb)
        FROM datadb d
        LEFT JOIN identification_parts ip ON ip.iddatadb = d.iddatadb
        WHERE d.status = 'l'
          AND DATE_FORMAT(d.export_date, '%Y-%m') = :m
    ");
    $stmtP->execute(['m' => $month]);
    $totParts = (int)$stmtP->fetchColumn();

    // --- Totale COMMESSE dell'ANNO del mese selezionato ---
    $stmtY = $pdo->prepare("
        SELECT COUNT(*)
        FROM datadb d
        WHERE d.status = 'l'
          AND YEAR(d.export_date) = :y
    ");
    $stmtY->execute(['y' => $year]);
    $totExportYear = (int)$stmtY->fetchColumn();

    // --- Totale PARTI dell'ANNO del mese selezionato (+1 per commessa) ---
    $stmtYP = $pdo->prepare("
        SELECT COUNT(ip.id) + COUNT(DISTINCT d.iddatadb)
        FROM datadb d
        LEFT JOIN identification_parts ip ON ip.iddatadb = d.iddatadb
        WHERE d.status = 'l'
          AND YEAR(d.export_date) = :y
    ");
    $stmtYP->execute(['y' => $year]);
    $totPartsYear = (int)$stmtYP->fetchColumn();

    // --- Campioni LIMS: somma dei total_samples di tutti i giorni del mese ---
    $stmtL = $pdo->prepare("
        SELECT COALESCE(SUM(total_samples), 0)
        FROM lims_daily_samples
        WHERE DATE_FORMAT(sample_date, '%Y-%m') = :m
    ");
    $stmtL->execute(['m' => $month]);
    $limsSamples = (int)$stmtL->fetchColumn();

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