<?php
require_once dirname(__DIR__, 2) . '/vendor/autoload.php';
require_once __DIR__ . '/class/db-functions.php';
include dirname(__DIR__) . '/../extra/auth.php';

if (!Auth::check()) {
    http_response_code(401);
    echo json_encode(['error' => 'Unauthorized']);
    exit;
}

require_once __DIR__ . '/class/VisualLimsApiClient.class.php';

header('Content-Type: application/json');
ini_set('display_errors', '0');
error_reporting(E_ALL);

$q = mb_strtolower(trim($_GET['q'] ?? ''));
$limit = max(1, min(50, intval($_GET['limit'] ?? 20)));
$id = isset($_GET['id']) ? intval($_GET['id']) : null;

$tipo = $_GET['tipo'] ?? ''; // 'attivo' | 'inattivo' | '' (nessun filtro)

function isInattivo(array $c): bool
{
    $v = $c['Inattivo'] ?? false;
    return $v === true || $v === 1 || $v === '1' || $v === 'true';
}

function formatClientLabel(array $client): string
{
    $name = trim($client['Nominativo'] ?? '');
    $id = trim((string)($client['IdCliente'] ?? ''));
    $code = trim((string)($client['CodiceCliente'] ?? ''));

    $parts = explode('_', $code);
    $suffix = trim($parts[1] ?? '');

    if ($suffix === '' && $code !== '') {
        $suffix = substr($code, 0, 1);
    }

    if ($suffix === '') {
        $suffix = '--';
    }

    return $name . ' - ' . $suffix . ' - ' . $id;
}

try {
    // Load from cache or API
    $cacheFile = __DIR__ . '/cache/clienti.json';

    if (file_exists($cacheFile) && (time() - filemtime($cacheFile) < 3600)) {
        $data = json_decode(file_get_contents($cacheFile), true);
    } else {
        $api = VisualLimsApiClient::getInstance();

        $params = [
            '$select' => 'IdCliente,Nominativo,CodiceCliente,Inattivo',
            '$orderby' => 'Nominativo asc'
        ];

        $data = $api->get("Cliente?" . http_build_query($params));

        if (!is_dir(__DIR__ . '/cache')) {
            mkdir(__DIR__ . '/cache', 0777, true);
        }

        file_put_contents($cacheFile, json_encode($data));
    }

    $clients = $data['value'] ?? [];

    // Filtro tipo, applicato SOLO alla ricerca, non al lookup per id
    $searchClients = $clients;
    if ($tipo === 'attivo') {
        $searchClients = array_values(array_filter($clients, fn($c) => !isInattivo($c)));
    } elseif ($tipo === 'inattivo') {
        $searchClients = array_values(array_filter($clients, fn($c) => isInattivo($c)));
    }

    // If requesting by specific ID, used for loading selected value
    if ($id !== null) {
        foreach ($clients as $c) {
            if ((int)$c['IdCliente'] === $id) {
                echo json_encode([
                    'results' => [[
                        'id' => $c['IdCliente'],
                        'text' => formatClientLabel($c),
                        'IdCliente' => $c['IdCliente'],
                        'Nominativo' => trim($c['Nominativo'] ?? ''),
                        'CodiceCliente' => trim($c['CodiceCliente'] ?? '')
                    ]]
                ]);
                exit;
            }
        }

        echo json_encode(['results' => []]);
        exit;
    }

    // Search by query
    $results = [];

    foreach ($searchClients as $c) {
        $name = trim($c['Nominativo'] ?? '');
        $code = trim($c['CodiceCliente'] ?? '');

        // Cerca solo su ciò che viene visualizzato: Nome - Lettera - ID
        $label = formatClientLabel($c);

        if (
            $q === '' ||
            mb_strpos(mb_strtolower($label), $q) !== false
        ) {
            $results[] = [
                'id' => $c['IdCliente'],
                'text' => $label,
                'IdCliente' => $c['IdCliente'],
                'Nominativo' => $name,
                'CodiceCliente' => $code
            ];

            if (count($results) >= $limit) {
                break;
            }
        }
    }

    echo json_encode(['results' => $results]);
} catch (Exception $e) {
    http_response_code(500);
    echo json_encode(['error' => $e->getMessage()]);
}