<?php
header("Content-Type: application/json; charset=utf-8");

// ---------------------------------------------------------
// 1) CONFIGURAZIONE
// ---------------------------------------------------------
$apiKey    = "info@claudiosironi.com_Qfh02D7sAvi2tcx3ZchHpusNaBquCKhJw81fEnkHe2ersQDVOex4IokhCCzaFAz1";
$fileToken = "filetoken://61a780917907f86a340290d22c449357dc68950e9066bd67b2";

// opzionale: passare un token via GET
if (isset($_GET['token']) && $_GET['token'] !== "") {
    $fileToken = $_GET['token'];
}

// ---------------------------------------------------------
// 2) PDF.CO → JSON2 (TUTTE LE PAGINE)
// ---------------------------------------------------------
$endpoint = "https://api.pdf.co/v1/pdf/convert/to/json2";

$payload = [
    "url"          => $fileToken,
    "inline"       => true,
    "detectTables" => true,
    "pages"        => "all"
];

$ch = curl_init($endpoint);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    "Content-Type: application/json",
    "x-api-key: $apiKey"
]);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($payload));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($ch);

if (!$response) {
    echo json_encode(["error" => "Errore CURL: " . curl_error($ch)]);
    exit;
}

curl_close($ch);

$json = json_decode($response, true);

// ---------------------------------------------------------
// 3) VALIDAZIONE
// ---------------------------------------------------------
if (!isset($json["body"]["document"]["page"])) {
    echo json_encode([
        "error" => true,
        "message" => "PDF.co JSON senza pagine valide",
        "raw" => $json
    ]);
    exit;
}

$pages = $json["body"]["document"]["page"];

// ---------------------------------------------------------
// 4) FUNZIONI UTILI
// ---------------------------------------------------------

// Formato A – 291 02F
function isCodeTypeA($txt)
{
    return preg_match('/^\d{3}\s+[0-9A-Z]{2,3}$/', $txt);
}

// Formato C – blocchi ripetuti (499 3A 14 5.475)
function extractTypeCBlocks($line)
{
    preg_match_all(
        '/(\d{3})\s+([0-9A-Z]{1,3})\s+(\d{2})\s+(\d{1,3}\.\d{3})/',
        $line,
        $m,
        PREG_SET_ORDER
    );

    $out = [];
    foreach ($m as $b) {
        $out[] = [
            "codice"     => $b[1],
            "variante"   => $b[2],
            "dimensione" => $b[3],
            "prezzo"     => floatval(str_replace(".", "", $b[4]))
        ];
    }
    return $out;
}

// ---------------------------------------------------------
// 5) PARSER PER UNA SINGOLA RIGA (ricostruita)
// ---------------------------------------------------------
function parseLine($line)
{
    // FORMATO A
    if (preg_match('/^(\d{3}\s+[0-9A-Z]{2,3})\s+(.*)$/', $line, $mA)) {

        $codice = trim($mA[1]);
        $resto  = trim($mA[2]);

        preg_match_all('/\d{1,3}[.,]\d{2,3}/', $resto, $matchesPrezzi);

        if (count($matchesPrezzi[0]) >= 2) {

            $descr = trim(preg_replace('/\d{1,3}[.,]\d{2,3}/', '', $resto));

            $vals = array_map(function ($v) {
                return floatval(str_replace(",", ".", str_replace(".", "", $v)));
            }, $matchesPrezzi[0]);

            return [
                "type" => "A",
                "codice" => $codice,
                "descrizione" => $descr,
                "prezzi" => $vals
            ];
        }
    }

    // FORMATO B1
    if (preg_match(
        '/^(\d{3}\s+[A-Z]{1,3})\s+([A-Za-zÀ-ù0-9\s]+?)\s+((?:\d{1,3}[.,]\d{2,3}\s*){4,})$/',
        $line,
        $mB
    )) {
        $codice = trim($mB[1]);
        $descr  = trim($mB[2]);
        $valuesString = trim($mB[3]);

        preg_match_all('/\d{1,3}[.,]\d{2,3}/', $valuesString, $vv);

        $vals = array_map(function ($v) {
            return floatval(str_replace(",", ".", str_replace(".", "", $v)));
        }, $vv[0]);

        return [
            "type" => "B1",
            "codice" => $codice,
            "descrizione" => $descr,
            "prezzi" => $vals
        ];
    }

    // FORMATO C (ripetuto in riga)
    $blocks = extractTypeCBlocks($line);

    if (!empty($blocks)) {

        $desc = $line;
        foreach ($blocks as $b) {
            $pattern = sprintf(
                '/%s\s+%s\s+%s\s+\d{1,3}\.\d{3}/',
                $b["codice"],
                $b["variante"],
                $b["dimensione"]
            );
            $desc = preg_replace($pattern, "", $desc);
        }

        $desc = trim($desc);

        return [
            "type" => "C",
            "descrizione" => $desc,
            "varianti" => $blocks
        ];
    }

    // Nessun match
    return null;
}

// ---------------------------------------------------------
// 6) PROCESSAMENTO DI TUTTE LE PAGINE
// ---------------------------------------------------------
$items = [];

foreach ($pages as $p) {

    if (!isset($p["row"])) continue;

    // Ricostruisco tutte le vere righe (“flat lines”)
    $flatLines = [];

    foreach ($p["row"] as $row) {
        $line = "";
        foreach ($row["column"] as $col) {
            if (!empty($col["text"]["text"])) {
                $line .= " " . trim($col["text"]["text"]);
            }
        }
        $line = trim($line);
        if ($line !== "") {
            $flatLines[] = $line;
        }
    }

    // Applico i parser su ogni riga ricostruita
    foreach ($flatLines as $l) {
        $parsed = parseLine($l);
        if ($parsed !== null) {
            $items[] = $parsed;
        }
    }
}

// ---------------------------------------------------------
// 7) OUTPUT FINALE
// ---------------------------------------------------------
echo json_encode([
    "status" => "ok",
    "total"  => count($items),
    "items"  => $items
], JSON_PRETTY_PRINT);