<?php
ob_start(); // buffer any accidental output
ini_set('display_errors', 1);
error_reporting(E_ALL);

include('include/headscript.php');

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

$worksheet_id = isset($_GET['id']) && is_numeric($_GET['id']) ? (int)$_GET['id'] : 0;

// AJAX HANDLERS
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['ajax']) && $_POST['ajax'] == '1') {
    // Ensure clean JSON output (remove any echoed HTML/notices)
    while (ob_get_level()) {
        ob_end_clean();
    }
    header('Content-Type: application/json; charset=utf-8');

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

    $action = $_POST['action'] ?? '';

    try {
        // Save header (insert/update)
        if ($action === 'save_header') {
            $idmatrice = (int)($_POST['idmatrice'] ?? 0);
            if ($idmatrice <= 0) {
                echo json_encode(['success' => false, 'message' => 'Seleziona una matrice/profilo']);
                exit;
            }

            $id = (int)($_POST['id'] ?? 0);

            $worksheet_date = $_POST['worksheet_date'] !== '' ? $_POST['worksheet_date'] : null;
            $customer_name  = trim($_POST['customer_name'] ?? '');
            $profile_code   = trim($_POST['profile_type_code'] ?? '');
            $marking        = ($_POST['marking'] ?? '') !== '' ? $_POST['marking'] : null;

            $prod_control   = trim($_POST['prod_control_measure_settings'] ?? '');

            $freq_cut       = trim($_POST['control_frequency_cut'] ?? '');
            $freq_draw      = trim($_POST['control_frequency_drawing'] ?? '');
            $freq_jig       = trim($_POST['control_frequency_jig'] ?? '');
            $mode_jig       = trim($_POST['control_mode_jig'] ?? '');

            $box_type       = trim($_POST['box_type'] ?? '');
            $pkg_box        = $_POST['packages_or_pieces_per_box'] !== '' ? (int)$_POST['packages_or_pieces_per_box'] : null;
            $m_box          = $_POST['meters_per_box'] !== '' ? (int)$_POST['meters_per_box'] : null;

            $pallet_type    = trim($_POST['pallet_type'] ?? '');
            $per_pallet     = $_POST['boxes_or_packages_per_pallet'] !== '' ? (int)$_POST['boxes_or_packages_per_pallet'] : null;

            $sp_exp_kg      = $_POST['speed_expected_kg_h'] !== '' ? (float)$_POST['speed_expected_kg_h'] : null;
            $sp_act_kg      = $_POST['speed_actual_kg_h'] !== '' ? (float)$_POST['speed_actual_kg_h'] : null;
            $sp_exp_m       = $_POST['speed_expected_m_h'] !== '' ? (float)$_POST['speed_expected_m_h'] : null;
            $sp_act_m       = $_POST['speed_actual_m_h'] !== '' ? (float)$_POST['speed_actual_m_h'] : null;

            $approved_by    = trim($_POST['approved_by'] ?? '');
            $notes          = trim($_POST['notes'] ?? '');

            if ($id > 0) {
                $stmt = $pdo->prepare("
                    UPDATE work_sheets SET
                        idmatrice = ?,
                        worksheet_date = ?,
                        customer_name = ?,
                        profile_type_code = ?,
                        marking = ?,
                        prod_control_measure_settings = ?,
                        control_frequency_cut = ?,
                        control_frequency_drawing = ?,
                        control_frequency_jig = ?,
                        control_mode_jig = ?,
                        box_type = ?,
                        packages_or_pieces_per_box = ?,
                        meters_per_box = ?,
                        pallet_type = ?,
                        boxes_or_packages_per_pallet = ?,
                        speed_expected_kg_h = ?,
                        speed_actual_kg_h = ?,
                        speed_expected_m_h = ?,
                        speed_actual_m_h = ?,
                        approved_by = ?,
                        notes = ?
                    WHERE id = ?
                ");
                $stmt->execute([
                    $idmatrice,
                    $worksheet_date,
                    $customer_name !== '' ? $customer_name : null,
                    $profile_code !== '' ? $profile_code : null,
                    $marking,
                    $prod_control !== '' ? $prod_control : null,
                    $freq_cut !== '' ? $freq_cut : null,
                    $freq_draw !== '' ? $freq_draw : null,
                    $freq_jig !== '' ? $freq_jig : null,
                    $mode_jig !== '' ? $mode_jig : null,
                    $box_type !== '' ? $box_type : null,
                    $pkg_box,
                    $m_box,
                    $pallet_type !== '' ? $pallet_type : null,
                    $per_pallet,
                    $sp_exp_kg,
                    $sp_act_kg,
                    $sp_exp_m,
                    $sp_act_m,
                    $approved_by !== '' ? $approved_by : null,
                    $notes !== '' ? $notes : null,
                    $id
                ]);

                echo json_encode(['success' => true, 'id' => $id]);
                exit;
            }

            $stmt = $pdo->prepare("
                INSERT INTO work_sheets
                (idmatrice, worksheet_date, customer_name, profile_type_code, marking,
                 prod_control_measure_settings, control_frequency_cut, control_frequency_drawing, control_frequency_jig, control_mode_jig,
                 box_type, packages_or_pieces_per_box, meters_per_box,
                 pallet_type, boxes_or_packages_per_pallet,
                 speed_expected_kg_h, speed_actual_kg_h, speed_expected_m_h, speed_actual_m_h,
                 approved_by, notes)
                VALUES
                (?, ?, ?, ?, ?,
                 ?, ?, ?, ?, ?,
                 ?, ?, ?,
                 ?, ?,
                 ?, ?, ?, ?,
                 ?, ?)
            ");
            $stmt->execute([
                $idmatrice,
                $worksheet_date,
                $customer_name !== '' ? $customer_name : null,
                $profile_code !== '' ? $profile_code : null,
                $marking,
                $prod_control !== '' ? $prod_control : null,
                $freq_cut !== '' ? $freq_cut : null,
                $freq_draw !== '' ? $freq_draw : null,
                $freq_jig !== '' ? $freq_jig : null,
                $mode_jig !== '' ? $mode_jig : null,
                $box_type !== '' ? $box_type : null,
                $pkg_box,
                $m_box,
                $pallet_type !== '' ? $pallet_type : null,
                $per_pallet,
                $sp_exp_kg,
                $sp_act_kg,
                $sp_exp_m,
                $sp_act_m,
                $approved_by !== '' ? $approved_by : null,
                $notes !== '' ? $notes : null
            ]);

            $newId = (int)$pdo->lastInsertId();
            echo json_encode(['success' => true, 'id' => $newId]);
            exit;
        }

        // Add or edit mix row
        if ($action === 'save_mix_row') {
            $worksheet_id = (int)($_POST['worksheet_id'] ?? 0);
            if ($worksheet_id <= 0) {
                echo json_encode(['success' => false, 'message' => 'Salva prima il foglio (testata)']);
                exit;
            }

            $row_id     = (int)($_POST['row_id'] ?? 0);
            $idmescola  = (int)($_POST['idmescola'] ?? 0);
            $pos = 0; // auto-assign


            if ($idmescola <= 0) {
                echo json_encode(['success' => false, 'message' => 'Seleziona una mescola']);
                exit;
            }
            if ($pos <= 0) $pos = 1;

            $mix_weight = $_POST['mix_weight_g_m'] !== '' ? (float)$_POST['mix_weight_g_m'] : null;
            $density    = trim($_POST['required_density'] ?? '');
            $hardness   = trim($_POST['required_hardness_shore_a'] ?? '');

            $lub_type   = ($_POST['lubrication_type'] ?? '') !== '' ? $_POST['lubrication_type'] : null;
            $lub_note   = trim($_POST['lubrication_notes'] ?? '');

            $pkg_code   = trim($_POST['requested_package_code'] ?? '');
            $m_pkg      = $_POST['meters_per_package'] !== '' ? (int)$_POST['meters_per_package'] : null;
            $m_pkg_note = trim($_POST['meters_per_package_notes'] ?? '');
            $m_pkg_tol  = trim($_POST['meters_per_package_tolerance'] ?? '');

            // Use transaction to keep constraints consistent
            $pdo->beginTransaction();

            if ($row_id > 0) {

                // Auto-assign mix_position = max + 1 for this worksheet
                $stmtPos = $pdo->prepare("
                    SELECT IFNULL(MAX(mix_position), 0) + 1
                    FROM work_sheet_mescole
                    WHERE worksheet_id = ?
                    FOR UPDATE
                ");
                $stmtPos->execute([$worksheet_id]);
                $pos = (int)$stmtPos->fetchColumn();
                if ($pos <= 0) $pos = 1;


                $stmt = $pdo->prepare("
                            UPDATE work_sheet_mescole SET
                                idmescola = ?,
                                mix_weight_g_m = ?,
                                required_density = ?,
                                required_hardness_shore_a = ?,
                                lubrication_type = ?,
                                lubrication_notes = ?,
                                requested_package_code = ?,
                                meters_per_package = ?,
                                meters_per_package_notes = ?,
                                meters_per_package_tolerance = ?
                            WHERE id = ? AND worksheet_id = ?
                        ");

                $stmt->execute([
                    $idmescola,
                    $mix_weight,
                    $density !== '' ? $density : null,
                    $hardness !== '' ? $hardness : null,
                    $lub_type,
                    $lub_note !== '' ? $lub_note : null,
                    $pkg_code !== '' ? $pkg_code : null,
                    $m_pkg,
                    $m_pkg_note !== '' ? $m_pkg_note : null,
                    $m_pkg_tol !== '' ? $m_pkg_tol : null,
                    $row_id,
                    $worksheet_id
                ]);


                $pdo->commit();
                echo json_encode(['success' => true]);
                exit;
            }

            // If position already used, auto-assign next (max+1)
            $chk = $pdo->prepare("SELECT COUNT(*) FROM work_sheet_mescole WHERE worksheet_id = ? AND mix_position = ?");
            $chk->execute([$worksheet_id, $pos]);
            if ((int)$chk->fetchColumn() > 0) {
                $mx = $pdo->prepare("SELECT IFNULL(MAX(mix_position),0) + 1 FROM work_sheet_mescole WHERE worksheet_id = ?");
                $mx->execute([$worksheet_id]);
                $pos = (int)$mx->fetchColumn();
            }


            $stmt = $pdo->prepare("
                INSERT INTO work_sheet_mescole
                (worksheet_id, idmescola, mix_position, mix_weight_g_m, required_density, required_hardness_shore_a,
                 lubrication_type, lubrication_notes,
                 requested_package_code, meters_per_package, meters_per_package_notes, meters_per_package_tolerance)
                VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
            ");
            $stmt->execute([
                $worksheet_id,
                $idmescola,
                $pos,
                $mix_weight,
                $density !== '' ? $density : null,
                $hardness !== '' ? $hardness : null,
                $lub_type,
                $lub_note !== '' ? $lub_note : null,
                $pkg_code !== '' ? $pkg_code : null,
                $m_pkg,
                $m_pkg_note !== '' ? $m_pkg_note : null,
                $m_pkg_tol !== '' ? $m_pkg_tol : null
            ]);

            $pdo->commit();
            echo json_encode(['success' => true]);
            exit;
        }

        // Delete mix row
        if ($action === 'delete_mix_row') {
            $row_id = (int)($_POST['row_id'] ?? 0);
            if ($row_id <= 0) {
                echo json_encode(['success' => false, 'message' => 'ID riga non valido']);
                exit;
            }

            $stmt = $pdo->prepare("DELETE FROM work_sheet_mescole WHERE id = ?");
            $stmt->execute([$row_id]);

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

        echo json_encode(['success' => false, 'message' => 'Azione sconosciuta']);
        exit;
    } catch (Exception $e) {
        if ($pdo->inTransaction()) $pdo->rollBack();
        echo json_encode(['success' => false, 'message' => $e->getMessage()]);
        exit;
    }
}

// Load matrices dropdown
$matrici = $pdo->query("
    SELECT id, nome, cliente
    FROM matrice
    ORDER BY nome ASC
")->fetchAll(PDO::FETCH_ASSOC);

// Load worksheet lookup options
$lookup = [];
$lookupDefault = [];

$stmt = $pdo->prepare("
    SELECT category, value, label, is_default
    FROM ws_lookup_options
    WHERE is_active = 1
    ORDER BY category ASC, sort_order ASC, label ASC
");
$stmt->execute();

foreach ($stmt->fetchAll(PDO::FETCH_ASSOC) as $r) {
    $lookup[$r['category']][] = $r;

    if ((int)$r['is_default'] === 1 && !isset($lookupDefault[$r['category']])) {
        $lookupDefault[$r['category']] = $r['value'];
    }
}


// Load mescole dropdown for modal
$mescole = $pdo->query("
    SELECT id, nome, nomeuscita
    FROM mescole
    ORDER BY nome ASC
")->fetchAll(PDO::FETCH_ASSOC);

// Load worksheet (edit)
$worksheet = null;
$mixRows = [];

if ($worksheet_id > 0) {
    $stmt = $pdo->prepare("
        SELECT ws.*, m.nome AS matrice_nome
        FROM work_sheets ws
        LEFT JOIN matrice m ON ws.idmatrice = m.id
        WHERE ws.id = ?
    ");
    $stmt->execute([$worksheet_id]);
    $worksheet = $stmt->fetch(PDO::FETCH_ASSOC);

    if ($worksheet) {
        $stmt = $pdo->prepare("
            SELECT
                wsm.*,
                me.nome AS mescola_nome,
                me.nomeuscita AS mescola_uscita
            FROM work_sheet_mescole wsm
            LEFT JOIN mescole me ON me.id = wsm.idmescola
            WHERE wsm.worksheet_id = ?
            ORDER BY wsm.mix_position ASC, wsm.id ASC
        ");
        $stmt->execute([$worksheet_id]);
        $mixRows = $stmt->fetchAll(PDO::FETCH_ASSOC);
    } else {
        $worksheet_id = 0;
    }
}

// Helpers
function h($v)
{
    return htmlspecialchars((string)$v, ENT_QUOTES);
}

function ws_options($rows, $selectedValue, $defaultValue = '')
{
    $selectedValue = (string)$selectedValue;
    if ($selectedValue === '' && $defaultValue !== '') {
        $selectedValue = (string)$defaultValue;
    }

    $html = '<option value="">--</option>';
    if (!$rows) return $html;

    foreach ($rows as $r) {
        $val = h($r['value']);
        $lab = h($r['label']);
        $sel = ((string)$r['value'] === $selectedValue) ? ' selected' : '';
        $html .= "<option value=\"{$val}\"{$sel}>{$lab}</option>";
    }
    return $html;
}

$isEdit = ($worksheet_id > 0);
?>

<!doctype html>
<html lang="it">

<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <?php include('cssinclude.php'); ?>
    <title><?= $isEdit ? 'Modifica Foglio di Lavoro' : 'Nuovo Foglio di Lavoro' ?></title>

    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>

    <script src="https://cdn.jsdelivr.net/npm/sweetalert2@11"></script>

    <link rel="stylesheet" href="https://cdn.datatables.net/1.13.6/css/dataTables.bootstrap5.min.css">
    <script src="https://cdn.datatables.net/1.13.6/js/jquery.dataTables.min.js"></script>
    <script src="https://cdn.datatables.net/1.13.6/js/dataTables.bootstrap5.min.js"></script>

    <link href="https://cdn.jsdelivr.net/npm/select2@4.1.0-rc.0/dist/css/select2.min.css" rel="stylesheet" />
    <link href="https://cdn.jsdelivr.net/npm/@ttskch/select2-bootstrap4-theme@1.5.2/dist/select2-bootstrap4.min.css" rel="stylesheet" />
    <script src="https://cdn.jsdelivr.net/npm/select2@4.1.0-rc.0/dist/js/select2.min.js"></script>


    <style>
        body {
            font-size: 0.95rem;
            background: #f8fafc;
        }

        .card {
            border-radius: 16px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
        }

        .back-dashboard {
            background: #cfe3ff !important;
            color: #1f2d3d !important;
            border: 1px solid #bcd4f4 !important;
            border-radius: 10px;
            font-weight: 600;
            padding: 10px 18px;
        }

        .btn-add {
            background: #0d6efd;
            color: white;
            border-radius: 8px;
            padding: 10px 20px;
            font-weight: 500;
        }

        .table thead {
            background: #cfe3ff;
            color: #1f2d3d;
        }

        .modal-content {
            border-radius: 16px;
        }

        .section-title {
            font-weight: 700;
            color: #1f2d3d;
        }

        .small-hint {
            color: #6b7280;
            font-size: 0.85rem;
        }
    </style>
</head>

<body>
    <div class="wrapper toggled">
        <?php include('include/navbar.php'); ?>
        <?php include('include/topbar.php'); ?>

        <div class="page-wrapper">
            <div class="page-content">

                <div class="card p-3">
                    <div class="card-header d-flex justify-content-between align-items-center">
                        <div>
                            <h5 class="mb-0"><?= $isEdit ? 'Modifica Foglio di Lavoro' : 'Nuovo Foglio di Lavoro' ?></h5>
                            <div class="small-hint">Prima salva la testata, poi aggiungi le mescole con il modale</div>
                        </div>
                        <div class="d-flex gap-2">
                            <button class="btn back-dashboard" onclick="location.href='worksheets.php'">↩️ Storico</button>
                        </div>
                    </div>

                    <div class="card-body">
                        <!-- HEADER FORM -->
                        <form id="worksheetHeaderForm">
                            <input type="hidden" name="id" id="wsId" value="<?= (int)$worksheet_id ?>">

                            <div class="row g-3">
                                <div class="col-md-6">
                                    <label class="form-label fw-semibold">Matrice / Profilo *</label>
                                    <select class="form-select" name="idmatrice" id="idmatrice" required>
                                        <option value="">-- Seleziona --</option>
                                        <?php foreach ($matrici as $m): ?>
                                            <option value="<?= (int)$m['id'] ?>"
                                                <?= $worksheet && (int)$worksheet['idmatrice'] === (int)$m['id'] ? 'selected' : '' ?>>
                                                <?= h($m['nome']) ?><?= $m['cliente'] ? ' — ' . h($m['cliente']) : '' ?>
                                            </option>
                                        <?php endforeach; ?>
                                    </select>
                                </div>

                                <div class="col-md-3">
                                    <label class="form-label fw-semibold">Data foglio</label>
                                    <input type="date" class="form-control" name="worksheet_date"
                                        value="<?= $worksheet ? h($worksheet['worksheet_date']) : '' ?>">
                                </div>

                                <div class="col-md-3">
                                    <label class="form-label fw-semibold">Codice profilo</label>
                                    <input type="text" class="form-control" name="profile_type_code"
                                        value="<?= $worksheet ? h($worksheet['profile_type_code']) : '' ?>">
                                </div>

                                <div class="col-md-6">
                                    <label class="form-label fw-semibold">Cliente (override)</label>
                                    <input type="text" class="form-control" name="customer_name"
                                        value="<?= $worksheet ? h($worksheet['customer_name']) : '' ?>">
                                </div>

                                <div class="col-md-3">
                                    <label class="form-label fw-semibold">Marchiatura</label>
                                    <select class="form-select" name="marking" id="marking">
                                        <?= ws_options($lookup['marking'] ?? [], $worksheet['marking'] ?? '', $lookupDefault['marking'] ?? '') ?>
                                    </select>

                                </div>

                                <div class="col-md-3">
                                    <label class="form-label fw-semibold">Visto / Approvazione</label>
                                    <input type="text" class="form-control" name="approved_by"
                                        value="<?= $worksheet ? h($worksheet['approved_by']) : '' ?>">
                                </div>

                                <div class="col-12">
                                    <label class="form-label fw-semibold">Impostazione misure controllo produzione</label>
                                    <textarea class="form-control" name="prod_control_measure_settings" rows="2"><?= $worksheet ? h($worksheet['prod_control_measure_settings']) : '' ?></textarea>
                                </div>

                                <div class="col-md-3">
                                    <label class="form-label fw-semibold">Controlli - Taglio</label>
                                    <select class="form-select" name="control_frequency_cut" id="control_frequency_cut">
                                        <?= ws_options($lookup['control_frequency_cut'] ?? [], $worksheet['control_frequency_cut'] ?? '', $lookupDefault['control_frequency_cut'] ?? '') ?>
                                    </select>

                                </div>
                                <div class="col-md-3">
                                    <label class="form-label fw-semibold">Controlli - Disegno</label>
                                    <select class="form-select" name="control_frequency_drawing" id="control_frequency_drawing">
                                        <?= ws_options($lookup['control_frequency_drawing'] ?? [], $worksheet['control_frequency_drawing'] ?? '', $lookupDefault['control_frequency_drawing'] ?? '') ?>
                                    </select>

                                </div>
                                <div class="col-md-3">
                                    <label class="form-label fw-semibold">Controlli - Dima</label>
                                    <select class="form-select" name="control_frequency_jig" id="control_frequency_jig">
                                        <?= ws_options($lookup['control_frequency_jig'] ?? [], $worksheet['control_frequency_jig'] ?? '', $lookupDefault['control_frequency_jig'] ?? '') ?>
                                    </select>

                                </div>
                                <div class="col-md-3">
                                    <label class="form-label fw-semibold">Modalità dima</label>
                                    <select class="form-select" name="control_mode_jig" id="control_mode_jig">
                                        <?= ws_options($lookup['control_mode_jig'] ?? [], $worksheet['control_mode_jig'] ?? '', $lookupDefault['control_mode_jig'] ?? '') ?>
                                    </select>

                                </div>

                                <div class="col-md-3">
                                    <label class="form-label fw-semibold">Scatola (tipo)</label>
                                    <select class="form-select" name="box_type" id="box_type">
                                        <?= ws_options($lookup['box_type'] ?? [], $worksheet['box_type'] ?? '', $lookupDefault['box_type'] ?? '') ?>
                                    </select>

                                </div>
                                <div class="col-md-3">
                                    <label class="form-label fw-semibold">N° conf./pezzi per scatola</label>
                                    <input type="number" class="form-control" name="packages_or_pieces_per_box"
                                        value="<?= $worksheet ? h($worksheet['packages_or_pieces_per_box']) : '' ?>">
                                </div>
                                <div class="col-md-3">
                                    <label class="form-label fw-semibold">Metri per scatola</label>
                                    <input type="number" class="form-control" name="meters_per_box"
                                        value="<?= $worksheet ? h($worksheet['meters_per_box']) : '' ?>">
                                </div>
                                <div class="col-md-3">
                                    <label class="form-label fw-semibold">Bancale (tipo)</label>
                                    <select class="form-select" name="pallet_type" id="pallet_type">
                                        <?= ws_options($lookup['pallet_type'] ?? [], $worksheet['pallet_type'] ?? '', $lookupDefault['pallet_type'] ?? '') ?>
                                    </select>

                                </div>

                                <div class="col-md-3">
                                    <label class="form-label fw-semibold">Scatole/conf. per bancale</label>
                                    <input type="number" class="form-control" name="boxes_or_packages_per_pallet"
                                        value="<?= $worksheet ? h($worksheet['boxes_or_packages_per_pallet']) : '' ?>">
                                </div>

                                <div class="col-md-3">
                                    <label class="form-label fw-semibold">Vel. prevista (kg/h)</label>
                                    <input type="number" step="0.01" class="form-control" name="speed_expected_kg_h"
                                        value="<?= $worksheet ? h($worksheet['speed_expected_kg_h']) : '' ?>">
                                </div>
                                <div class="col-md-3">
                                    <label class="form-label fw-semibold">Vel. effettiva (kg/h)</label>
                                    <input type="number" step="0.01" class="form-control" name="speed_actual_kg_h"
                                        value="<?= $worksheet ? h($worksheet['speed_actual_kg_h']) : '' ?>">
                                </div>
                                <div class="col-md-3">
                                    <label class="form-label fw-semibold">Vel. prevista (m/h)</label>
                                    <input type="number" step="0.01" class="form-control" name="speed_expected_m_h"
                                        value="<?= $worksheet ? h($worksheet['speed_expected_m_h']) : '' ?>">
                                </div>
                                <div class="col-md-3">
                                    <label class="form-label fw-semibold">Vel. effettiva (m/h)</label>
                                    <input type="number" step="0.01" class="form-control" name="speed_actual_m_h"
                                        value="<?= $worksheet ? h($worksheet['speed_actual_m_h']) : '' ?>">
                                </div>

                                <div class="col-12">
                                    <label class="form-label fw-semibold">Note</label>
                                    <textarea class="form-control" name="notes" rows="2"><?= $worksheet ? h($worksheet['notes']) : '' ?></textarea>
                                </div>

                                <div class="col-12 d-flex justify-content-center gap-2 mt-2">
                                    <button type="submit" class="btn btn-add">💾 Salva Testata</button>
                                    <button type="button" class="btn btn-outline-primary"
                                        id="btnAddMix" data-bs-toggle="modal" data-bs-target="#mixModal" disabled>
                                        ➕ Aggiungi Mescola
                                    </button>
                                </div>
                            </div>
                        </form>

                        <hr class="my-4">

                        <!-- MIX ROWS TABLE -->
                        <div class="d-flex justify-content-between align-items-center mb-2">
                            <div class="section-title">Mescole associate al foglio</div>
                            <div class="small-hint">Usa “Aggiungi Mescola” per inserire una o più righe</div>
                        </div>

                        <div class="table-responsive">
                            <table id="tabellaMixRows" class="table table-striped table-bordered">
                                <thead>
                                    <tr>
                                        <th>Pos</th>
                                        <th>Mescola</th>
                                        <th>Peso (g/m)</th>
                                        <th>Densità</th>
                                        <th>Durezza</th>
                                        <th>Lubr.</th>
                                        <th>Confez.</th>
                                        <th>m/conf.</th>
                                        <th>Azioni</th>
                                    </tr>
                                </thead>
                                <tbody>
                                    <?php foreach ($mixRows as $r): ?>
                                        <tr>
                                            <td><?= (int)$r['mix_position'] ?></td>
                                            <td>
                                                <?= h($r['mescola_nome'] ?? '-') ?>
                                                <?php if (!empty($r['mescola_uscita'])): ?>
                                                    <div class="small-hint"><?= h($r['mescola_uscita']) ?></div>
                                                <?php endif; ?>
                                            </td>
                                            <td><?= h($r['mix_weight_g_m'] ?? '-') ?></td>
                                            <td><?= h($r['required_density'] ?? '-') ?></td>
                                            <td><?= h($r['required_hardness_shore_a'] ?? '-') ?></td>
                                            <td><?= h($r['lubrication_type'] ?? '-') ?></td>
                                            <td><?= h($r['requested_package_code'] ?? '-') ?></td>
                                            <td><?= h($r['meters_per_package'] ?? '-') ?></td>
                                            <td class="text-nowrap">
                                                <button class="btn btn-sm btn-outline-primary edit-mix"
                                                    data-row='<?= h(json_encode($r, JSON_UNESCAPED_UNICODE)) ?>'>
                                                    ✏️ Modifica
                                                </button>
                                                <button class="btn btn-sm btn-outline-danger delete-mix"
                                                    data-id="<?= (int)$r['id'] ?>">
                                                    🗑️
                                                </button>
                                            </td>
                                        </tr>
                                    <?php endforeach; ?>
                                </tbody>
                            </table>
                        </div>

                    </div>
                </div>

            </div>
        </div>

        <?php include('include/footer.php'); ?>
    </div>

    <!-- MODAL MIX -->
    <div class="modal fade" id="mixModal" tabindex="-1">
        <div class="modal-dialog modal-lg">
            <div class="modal-content">
                <div class="modal-header" style="background:#cfe3ff;">
                    <h5 class="modal-title" id="mixModalTitle">Aggiungi Mescola</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body">
                    <form id="mixForm">
                        <input type="hidden" name="worksheet_id" id="mixWorksheetId" value="<?= (int)$worksheet_id ?>">
                        <input type="hidden" name="row_id" id="mixRowId" value="0">

                        <div class="row g-3">
                            <div class="col-md-8">
                                <label class="form-label fw-semibold">Mescola *</label>
                                <select class="form-select" name="idmescola" id="idmescola" required>
                                    <option value="">-- Seleziona --</option>
                                    <?php foreach ($mescole as $me): ?>
                                        <option value="<?= (int)$me['id'] ?>">
                                            <?= h($me['nome']) ?><?= $me['nomeuscita'] ? ' — ' . h($me['nomeuscita']) : '' ?>
                                        </option>
                                    <?php endforeach; ?>
                                </select>
                            </div>

                            <input type="hidden" name="mix_position" id="mix_position" value="">


                            <div class="col-md-4">
                                <label class="form-label fw-semibold">Peso metro mescola (g/m)</label>
                                <input type="number" step="0.01" class="form-control" name="mix_weight_g_m" id="mix_weight_g_m">
                            </div>

                            <div class="col-md-4">
                                <label class="form-label fw-semibold">Densità richiesta</label>
                                <input type="text" class="form-control" name="required_density" id="required_density" placeholder="es. 1,22 +/- 0,03">
                            </div>

                            <div class="col-md-4">
                                <label class="form-label fw-semibold">Durezza richiesta (shore A)</label>
                                <input type="text" class="form-control" name="required_hardness_shore_a" id="required_hardness_shore_a" placeholder="es. 70 +/- 5">
                            </div>

                            <div class="col-md-4">
                                <label class="form-label fw-semibold">Lubrificazione</label>
                                <select class="form-select" name="lubrication_type" id="lubrication_type">
                                    <?= ws_options($lookup['lubrication_type'] ?? [], '', $lookupDefault['lubrication_type'] ?? '') ?>
                                </select>

                            </div>

                            <div class="col-md-8">
                                <label class="form-label fw-semibold">Note lubrificazione</label>
                                <input type="text" class="form-control" name="lubrication_notes" id="lubrication_notes">
                            </div>

                            <div class="col-md-4">
                                <label class="form-label fw-semibold">Codice confezione</label>
                                <select class="form-select" name="requested_package_code" id="requested_package_code">
                                    <?= ws_options($lookup['requested_package_code'] ?? [], '', $lookupDefault['requested_package_code'] ?? '') ?>
                                </select>

                            </div>

                            <div class="col-md-4">
                                <label class="form-label fw-semibold">Metri per confezione</label>
                                <input type="number" class="form-control" name="meters_per_package" id="meters_per_package">
                            </div>

                            <div class="col-md-4">
                                <label class="form-label fw-semibold">Tolleranza metri/confezione</label>
                                <input type="text" class="form-control" name="meters_per_package_tolerance" id="meters_per_package_tolerance" placeholder="es. +/- 4m">
                            </div>

                            <div class="col-12">
                                <label class="form-label fw-semibold">Note metri/confezione</label>
                                <input type="text" class="form-control" name="meters_per_package_notes" id="meters_per_package_notes">
                            </div>

                            <div class="col-12 text-center mt-2">
                                <button type="submit" class="btn btn-add">💾 Salva Mescola</button>
                            </div>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    </div>

    <?php include('jsinclude.php'); ?>

    <script>
        $(document).ready(function() {

            const wsIdInput = $('#wsId');
            const btnAddMix = $('#btnAddMix');

            if ($('#idmatrice').length) {
                $('#idmatrice').select2({
                    theme: 'bootstrap4',
                    width: '100%',
                    placeholder: '-- Seleziona --',
                    allowClear: true
                });
            }

            $('#mixModal').on('shown.bs.modal', function() {
                if (!$('#idmescola').data('select2')) {
                    $('#idmescola').select2({
                        theme: 'bootstrap4',
                        width: '100%',
                        dropdownParent: $('#mixModal'),
                        placeholder: '-- Seleziona --',
                        allowClear: true
                    });
                }
            });


            function enableMixButtonIfSaved() {
                const id = parseInt(wsIdInput.val() || '0', 10);
                if (id > 0) {
                    btnAddMix.prop('disabled', false);
                    $('#mixWorksheetId').val(id);
                } else {
                    btnAddMix.prop('disabled', true);
                    $('#mixWorksheetId').val('0');
                }
            }
            enableMixButtonIfSaved();

            $('#tabellaMixRows').DataTable({
                pageLength: 25,
                lengthMenu: [10, 25, 50, 100],
                order: [
                    [0, 'asc']
                ],
                language: {
                    url: 'https://cdn.datatables.net/plug-ins/1.13.6/i18n/it-IT.json'
                }
            });

            // Save header
            $('#worksheetHeaderForm').on('submit', function(e) {
                e.preventDefault();

                const formData = new FormData(this);
                formData.append('ajax', '1');
                formData.append('action', 'save_header');

                fetch(window.location.href, {
                        method: 'POST',
                        body: new URLSearchParams(formData)
                    })
                    .then(async (r) => {
                        const text = await r.text();

                        // Debug: if server returns warnings/HTML, you'll see it in console
                        try {
                            return JSON.parse(text);
                        } catch (err) {
                            console.error('Response is not valid JSON:', text);
                            throw new Error('Risposta non JSON (vedi console)');
                        }
                    })
                    .then(data => {
                        if (!data.success) {
                            Swal.fire({
                                icon: 'error',
                                title: 'Errore',
                                text: data.message
                            });
                            return;
                        }

                        wsIdInput.val(data.id);
                        enableMixButtonIfSaved();

                        // If new, update URL to edit mode
                        if (!window.location.search.includes('id=')) {
                            const newUrl = 'manage-worksheet.php?id=' + data.id;
                            window.history.replaceState({}, '', newUrl);
                        }

                        // ✅ What you want: confirm + stay on page + open modal if user wants
                        Swal.fire({
                            icon: 'success',
                            title: 'Testata salvata',
                            text: 'Vuoi aggiungere subito le mescole?',
                            showCancelButton: true,
                            confirmButtonText: 'Sì, aggiungi mescole',
                            cancelButtonText: 'No'
                        }).then(res => {
                            if (res.isConfirmed) {
                                const modal = new bootstrap.Modal(document.getElementById('mixModal'));
                                modal.show();
                            }
                        });
                    })
                    .catch(err => {
                        Swal.fire({
                            icon: 'error',
                            title: 'Errore AJAX',
                            text: err.message
                        });
                    });
            });


            // Prepare modal for add
            $('#mixModal').on('show.bs.modal', function() {
                const wsId = parseInt(wsIdInput.val() || '0', 10);
                if (wsId <= 0) {
                    Swal.fire({
                        icon: 'warning',
                        title: 'Salva prima la testata',
                        timer: 1200
                    });
                    return false;
                }

                // Reset for add by default
                $('#mixModalTitle').text('Aggiungi Mescola');
                $('#mixForm')[0].reset();
                $('#mixRowId').val('0');
                $('#mixWorksheetId').val(wsId);
                $('#idmescola').prop('disabled', false);
            });

            // Edit mix row
            $(document).on('click', '.edit-mix', function() {
                let row = $(this).attr('data-row');
                row = JSON.parse(row);

                // Titolo modale
                $('#mixModalTitle').text('Modifica Mescola');

                // NON resettare in "add"
                $('#mixForm')[0].reset();

                // Set id riga e worksheet
                $('#mixRowId').val(row.id);
                $('#mixWorksheetId').val(row.worksheet_id);

                // Mescola (se usi select2 devi triggerare change)
                $('#idmescola').prop('disabled', false);
                $('#idmescola').val(row.idmescola).trigger('change');

                // Campi
                $('#mix_weight_g_m').val(row.mix_weight_g_m ?? '');
                $('#required_density').val(row.required_density ?? '');
                $('#required_hardness_shore_a').val(row.required_hardness_shore_a ?? '');
                $('#lubrication_type').val(row.lubrication_type ?? '');
                $('#lubrication_notes').val(row.lubrication_notes ?? '');
                $('#requested_package_code').val(row.requested_package_code ?? '');
                $('#meters_per_package').val(row.meters_per_package ?? '');
                $('#meters_per_package_tolerance').val(row.meters_per_package_tolerance ?? '');
                $('#meters_per_package_notes').val(row.meters_per_package_notes ?? '');

                // Apri modale
                const modal = new bootstrap.Modal(document.getElementById('mixModal'));
                modal.show();
            });

            // Save mix row
            $('#mixForm').on('submit', function(e) {
                e.preventDefault();

                const formData = new FormData(this);
                formData.append('ajax', '1');
                formData.append('action', 'save_mix_row');

                fetch('', {
                        method: 'POST',
                        body: new URLSearchParams(formData)
                    })
                    .then(r => r.json())
                    .then(data => {
                        if (data.success) {
                            Swal.fire({
                                    icon: 'success',
                                    title: 'Salvata!',
                                    timer: 800
                                })
                                .then(() => location.reload());
                        } else {
                            Swal.fire({
                                icon: 'error',
                                title: 'Errore',
                                text: data.message
                            });
                        }
                    });
            });

            // Delete mix row
            $(document).on('click', '.delete-mix', function() {
                const rowId = $(this).data('id');

                Swal.fire({
                    title: 'Eliminare questa mescola dal foglio?',
                    icon: 'warning',
                    showCancelButton: true,
                    confirmButtonColor: '#d33',
                    cancelButtonColor: '#6c757d',
                    confirmButtonText: 'Sì, elimina',
                    cancelButtonText: 'Annulla'
                }).then(result => {
                    if (!result.isConfirmed) return;

                    fetch('', {
                            method: 'POST',
                            headers: {
                                'Content-Type': 'application/x-www-form-urlencoded'
                            },
                            body: `ajax=1&action=delete_mix_row&row_id=${rowId}`
                        })
                        .then(r => r.json())
                        .then(data => {
                            if (data.success) {
                                Swal.fire({
                                        icon: 'success',
                                        title: 'Eliminata!',
                                        timer: 800
                                    })
                                    .then(() => location.reload());
                            } else {
                                Swal.fire({
                                    icon: 'error',
                                    title: 'Errore',
                                    text: data.message
                                });
                            }
                        });
                });
            });

        });
    </script>
</body>

</html>