<?php

require_once __DIR__ . '/auth_check.php';

mnt_require_permission('maintenance.manage');

try {
    $pdo = mnt_pdo();

    $id                = (int)($_POST['id'] ?? 0);
    $name              = trim((string)($_POST['name'] ?? ''));
    $categoryId        = (int)($_POST['category_id'] ?? 0);
    $lineId            = (int)($_POST['line_id'] ?? 0);
    $registration      = trim((string)($_POST['registration_number'] ?? ''));
    $serial            = trim((string)($_POST['serial_number'] ?? ''));
    $batchLot          = trim((string)($_POST['batch_lot'] ?? ''));
    $manufacturer      = trim((string)($_POST['manufacturer'] ?? ''));
    $purchaseDate      = trim((string)($_POST['purchase_date'] ?? ''));
    $commissioningDate = trim((string)($_POST['commissioning_date'] ?? ''));
    $toolType          = trim((string)($_POST['tool_type'] ?? ''));
    $status            = (string)($_POST['status'] ?? 'active');
    $departmentId      = (int)($_POST['department_id'] ?? 0);
    $location          = trim((string)($_POST['location'] ?? ''));
    $description       = trim((string)($_POST['description'] ?? ''));
    $notes             = trim((string)($_POST['notes'] ?? ''));

    if ($name === '') {
        mnt_json_fail('Il nome è obbligatorio.');
    }
    if ($categoryId <= 0) {
        mnt_json_fail('La categoria è obbligatoria.');
    }
    if (!array_key_exists($status, mnt_equipment_statuses())) {
        mnt_json_fail('Stato non valido.');
    }

    // A category flagged requires_line must carry a production line
    $stmt = $pdo->prepare("SELECT requires_line FROM inv_categories WHERE id = ?");
    $stmt->execute([$categoryId]);
    $requiresLine = $stmt->fetchColumn();

    if ($requiresLine === false) {
        mnt_json_fail('Categoria inesistente.');
    }
    if ((int)$requiresLine === 1 && $lineId <= 0) {
        mnt_json_fail('Per questa categoria la linea di produzione è obbligatoria.');
    }

    $values = [
        'name'                => $name,
        'category_id'         => $categoryId,
        'line_id'             => $lineId ?: null,
        'registration_number' => $registration ?: null,
        'serial_number'       => $serial ?: null,
        'batch_lot'           => $batchLot ?: null,
        'manufacturer'        => $manufacturer ?: null,
        'purchase_date'       => $purchaseDate ?: null,
        'commissioning_date'  => $commissioningDate ?: null,
        'tool_type'           => $toolType ?: null,
        'status'              => $status,
        'department_id'       => $departmentId ?: null,
        'location'            => $location ?: null,
        'description'         => $description ?: null,
        'notes'               => $notes ?: null,
    ];

    if ($id > 0) {
        $assignments = [];
        foreach (array_keys($values) as $column) {
            $assignments[] = "$column = :$column";
        }

        $stmt = $pdo->prepare("UPDATE inv_equipment SET " . implode(', ', $assignments) . " WHERE id = :id");
        $stmt->execute($values + ['id' => $id]);

        mnt_log($pdo, 'equipment_updated', $id, null, null, $currentUserId, $values);
        mnt_json_ok(['id' => $id]);
    }

    $columns = array_keys($values);
    $placeholders = array_map(fn($column) => ':' . $column, $columns);

    $stmt = $pdo->prepare(
        "INSERT INTO inv_equipment (" . implode(', ', $columns) . ", created_by)
         VALUES (" . implode(', ', $placeholders) . ", :created_by)"
    );
    $stmt->execute($values + ['created_by' => $currentUserId]);

    $newId = (int)$pdo->lastInsertId();
    mnt_log($pdo, 'equipment_created', $newId, null, null, $currentUserId, $values);

    mnt_json_ok(['id' => $newId]);
} catch (Throwable $e) {
    mnt_json_fail('Errore: ' . $e->getMessage());
}