<?php
/* Copyright (C) 2026      Eduard Wisch    <data@data-it-solution.de>
 *
 * Stundenzettel - Business Object Klasse
 */

require_once DOL_DOCUMENT_ROOT.'/core/class/commonobject.class.php';

/**
 * Class Stundenzettel
 */
class Stundenzettel extends CommonObject
{
    /**
     * @var string ID to identify managed object
     */
    public $element = 'stundenzettel';

    /**
     * @var string Name of table without prefix
     */
    public $table_element = 'stundenzettel';

    /**
     * @var string Picto
     */
    public $picto = 'clock';

    // Status constants
    const STATUS_DRAFT = 0;
    const STATUS_VALIDATED = 1;
    const STATUS_INVOICED = 2;
    const STATUS_CANCELED = 9;

    /**
     * @var string Ref
     */
    public $ref;

    /**
     * @var int Auftrag ID
     */
    public $fk_commande;

    /**
     * @var int Rechnung ID (nach Übertrag)
     */
    public $fk_facture;

    /**
     * @var int Kunde ID
     */
    public $fk_soc;

    /**
     * @var int Ersteller
     */
    public $fk_user_author;

    /**
     * @var int Freigebender User
     */
    public $fk_user_valid;

    /**
     * @var int|string Datum des Stundenzettels
     */
    public $date_stundenzettel;

    /**
     * @var int|string Erstelldatum
     */
    public $datec;

    /**
     * @var int|string Freigabedatum
     */
    public $date_valid;

    /**
     * @var int Status
     */
    public $status;

    /**
     * @var string Private Notizen
     */
    public $note_private;

    /**
     * @var string Öffentliche Notizen
     */
    public $note_public;

    /**
     * @var array Leistungen
     */
    public $leistungen = array();

    /**
     * @var array Produkte
     */
    public $products = array();

    /**
     * @var array Notizen (abhakbare Merkzettel)
     */
    public $notes = array();

    /**
     * Constructor
     *
     * @param DoliDB $db Database handler
     */
    public function __construct($db)
    {
        $this->db = $db;
    }

    /**
     * Create object into database
     *
     * @param User $user User that creates
     * @param bool $notrigger false=launch triggers after, true=disable triggers
     * @return int <0 if KO, Id of created object if OK
     */
    public function create($user, $notrigger = false)
    {
        global $conf;

        $error = 0;

        // Generate ref
        if (empty($this->ref)) {
            $this->ref = $this->getNextNumRef();
        }

        $this->db->begin();

        $sql = "INSERT INTO ".MAIN_DB_PREFIX.$this->table_element." (";
        $sql .= "ref, entity, fk_commande, fk_soc, fk_user_author,";
        $sql .= "date_stundenzettel, datec, status, note_private, note_public";
        $sql .= ") VALUES (";
        $sql .= "'".$this->db->escape($this->ref)."',";
        $sql .= ((int)$conf->entity).",";
        $sql .= ((int)$this->fk_commande).",";
        $sql .= ((int)$this->fk_soc).",";
        $sql .= ((int)$user->id).",";
        $sql .= "'".$this->db->idate($this->date_stundenzettel)."',";
        $sql .= "'".$this->db->idate(dol_now())."',";
        $sql .= "0,"; // STATUS_DRAFT
        $sql .= ($this->note_private ? "'".$this->db->escape($this->note_private)."'" : "NULL").",";
        $sql .= ($this->note_public ? "'".$this->db->escape($this->note_public)."'" : "NULL");
        $sql .= ")";

        dol_syslog(get_class($this)."::create", LOG_DEBUG);
        $resql = $this->db->query($sql);
        if (!$resql) {
            $error++;
            $this->errors[] = "Error ".$this->db->lasterror();
        }

        if (!$error) {
            $this->id = $this->db->last_insert_id(MAIN_DB_PREFIX.$this->table_element);
        }

        if (!$error) {
            $this->db->commit();
            return $this->id;
        } else {
            $this->db->rollback();
            return -1;
        }
    }

    /**
     * Load object in memory from the database
     *
     * @param int $id Id object
     * @param string $ref Ref
     * @return int <0 if KO, 0 if not found, >0 if OK
     */
    public function fetch($id, $ref = null)
    {
        $sql = "SELECT s.rowid, s.ref, s.entity, s.fk_commande, s.fk_facture, s.fk_soc,";
        $sql .= " s.fk_user_author, s.fk_user_valid, s.date_stundenzettel, s.datec,";
        $sql .= " s.date_valid, s.status, s.note_private, s.note_public, s.tms";
        $sql .= " FROM ".MAIN_DB_PREFIX.$this->table_element." as s";
        if ($ref) {
            $sql .= " WHERE s.ref = '".$this->db->escape($ref)."'";
        } else {
            $sql .= " WHERE s.rowid = ".((int)$id);
        }

        dol_syslog(get_class($this)."::fetch", LOG_DEBUG);
        $resql = $this->db->query($sql);
        if ($resql) {
            if ($this->db->num_rows($resql)) {
                $obj = $this->db->fetch_object($resql);

                $this->id = $obj->rowid;
                $this->ref = $obj->ref;
                $this->entity = $obj->entity;
                $this->fk_commande = $obj->fk_commande;
                $this->fk_facture = $obj->fk_facture;
                $this->fk_soc = $obj->fk_soc;
                $this->fk_user_author = $obj->fk_user_author;
                $this->fk_user_valid = $obj->fk_user_valid;
                $this->date_stundenzettel = $this->db->jdate($obj->date_stundenzettel);
                $this->datec = $this->db->jdate($obj->datec);
                $this->date_valid = $this->db->jdate($obj->date_valid);
                $this->status = $obj->status;
                $this->note_private = $obj->note_private;
                $this->note_public = $obj->note_public;

                // Load lines
                $this->fetchLeistungen();
                $this->fetchProducts();
                $this->fetchNotes();

                return 1;
            } else {
                return 0;
            }
        } else {
            $this->error = "Error ".$this->db->lasterror();
            return -1;
        }
    }

    /**
     * Update object into database
     *
     * @param User $user User that modifies
     * @param bool $notrigger false=launch triggers after, true=disable triggers
     * @return int <0 if KO, >0 if OK
     */
    public function update($user, $notrigger = false)
    {
        $error = 0;

        $sql = "UPDATE ".MAIN_DB_PREFIX.$this->table_element." SET";
        $sql .= " date_stundenzettel = '".$this->db->idate($this->date_stundenzettel)."',";
        $sql .= " note_private = ".($this->note_private ? "'".$this->db->escape($this->note_private)."'" : "NULL").",";
        $sql .= " note_public = ".($this->note_public ? "'".$this->db->escape($this->note_public)."'" : "NULL");
        $sql .= " WHERE rowid = ".((int)$this->id);

        dol_syslog(get_class($this)."::update", LOG_DEBUG);
        $resql = $this->db->query($sql);
        if (!$resql) {
            $error++;
            $this->errors[] = "Error ".$this->db->lasterror();
        }

        if (!$error) {
            return 1;
        } else {
            return -1;
        }
    }

    /**
     * Validate object
     *
     * @param User $user User that validates
     * @return int <0 if KO, >0 if OK
     */
    public function validate($user)
    {
        $error = 0;

        $this->db->begin();

        $sql = "UPDATE ".MAIN_DB_PREFIX.$this->table_element." SET";
        $sql .= " status = ".self::STATUS_VALIDATED.",";
        $sql .= " fk_user_valid = ".((int)$user->id).",";
        $sql .= " date_valid = '".$this->db->idate(dol_now())."'";
        $sql .= " WHERE rowid = ".((int)$this->id);

        dol_syslog(get_class($this)."::validate", LOG_DEBUG);
        $resql = $this->db->query($sql);
        if (!$resql) {
            $error++;
            $this->errors[] = "Error ".$this->db->lasterror();
        }

        if (!$error) {
            $this->status = self::STATUS_VALIDATED;
            $this->fk_user_valid = $user->id;
            $this->date_valid = dol_now();

            // Update tracking table
            $this->updateTracking();

            $this->db->commit();
            return 1;
        } else {
            $this->db->rollback();
            return -1;
        }
    }

    /**
     * Set to draft
     *
     * @param User $user User that reopens
     * @return int <0 if KO, >0 if OK
     */
    public function setDraft($user)
    {
        $sql = "UPDATE ".MAIN_DB_PREFIX.$this->table_element." SET";
        $sql .= " status = ".self::STATUS_DRAFT.",";
        $sql .= " fk_user_valid = NULL,";
        $sql .= " date_valid = NULL";
        $sql .= " WHERE rowid = ".((int)$this->id);

        dol_syslog(get_class($this)."::setDraft", LOG_DEBUG);
        $resql = $this->db->query($sql);
        if ($resql) {
            $this->status = self::STATUS_DRAFT;
            return 1;
        } else {
            $this->error = "Error ".$this->db->lasterror();
            return -1;
        }
    }

    /**
     * Delete object in database
     *
     * @param User $user User that deletes
     * @param bool $notrigger false=launch triggers after, true=disable triggers
     * @return int <0 if KO, >0 if OK
     */
    public function delete($user, $notrigger = false)
    {
        $error = 0;

        $this->db->begin();

        // Delete notes
        $sql = "DELETE FROM ".MAIN_DB_PREFIX."stundenzettel_note WHERE fk_stundenzettel = ".((int)$this->id);
        $resql = $this->db->query($sql);
        if (!$resql) $error++;

        // Delete leistungen
        $sql = "DELETE FROM ".MAIN_DB_PREFIX."stundenzettel_leistung WHERE fk_stundenzettel = ".((int)$this->id);
        $resql = $this->db->query($sql);
        if (!$resql) $error++;

        // Delete products
        $sql = "DELETE FROM ".MAIN_DB_PREFIX."stundenzettel_product WHERE fk_stundenzettel = ".((int)$this->id);
        $resql = $this->db->query($sql);
        if (!$resql) $error++;

        // Delete main record
        if (!$error) {
            $sql = "DELETE FROM ".MAIN_DB_PREFIX.$this->table_element." WHERE rowid = ".((int)$this->id);
            $resql = $this->db->query($sql);
            if (!$resql) $error++;
        }

        if (!$error) {
            $this->db->commit();
            return 1;
        } else {
            $this->db->rollback();
            return -1;
        }
    }

    /**
     * Load leistungen
     *
     * @return int <0 if KO, number of lines if OK
     */
    public function fetchLeistungen()
    {
        $this->leistungen = array();

        $sql = "SELECT rowid, fk_user, date_leistung, time_start, time_end, duration, description, rang";
        $sql .= " FROM ".MAIN_DB_PREFIX."stundenzettel_leistung";
        $sql .= " WHERE fk_stundenzettel = ".((int)$this->id);
        $sql .= " ORDER BY rang, date_leistung, time_start";

        $resql = $this->db->query($sql);
        if ($resql) {
            while ($obj = $this->db->fetch_object($resql)) {
                $this->leistungen[] = $obj;
            }
            return count($this->leistungen);
        }
        return -1;
    }

    /**
     * Load products
     *
     * @return int <0 if KO, number of lines if OK
     */
    public function fetchProducts()
    {
        $this->products = array();

        // Produkte laden, bei Freitext-Produkten Beschreibung aus commandedet holen falls leer
        $sql = "SELECT sp.rowid, sp.fk_product, sp.fk_commandedet, sp.fk_manager_line,";
        $sql .= " sp.product_ref, sp.product_label,";
        $sql .= " CASE WHEN sp.description IS NULL OR sp.description = '' THEN cd.description ELSE sp.description END as description,";
        $sql .= " sp.qty_original, sp.qty_done, sp.qty_cumulated, sp.origin, sp.rang";
        $sql .= " FROM ".MAIN_DB_PREFIX."stundenzettel_product as sp";
        $sql .= " LEFT JOIN ".MAIN_DB_PREFIX."commandedet as cd ON cd.rowid = sp.fk_commandedet";
        $sql .= " WHERE sp.fk_stundenzettel = ".((int)$this->id);
        $sql .= " ORDER BY sp.rang";

        $resql = $this->db->query($sql);
        if ($resql) {
            while ($obj = $this->db->fetch_object($resql)) {
                $this->products[] = $obj;
            }
            return count($this->products);
        }
        return -1;
    }

    /**
     * Add a leistung
     *
     * @param User $user User
     * @param string $date Date
     * @param string $time_start Start time
     * @param string $time_end End time
     * @param string $description Description
     * @return int <0 if KO, >0 if OK
     */
    public function addLeistung($user, $date, $time_start = null, $time_end = null, $description = '')
    {
        global $langs;

        // Calculate duration
        $duration = 0;
        if ($time_start && $time_end) {
            $start = strtotime($time_start);
            $end = strtotime($time_end);
            $duration = ($end - $start) / 60; // in minutes
        }

        // Überlappungsprüfung: Prüfen ob für diese Zeit bereits eine Leistung existiert
        if ($time_start && $time_end) {
            $sqlCheck = "SELECT rowid, time_start, time_end FROM ".MAIN_DB_PREFIX."stundenzettel_leistung";
            $sqlCheck .= " WHERE fk_stundenzettel = ".((int)$this->id);
            $sqlCheck .= " AND time_start IS NOT NULL AND time_end IS NOT NULL";
            $resqlCheck = $this->db->query($sqlCheck);
            if ($resqlCheck) {
                $newStart = strtotime($time_start);
                $newEnd = strtotime($time_end);
                while ($objCheck = $this->db->fetch_object($resqlCheck)) {
                    $existStart = strtotime($objCheck->time_start);
                    $existEnd = strtotime($objCheck->time_end);
                    // Überlappung: Start1 < End2 UND Start2 < End1
                    if ($newStart < $existEnd && $existStart < $newEnd) {
                        $this->error = $langs->trans("ErrorTimeOverlap", $objCheck->time_start, $objCheck->time_end);
                        return -2;
                    }
                }
            }
        }

        // Get next rang
        $sql = "SELECT MAX(rang) as maxrang FROM ".MAIN_DB_PREFIX."stundenzettel_leistung WHERE fk_stundenzettel = ".((int)$this->id);
        $resql = $this->db->query($sql);
        $rang = 0;
        if ($resql) {
            $obj = $this->db->fetch_object($resql);
            $rang = $obj->maxrang + 1;
        }

        $sql = "INSERT INTO ".MAIN_DB_PREFIX."stundenzettel_leistung (";
        $sql .= "fk_stundenzettel, fk_user, date_leistung, time_start, time_end, duration, description, rang";
        $sql .= ") VALUES (";
        $sql .= ((int)$this->id).",";
        $sql .= ((int)$user->id).",";
        $sql .= "'".$this->db->idate($date)."',";
        $sql .= ($time_start ? "'".$this->db->escape($time_start)."'" : "NULL").",";
        $sql .= ($time_end ? "'".$this->db->escape($time_end)."'" : "NULL").",";
        $sql .= ((int)$duration).",";
        $sql .= "'".$this->db->escape($description)."',";
        $sql .= ((int)$rang);
        $sql .= ")";

        $resql = $this->db->query($sql);
        if ($resql) {
            return $this->db->last_insert_id(MAIN_DB_PREFIX."stundenzettel_leistung");
        }
        return -1;
    }

    /**
     * Update a leistung
     *
     * @param int $leistung_id Leistung ID
     * @param string $date Date
     * @param string $time_start Start time
     * @param string $time_end End time
     * @param string $description Description
     * @return int <0 if KO, >0 if OK
     */
    public function updateLeistung($leistung_id, $date, $time_start = null, $time_end = null, $description = '')
    {
        global $langs;

        // Calculate duration
        $duration = 0;
        if ($time_start && $time_end) {
            $start = strtotime($time_start);
            $end = strtotime($time_end);
            $duration = ($end - $start) / 60; // in minutes
        }

        // Überlappungsprüfung: Prüfen ob für diese Zeit bereits eine andere Leistung existiert
        if ($time_start && $time_end) {
            $sqlCheck = "SELECT rowid, time_start, time_end FROM ".MAIN_DB_PREFIX."stundenzettel_leistung";
            $sqlCheck .= " WHERE fk_stundenzettel = ".((int)$this->id);
            $sqlCheck .= " AND rowid != ".((int)$leistung_id); // Aktuelle Leistung ausschließen
            $sqlCheck .= " AND time_start IS NOT NULL AND time_end IS NOT NULL";
            $resqlCheck = $this->db->query($sqlCheck);
            if ($resqlCheck) {
                $newStart = strtotime($time_start);
                $newEnd = strtotime($time_end);
                while ($objCheck = $this->db->fetch_object($resqlCheck)) {
                    $existStart = strtotime($objCheck->time_start);
                    $existEnd = strtotime($objCheck->time_end);
                    // Überlappung: Start1 < End2 UND Start2 < End1
                    if ($newStart < $existEnd && $existStart < $newEnd) {
                        $this->error = $langs->trans("ErrorTimeOverlap", $objCheck->time_start, $objCheck->time_end);
                        return -2;
                    }
                }
            }
        }

        $sql = "UPDATE ".MAIN_DB_PREFIX."stundenzettel_leistung SET";
        $sql .= " date_leistung = '".$this->db->idate($date)."',";
        $sql .= " time_start = ".($time_start ? "'".$this->db->escape($time_start)."'" : "NULL").",";
        $sql .= " time_end = ".($time_end ? "'".$this->db->escape($time_end)."'" : "NULL").",";
        $sql .= " duration = ".((int)$duration).",";
        $sql .= " description = '".$this->db->escape($description)."'";
        $sql .= " WHERE rowid = ".((int)$leistung_id);
        $sql .= " AND fk_stundenzettel = ".((int)$this->id);

        $resql = $this->db->query($sql);
        if ($resql) {
            return 1;
        }
        $this->error = $this->db->lasterror();
        return -1;
    }

    /**
     * Delete a leistung
     *
     * @param int $leistung_id Leistung ID
     * @return int <0 if KO, >0 if OK
     */
    public function deleteLeistung($leistung_id)
    {
        $sql = "DELETE FROM ".MAIN_DB_PREFIX."stundenzettel_leistung";
        $sql .= " WHERE rowid = ".((int)$leistung_id);
        $sql .= " AND fk_stundenzettel = ".((int)$this->id);

        $resql = $this->db->query($sql);
        if ($resql) {
            return 1;
        }
        $this->error = $this->db->lasterror();
        return -1;
    }

    /**
     * Add a product
     *
     * @param int $fk_product Product ID
     * @param int $fk_commandedet Commandedet ID
     * @param int $fk_manager_line Manager line ID
     * @param float $qty_original Original qty
     * @param float $qty_done Done qty
     * @param string $origin Origin (order or added)
     * @param string $description Description (for free-text products)
     * @return int <0 if KO, >0 if OK
     */
    public function addProduct($fk_product, $fk_commandedet = null, $fk_manager_line = null, $qty_original = 0, $qty_done = 0, $origin = 'order', $description = '')
    {
        global $db;

        // Get product info
        $product_ref = '';
        $product_label = '';
        if ($fk_product > 0) {
            require_once DOL_DOCUMENT_ROOT.'/product/class/product.class.php';
            $prod = new Product($this->db);
            if ($prod->fetch($fk_product) > 0) {
                $product_ref = $prod->ref;
                $product_label = $prod->label;
            }
        }

        // Get next rang
        $sql = "SELECT MAX(rang) as maxrang FROM ".MAIN_DB_PREFIX."stundenzettel_product WHERE fk_stundenzettel = ".((int)$this->id);
        $resql = $this->db->query($sql);
        $rang = 0;
        if ($resql) {
            $obj = $this->db->fetch_object($resql);
            $rang = $obj->maxrang + 1;
        }

        $sql = "INSERT INTO ".MAIN_DB_PREFIX."stundenzettel_product (";
        $sql .= "fk_stundenzettel, fk_product, fk_commandedet, fk_manager_line,";
        $sql .= "product_ref, product_label, description, qty_original, qty_done, origin, rang";
        $sql .= ") VALUES (";
        $sql .= ((int)$this->id).",";
        $sql .= ($fk_product > 0 ? (int)$fk_product : "NULL").",";
        $sql .= ($fk_commandedet > 0 ? (int)$fk_commandedet : "NULL").",";
        $sql .= ($fk_manager_line > 0 ? (int)$fk_manager_line : "NULL").",";
        $sql .= "'".$this->db->escape($product_ref)."',";
        $sql .= "'".$this->db->escape($product_label)."',";
        $sql .= "'".$this->db->escape($description)."',";
        $sql .= ((float)$qty_original).",";
        $sql .= ((float)$qty_done).",";
        $sql .= "'".$this->db->escape($origin)."',";
        $sql .= ((int)$rang);
        $sql .= ")";

        $resql = $this->db->query($sql);
        if ($resql) {
            return $this->db->last_insert_id(MAIN_DB_PREFIX."stundenzettel_product");
        }
        return -1;
    }

    /**
     * Update product qty_done
     *
     * @param int $line_id Line ID
     * @param float $qty_done Done qty
     * @return int <0 if KO, >0 if OK
     */
    public function updateProductQty($line_id, $qty_done)
    {
        $sql = "UPDATE ".MAIN_DB_PREFIX."stundenzettel_product SET";
        $sql .= " qty_done = ".((float)$qty_done);
        $sql .= " WHERE rowid = ".((int)$line_id);
        $sql .= " AND fk_stundenzettel = ".((int)$this->id);

        $resql = $this->db->query($sql);
        return $resql ? 1 : -1;
    }

    /**
     * Delete product from stundenzettel
     *
     * @param int $line_id Line ID
     * @return int <0 if KO, >0 if OK
     */
    public function deleteProduct($line_id)
    {
        $sql = "DELETE FROM ".MAIN_DB_PREFIX."stundenzettel_product";
        $sql .= " WHERE rowid = ".((int)$line_id);
        $sql .= " AND fk_stundenzettel = ".((int)$this->id);

        $resql = $this->db->query($sql);
        return $resql ? 1 : -1;
    }

    /**
     * Update tracking table
     *
     * @return int <0 if KO, >0 if OK
     */
    public function updateTracking()
    {
        // Sum up all products for this order across all stundenzettels
        foreach ($this->products as $prod) {
            if (!$prod->fk_commandedet) continue;

            // Get total done qty for this commandedet
            $sql = "SELECT SUM(qty_done) as total_done FROM ".MAIN_DB_PREFIX."stundenzettel_product sp";
            $sql .= " JOIN ".MAIN_DB_PREFIX."stundenzettel s ON s.rowid = sp.fk_stundenzettel";
            $sql .= " WHERE sp.fk_commandedet = ".((int)$prod->fk_commandedet);
            $sql .= " AND s.status >= ".self::STATUS_VALIDATED;

            $resql = $this->db->query($sql);
            $total_done = 0;
            if ($resql && ($obj = $this->db->fetch_object($resql))) {
                $total_done = $obj->total_done;
            }

            // Update or insert tracking
            $sql = "SELECT rowid FROM ".MAIN_DB_PREFIX."stundenzettel_tracking";
            $sql .= " WHERE fk_commande = ".((int)$this->fk_commande);
            $sql .= " AND fk_commandedet = ".((int)$prod->fk_commandedet);

            $resql = $this->db->query($sql);
            if ($resql && $this->db->num_rows($resql) > 0) {
                // Update
                $obj = $this->db->fetch_object($resql);
                $remaining = $prod->qty_original - $total_done;
                $status = 'open';
                if ($total_done >= $prod->qty_original) {
                    $status = 'done';
                } elseif ($total_done > 0) {
                    $status = 'partial';
                }

                $sql = "UPDATE ".MAIN_DB_PREFIX."stundenzettel_tracking SET";
                $sql .= " qty_delivered = ".((float)$total_done).",";
                $sql .= " qty_remaining = ".((float)$remaining).",";
                $sql .= " status = '".$this->db->escape($status)."'";
                $sql .= " WHERE rowid = ".((int)$obj->rowid);
                $this->db->query($sql);
            } else {
                // Insert
                $sql = "INSERT INTO ".MAIN_DB_PREFIX."stundenzettel_tracking (";
                $sql .= "fk_commande, fk_product, fk_commandedet, fk_manager_line,";
                $sql .= "product_ref, product_label, qty_ordered, qty_delivered, qty_remaining, status";
                $sql .= ") VALUES (";
                $sql .= ((int)$this->fk_commande).",";
                $sql .= ($prod->fk_product > 0 ? (int)$prod->fk_product : "NULL").",";
                $sql .= ((int)$prod->fk_commandedet).",";
                $sql .= ($prod->fk_manager_line > 0 ? (int)$prod->fk_manager_line : "NULL").",";
                $sql .= "'".$this->db->escape($prod->product_ref)."',";
                $sql .= "'".$this->db->escape($prod->product_label)."',";
                $sql .= ((float)$prod->qty_original).",";
                $sql .= ((float)$total_done).",";
                $sql .= ((float)($prod->qty_original - $total_done)).",";
                $sql .= "'open'";
                $sql .= ")";
                $this->db->query($sql);
            }
        }

        return 1;
    }

    /**
     * Get next reference number
     *
     * @return string Next ref
     */
    public function getNextNumRef()
    {
        global $conf;

        $prefix = 'SZ';
        $year = date('Y');

        $sql = "SELECT MAX(CAST(SUBSTRING(ref, ".(strlen($prefix.$year.'-') + 1).") AS UNSIGNED)) as maxnum";
        $sql .= " FROM ".MAIN_DB_PREFIX.$this->table_element;
        $sql .= " WHERE ref LIKE '".$this->db->escape($prefix.$year)."-%'";
        $sql .= " AND entity = ".((int)$conf->entity);

        $resql = $this->db->query($sql);
        if ($resql) {
            $obj = $this->db->fetch_object($resql);
            $num = $obj->maxnum + 1;
        } else {
            $num = 1;
        }

        return $prefix.$year.'-'.sprintf('%05d', $num);
    }

    /**
     * Get status label
     *
     * @param int $mode 0=long label, 1=short label, 2=Picto + short label, 3=Picto, 4=Picto + long label, 5=Short label + Picto
     * @return string Label
     */
    public function getLibStatut($mode = 0)
    {
        return $this->LibStatut($this->status, $mode);
    }

    /**
     * Return label of status
     *
     * @param int $status Status
     * @param int $mode Mode
     * @return string Label
     */
    public function LibStatut($status, $mode = 0)
    {
        global $langs;
        $langs->load("stundenzettel@stundenzettel");

        if ($status == self::STATUS_DRAFT) {
            $statusType = 'status0';
            $label = $langs->trans("StatusDraft");
        } elseif ($status == self::STATUS_VALIDATED) {
            $statusType = 'status4';
            $label = $langs->trans("StatusValidated");
        } elseif ($status == self::STATUS_INVOICED) {
            $statusType = 'status6';
            $label = $langs->trans("StatusInvoiced");
        } elseif ($status == self::STATUS_CANCELED) {
            $statusType = 'status9';
            $label = $langs->trans("StatusCanceled");
        }

        return dolGetStatus($label, '', '', $statusType, $mode);
    }

    /**
     * Return URL link
     *
     * @param int $withpicto Picto
     * @param string $option Option
     * @return string Link
     */
    public function getNomUrl($withpicto = 0, $option = '')
    {
        $result = '';
        $url = dol_buildpath('/stundenzettel/card.php?id='.$this->id, 1);

        $label = '<u>'.$this->ref.'</u>';

        if ($withpicto) {
            $result .= img_object('', $this->picto, 'class="pictofixedwidth"');
        }
        $result .= '<a href="'.$url.'" title="'.dol_escape_htmltag($label).'">'.$this->ref.'</a>';

        return $result;
    }

    /**
     * Load notes (checkable memos)
     *
     * @return int <0 if KO, number of notes if OK
     */
    public function fetchNotes()
    {
        $this->notes = array();

        $sql = "SELECT rowid, fk_user, note, checked, rang, datec";
        $sql .= " FROM ".MAIN_DB_PREFIX."stundenzettel_note";
        $sql .= " WHERE fk_stundenzettel = ".((int)$this->id);
        $sql .= " ORDER BY rang, datec";

        $resql = $this->db->query($sql);
        if ($resql) {
            while ($obj = $this->db->fetch_object($resql)) {
                $this->notes[] = $obj;
            }
            return count($this->notes);
        }
        return -1;
    }

    /**
     * Add a note
     *
     * @param User $user User
     * @param string $note Note text
     * @return int <0 if KO, >0 if OK (rowid)
     */
    public function addNote($user, $note)
    {
        if (empty($note)) {
            return -1;
        }

        // Get next rang
        $sql = "SELECT MAX(rang) as maxrang FROM ".MAIN_DB_PREFIX."stundenzettel_note WHERE fk_stundenzettel = ".((int)$this->id);
        $resql = $this->db->query($sql);
        $rang = 0;
        if ($resql) {
            $obj = $this->db->fetch_object($resql);
            $rang = $obj->maxrang + 1;
        }

        $sql = "INSERT INTO ".MAIN_DB_PREFIX."stundenzettel_note (";
        $sql .= "fk_stundenzettel, fk_user, note, checked, rang, datec";
        $sql .= ") VALUES (";
        $sql .= ((int)$this->id).",";
        $sql .= ((int)$user->id).",";
        $sql .= "'".$this->db->escape($note)."',";
        $sql .= "0,"; // not checked
        $sql .= ((int)$rang).",";
        $sql .= "'".$this->db->idate(dol_now())."'";
        $sql .= ")";

        $resql = $this->db->query($sql);
        if ($resql) {
            return $this->db->last_insert_id(MAIN_DB_PREFIX."stundenzettel_note");
        }
        return -1;
    }

    /**
     * Update note checked status
     *
     * @param int $note_id Note ID
     * @param int $checked 0=unchecked, 1=checked
     * @return int <0 if KO, >0 if OK
     */
    public function updateNoteStatus($note_id, $checked)
    {
        $sql = "UPDATE ".MAIN_DB_PREFIX."stundenzettel_note SET";
        $sql .= " checked = ".((int)$checked);
        $sql .= " WHERE rowid = ".((int)$note_id);
        $sql .= " AND fk_stundenzettel = ".((int)$this->id);

        $resql = $this->db->query($sql);
        return $resql ? 1 : -1;
    }

    /**
     * Delete a note
     *
     * @param int $note_id Note ID
     * @return int <0 if KO, >0 if OK
     */
    public function deleteNote($note_id)
    {
        $sql = "DELETE FROM ".MAIN_DB_PREFIX."stundenzettel_note";
        $sql .= " WHERE rowid = ".((int)$note_id);
        $sql .= " AND fk_stundenzettel = ".((int)$this->id);

        $resql = $this->db->query($sql);
        return $resql ? 1 : -1;
    }

    /**
     * Get unchecked notes (for display on order page)
     *
     * @return array Array of unchecked notes
     */
    public function getUncheckedNotes()
    {
        $notes = array();

        $sql = "SELECT rowid, fk_user, note, rang, datec";
        $sql .= " FROM ".MAIN_DB_PREFIX."stundenzettel_note";
        $sql .= " WHERE fk_stundenzettel = ".((int)$this->id);
        $sql .= " AND checked = 0";
        $sql .= " ORDER BY rang, datec";

        $resql = $this->db->query($sql);
        if ($resql) {
            while ($obj = $this->db->fetch_object($resql)) {
                $notes[] = $obj;
            }
        }
        return $notes;
    }
}