# -*- mode: python -*-
# -*- coding: utf-8 -*-

##############################################################################
#
# Gestion scolarite IUT
#
# Copyright (c) 1999 - 2021 Emmanuel Viennet.  All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
#   Emmanuel Viennet      emmanuel.viennet@viennet.net
#
##############################################################################


""" Excel file handling
"""
import datetime
import io
import time
from enum import Enum
from tempfile import NamedTemporaryFile

from openpyxl import Workbook, load_workbook
from openpyxl.cell import WriteOnlyCell
from openpyxl.styles import Font, Border, Side, Alignment, PatternFill

import app.scodoc.sco_utils as scu
from app.scodoc import notesdb
from app.scodoc import sco_preferences
from app.scodoc.notes_log import log
from app.scodoc.sco_exceptions import ScoValueError


class COLORS(Enum):
    BLACK = "FF000000"
    WHITE = "FFFFFFFF"
    RED = "FFFF0000"
    BROWN = "FF993300"
    PURPLE = "FF993366"
    BLUE = "FF0000FF"
    ORANGE = "FFFF3300"
    LIGHT_YELLOW = "FFFFFF99"


def send_excel_file(request, data, filename, mime=scu.XLSX_MIMETYPE):
    """publication fichier.
    (on ne doit rien avoir émis avant, car ici sont générés les entetes)
    """
    filename = (
        scu.unescape_html(scu.suppress_accents(filename))
        .replace("&", "")
        .replace(" ", "_")
    )
    request.RESPONSE.setHeader("content-type", mime)
    request.RESPONSE.setHeader(
        "content-disposition", 'attachment; filename="%s"' % filename
    )
    return data


# Un style est enregistré comme un dictionnaire qui précise la valeur d'un attributdans la liste suivante:
# font, border, number_format, fill, ..  (cf https://openpyxl.readthedocs.io/en/stable/styles.html#working-with-styles)


#  (stolen from xlrd)
# Convert an Excel number (presumed to represent a date, a datetime or a time) into
# a Python datetime.datetime
# @param xldate The Excel number
# @param datemode 0: 1900-based, 1: 1904-based.
# @return a datetime.datetime object, to the nearest_second.
# <br>Special case: if 0.0 <= xldate < 1.0, it is assumed to represent a time;
# a datetime.time object will be returned.
# <br>Note: 1904-01-01 is not regarded as a valid date in the datemode 1 system; its "serial number"
# is zero.

_XLDAYS_TOO_LARGE = (2958466, 2958466 - 1462)  # This is equivalent to 10000-01-01


def xldate_as_datetime(xldate, datemode=0):
    if datemode not in (0, 1):
        raise ValueError("invalid mode %s" % datemode)
    if xldate == 0.00:
        return datetime.time(0, 0, 0)
    if xldate < 0.00:
        raise ValueError("invalid date code %s" % xldate)
    xldays = int(xldate)
    frac = xldate - xldays
    seconds = int(round(frac * 86400.0))
    assert 0 <= seconds <= 86400
    if seconds == 86400:
        seconds = 0
        xldays += 1
    if xldays >= _XLDAYS_TOO_LARGE[datemode]:
        raise ValueError("date too large %s" % xldate)

    if xldays == 0:
        # second = seconds % 60; minutes = seconds // 60
        minutes, second = divmod(seconds, 60)
        # minute = minutes % 60; hour    = minutes // 60
        hour, minute = divmod(minutes, 60)
        return datetime.time(hour, minute, second)

    if xldays < 61 and datemode == 0:
        raise ValueError("ambiguous date %s" % xldate)

    return datetime.datetime.fromordinal(
        xldays + 693594 + 1462 * datemode
    ) + datetime.timedelta(seconds=seconds)


class ScoExcelBook:
    """Permet la génération d'un classeur xlsx composé de plusieurs feuilles.
    usage:
        wb = ScoExcelBook()
        ws0 = wb.create_sheet('sheet name 0')
        ws1 = wb.create_sheet('sheet name 1')
        ...
        steam = wb.generate()
    """

    def __init__(self):
        self.sheets = []  # list of sheets

    def create_sheet(self, sheet_name="feuille", default_style=None):
        sheet = ScoExcelSheet(sheet_name, default_style)
        self.sheets.append(sheet)

    def generate(self):
        """génération d'un stream binaire représentant la totalité du classeur.
        retourne le flux
        """
        wb = Workbook(write_only=True)
        for sheet in self.sheets:
            sheet.generate(self)
        # construction d'un flux (https://openpyxl.readthedocs.io/en/stable/tutorial.html#saving-as-a-stream)
        with NamedTemporaryFile() as tmp:
            wb.save(tmp.name)
            tmp.seek(0)
            return tmp.read()


def excel_make_style(
    bold=False,
    italic=False,
    color: COLORS = COLORS.BLACK,
    bgcolor: COLORS = None,
    halign=None,
    valign=None,
    format_number=None,
):
    """Contruit un style.
    Les couleurs peuvent être spécfiées soit par une valeur de COLORS,
    soit par une chaine argb (exple "FF00FF00" pour le vert)
    color -- La couleur du texte
    bgcolor -- la couleur de fond
    halign -- alignement horizontal ("left", "right", "center")
    valign -- alignement vertical ("top", "bottom", "center")
    format_number -- formattage du contenu ("general", "@", ...)
    """
    style = {}
    font = Font(name="Arial", bold=bold, italic=italic, color=color.value)
    style["font"] = font
    if bgcolor:
        style["fill"] = PatternFill(fill_type="solid", bgColor=bgcolor.value)
    if halign or valign:
        al = Alignment()
        if halign:
            al.horz = {
                "left": "left",
                "right": "right",
                "center": "center",
            }[halign]
        if valign:
            al.vert = {
                "top": "top",
                "bottom": "bottom",
                "center": "center",
            }[valign]
        style["alignment"] = al
    if format_number is None:
        style["format_number"] = "general"
    else:
        style["format_number"] = format_number
    return style


class ScoExcelSheet:
    """Représente une feuille qui peut être indépendante ou intégrée dans un SCoExcelBook.
    En application des directives de la bibliothèque sur l'écriture optimisée, l'ordre des opérations
    est imposé:
    * instructions globales (largeur/maquage des colonnes et ligne, ...)
    * construction et ajout des cellules et ligne selon le sens de lecture (occidental)
    ligne de haut en bas et cellules de gauche à droite (i.e. A1, A2, .. B1, B2, ..)
    * pour finit appel de la méthode de génération
    """

    def __init__(self, sheet_name="feuille", default_style=None, wb=None):
        """Création de la feuille.
        sheet_name -- le nom de la feuille
        default_style -- le style par défaut des cellules
        wb -- le WorkBook dans laquelle se trouve la feuille. Si wb est None (cas d'un classeur mono-feuille),
         un workbook est crée et associé à cette feuille.
        """
        self.sheet_name = sheet_name
        self.rows = []  # list of list of cells
        # self.cells_styles_lico = {}  # { (li,co) : style }
        # self.cells_styles_li = {}  # { li : style }
        # self.cells_styles_co = {}  # { co : style }
        if default_style is None:
            default_style = excel_make_style()
        self.default_style = default_style
        self.wb = wb or Workbook(write_only=True)  # Création de workbook si nécessaire
        self.ws = self.wb.create_sheet(title=self.sheet_name)
        self.column_dimensions = {}

    def set_column_dimension_width(self, cle, value):
        """Détermine la largeur d'une colonne.
        cle -- identifie la colonne ("A"n "B", ...)
        value -- la dimension (unité : 7 pixels comme affiché dans Excel)
        """
        self.ws.column_dimensions[cle].width = value

    def set_column_dimension_hidden(self, cle, value):
        """Masque ou affiche une colonne.
        cle -- identifie la colonne ("A"n "B", ...)
        value -- boolean (vrai = colonne cachée)
        """
        self.ws.column_dimensions[cle].hidden = value

    def make_cell(self, value: any = None, style=None):
        """Construit une cellule.
        value -- contenu de la cellule (texte ou numérique)
        style -- style par défaut de la feuille si non spécifié
        """
        cell = WriteOnlyCell(self.ws, value or "")
        if style is None:
            style = self.default_style
        if "font" in style:
            cell.font = style["font"]
        if "border" in style:
            cell.border = style["border"]
        if "number_format" in style:
            cell.number_format = style["number_format"]
        if "fill" in style:
            cell.fill = style["fill"]
        if "alignment" in style:
            cell.alignment = style["alignment"]
        return cell

    def make_row(self, values: list, style):
        return [self.make_cell(value, style) for value in values]

    def append_single_cell_row(self, value: any, style=None):
        """construit une ligne composée d'une seule cellule et l'ajoute à la feuille.
        mêmes paramètres que make_cell:
        value -- contenu de la cellule (texte ou numérique)
        style -- style par défaut de la feuille si non spécifié
        """
        self.append_row([self.make_cell(value, style)])

    def append_blank_row(self):
        """construit une ligne vide et l'ajoute à la feuille."""
        self.append_row([None])

    def append_row(self, row):
        """ajoute une ligne déjà construite à la feuille."""
        self.rows.append(row)

    # def set_style(self, style=None, li=None, co=None):
    #     if li is not None and co is not None:
    #         self.cells_styles_lico[(li, co)] = style
    #     elif li is None:
    #         self.cells_styles_li[li] = style
    #     elif co is None:
    #         self.cells_styles_co[co] = style
    #
    # def get_cell_style(self, li, co):
    #     """Get style for specified cell"""
    #     return (
    #             self.cells_styles_lico.get((li, co), None)
    #             or self.cells_styles_li.get(li, None)
    #             or self.cells_styles_co.get(co, None)
    #             or self.default_style
    #     )

    def _generate_ws(self):
        """génére un flux décrivant la feuille.
        Ce flux pourra ensuite être repris dans send_excel_file (classeur mono feille)
        ou pour la génération d'un classeur multi-feuilles
        """
        for col in self.column_dimensions.keys():
            self.ws.column_dimensions[col] = self.column_dimensions[col]
        for row in self.rows:
            self.ws.append(row)

    def generate_standalone(self):
        """génération d'un classeur mono-feuille"""
        self._generate_ws()
        # construction d'un flux (https://openpyxl.readthedocs.io/en/stable/tutorial.html#saving-as-a-stream)
        with NamedTemporaryFile() as tmp:
            self.wb.save(tmp.name)
            tmp.seek(0)
            return tmp.read()

    def generate_embeded(self):
        """generation d'une feuille include dans un classeur multi-feuilles"""
        self._generate_ws()

    def gen_workbook(self, wb=None):
        """TODO: à remplacer"""
        """Generates and returns a workbook from stored data.
        If wb, add a sheet (tab) to the existing workbook (in this case, returns None).
        """
        if wb is None:
            wb = Workbook()  # Création du fichier
            sauvegarde = True
        else:
            sauvegarde = False
        ws0 = wb.add_sheet(self.sheet_name)
        li = 0
        for row in self.rows:
            co = 0
            for c in row:
                # safety net: allow only str, int and float
                # #py3 #sco8 A revoir lors de la ré-écriture de ce module
                # XXX if type(c) not in (IntType, FloatType):
                #    c = str(c).decode(scu.SCO_ENCODING)
                ws0.write(li, co, c, self.get_cell_style(li, co))
                co += 1
            li += 1
        if sauvegarde:
            return wb.savetostr()
        else:
            return None


def excel_simple_table(
    titles=None, lines=None, sheet_name=b"feuille", titles_styles=None
):
    """Export simple type 'CSV': 1ere ligne en gras, le reste tel quel"""
    ws = ScoExcelSheet(sheet_name)
    if titles is None:
        titles = []
    if lines is None:
        lines = [[]]
    if titles_styles is None:
        style = excel_make_style(bold=True)
        titles_styles = [style] * len(titles)
    # ligne de titres
    ws.append_row(
        [ws.make_cell(it, style) for (it, style) in zip(titles, titles_styles)]
    )
    default_style = excel_make_style()
    text_style = excel_make_style(format_number="@")
    for line in lines:
        cells = []
        for it in line:
            # safety net: allow only str, int and float
            #     TODO Plus de type Long en Python 3 ?
            #     if isinstance(it, long):  # XXX
            #         it = int(it)  # assume all ScoDoc longs fits in int !
            cell_style = default_style
            if type(it) not in (int, float):  # XXX A REVOIR
                cell_style = text_style
            cells.append(ws.make_cell(it, cell_style))
        ws.append_row(cells)
    return ws.generate_standalone()


def excel_feuille_saisie(e, titreannee, description, lines):
    """Genere feuille excel pour saisie des notes.
    E: evaluation (dict)
    lines: liste de tuples
               (etudid, nom, prenom, etat, groupe, val, explanation)
    """
    sheet_name = "Saisie notes"
    ws = ScoExcelSheet(sheet_name)

    # ajuste largeurs colonnes (unite inconnue, empirique)
    ws.set_column_dimension_width("A", 11.0 / 7)  # codes
    # ws.set_column_dimension_hidden("A", True)  # codes
    ws.set_column_dimension_width("B", 164.00 / 7)  # noms
    ws.set_column_dimension_width("C", 109.0 / 7)  # prenoms
    ws.set_column_dimension_width("D", 164.0 / 7)  # groupes
    ws.set_column_dimension_width("E", 115.0 / 7)  # notes
    ws.set_column_dimension_width("F", 355.0 / 7)  # remarques

    # fontes
    font_base = Font(name="Arial", size=12)
    font_bold = Font(name="Arial", bold=True)
    font_italic = Font(name="Arial", size=12, italic=True, color=COLORS.RED.value)
    font_titre = Font(name="Arial", bold=True, size=14)
    font_purple = Font(name="Arial", color=COLORS.PURPLE.value)
    font_brown = Font(name="Arial", color=COLORS.BROWN.value)
    font_blue = Font(name="Arial", size=9, color=COLORS.BLUE.value)

    # bordures
    side_thin = Side(border_style="thin", color=COLORS.BLACK.value)
    border_top = Border(top=side_thin)
    border_right = Border(right=side_thin)

    # fonds
    fill_light_yellow = PatternFill(
        patternType="solid", fgColor=COLORS.LIGHT_YELLOW.value
    )

    # styles
    style = {"font": font_base}
    style_titres = {"font": font_titre}
    style_expl = {"font": font_italic}

    style_ro = {  # cells read-only
        "font": font_purple,
        "border": border_right,
    }
    style_dem = {
        "font": font_brown,
        "border": border_top,
    }
    style_nom = {  # style pour nom, prenom, groupe
        "font": font_base,
        "border": border_top,
    }
    style_notes = {
        "font": font_bold,
        "number_format": "general",
        "fill": fill_light_yellow,
        "border": border_top,
    }
    style_comment = {
        "font": font_blue,
        "border": border_top,
    }

    # ligne de titres
    ws.append_single_cell_row(
        "Feuille saisie note (à enregistrer au format excel)", style_titres
    )
    # lignes d'instructions
    ws.append_single_cell_row(
        "Saisir les notes dans la colonne E (cases jaunes)", style_expl
    )
    ws.append_single_cell_row("Ne pas modifier les cases en mauve !", style_expl)
    # Nom du semestre
    ws.append_single_cell_row(scu.unescape_html(titreannee), style_titres)
    # description evaluation
    ws.append_single_cell_row(scu.unescape_html(description), style_titres)
    ws.append_single_cell_row(
        "Evaluation du %s (coef. %g)" % (e["jour"], e["coefficient"]), style
    )
    # ligne blanche
    ws.append_blank_row()
    # code et titres colonnes
    ws.append_row(
        [
            ws.make_cell("!%s" % e["evaluation_id"], style_ro),
            ws.make_cell("Nom", style_titres),
            ws.make_cell("Prénom", style_titres),
            ws.make_cell("Groupe", style_titres),
            ws.make_cell("Note sur %g" % e["note_max"], style_titres),
            ws.make_cell("Remarque", style_titres),
        ]
    )

    # etudiants
    for line in lines:
        st = style_nom
        if line[3] != "I":
            st = style_dem
            if line[3] == "D":  # demissionnaire
                s = "DEM"
            else:
                s = line[3]  # etat autre
        else:
            s = line[4]  # groupes TD/TP/...
        try:
            val = float(line[5])
        except ValueError:
            val = line[5]
        ws.append_row(
            [
                ws.make_cell("!" + line[0], style_ro),  # code
                ws.make_cell(line[1], st),
                ws.make_cell(line[2], st),
                ws.make_cell(s, st),
                ws.make_cell(val, style_notes),  # note
                ws.make_cell(line[6], style_comment),  # comment
            ]
        )

    # explication en bas
    ws.append_row([None, ws.make_cell("Code notes", style_titres)])
    ws.append_row(
        [
            None,
            ws.make_cell("ABS", style_expl),
            ws.make_cell("absent (0)", style_expl),
        ]
    )
    ws.append_row(
        [
            None,
            ws.make_cell("EXC", style_expl),
            ws.make_cell("pas prise en compte", style_expl),
        ]
    )
    ws.append_row(
        [
            None,
            ws.make_cell("ATT", style_expl),
            ws.make_cell("en attente", style_expl),
        ]
    )
    ws.append_row(
        [
            None,
            ws.make_cell("SUPR", style_expl),
            ws.make_cell("pour supprimer note déjà entrée", style_expl),
        ]
    )
    ws.append_row(
        [
            None,
            ws.make_cell("", style_expl),
            ws.make_cell("cellule vide -> note non modifiée", style_expl),
        ]
    )
    return ws.generate_standalone()


def excel_bytes_to_list(bytes_content):
    filelike = io.BytesIO(bytes_content)
    return _excel_to_list(filelike)


def excel_file_to_list(filename):
    return _excel_to_list(filename)


def _excel_to_list(filelike):  # we may need 'encoding' argument ?
    """returns list of list
    convert_to_string is a conversion function applied to all non-string values (ie numbers)
    """
    try:
        wb = load_workbook(filename=filelike, read_only=True, data_only=True)
    except:
        log("Excel_to_list: failure to import document")
        open("/tmp/last_scodoc_import_failure" + scu.XLSX_SUFFIX, "w").write(filelike)
        raise ScoValueError(
            "Fichier illisible: assurez-vous qu'il s'agit bien d'un document Excel !"
        )
    diag = []  # liste de chaines pour former message d'erreur
    # n'utilise que la première feuille
    if len(wb.get_sheet_names()) < 1:
        diag.append("Aucune feuille trouvée dans le classeur !")
        return diag, None
    if len(wb.get_sheet_names()) > 1:
        diag.append("Attention: n'utilise que la première feuille du classeur !")
    # fill matrix
    sheet_name = wb.get_sheet_names()[0]
    ws = wb.get_sheet_by_name(sheet_name)
    sheet_name = sheet_name.encode(scu.SCO_ENCODING, "backslashreplace")
    values = {}
    for row in ws.iter_rows():
        for cell in row:
            if cell.value is not None:
                values[(cell.row - 1, cell.column - 1)] = str(cell.value)
    if not values:
        diag.append(
            "Aucune valeur trouvée dans la feuille %s !"
            % sheet_name.decode(scu.SCO_ENCODING)
        )
        return diag, None
    indexes = list(values.keys())
    # search numbers of rows and cols
    rows = [x[0] for x in indexes]
    cols = [x[1] for x in indexes]
    nbcols = max(cols) + 1
    nbrows = max(rows) + 1
    m = []
    for _ in range(nbrows):
        m.append([""] * nbcols)

    for row_idx, col_idx in indexes:
        v = values[(row_idx, col_idx)]
        # if isinstance(v, six.text_type):
        #     v = v.encode(scu.SCO_ENCODING, "backslashreplace")
        # elif convert_to_string:
        #     v = convert_to_string(v)
        m[row_idx][col_idx] = v
    diag.append(
        'Feuille "%s", %d lignes' % (sheet_name.decode(scu.SCO_ENCODING), len(m))
    )
    # diag.append(str(M))
    #
    return diag, m


def excel_feuille_listeappel(
    sem,
    groupname,
    lines,
    partitions=None,
    with_codes=False,
    with_paiement=False,
    server_name=None,
):
    """generation feuille appel"""
    if partitions is None:
        partitions = []
    formsemestre_id = sem["formsemestre_id"]
    sheet_name = "Liste " + groupname

    ws = ScoExcelSheet(sheet_name)
    ws.set_column_dimension_width("A", 3)
    ws.set_column_dimension_width("B", 35)
    ws.set_column_dimension_width("C", 12)

    font1 = Font(name="Arial", size=11)
    font1i = Font(name="Arial", size=10, italic=True)
    font1b = Font(name="Arial", size=11, bold=True)

    side_thin = Side(border_style="thin", color=COLORS.BLACK.value)

    border_tbl = Border(top=side_thin, bottom=side_thin, left=side_thin)
    border_tblr = Border(
        top=side_thin, bottom=side_thin, left=side_thin, right=side_thin
    )

    style1i = {
        "font": font1i,
    }

    style1b = {
        "font": font1,
        "border": border_tbl,
    }

    style2 = {
        "font": Font(name="Arial", size=14),
    }

    style2b = {
        "font": font1i,
        "border": border_tblr,
    }

    style2t3 = {
        "border": border_tblr,
    }

    style2t3bold = {
        "font": font1b,
        "border": border_tblr,
    }

    style3 = {
        "font": Font(name="Arial", bold=True, size=14),
    }

    nb_weeks = 4  # nombre de colonnes pour remplir absences

    # ligne 1
    title = "%s %s (%s - %s)" % (
        sco_preferences.get_preference("DeptName", formsemestre_id),
        notesdb.unquote(sem["titre_num"]),
        sem["date_debut"],
        sem["date_fin"],
    )

    ws.append_row([None, ws.make_cell(title, style2)])

    # ligne 2
    ws.append_row([None, ws.make_cell("Discipline :", style2)])

    # ligne 3
    cell_2 = ws.make_cell("Enseignant :", style2)
    cell_6 = ws.make_cell(("Groupe %s" % groupname), style3)
    ws.append_row([None, cell_2, None, None, None, None, cell_6])

    # ligne 4: Avertissement pour ne pas confondre avec listes notes
    cell_2 = ws.make_cell(
        "Ne pas utiliser cette feuille pour saisir les notes !", style1i
    )
    ws.append_row([None, None, cell_2])

    ws.append_blank_row()
    ws.append_blank_row()

    # ligne 7: Entête (contruction dans une liste cells)
    cell_2 = ws.make_cell("Nom", style3)
    cells = [None, cell_2]
    for partition in partitions:
        cells.append(ws.make_cell(partition["partition_name"], style3))
    if with_codes:
        cells.append(ws.make_cell("etudid", style3))
        cells.append(ws.make_cell("code_nip", style3))
        cells.append(ws.make_cell("code_ine", style3))
    for i in range(nb_weeks):
        cells.append(ws.make_cell("", style2b))
    ws.append_row(cells)

    n = 0
    # pour chaque étudiant
    for t in lines:
        n += 1
        nomprenom = (
            t["civilite_str"]
            + " "
            + t["nom"]
            + " "
            + scu.strcapitalize(scu.strlower(t["prenom"]))
        )
        style_nom = style2t3
        if with_paiement:
            paie = t.get("paiementinscription", None)
            if paie is None:
                nomprenom += " (inscription ?)"
                style_nom = style2t3bold
            elif not paie:
                nomprenom += " (non paiement)"
                style_nom = style2t3bold
        cell_1 = ws.make_cell(n, style1b)
        cell_2 = ws.make_cell(nomprenom, style_nom)
        cells = [cell_1, cell_2]

        for partition in partitions:
            if partition["partition_name"]:
                cells.append(
                    ws.make_cell(t.get(partition["partition_id"], ""), style2t3)
                )
        if with_codes:
            cells.append(ws.make_cell(t["etudid"], style2t3))
            code_nip = t.get("code_nip", "")
            cells.append(ws.make_cell(code_nip, style2t3))
            code_ine = t.get("code_ine", "")
            cells.append(ws.make_cell(code_ine, style2t3))
        cells.append(ws.make_cell(t.get("etath", ""), style2b))
        for i in range(1, nb_weeks):
            cells.append(ws.make_cell(style=style2t3))
        ws.append_row(cells)

    ws.append_blank_row()

    # bas de page (date, serveur)
    dt = time.strftime("%d/%m/%Y à %Hh%M")
    if server_name:
        dt += " sur " + server_name
    cell_2 = ws.make_cell(("Liste éditée le " + dt), style1i)
    ws.append_row([None, cell_2])

    return ws.generate_standalone()