from cgi import escape

from django.utils.translation import ugettext as _
from reportlab.graphics.barcode.qr import QrCodeWidget
from reportlab.graphics.shapes import Drawing
from reportlab.lib import colors
from reportlab.lib.units import cm
from reportlab.platypus import (
    LongTable,
    PageBreak,
    Paragraph,
    Spacer,
    Table,
    TableStyle,
)

from ..core.config import config
from ..utils.pdf import stylesheet
from .models import User


def users_to_pdf(pdf):
    """
    Create a list of all users as PDF.
    """
    data = [['#', _('Name'), _('Structure level'), _('Group')]]
    sort = 'first_name'
    counter = 0
    for user in User.objects.all().order_by(sort):
        counter += 1
        groups = ''
        for group in user.groups.all():
            if group.pk != 2:
                groups += "%s<br/>" % escape(_(group.name))
        if sort == 'last_name':
            name = "%s" % escape(user.last_name)
            if user.first_name:
                name = "%s, %s" % (name, escape(user.first_name))
        else:
            name = "%s %s" % (escape(user.first_name), escape(user.last_name))
        if user.title:
            name = "%s %s" % (user.title, name)
        if user.number:
            name = "%s<br/>%s" % (name, user.number)
        data.append([
            counter,
            Paragraph(name, stylesheet['Tablecell']),
            Paragraph(escape(user.structure_level), stylesheet['Tablecell']),
            Paragraph(groups, stylesheet['Tablecell'])])
    t = LongTable(data, style=[
        ('VALIGN', (0, 0), (-1, -1), 'TOP'),
        ('LINEABOVE', (0, 0), (-1, 0), 2, colors.black),
        ('LINEABOVE', (0, 1), (-1, 1), 1, colors.black),
        ('LINEBELOW', (0, -1), (-1, -1), 2, colors.black),
        ('ROWBACKGROUNDS', (0, 1), (-1, -1),
            (colors.white, (.9, .9, .9)))])
    t._argW[0] = 0.75 * cm
    pdf.append(t)
    return pdf


def users_passwords_to_pdf(pdf):
    """
    Create access data sheets for all users as PDF.
    """
    users_pdf_wlan_ssid = config["users_pdf_wlan_ssid"] or "-"
    users_pdf_wlan_password = config["users_pdf_wlan_password"] or "-"
    users_pdf_wlan_encryption = config["users_pdf_wlan_encryption"] or "-"
    users_pdf_url = config["users_pdf_url"] or "-"
    users_pdf_welcometitle = config["users_pdf_welcometitle"]
    users_pdf_welcometext = config["users_pdf_welcometext"]

    sort = 'first_name'
    qrcode_size = 2 * cm
    # qrcode for system url
    qrcode_url = QrCodeWidget(users_pdf_url)
    qrcode_url.barHeight = qrcode_size
    qrcode_url.barWidth = qrcode_size
    qrcode_url.barBorder = 0
    qrcode_url_draw = Drawing(45, 45)
    qrcode_url_draw.add(qrcode_url)
    # qrcode for wlan
    text = "WIFI:S:%s;T:%s;P:%s;;" % (users_pdf_wlan_ssid, users_pdf_wlan_encryption, users_pdf_wlan_password)
    qrcode_wlan = QrCodeWidget(text)
    qrcode_wlan.barHeight = qrcode_size
    qrcode_wlan.barWidth = qrcode_size
    qrcode_wlan.barBorder = 0
    qrcode_wlan_draw = Drawing(45, 45)
    qrcode_wlan_draw.add(qrcode_wlan)

    for user in User.objects.all().order_by(sort):
        pdf.append(Paragraph(escape(user.get_full_name()), stylesheet['h1']))
        pdf.append(Paragraph(escape(user.number), stylesheet['h3']))
        pdf.append(Spacer(0, 1 * cm))
        data = []
        # WLAN access data
        cell = []
        cell.append(Paragraph(_("WLAN access data"),
                    stylesheet['h2']))
        cell.append(Paragraph("%s:" % _("WLAN name (SSID)"),
                    stylesheet['formfield']))
        cell.append(Paragraph(escape(users_pdf_wlan_ssid),
                    stylesheet['formfield_value']))
        cell.append(Paragraph("%s:" % _("WLAN password"),
                    stylesheet['formfield']))
        cell.append(Paragraph(escape(users_pdf_wlan_password),
                    stylesheet['formfield_value']))
        cell.append(Paragraph("%s:" % _("WLAN encryption"),
                    stylesheet['formfield']))
        cell.append(Paragraph(escape(users_pdf_wlan_encryption),
                    stylesheet['formfield_value']))
        cell.append(Spacer(0, 0.5 * cm))
        # OpenSlides access data
        cell2 = []
        cell2.append(Paragraph(_("OpenSlides access data"),
                     stylesheet['h2']))
        cell2.append(Paragraph("%s:" % _("Username"),
                     stylesheet['formfield']))
        cell2.append(Paragraph(escape(user.username),
                     stylesheet['formfield_value']))
        cell2.append(Paragraph("%s:" % _("Initial password"),
                     stylesheet['formfield']))
        cell2.append(Paragraph(escape(user.default_password),
                     stylesheet['formfield_value']))
        cell2.append(Paragraph("URL:",
                     stylesheet['formfield']))
        cell2.append(Paragraph(escape(users_pdf_url),
                     stylesheet['formfield_value']))
        data.append([cell, cell2])
        # QRCodes
        cell = []
        if users_pdf_wlan_ssid != "-" and users_pdf_wlan_encryption != "-":
            cell.append(qrcode_wlan_draw)
            cell.append(Paragraph(_("Scan this QRCode to connect WLAN."),
                        stylesheet['qrcode_comment']))
        cell2 = []
        if users_pdf_url != "-":
            cell2.append(qrcode_url_draw)
            cell2.append(Paragraph(_("Scan this QRCode to open URL."),
                         stylesheet['qrcode_comment']))
        data.append([cell, cell2])
        # build table
        table = Table(data)
        table._argW[0] = 8 * cm
        table._argW[1] = 8 * cm
        table.setStyle(TableStyle([('VALIGN', (0, 0), (-1, -1), 'TOP')]))
        pdf.append(table)
        pdf.append(Spacer(0, 2 * cm))

        # welcome title and text
        pdf.append(Paragraph(escape(users_pdf_welcometitle), stylesheet['h2']))
        pdf.append(Paragraph(escape(users_pdf_welcometext).replace('\r\n', '<br/>'),
                   stylesheet['Paragraph12']))
        pdf.append(PageBreak())
    return pdf