from random import choice
from string import digits, ascii_letters
from flask_security import current_user

from advlabdb.models import Semester

def makeTable(headerAndDataList, rows, tableId="table"):
    def cellString(cell):
        cell = str(cell)
        if cell == "[]":
            return "<em>None</em>"

        excludeChars = """<>"'[]"""
        for c in excludeChars:
            if c in cell:
                cell = cell.replace(c, "")
        return cell

    def td(cell):
        return '<td>' + cellString(cell) + '</td>'

    def th(cell):
        return '<th data-sortable="true" data-field="' + titleToTemplate(cell) + '">' + cellString(cell) + '</th>'

    table = '''<table
id="''' + tableId + '''"
data-classes="table table-bordered table-striped"
data-toggle="table"
data-thead-classes="table-dark"
data-search="true"
data-show-toggle="true"
data-show-columns="true"
data-click-to-select="true"
data-show-export="true"
data-export-types="['json', 'xml', 'csv', 'txt', 'sql', 'pdf']">
<thead>
<tr>
<th data-field="state" data-checkbox="true"></th>'''
    for i in headerAndDataList:
        table += th(i[0])
    table += '''</tr>
</thead>
<tbody>\n'''

    for row in rows:
        table += '<tr><td></td>'

        for i in headerAndDataList:
            table += td(eval(i[1]))

        table += '</tr>\n'

    table += '''</tbody>
</table>
<br>
<hr>
<br>'''
    return table


def appointmentDate(date):
    return date.strftime("%a %d.%m.%Y")


def randomPassword():
    return ''.join(choice(ascii_letters + digits) for i in range(12))


def titleToTemplate(page):
    return page.lower().replace(" ", "_")


def userActiveSemester():
    lastSemesterId = Semester.query.all()[-1].id
    if current_user.active_semester_id is None:
        current_user.active_semester_id = lastSemesterId
    elif current_user.active_semester_id != lastSemesterId:
        activeSemester = Semester.query.get(current_user.active_semester_id)
        if activeSemester:
            flash(f"You are in the old semester {activeSemester.label}!", "warning")
        else:
            flash(f"Semester changed!", "warning")
            current_user.active_semester_id = lastSemesterId
    return Semester.query.get(current_user.active_semester_id)