#!/usr/bin/python

from datetime import timedelta
from datetime import date
import locale

start_year = 2020
start_date = date(start_year, 01, 01)
end_date = date(start_year, 12, 31)


def main():
    # german
    locale.setlocale(locale.LC_TIME, "de_DE")

    fd = open("calender.tex", "w")
    tex_write_header(fd)

    tex_write_calender_overview(fd)

    tex_write_weekly(fd)

    tex_write_footer(fd)


def tex_write_header(fd):
    # \usepackage{fontspec}{}
    fd.write('''
\\documentclass[12pt,twoside]{scrartcl}
%%%%%%%%
%
% Latex-Vorlage fuer einen eigenen Wochenkalender
% Author Philipp Schoenberger

\\usepackage[german, english]{babel}
\\usepackage[labelformat=empty]{caption}
\\usepackage{mathtools}
\\usepackage{xcolor}
\\usepackage{textcomp}
\\usepackage{marvosym}
\\usepackage[clock]{ifsym}
\\usepackage{geometry}
 \\geometry{
    a5paper,
    left=10mm,
    top=10mm,
}

\\newcommand\\myhrulefill[2][0pt]{\\leavevmode\\leaders\\hrule height #2 depth #1\\hfill\\kern0pt}


\\begin{document}{}
''')


def tex_write_footer(fd):
    fd.write('''
\\end{document}
''')


def tex_write_calender_overview(fd):
    fd.write('''

\\thispagestyle{empty}
\\vspace*{-2em}
%\\renewcommand{\\arraystretch}{0.9}
%\\setlength{\\tabcolsep}{0.9mm}
\\begin{center}
\\Huge\\textbf{Jahres\\"ubersicht\\ ''')
    fd.write(str(start_year))
    fd.write('''}
\\end{center}
%%%%%%%%%%%%%%%%%%%%%%%%%%%
% begin overview calender
\\renewcommand{\\arraystretch}{1.0}
\\setlength{\\tabcolsep}{0.9mm}
''')
    for month in range(1, 12 + 1):
        m = date(start_year, month, 01)

        if (month - 1) % 2 == 0:
            fd.write('\\ \\newline\n\r')

        fd.write('''\\begin{minipage}[t]{0.5\\textwidth}
            \\centering
            ''')
        fd.write('\\textbf{\\large ' + m.strftime('%B') + '} ')
        fd.write('''\\\\
            \\vspace{3mm}
            \\tiny
            \\begin{tabular}{ccccc|cc||}
            ''')

        # print weeknames
        for i in range(0, 6 + 1):
            curr_date = date(start_year, month, 01)
            curr_date = curr_date + timedelta(days=i - curr_date.weekday())

            fd.write('\\textbf{' + curr_date.strftime('%a') + '} ')
            if i == 6:
                fd.write('\\\\\n\r')
            else:
                fd.write(' & ')

        fd.write('\\hline')

        curr_date = date(start_year, month, 01)
        weekline = "            " + "  &" * curr_date.weekday()
        next_date = curr_date
        while curr_date.month == next_date.month:
            curr_date = next_date
            next_date = curr_date + timedelta(days=1)

            weekline = weekline + " " + str(curr_date.day)
            if (curr_date.weekday() == 6):  # sunday
                weekline = weekline + "\\\\\n\r             "
            else:
                weekline = weekline + "&"

        weekline = weekline + ("  &" * (5 - curr_date.weekday())) + "\\\\\n\r"

        fd.write(weekline)

        fd.write('''
            \\end{tabular}
        \\end{minipage}''')
        # if (month == 6):
        # fd.write('\\newpage\n\r')

    fd.write('''
% end overview calender
%%%%%%%%%%%%%%%%%%%%%%%%%%%
''')


def tex_write_weekly(fd):
    print_start_date = start_date - timedelta(days=start_date.weekday())
    print_end_date = end_date + timedelta(days=6 - end_date.weekday())

    print print_start_date.isoformat()
    print print_end_date.isoformat()

    fd.write('''
%%%%%%%%%%%%%%%%%%%%%%%%%%%
% begin real calender
\\flushleft
''')

    curr_date = print_start_date - timedelta(days=1)

    while True:
        next_date = curr_date + timedelta(days=1)
        if (print_end_date == next_date):
            break
        curr_date = next_date

        if curr_date.weekday() == 0:
            fd.write('' + curr_date.strftime('%B'))
            last_weekday = curr_date + timedelta(days=6)
            fd.write('~' + curr_date.strftime('%Y'))

            if (curr_date.month != last_weekday.month):
                fd.write(' \\/*')
                fd.write('~' + last_weekday.strftime('%Y'))
            fd.write('\\hrule')

        fd.write('''
    \\parbox[t][0.115\\paperheight]{\\textwidth}{
        \\flushleft
        \\textbf{
            \\small ''')
        fd.write('' + curr_date.strftime('%d'))
        fd.write(' - ')
        fd.write('' + curr_date.strftime('%A'))
        fd.write('''
        }
        \\hspace{5mm}~
        \\myhrulefill{0.5pt}
        \\linebreak
        \\noindent
        \\begin{minipage}[t][2.3cm]{0.48\\textwidth}
            \\hspace*{1.2cm} ~
        \\end{minipage}
        \\begin{minipage}[t][6.1cm]{0.48\\textwidth}
            \\begin{flushright}
                ~
            \\end{flushright}
        \\end{minipage}
    }
''')

        # start new page if sunday
        if curr_date.weekday() == 6:
            fd.write('\\newpage\n\r')
            for i in range(1, 18):
                fd.write('\\hspace{8mm}\n\r')
                fd.write('\\myhrulefill{0.5pt}\n\r')
            fd.write('\\newpage\n\r')

    fd.write('''
% end real calender
%%%%%%%%%%%%%%%%%%%%%%%%%%%
    ''')


if __name__ == "__main__":
    main()