#!/usr/bin/env python3 

import os
import shutil

### USAGE 



# from command line, yaml file or env vars
def parse_options(filename="anansesem.yaml"):
    import yaml 
    with open(filename) as stream: 
        try:
            conf=yaml.safe_load(stream)
        except yaml.YAMLError as exec:
            print(exec)
    return conf

# create tex files from md files
def md2tex(infile, outdir):
    intext=read(infile)
    outtext=exec("pandoc -i inifile -f md -t tex")

def convert_text_format(infiles, informat='md', outformat='tex'): # from md/adoc to html/tex # md2parallel
    for file in infiles: 
        if path(file) is not absolute: # os.path.isabs(my_path)

            path()+file 
        md2tex(infile, outfile)

def create_project_dir(conf):
    project=conf['project-options']['project']
    cwd=os.getcwd()
    if os.path.exists(project):
        shutil.rmtree(project) # https://stackoverflow.com/a/814170
#        print(project, "already exist. Please delete or move the folder")
#        exit(1)
    os.makedirs(project)
    return os.path.realpath(project) 

def create_skel(project_dir,conf):
    proj=conf['project-options']['project']
    os.makedirs(os.path.join(proj,'chapters'))
    # create makefile
    # r'' https://stackoverflow.com/a/46011113 
    # '{{{}}}'.format() https://stackoverflow.com/a/10112665
    makefile_content=r'''
basename := {project}
LATEX := {latex_engine}

test: $(basename).tex
	$(LATEX) $(basename).tex

full: $(basename).tex
	$(LATEX)  $(basename).tex
	$(LATEX)  $(basename).tex

clear: clean
	rm -f $(basename).pdf
clean: 
	ls | egrep "$(basename).[0-9]+" | xargs rm -f
	rm -f $(basename).*R \
		$(basename).Aend \
		$(basename).Bend \
		$(basename).Cend \
		$(basename).Dend \
		$(basename).Eend \
		$(basename).aux \
		$(basename).eled* \
		$(basename).eled* \
		$(basename).log \
		$(basename).maf \
		$(basename).mtc* \
		$(basename).glg \
		$(basename).glo \
		$(basename).gls \
		$(basename).ist \
		$(basename).mw \
		$(basename).toc
'''.format(project=conf['project-options']['project'], latex_engine=conf['latex-options']['latex-engine'])
    makefile_path=os.path.join(project_dir,'Makefile')
    with open(makefile_path, 'w') as makefile:  # https://www.geeksforgeeks.org/writing-to-file-in-python/#with-statement
        makefile.write(makefile_content)

    # create main latex file
    mainfile_content=r'''
\documentclass[twoside,{pagesize}paper]{{memoir}}
\usepackage[fontsize={fontsize}pt]{{fontsize}}
\usepackage{{libertine}} % also loads fontspec which is needed for ɔ and ɛ
%\usepackage{{minitoc}} % make mini table of content for each chapter
\usepackage{{graphicx}} % include graphics
\usepackage{{tcolorbox}} % https://en.wikipedia.org/wiki/Colophon_(publishing)
\usepackage{{placeins}} % https://tex.stackexchange.com/a/88659/264579
\usepackage{{csquotes}} % \enquote
\usepackage{{hyperref}} % https://tex.stackexchange.com/a/643590/264579
\usepackage{{reledmac}} % needed for repedpar
\usepackage{{reledpar}} % parallel text
\firstlinenum*{{1000}}
\linenumincrement*{{1000}}
\newcommand{{\pagesinclude}}[2]{{
	\begin{{pages}}
		\begin{{Leftside}}
			\beginnumbering
			\pstart\input{{#1}}\pend
			\endnumbering
		\end{{Leftside}}
		\begin{{Rightside}}
			\beginnumbering
			\pstart\input{{#2}}\pend
			\endnumbering
		\end{{Rightside}}
	\end{{pages}} 
	\Pages
}}
\title{{{title}}}
\author{{{author}}}
%\usepackage[showframe]{{geometry}}
\begin{{document}}
'''.format(pagesize=conf['document-options']['pagesize'],
           fontsize=conf['document-options']['fontsize'],
           title=conf['project-options']['title'],
           author=conf['project-options']['author'])
    mainfile_path=os.path.join(project_dir,proj+'.tex')
    with open(mainfile_path, 'w') as maintex: 
        maintex.write(mainfile_content)
        maintex.write('\n')
        # title page 
        titlepage=gettitlepage(conf)
        maintex.write(titlepage)
        # include chapters
        for infile in conf['project-options']['infiles']: 
#           maintex.write(infile)
           f=os.path.join("chapters", os.path.basename(infile).split('.')[0]+".tex")
           maintex.write(r'\input{{{f}}}'.format(f=f))
           maintex.write('\n')
        # end document
        maintex.write('\n')
        maintex.write(r'\end{document}')

def gettitlepage(conf):
    title_page=r'''
\begin{titlingpage} %This starts the title page
		% center textblock on page % https://tex.stackexchange.com/a/378157/264579
		\setlrmarginsandblock{2.5cm}{*}{1} % this is manual and only works for a5
		\setulmarginsandblock{2.5cm}{*}{1}
		\checkandfixthelayout 
		\begin{flushright}
		\hrule width \hsize height 2pt 
		\kern 1mm 
		\hrule width \hsize 
			\vspace{ 1.5em}
			\Huge
			title\par
%			\vspace{ 0.5em}
			\huge
			subtitlep osttitle\par
			\vspace{ 2em}
			\Large
			author
			\vspace{ 1.5em}
		\hrule width \hsize 
		\kern 1mm 
		\hrule width \hsize height 2pt 
			\vspace*{\fill}
			\LARGE
			SAKARA
%			\vspace{ 2em}
		\end{flushright}
\end{titlingpage}
'''
    return title_page

def make_pdf(conf):
    os.system("cd "+conf['project-options']['project']+" && make") # https://stackoverflow.com/a/92395
#    subprocess.call("make")

def convert_text_format(conf):
    proj=conf['project-options']['project']
    infiles=conf['project-options']['infiles']
    for infile in infiles:
        os.system("pandoc -f markdown -t latex -i {infile} -o {outfile}".format(
            infile=infile, 
            outfile=os.path.join(
                proj, 
                "chapters", 
                os.path.basename(infile).split('.')[0]+'.tex'
                ) 
            ) 
        )
        print(infile)
## MAIN 
conf=parse_options("anansesem.yaml")
project_dir=create_project_dir(conf)
create_skel(project_dir, conf)
infiles=conf['project-options']['infiles']
convert_text_format(conf)
make_pdf(conf)
exit(0)