#!/usr/bin/python
# -*- coding: utf-8 -*-


# @Author: Bachir Soussi Chiadmi <bach>
# @Date:   27-03-2017
# @Email:  bachir@figureslibres.io
# @Last modified by:   bach
# @Last modified time: 21-04-2017
# @License: GPL-V3


import sys, os
import shutil
import markdown
# import mistune
from bs4 import BeautifulSoup
import pypandoc
import json
import re

BOOKS_SRC = 'book-src'
BUILD_d = "build"
CUR_PATH = os.path.dirname(os.path.abspath(__file__))
_TOC = []

def main():
   print("Building books")
   if not os.path.isdir(BUILD_d):
      os.mkdir(BUILD_d)

   # loop through books sources
   for book in os.listdir(BOOKS_SRC):
      if os.path.isdir(os.path.join(BOOKS_SRC, book)):
         # print(book)
         parse_book(book)

   with open(BUILD_d+'/toc.json', 'w') as fp:
      json.dump(_TOC, fp, ensure_ascii=False, indent="\t")


def parse_book(book):
   book_name = book.replace('.git', '')
   print("- - -")
   print(book_name)
   print("- - -")

   # table of content (ordered list of markdown files)
   sum_p = os.path.join(BOOKS_SRC, book, "SUMMARY.md")
   if not os.path.isfile(sum_p):
      print("No summary file, can't generate html")
      return

   sum_f = open(sum_p)
   sum_str = sum_f.read()
   # print(sum_str)
   # convert md to html
   sum_html = markdown.markdown(sum_str)
   # print(sum_html)
   # create dom from html string (as it will be parsable)
   sum_dom = BeautifulSoup(sum_html, 'html.parser')
   # print(sum_dom)
   # parse html dom to get file list in the right order
   toc = parse_summary(sum_dom.ul, {})
   # print(toc)

   # generate final html build for html2print
   generate_html(book, toc, book_name)

def parse_summary(ul, toc):
   i=0
   for li in ul.find_all('li',recursive=False):
      # print('li')
      for a in li.find_all('a',recursive=False):
         # print(a.get_text(strip=True))
         # print(a['href'])
         href = a['href']
         href = re.sub(r'^/', '', href)
         toc[i] = {
            'label':a.get_text(strip=True),
            'file':href
         }
      i = i+1

   return toc

def generate_html(book, toc, book_name):


   # build destination
   book_build_d = os.path.join(BUILD_d,book_name)
   if os.path.isdir(book_build_d):
      shutil.rmtree(book_build_d, ignore_errors=True)
   os.mkdir(book_build_d)

   book_toc = {
      'label':book_name,
      'pages':[]
   }

   for p in toc:
      # print(toc[p]['file'])
      # generate html with pandoc

      # files
      md_f = toc[p]['file']
      in_f = os.path.join(BOOKS_SRC, book, md_f)
      if not os.path.isfile(in_f):
         print("Source path is not a file, can't generate html : "+in_f)
         continue
      # print('in_f : '+in_f)

      html_f = md_f.replace('.md', '.html')
      html_f = html_f.replace('README', 'index')
      html_f = html_f.replace('/', '-')
      out_f = os.path.join(book_build_d,html_f)
      # print('out_f : '+out_f)

      # pandoc options
      # filters = []

      pdoc_args = ['-s',
                   '--mathjax',
                   '--smart',
                   '--css=../../assets/fonts/amiri/amiri.css',
                   '--css=../../assets/css/dist/main.css',
                   '--include-before-body=templates/top.tpl.html',
                   '--include-after-body=templates/bot.tpl.html',
                   '--include-after-body=assets/lib/jquery.min.js',
                   '--include-after-body=assets/js/setup.js',
                   '--include-after-body=assets/js/html2print.js',
                   '--include-after-body=assets/js/script.js',
                   '--include-after-body=templates/end.tpl.html']

      # pandoc command line
      # print(pypandoc.get_pandoc_version())
      output = pypandoc.convert_file(in_f,
                               to='html5',
                               format='md',
                               extra_args=pdoc_args,
                              #  filters=filters,
                               outputfile=out_f)

      # save reference in railway
      book_toc['pages'].append({'label':toc[p]['label'], 'file':html_f})

   global _TOC
   _TOC.append(book_toc)
   # save railway as json file
   # with open(book_build_d+'/railway.json', 'w') as fp:
   #    json.dump(railway, fp, ensure_ascii=False, indent="\t")


if __name__ == "__main__":
   main()