#!/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"
_TOC = []
# CUR_PATH = os.path.dirname(os.path.abspath(__file__))

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 directory 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)

   #
   # create main html dom from template
   template_f = open("templates/main.tpl.html", "r")
   template_html = template_f.read()
   template_dom = BeautifulSoup(template_html, 'html.parser')
   # replace title
   template_dom.html.head.title.contents[0].replaceWith(book_name)
   # get story div
   story_dom = template_dom.find('div', {"id":"my-story"})

   #
   # loop through pages to convert them to html and add it to main html file
   book_build_d_pages = os.path.join(book_build_d,'pages')
   os.mkdir(book_build_d_pages)

   for p in toc:
      # print(toc[p]['file'])

      # files
      in_f = os.path.join(_BOOKS_SRC, book, toc[p]['file'])
      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)

      # out_f = os.path.join(book_build_d_pages, toc[p]['file'].replace('/', '-').replace('.md', '.html'))
      # print('out_f : '+out_f)

      pdoc_args = ['--mathjax',
                   '--smart']

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

      # append html story page to template_dom
      story_page = BeautifulSoup('<div class="story-page"></div>')
      story_page.div.append(BeautifulSoup(output))
      story_dom.append(story_page)

   # create main html file from filled template html dom
   book_html_f = os.path.join(book_build_d,book_name+'.html')
   with open(book_html_f, 'w') as fp:
      fp.write(template_dom.prettify())

   book_toc = {
      'label':book_name,
      'file':book_html_f
   }

   global _TOC
   _TOC.append(book_toc)


if __name__ == "__main__":
   main()