#!/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, shutil
import markdown
# import mistune
from bs4 import BeautifulSoup
import pypandoc
import json
import re

_BOOK_SRC = 'book-src'
_BUILD_d = "build"
# CUR_PATH = os.path.dirname(os.path.abspath(__file__))

print("Building book")
def main():
   # clean build directory
   if os.path.isdir(_BUILD_d):
      shutil.rmtree(_BUILD_d, ignore_errors=True)
   os.mkdir(_BUILD_d)

   parse_book(_BOOK_SRC)


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

   # table of content (ordered list of markdown files)
   sum_p = os.path.join(_BOOK_SRC, "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)

def parse_summary(ul, toc):
   print("Parse summary")
   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):
   print("Generate html")
   #
   # 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":"flow-main"})

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

   pi = 0
   for p in toc:
      print(toc[p]['file'])
      pagename = toc[p]['file'].replace('.md', '')

      # files
      in_f = os.path.join(_BOOK_SRC, 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']

      pdoc_filters = []

      output = pypandoc.convert_file(in_f,
                               to='html5',
                               format='markdown+header_attributes+link_attributes+bracketed_spans',
                               extra_args=pdoc_args,
                               filters=pdoc_filters)
                              #  outputfile=out_f)
      output_dom = BeautifulSoup(output, 'html.parser')


      # append html story page to template_dom
      story_page = BeautifulSoup('<div class="story-page" id="story-page-'+str(pi)+'"></div>', 'html.parser')
      story_page.div.append(output_dom)
      story_dom.append(story_page)

      # copy images
      for img in output_dom.find_all('img'):
         att_src = re.sub(r"^\/", "", img['src'])
         src_img = os.path.join(_BOOK_SRC, att_src)
         # print('- -  '+src_img)

         if not os.path.isfile(src_img):
            print("Source path is not a file, can't copy img : "+src_img)
            continue

         dest_img = os.path.join(_BUILD_d, att_src)
         # print('- -  '+dest_img)

         dest_path, dest_file = os.path.split(dest_img)
         if not os.path.isdir(dest_path):
            os.makedirs(dest_path)

         shutil.copyfile(src_img, dest_img)

      pi = pi+1

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



if __name__ == "__main__":
   main()