import re
import os
import gzip
import glob
import json
import click
import math
import string
from util import *

PDF_DIR = 'datasets/s2/pdf'

@click.command()
def s2_pdf_report():
  rows = []
  empty_papers = []
  no_separator_papers = []
  geocoded_papers = [] 
  unknown_papers = []
  found_count = 0
  total_count = 0
  addresses = AddressBook()
  for fn in glob.iglob('{}/**/*.txt'.format(PDF_DIR), recursive=True):
    paper_id = fn.replace(PDF_DIR, '').split('/')[2]
    paper = load_paper(paper_id)
    total_count += 1
    # print(paper_id)
    headings, found_abstract = read_headings(fn, paper)
    heading_string = '\n'.join(headings[0:20])
    found_addresses = []
    if not found_abstract:
      if len(headings) == 0:
        empty_papers.append(paper.record())
        continue
      if len(headings) > 20:
        no_separator_papers.append(paper.record())
        # continue
    for heading in headings:
      l = heading.lower().strip()
      address = addresses.find(l)
      if address:
        found_addresses.append(address)

    # MAYBE try checking the entire string against everything?
    # if not len(found_addresses):
    #   l = heading_string.lower().strip()
    #   address = addresses.find(l)
    #   if address:
    #     found_addresses.append(address)

    if len(found_addresses):
      found_count += 1
      for address in found_addresses:
        geocoded_papers.append([paper.paper_id, paper.title] + address)
    else:
      unknown_papers.append([paper.paper_id, paper.title, heading_string])
  write_csv('reports/stats/empty_papers.csv', keys=None, rows=empty_papers)
  write_csv('reports/stats/no_separator_papers.csv', keys=None, rows=no_separator_papers)
  write_csv('reports/stats/geocoded_papers.csv', keys=None, rows=geocoded_papers)
  write_csv('reports/stats/unknown_papers.csv', keys=None, rows=unknown_papers)
  print("{} {} ({}%)".format('empty', len(empty_papers), percent(len(empty_papers), total_count)))
  print("{} {} ({}%)".format('no separator', len(no_separator_papers), percent(len(no_separator_papers), total_count)))
  print("{} {} ({}%)".format('found', found_count, percent(found_count, total_count)))
  print("{} {} ({}%)".format('unknown', len(unknown_papers), percent(len(unknown_papers), total_count)))
  print("{} {} entities".format('geocoded', len(geocoded_papers)))

def percent(a,b):
  return round(100 * a / b)

def read_headings(fn, paper):
  headings = []
  found_abstract = False
  found_authors = []
  journal = paper.journal.lower()
  authors = [ (a[0], a[1], a[1].lower(),) for a in paper.authors ]
  with open(fn, 'r') as f:
    for line in f.readlines():
      line = re.sub(r"\S*@\S*\s?", '', line)
      l = line.lower().strip()
      if len(l) < 5:
        continue
      if line[0] == 'a' or line[0] == 'b' or line[0] == 'c' or line[0] == '1' or line[0] == '2' or line[0] == '3' or line[0] == '4':
        line = line[1:]
      line = line.strip("∗†‡")
      line = line.replace("fl", "fl").replace('ff', 'ff').replace('ffi', 'f‌f‌i').replace('ffl', 'f‌f‌l')
      line = line.strip()
      if 'abstract' in l:
        found_abstract = True
        break
      if journal and journal in l:
        continue
      names = [s.strip() for s in re.split(',| and ', l)]
      was_found = False
      for name in names:
        found = find_authors(authors, name)
        if found:
          was_found = True
          # print("found {}".format(found[1]))
          if found[0]:
            found_authors.append(found)
            continue
      headings.append(line.strip())
  return headings, found_abstract

def find_authors(authors, line):
  for a in authors:
    if a[2] in line:
      return a
  return None

def paper_path(paper_id):
  return '{}/{}/{}'.format(PDF_DIR, paper_id[0:2], paper_id)
  
if __name__ == '__main__':
  s2_pdf_report()