import argparse, os, sys, glob, re, json, hashlib, logging
from datetime import datetime
import config
import collections


ARCH = "archives/"

hashes = []

def hash(m):
	return hashlib.sha256((m['from'] + m['subject'] + m['date']).encode("utf-8")).hexdigest()

def report_msg(msg):
	global hashes

	h = hash(msg)																			
	if h in hashes:
		# logging.warning("Duplicate: " + msg['from'] + " - " + msg['subject'] + " - " + msg['date'] + ". Skipping...")
		return None
	else:
		hashes.append(h)

		chars = 0
		words = 0
		lines = 0

		chars += len(msg["content"])
		words += len(re.findall(r'\w+', msg["content"]))
		lines += len(msg["content"].split('\n'))

		if 'follow-up' in msg:
			for f in msg['follow-up']:
				x = report_msg(f)
				if x is not None:
					chars += x[0]
					words += x[1]
					lines += x[2]

		return (chars, words, lines)

def year_filename(fn):
	return datetime.strptime(fn, "%B_%Y.json").year


def run(l):

	global hashes

	if not l.startswith(config.archives):
		l = os.path.join(config.archives, l)

	if not os.path.isdir(l):
		sys.exit(l + ' is not a valid archive. Aborting.')

	files = [f for f in glob.glob(os.path.join(l, "*.json"))]

	report = {}

	for f in files:		
		# print(os.path.basename(f))

		with open(f) as fp:
			d = json.load(fp)

		for t in d['threads']:
			x = report_msg(t)

		year = year_filename(os.path.basename(f))
		# print(year)
		if year not in list(report.keys()):
			report[year] = {'chars': 0, 'words': 0, 'lines': 0}

		if x is not None:
			report[year]['chars'] += x[0]
			report[year]['words'] += x[1]
			report[year]['lines'] += x[2]

	total_chars = 0
	total_words = 0
	total_lines = 0
	print("\n\n" + l)
	print("Number of written characters per year:")
	sorted_report = collections.OrderedDict(sorted(report.items()))
	for k, v in sorted_report.items():
		print("	" + str(k) + ": " + str(v['chars']))
		total_chars += v['chars']
	print("Number of written words per year:")
	for k, v in sorted_report.items():
		print("	" + str(k) + ": " + str(v['words']))
		total_words += v['words']
	print("Number of written lines per year:")
	for k, v in sorted_report.items():
		print("	" + str(k) + ": " + str(v['lines']))
		total_lines += v['lines']

	
	print("Total chars: " + str(total_chars))
	print("Total words: " + str(total_words))
	print("Total lines: " + str(total_lines))


if __name__ == "__main__":

	p = argparse.ArgumentParser(description='Mailinglists are dead. Long live mailinglists!')
	p.add_argument('list', metavar="list", help="mailinglist to ana", nargs="+")

	args = p.parse_args()

	if not args.list:
		sys.exit('No list(s). Aborting.')

	for l in args.list:
		run(l)

	print("\n\n . . . . ")