import argparse, os, glob, sys, json, re, logging, hashlib
import mysql.connector as mariadb
from report import listsreport
from archive import archive
import config
from datetime import datetime
import collections


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 report_all(l):

	global hashes

	ll = l

	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("[" + ll + "] 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("[" + ll + "] Number of written words per year:")
	for k, v in sorted_report.items():
		print("	" + str(k) + ": " + str(v['words']))
		total_words += v['words']
	print("[" + ll + "] Number of written lines per year:")
	for k, v in sorted_report.items():
		print("	" + str(k) + ": " + str(v['lines']))
		total_lines += v['lines']

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


def format_from(f):	
	i = f.lower().find("{at}")	
	if i > 0:
		return re.sub('[0-9a-zA-Z]', '*', f[:i]) + f[i:] + "; "
	else:
		return ""


if __name__ == "__main__":

	p = argparse.ArgumentParser(description='Mailinglists report')
	p.add_argument('lists', metavar="lists", help="lists to report", nargs="+")
	p.add_argument('--txt', '-t', default=False, help="output as text", action="store_true")

	args = p.parse_args()

	db_con = archive.connect_db(config.db['database'], config.db['host'], config.db['user'], config.db['password'])

	if db_con is None:
		logging.warning("Not connection to database...")
		sys.exit()

	try:
		cursor = db_con.cursor(buffered=True)

		report = {}
		for li in args.lists:
			report[li] = {}
			# contributors
			contribs = listsreport.contributors(li, cursor)
			contribs_year = listsreport.contributors(li, cursor, per_year=True)
			report[li]['contributors'] = contribs
			report[li]['contributors_year'] = contribs_year

			# size text
			text_size = listsreport.text_size(li, cursor)
			text_size_year = listsreport.text_size(li, cursor, per_year=True)
			report[li]['text_size'] = text_size
			report[li]['text_size_year'] = text_size_year

			# contributions
			contribs = listsreport.contributions(li, cursor)
			contribs_year = listsreport.contributions(li, cursor, per_year=True)
			report[li]['contributions'] = contribs
			report[li]['contributions_year'] = contribs_year

	except mariadb.Error as error:
		logging.error("Error: {}".format(error))
	finally:
		cursor.close()

	if args.txt:

		for k, v in report.items():
			# print("Report: " + k)

			# contributions
			print("[" + k + "] Total contributions: " + v['contributions'])
			print("[" + k + "] Contributions per year:")
			for c in v['contributions_year']:
				print("	" + c['year'] + ": " + c['val'])

			report_all(k)

			# print("[" + k + "] Total number of written characters: " + v['text_size'])
			# print("[" + k + "] Number of written characters per year:")
			# for c in v['text_size_year']:
			# 	print("	" + c['year'] + ": " + c['val'])

			print("[" + k + "] Total number of disctinct contributors' email address: " + str(len(v['contributors'])))
			print("[" + k + "] Cohort of contributors per year:")
			for c in v['contributions_year']:
				print("	" + c['year'] + ": " + c['val'])

			print("[" + k + "] List of contributors obfuscated addresses:")
			list_contibutors = ""
			for c in v['contributors']:
				list_contibutors += format_from(c)
			print(list_contibutors)
				

	else:
		print(json.dumps(report))