import mysql.connector as mariadb
import os, json, glob, logging
from lxml import etree as et
import db.sql, db.utils

class DB:

	db_con = None

	def __init__(self, config):
		self.db_con = db.utils.connect_db(config['database'], config['host'], config['user'], config['password'])

	def __enter__(self):
		return self

	def __exit__(self, exc_type, exc_value, traceback):
		if self.db_con is not None:
			self.db_con.close()

	def create_db(self, config=None):

		logging.info("creating table 'full_digest_rescheduled'")
		if self.db_con is None:
			if config is not None:
				self.db_con = db.utils.connect_db(config['database'], config['host'], config['user'], config['password'])
		
		if self.db_con is None:
			logging.warning(" - no connection... Aborting.")
			return

		try:			
			cursor = self.db_con.cursor()
			cursor.execute(db.sql.CREATE)
		except mariadb.Error as error:
			logging.error("Error: {}".format(error))
		finally:
			cursor.close()

		logging.info(" - done.")

	def insert_db(self, xml_file, urls_index_file, config=None):

		if self.db_con is None:
			if config is not None:
				self.db_con = db.utils.connect_db(config['database'], config['host'], config['user'], config['password'])
		
		if self.db_con is None:
			logging.warning(" - no connection... Aborting.")
			return

		if not os.path.isfile(xml_file):
			logging.error(f + " is not a valid file.")
			return None

		# urls_index_file = os.path.join(config.index['path'], config.index['urls'])
		if not os.path.isfile(urls_index_file):
			logging.error(urls_index_file + " is not a valid file.")
			return None
		
		with open(urls_index_file) as fp:
			urls = json.load(fp)

		ch = os.path.basename(xml_file).split('.')[0]

		root = et.parse(xml_file).getroot()

		try:
			logging.info("-----------------")
			logging.info(os.path.basename(xml_file))
			logging.info("-----------------")

			cursor = self.db_con.cursor()

			for m in root.findall('mails/mail'):

				nbr_str = m.find('nbr').text
				to_str = m.find('to').text
				date_str = m.find('date').text
				from_str = m.find('from').text
				subject_str = m.find('subject').text
				content_str = m.find('content').text

				# format nbr
				nbr_str = ch + '.' + nbr_str

				if nbr_str not in urls:
					logging.warning(nbr_str + " is not in urls... skipping.")
					continue

				url = urls[nbr_str]

				date = db.utils.format_date(date_str)
				if date is None:
					logging.warning("null date: " + nbr_str + " - " + date_str + " - " + from_str)
					logging.warning("continuing...")
					continue

				# aaarrrgghhh
				if to_str == "n/a":
					to_str = "syndicate@aec.at"

				try:
					# (nbr_, author_name_, to_, subject_, date_, content_, url_)
					logging.info("inserting " + nbr_str)
					r = cursor.execute(db.sql.INSERT, (nbr_str, from_str, to_str, subject_str, date, content_str, url))
					if r == 0:
						logging.warning("error no insert...")
						logging.warning(nbr_str + " - " + from_str + " - " + to_str + " - " + subject_str + " - " + date + " - " + content_str + " - " + url)
				except mariadb.Error as error:
					if error.errno == 1062:
						logging.info("+++db+++ duplicate")
						continue
					else:
						logging.warning("Error...")
						logging.warning(nbr_str + " - " + from_str + " - " + to_str + " - " + subject_str + " - " + date + " - " + content_str + " - " + url)
						continue

			self.db_con.commit()

		except Exception as e:
			raise e
		finally:
			cursor.close()


	def content_search(self, term, bool=True):

		if self.db_con is None:
			logging.warning("Not connection to database...")
			return

		try:
			cursor = self.db_con.cursor(buffered=True)
			if bool:
				cursor.execute(db.sql.CONTENT_QUERY_BOOLEAN.format(self.archive_name, term))
			else:
				cursor.execute(db.sql.CONTENT_QUERY.format(self.archive_name, term))

			# nbr_, author_name_, to_, subject_, date_, url_
			results = []
			for (nbr_, author_name_, to_, subject_, date_, url_) in cursor:
				results.append({'nbr': nbr_, 'from': author_name_, 'to': to_, 'subject': subject_, 'date': date_, 'url': url_})
				# print("{} {} {}".format(from_, str(date_), url_))
			return results

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

	def from_search(self, term, bool=True):

		if self.db_con is None:
			logging.warning("Not connection to database...")
			return

		try:
			cursor = self.db_con.cursor(buffered=True)
			if bool:
				cursor.execute(archive.sql.FROM_QUERY_BOOLEAN.format(self.archive_name, term))
			else:
				cursor.execute(archive.sql.FROM_QUERY.format(self.archive_name, term))

			# print(cursor.rowcount)
			results = []
			for (from_, author_name_, subject_, date_, url_) in cursor:
				results.append((from_, author_name_, subject_, date_, url_))
				# print("{} {} {}".format(from_, str(date_), url_))
			return results

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