import re

def mysql_to_sqlite( mysql_sql_code ):
	"""
	converts a mysql-compatible sql code into a sqlite-ompatible sql code
	
	note: the original code was found on internet, then tweaked
	"""
	content = mysql_sql_code

	# unused commands
	COMMAND_RE = re.compile(r'^(SET).*?;\n$', re.I | re.M | re.S)
	content = COMMAND_RE.sub('', content)

	# table constraints
	TCONS_RE = re.compile(r'\)(\s*(CHARSET|DEFAULT|ENGINE)(=.*?)?\s*)+;', re.I | re.M | re.S)
	content = TCONS_RE.sub(');', content)

	# remove comments
	# content = re.sub(r'^-- Tab[.]', 'toto', content, flags=re.I | re.M | re.S)

	# sqlite doesn't like 'unsigned' as in `ip_address_3` tinyint(3) unsigned NOT NULL default '27',
	content = re.sub(r' unsigned ', ' ', content)

	# sqlite doesn't like 'enum' as in `type` enum('normal','light_out_management') NOT NULL default 'normal',,
	content = re.sub(r' enum\([^\)]*\) ', ' varchar(255) ', content)

	# insert multiple values
	# INSERTVALS_RE = re.compile(r'^(INSERT INTO.*?VALUES)\s*\((.*)\*;', re.I | re.M | re.S)
	INSERTVALS_RE = re.compile(r'^(INSERT INTO.*?VALUES)\s*([^;]*);', re.I | re.M | re.S)
	#INSERTVALS_RE = re.compile(r'^(INSERT INTO.*?VALUES)\s*((\[^\)](\)));$', re.I | re.M | re.S)
	INSERTVALS_SPLIT_RE = re.compile(r'\)\s*,\s*\(', re.I | re.M | re.S)

	def insertvals_replacer(match):
		insert, values = match.groups()
		# print("insert=%s"%insert)
		# print("values=%s"%values)
		values = re.sub('^\s*\(' ,'', values)
		values = re.sub('\)\s*$' ,'', values)
		replacement = ''
		for vals in INSERTVALS_SPLIT_RE.split(values):
			#print("vals=%s"%vals)
			replacement = '%s\n%s (%s);' % (replacement, insert, vals)
		return replacement

	content = INSERTVALS_RE.sub(insertvals_replacer, content)
	return content