import os
import json
import shutil
import mysql.connector

# ------------------------------------------------------------------------------
# Global variables that is None by default and gets overwritten in other modules

app = None # main.py -> Flask App
sql_conn = None

# ------------------------------------------------------------------------------
# Global variables that initializes on first load of module

if not os.path.isfile("config.json"):
	print("`config.json` were not found! Copying default_config and continuing...")
	shutil.copy("default_config.json", "config.json")

with open("config.json", "r") as f:
	config = json.load(f)

def make_sql_connection():
	return mysql.connector.connect(**config["mysql"])

def get_sql_connection():
	global sql_conn
	if sql_conn is None or not sql_conn.is_connected():
		sql_conn = make_sql_connection()
	return sql_conn