import os
from os import walk
import general_function
import exchange.extract.exchange_extract_function as ex_extract_func
import exchange.load.exchange_load_function as ex_load_func

def exchange_extract(EXCHANGE_CSV_TEMP_STORAGE_PATH):
    #Config file name
    EX_MYSQL_CONFIG_FILE = "EXCHANGE_CONFIG.json"
    EX_SQL_FILE = "EXCHANGE_EXTRACT_SQL.json"
    EXCHANGE_CSV_TEMP_STORAGE_PATH = EXCHANGE_CSV_TEMP_STORAGE_PATH
    
    print("/config/",EX_MYSQL_CONFIG_FILE)
    #Read config file
    EX_MYSQL_CONFIG = general_function.read_json_file("./config/",EX_MYSQL_CONFIG_FILE)
    EX_SQL_DICT = general_function.read_json_file("./config/",EX_SQL_FILE)

    #Connect to mysql
    EX_MYSQLDB = ex_extract_func.connect_mysql(EX_MYSQL_CONFIG)
    EX_MYSQLCURSOR = EX_MYSQLDB.cursor()

    #Run EX_SQL_DICT to get all data from mysql in csv format
    ex_extract_func.mysql_dict_sql_to_csv(EX_SQL_DICT, EXCHANGE_CSV_TEMP_STORAGE_PATH, EX_MYSQLDB, EX_MYSQLCURSOR)

def exchange_load_to_cloudstorage(EXCHANGE_CSV_TEMP_STORAGE_PATH):
    #Config file name
    CLOUDSTORAGE_CREDENTIAL_FILE = "./config/CLOUD_STORAGE_ADMIN_CREDENTIAL.json"

    #Connect to cloudstorage
    ex_storage_client = ex_load_func.login_cloudstorage_credential(CLOUDSTORAGE_CREDENTIAL_FILE)

    #Get the filename and path in temp csv storage
    temp_file_list = []
    for (dirpath, dirnames, filenames) in walk(EXCHANGE_CSV_TEMP_STORAGE_PATH):
        temp_file_list.extend(filenames)
    
    #Loop all the file and upload to cloudstorage
    for file_name in temp_file_list:
        file_path = os.path.join(dirpath,file_name)
        ex_load_func.upload_to_bucket(ex_storage_client, file_name, file_path)


def main():
    #Extract Load Exchange Data, and delete the temp csv
    EXCHANGE_CSV_TEMP_STORAGE_PATH = "./exchange/extract/exchange_temp_extract_csv/"
    exchange_extract(EXCHANGE_CSV_TEMP_STORAGE_PATH)
    exchange_load_to_cloudstorage(EXCHANGE_CSV_TEMP_STORAGE_PATH)
    general_function.delete_csv_in_path(EXCHANGE_CSV_TEMP_STORAGE_PATH)


if __name__ == "__main__":
    main()