from subprocess import run
from sys import argv
from flask_sqlalchemy import SQLAlchemy
from flask import Flask
from fields import Glacier, Annual_Data, Annual_Change, User

global db


def create_database(db_name, db_user, db_pw):
    script = "mariadb_setup.sh"
    output = run([script + db_name + db_user + db_pw])
    if output.returncode != 0:
        print("Error: couldn't create database")
        exit()


def create_connection(db_name, db_user, db_pw):
    host = "localhost:3306"
    connection_uri = "mysql+pymysql://{user}:{pw}@{url}/{db}".format(
        user=db_user, pw=db_pw, url=host, db=db_name
    )
    app = Flask(__name__)
    app.config["SQLALCHEMY_DATABASE_URI"] = connection_uri
    app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
    global db
    db = SQLAlchemy(app)


def create_tables(db):
    db.create_all()


def main():
    if len(argv) != 3:
        print("Usage: " + argv[0] + " <db name> <db user> <db password>")
        exit()

    db_name = str(argv[1])
    db_user = str(argv[2])
    db_password = str(argv[3])

    create_database(db_name, db_user, db_password)
    create_connection(db_name, db_user, db_password)
    create_tables(db)


if __name__ == "__main__":
    main()