import logging
import os.path
import sqlite3
from pathlib import Path


def create_database():
    """Creates the database."""

    # Check if the database already exists
    if os.path.exists(Path(__file__).parent / "jarvis-commands-memory.sqlite"):
        logging.debug("Database already exists, skipping creation")
        return

    with open(Path(__file__).parent / "create_empty_database.sql", "r") as create_database_script:
        create_database_script = create_database_script.read()

    db = sqlite3.connect(Path(__file__).parent / "jarvis-commands-memory.sqlite")
    cursor = db.cursor()
    cursor.executescript(create_database_script)
    db.commit()
    db.close()

    logging.info("Database created")


def do_request(request, args=None):
    """Execute SQL request and return result"""

    conn = sqlite3.connect(Path(__file__).parent / "jarvis-commands-memory.sqlite")
    cursor = conn.cursor()

    if not args:
        cursor.execute(request)
    else:
        cursor.execute(request, args)

    conn.commit()
    result = cursor.fetchall()
    conn.close()
    return result


def add_response(response):
    """Add a response to the database"""

    # Check if the response is already in the database
    request = do_request("SELECT * FROM responses WHERE response=?", (response,))
    if request:
        response_id = request[0][0]
        logging.debug("Response already in database (id: " + str(response_id) + ")")

    # If not, add it
    else:
        do_request("INSERT INTO responses (response) VALUES (?)", (response,))
        response_id = do_request("SELECT * FROM responses WHERE response=?", (response,))[0][0]
        logging.debug("Response added to database with id " + str(response_id) + ": " + str(response))

    return response_id


def add_command(original_command, simplified_command, response):
    """Add a command to the database"""

    do_request("INSERT INTO commands (original_command, simplified_command, response) VALUES (?, ?, ?)",
               (original_command, simplified_command, add_response(response)))
    logging.debug("Query added to database: " + original_command + " -> " + response)