import os
import sqlite3

from .settings import LNBITS_DATA_FOLDER


class Database:
    def __init__(self, db_path: str):
        self.path = db_path
        self.connection = sqlite3.connect(db_path)
        self.connection.row_factory = sqlite3.Row
        self.cursor = self.connection.cursor()
        self.closed = False

    def close(self):
        self.__exit__(None, None, None)

    def __enter__(self):
        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        if self.closed:
            return

        if exc_val:
            self.connection.rollback()
            self.cursor.close()
            self.connection.close()
        else:
            self.connection.commit()
            self.cursor.close()
            self.connection.close()

        self.closed = True

    def commit(self):
        self.connection.commit()

    def rollback(self):
        self.connection.rollback()

    def fetchall(self, query: str, values: tuple = ()) -> list:
        """Given a query, return cursor.fetchall() rows."""
        self.execute(query, values)
        return self.cursor.fetchall()

    def fetchone(self, query: str, values: tuple = ()):
        self.execute(query, values)
        return self.cursor.fetchone()

    def execute(self, query: str, values: tuple = ()) -> None:
        """Given a query, cursor.execute() it."""
        try:
            self.cursor.execute(query, values)
        except sqlite3.Error as exc:
            self.connection.rollback()
            raise exc


def open_db(db_name: str = "database") -> Database:
    db_path = os.path.join(LNBITS_DATA_FOLDER, f"{db_name}.sqlite3")
    return Database(db_path=db_path)


def open_ext_db(extension_name: str) -> Database:
    return open_db(f"ext_{extension_name}")
