from serial import Serial
from typing import Optional

from . import Logger


class EepromProgrammer:
    # Dependencies
    logger: Logger
    serial: Optional[Serial]

    # Settings
    _device_file: str
    _baudrate: int

    def __init__(self, logger: Logger, device: str, baudrate):
        self.logger = logger
        self.serial = None

        self._device_file = device
        self._baudrate = baudrate

    # TODO
    def open(self):
        """
        Open and setup serial port.
        """
        assert self.serial is None, 'Serial port is already opened!'

        self.logger.debug("Setting up serial device '{}' with baudrate {}".format(self._device_file, self._baudrate))
        self.serial = Serial(self._device_file, self._baudrate)

    def close(self):
        if self.serial is None:
            self.logger.debug("Serial port is already closed")
            return

        self.logger.debug("Closing serial port")
        self.serial.close()

    # TODO
    def test(self):
        # Open serial port
        if self.serial is None:
            self.open()

        # Write a test command
        self.logger.info("Sending 'INIT' ...")
        self.serial.write(b"INIT\n")

        # Just read some stuff
        self.logger.info("Read line: ", self.serial.readline(80))