# TODO Logging is interesting for debugging purposes, decide what to do with it
from logger import newlogger
logger = newlogger(__name__)
#import logging
#logger.setLevel(logging.WARN)

class Reader:
    def __init__(self, filename):
        self.filename = filename
        self._file    = None
        self.lineno   = 0
        self.charno   = 0
        self.char     = None

    def open(self):
        self._file = open(self.filename, "r")
        return
    def close(self):
        self._file.close()
        return

    def __enter__(self):
        self.open()
        return self

    def __exit__(self, type, value, tb):
        self.close()

    def advance(self):
        self.charno += 1
        if self.char == "\n":
            self.lineno += 1
            self.charno = 0
        self.char = self._file.read(1)

        logger.debug("Read: %s" % self.char.__repr__())
        return

    def peek(self):
        pos = self._file.tell()
        ch = self._file.read(1)
        self._file.seek(pos)
        return ch


if __name__ == "__main__":
    with Reader(__file__ ) as src:
        print(src.peek())
        while src.peek() != "":
            src.advance()
            print(src.char)