from datetime import datetime
from typing import NamedTuple, Iterator

from ..common import LazyLogger
from ..error import Res
from ..notes import orgmode

from mycfg import weight as config


log = LazyLogger('my.body.weight')


class Entry(NamedTuple):
    dt: datetime
    value: float
    # TODO comment??


Result = Res[Entry]


def from_orgmode() -> Iterator[Result]:
    orgs = orgmode.query()
    for o in orgs.query_all(lambda o: o.with_tag('weight')):
        try:
            # TODO ?? Result type?
            created = o.created
            heading = o.heading
        except Exception as e:
            log.exception(e)
            yield e
            continue
        try:
            w = float(heading)
        except ValueError as e:
            log.exception(e)
            yield e
            continue
        # TODO not sure if it's really necessary..
        created = config.default_timezone.localize(created)
        yield Entry(
            dt=created,
            value=w,
            # TODO add org note content as comment?
        )