parse-date-time

#!/usr/bin/env -S uv --quiet run --no-project --script --
# https://peps.python.org/pep-0723/
# https://github.com/astral-sh/uv
# /// script
# requires-python = ">=3.14,<4"
# dependencies = [
#   "parsedatetime >=2.6",
#   "tzlocal >=5.2",
# ]
# ///

import sys, datetime
import parsedatetime
import tzlocal

def main():
	input_str = sys.argv[1]

	local_timezone = tzlocal.get_localzone()

	# Setting the reference time to last year this date and time.
	# If the year is not specified, the resulting date will be in the past.
	#TODO This breaks day of week based parsing.
	reference_time = datetime.datetime.now().replace(tzinfo=local_timezone)
	reference_time = reference_time.replace(year=(reference_time.year - 1))

	calendar = parsedatetime.Calendar()

	result, retcode = calendar.parseDT(input_str, sourceTime=reference_time)

	if retcode == 0 or not result:
		print(input_str)
		return

	if result.tzinfo is None:
		result = result.replace(tzinfo=local_timezone)

	if retcode == 1: # parsed as C{date}
		print(f"{result:%F}")
	elif retcode == 2: # parsed as C{time}
		print(f"{result:%T}")
	elif retcode == 3: # parsed as C{datetime}
		print(f"{result:%FT%T%:z}")
	else:
		print("(unexpected result from parsedatetime)")


	#TODO Implement "? week(s) from ???"


if __name__ == '__main__':
	sys.exit(main())