extends Node

func _ready():
    var p = funcref(self, "print_line")

    # We'll start by getting the current time.
    var now = OS.get_datetime()
    p.call_func(now)

    # You can build a time dictionary by providing the
    # year, month, day, etc. GDScript doesn't have a built-in
    # time zone concept, so we'll use UTC.
    var then = {
        "year": 2009,
        "month": 11,
        "day": 17,
        "hour": 20,
        "minute": 34,
        "second": 58
    }
    p.call_func(then)

    # You can extract the various components of the time
    # value as expected.
    p.call_func(then["year"])
    p.call_func(then["month"])
    p.call_func(then["day"])
    p.call_func(then["hour"])
    p.call_func(then["minute"])
    p.call_func(then["second"])

    # GDScript doesn't have built-in weekday calculation,
    # so we'll skip that part.

    # These methods compare two times, testing if the
    # first occurs before, after, or at the same time
    # as the second, respectively.
    p.call_func(is_date_before(then, now))
    p.call_func(is_date_after(then, now))
    p.call_func(is_date_equal(then, now))

    # GDScript doesn't have a built-in duration concept,
    # so we'll calculate the difference in seconds.
    var diff = time_difference(then, now)
    p.call_func(diff)

    # We can compute the length of the duration in
    # various units.
    p.call_func(diff / 3600.0)  # Hours
    p.call_func(diff / 60.0)    # Minutes
    p.call_func(diff)           # Seconds

    # You can use add_to_time to advance a time by a given
    # duration, or subtract to move backwards.
    p.call_func(add_to_time(then, diff))
    p.call_func(add_to_time(then, -diff))

func is_date_before(date1, date2):
    return OS.get_unix_time_from_datetime(date1) < OS.get_unix_time_from_datetime(date2)

func is_date_after(date1, date2):
    return OS.get_unix_time_from_datetime(date1) > OS.get_unix_time_from_datetime(date2)

func is_date_equal(date1, date2):
    return OS.get_unix_time_from_datetime(date1) == OS.get_unix_time_from_datetime(date2)

func time_difference(date1, date2):
    return OS.get_unix_time_from_datetime(date2) - OS.get_unix_time_from_datetime(date1)

func add_to_time(date, seconds):
    var unix_time = OS.get_unix_time_from_datetime(date) + seconds
    return OS.get_datetime_from_unix_time(unix_time)