"""

This module converts the canvas to lottie format

"""

import settings

from common.misc import calculate_pixels_per_unit

def calc_time(root, lottie, which):

    """

    Converts the starting time and ending time to lottie format

    Args:

        root   (lxml.etree._Element) : Synfig format animation file

        lottie (dict)                : Lottie format animation file

        which  (str)                 : Differentiates between in time and out time

    Returns:

        (None)

    """

    if which == "ip":

        phase = "begin-time"

    elif which == "op":

        phase = "end-time"

    time = root.attrib[phase].split(" ")

    lottie[which] = 0

    for frame in time:

        # Adding time in hours

        if frame[-1] == "h":

            lottie[which] += float(frame[:-1]) * 60 * 60 * lottie["fr"]

        # Adding time in minutes

        elif frame[-1] == "m":

            lottie[which] += float(frame[:-1]) * 60 * lottie["fr"]

        # Adding time in seconds

        elif frame[-1] == "s":

            lottie[which] += float(frame[:-1]) * lottie["fr"]

        # Adding time in frames

        elif frame[-1] == "f":

            lottie[which] += float(frame[:-1])

    # To support canvas with single frames

    if which == "op":

        lottie[which] += 1

def gen_canvas(lottie, root):

    """

    Generates the canvas for the lottie format

    It is the outer most dictionary in the lottie json format

    Args:

        lottie (dict)               : Lottie format animation file

        root   (lxml.etree._Element): Synfig format animation file

    Returns:

        (None)

    """

    settings.view_box_canvas["val"] = [float(itr) for itr in root.attrib["view-box"].split()]

    if "width" in root.attrib.keys():

        lottie["w"] = int(root.attrib["width"])

    else:

        lottie["w"] = settings.DEFAULT_WIDTH

    if "height" in root.attrib.keys():

        lottie["h"] = int(root.attrib["height"])

    else:

        lottie["h"] = settings.DEFAULT_HEIGHT

    settings.ADDITIONAL_PRECOMP_WIDTH = 4*lottie["w"]

    settings.ADDITIONAL_PRECOMP_HEIGHT = 4*lottie["h"]

    name = settings.DEFAULT_NAME

    for child in root:

        if child.tag == "name":

            name = child.text

            break

    lottie["nm"] = name

    lottie["ddd"] = settings.DEFAULT_3D

    lottie["v"] = settings.LOTTIE_VERSION

    lottie["fr"] = float(root.attrib["fps"])

    lottie["assets"] = []       # Creating array for storing assets

    lottie["markers"] = []      # Creating array for storing markers

    calc_time(root, lottie, "ip")

    calc_time(root, lottie, "op")

    calculate_pixels_per_unit()