#====================== BEGIN GPL LICENSE BLOCK ======================
#
#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU General Public License
#  as published by the Free Software Foundation; either version 2
#  of the License, or (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software Foundation,
#  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
#======================= END GPL LICENSE BLOCK ========================

# <pep8 compliant>


#=============================================
# Keyframing functions
#=============================================


def get_keyed_frames(rig):
    frames = []
    if rig.animation_data:
        if rig.animation_data.action:
            fcus = rig.animation_data.action.fcurves
            for fc in fcus:
                for kp in fc.keyframe_points:
                    if kp.co[0] not in frames:
                        frames.append(kp.co[0])

    frames.sort()

    return frames


def bones_in_frame(f, rig, *args):
    """
    True if one of the bones listed in args is animated at frame f
    :param f: the frame
    :param rig: the rig
    :param args: bone names
    :return:
    """

    if rig.animation_data and rig.animation_data.action:
        fcus = rig.animation_data.action.fcurves
    else:
        return False

    for fc in fcus:
        animated_frames = [kp.co[0] for kp in fc.keyframe_points]
        for bone in args:
            if bone in fc.data_path.split('"') and f in animated_frames:
                return True

    return False


def overwrite_prop_animation(rig, bone, prop_name, value, frames):
    act = rig.animation_data.action
    if not act:
        return

    bone_name = bone.name
    curve = None

    for fcu in act.fcurves:
        words = fcu.data_path.split('"')
        if words[0] == "pose.bones[" and words[1] == bone_name and words[-2] == prop_name:
            curve = fcu
            break

    if not curve:
        return

    for kp in curve.keyframe_points:
        if kp.co[0] in frames:
            kp.co[1] = value