# ##### 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 #####

# <pep8-80 compliant>

import bpy
from bpy.types import Operator
from bpy.props import (
    IntProperty,
    FloatProperty,
    BoolProperty,
    EnumProperty,
)

gp_object_items = []


def my_objlist_callback(scene, context):
    gp_object_items.clear()
    gp_object_items.append(('*NEW', "New Object", ""))
    for o in context.scene.objects:
        if o.type == 'GPENCIL':
            gp_object_items.append((o.name, o.name, ""))

    return gp_object_items


class GPENCIL_OT_mesh_bake(Operator):
    """Bake all mesh animation into grease pencil strokes"""
    bl_idname = "gpencil.mesh_bake"
    bl_label = "Bake Mesh to Grease Pencil"
    bl_options = {'REGISTER', 'UNDO'}

    frame_start: IntProperty(
        name="Start Frame",
        description="Start frame for baking",
        min=0, max=300000,
        default=1,
    )
    frame_end: IntProperty(
        name="End Frame",
        description="End frame for baking",
        min=1, max=300000,
        default=250,
    )
    step: IntProperty(
        name="Frame Step",
        description="Frame Step",
        min=1, max=120,
        default=1,
    )
    thickness: IntProperty(
        name="Thickness",
        description="Thickness of the stroke lines",
        min=1, max=100,
        default=1,
    )
    angle: FloatProperty(
        name="Threshold Angle",
        description="Threshold to determine ends of the strokes",
        min=0,
        max=+3.141592,
        default=+1.22173,  # 70 Degress
        subtype='ANGLE',
    )
    offset: FloatProperty(
        name="Stroke Offset",
        description="Offset strokes from fill",
        soft_min=0.0, soft_max=100.0,
        min=0.0, max=100.0,
        default=0.001,
        precision=3,
        step=1,
        subtype='DISTANCE',
        unit='LENGTH',
    )
    seams: BoolProperty(
        name="Only Seam Edges",
        description="Convert only seam edges",
        default=False,
    )
    faces: BoolProperty(
        name="Export Faces",
        description="Export faces as filled strokes",
        default=True,
    )
    target: EnumProperty(
        name="Target Object",
        description="Grease Pencil Object",
        items=my_objlist_callback
        )
    frame_target: IntProperty(
        name="Target Frame",
        description="Destination frame for the baked animation",
        min=1, max=300000,
        default=1,
    )
    project_type: EnumProperty(
        name="Reproject Type",
        description="Type of projection",
        items=(
            ("KEEP", "No Reproject", ""),
            ("FRONT", "Front", "Reproject the strokes using the X-Z plane"),
            ("SIDE", "Side", "Reproject the strokes using the Y-Z plane"),
            ("TOP", "Top", "Reproject the strokes using the X-Y plane"),
            ("VIEW", "View", "Reproject the strokes to current viewpoint"),
            ("CURSOR", "Cursor", "Reproject the strokes using the orientation of 3D cursor")
        )
    )

    @classmethod
    def poll(self, context):
        ob = context.active_object
        return ((ob is not None) and
                (ob.type in {'EMPTY', 'MESH'}) and
                (context.mode == 'OBJECT'))

    def execute(self, context):
        bpy.ops.gpencil.bake_mesh_animation(
            frame_start=self.frame_start,
            frame_end=self.frame_end,
            step=self.step,
            angle=self.angle,
            thickness=self.thickness,
            seams=self.seams,
            faces=self.faces,
            offset=self.offset,
            target=self.target,
            frame_target=self.frame_target,
            project_type=self.project_type
        )

        return {'FINISHED'}

    def invoke(self, context, _event):
        wm = context.window_manager
        return wm.invoke_props_dialog(self)


classes = (
    GPENCIL_OT_mesh_bake,
)