# ##### 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>

import bpy
from bpy.types import Operator
from bpy.props import (
        StringProperty,
        BoolProperty,
        CollectionProperty,
        )

# ########## Datablock previews... ##########


class WM_OT_previews_batch_generate(Operator):
    """Generate selected .blend file's previews"""
    bl_idname = "wm.previews_batch_generate"
    bl_label = "Batch-Generate Previews"
    bl_options = {'REGISTER'}

    # -----------
    # File props.
    files = CollectionProperty(
            type=bpy.types.OperatorFileListElement,
            options={'HIDDEN', 'SKIP_SAVE'},
            )

    directory = StringProperty(
            maxlen=1024,
            subtype='FILE_PATH',
            options={'HIDDEN', 'SKIP_SAVE'},
            )

    # Show only images/videos, and directories!
    filter_blender = BoolProperty(
            default=True,
            options={'HIDDEN', 'SKIP_SAVE'},
            )
    filter_folder = BoolProperty(
            default=True,
            options={'HIDDEN', 'SKIP_SAVE'},
            )

    # -----------
    # Own props.
    use_scenes = BoolProperty(
            default=True,
            name="Scenes",
            description="Generate scenes' previews",
            )
    use_groups = BoolProperty(
            default=True,
            name="Groups",
            description="Generate groups' previews",
            )
    use_objects = BoolProperty(
            default=True,
            name="Objects",
            description="Generate objects' previews",
            )
    use_intern_data = BoolProperty(
            default=True,
            name="Mat/Tex/...",
            description="Generate 'internal' previews (materials, textures, images, etc.)",
            )

    use_trusted = BoolProperty(
            default=False,
            name="Trusted Blend Files",
            description="Enable python evaluation for selected files",
            )

    def invoke(self, context, event):
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}

    def execute(self, context):
        if "subprocess" in locals():
            import imp
            imp.reload(preview_render)
        else:
            import os
            import subprocess
            from bl_previews_utils import bl_previews_render as preview_render

        context.window_manager.progress_begin(0, len(self.files))
        context.window_manager.progress_update(0)
        for i, fn in enumerate(self.files):
            blen_path = os.path.join(self.directory, fn.name)
            cmd = [
                bpy.app.binary_path,
                "--background",
                "--factory-startup",
                "-noaudio",
            ]
            if self.use_trusted:
                cmd.append("--enable-autoexec")
            cmd.extend([
                blen_path,
                "--python",
                os.path.join(os.path.dirname(preview_render.__file__), "bl_previews_render.py"),
                "--",
            ])
            if not self.use_scenes:
                cmd.append('--no_scenes')
            if not self.use_groups:
                cmd.append('--no_groups')
            if not self.use_objects:
                cmd.append('--no_objects')
            if not self.use_intern_data:
                cmd.append('--no_data_intern')
            if subprocess.call(cmd):
                self.report({'ERROR'}, "Previews generation process failed for file '%s'!" % blen_path)
                context.window_manager.progress_end()
                return {'CANCELLED'}
            context.window_manager.progress_update(i + 1)
        context.window_manager.progress_end()

        return {'FINISHED'}


class WM_OT_previews_batch_clear(Operator):
    """Clear selected .blend file's previews"""
    bl_idname = "wm.previews_batch_clear"
    bl_label = "Batch-Clear Previews"
    bl_options = {'REGISTER'}

    # -----------
    # File props.
    files = CollectionProperty(
            type=bpy.types.OperatorFileListElement,
            options={'HIDDEN', 'SKIP_SAVE'},
            )

    directory = StringProperty(
            maxlen=1024,
            subtype='FILE_PATH',
            options={'HIDDEN', 'SKIP_SAVE'},
            )

    # Show only images/videos, and directories!
    filter_blender = BoolProperty(
            default=True,
            options={'HIDDEN', 'SKIP_SAVE'},
            )
    filter_folder = BoolProperty(
            default=True,
            options={'HIDDEN', 'SKIP_SAVE'},
            )

    # -----------
    # Own props.
    use_scenes = BoolProperty(
            default=True,
            name="Scenes",
            description="Clear scenes' previews",
            )
    use_groups = BoolProperty(default=True,
            name="Groups",
            description="Clear groups' previews",
            )
    use_objects = BoolProperty(
            default=True,
            name="Objects",
            description="Clear objects' previews",
            )
    use_intern_data = BoolProperty(
            default=True,
            name="Mat/Tex/...",
            description="Clear 'internal' previews (materials, textures, images, etc.)",
            )

    use_trusted = BoolProperty(
            default=False,
            name="Trusted Blend Files",
            description="Enable python evaluation for selected files",
            )

    def invoke(self, context, event):
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}

    def execute(self, context):
        if "subprocess" in locals():
            import imp
            imp.reload(preview_render)
        else:
            import os
            import subprocess
            from bl_previews_utils import bl_previews_render as preview_render

        context.window_manager.progress_begin(0, len(self.files))
        context.window_manager.progress_update(0)
        for i, fn in enumerate(self.files):
            blen_path = os.path.join(self.directory, fn.name)
            cmd = [
                bpy.app.binary_path,
                "--background",
                "--factory-startup",
                "-noaudio",
            ]
            if self.use_trusted:
                cmd.append("--enable-autoexec")
            cmd.extend([
                blen_path,
                "--python",
                os.path.join(os.path.dirname(preview_render.__file__), "bl_previews_render.py"),
                "--",
                "--clear",
            ])
            if not self.use_scenes:
                cmd.append('--no_scenes')
            if not self.use_groups:
                cmd.append('--no_groups')
            if not self.use_objects:
                cmd.append('--no_objects')
            if not self.use_intern_data:
                cmd.append('--no_data_intern')
            if subprocess.call(cmd):
                self.report({'ERROR'}, "Previews clear process failed for file '%s'!" % blen_path)
                context.window_manager.progress_end()
                return {'CANCELLED'}
            context.window_manager.progress_update(i + 1)
        context.window_manager.progress_end()

        return {'FINISHED'}

