# SPDX-License-Identifier: GPL-2.0-or-later

import bpy
import os

from bpy.props import (
    BoolProperty,
    CollectionProperty, 
    EnumProperty,
    IntProperty,
    PointerProperty,
    StringProperty,
)
from bpy.types import PropertyGroup, UIList
from pprint import pprint as pp
from vse_toolbox.bl_utils import get_addon_prefs, get_scene_settings
from vse_toolbox.constants import ASSET_PREVIEWS, TRACKERS
from vse_toolbox.file_utils import norm_str


def get_episodes_items(self, context):
    settings = get_scene_settings()

    project = settings.active_project
    if not project:
        return [('NONE', 'None', '', 0)]

    episodes = project.episodes
    if not episodes:
        return [('NONE', 'None', '', 0)]
    
    return [(e, e, '', i) for i, e in enumerate(episodes.keys())]

def get_project_items(self, context):
    if not self.projects:
        return [('NONE', 'None', '', 0)]
    
    return [(p, p, '', i) for i, p in enumerate(self.projects.keys())]

def update_episodes(self, context):
    settings = get_scene_settings()
    settings['episodes'] = 0
    
def get_tracker_items(self, context):
    return [(norm_str(a.name, format=str.upper), a.name, "", i) for i, a in enumerate(TRACKERS)]


class Asset(PropertyGroup):
    name : StringProperty(default='')
    id : StringProperty(default='')
    norm_name : StringProperty(default='')
    asset_type : StringProperty(default='')
    tracker_name : StringProperty(default='')
    preview : StringProperty(default='')
    
    @property
    def label(self):
        return f"{self.asset_type} / {self.norm_name}"

    @property
    def icon_id(self):
        ico = ASSET_PREVIEWS.get(self.preview)
        if ico:
            return ico.icon_id


class AssetCasting(PropertyGroup):
    id : StringProperty(default='')
    instance : IntProperty(default=1)

    def __iter__(self):
        return (getattr(self, p) for p in self.bl_rna.properties.keys() if p not in ('rna_type', 'name'))
    
    @property
    def asset(self):
        settings = get_scene_settings()
        project = settings.active_project
        return project.assets.get(self.id)

    def to_dict(self):
        return {k: v for k,v in self.items()}

class Episode(PropertyGroup):
    id : StringProperty(default='')

    @property
    def active(self):
        settings = get_scene_settings()
        return self.get(settings.project_name)

    
class Project(PropertyGroup):
    id : StringProperty(default='')

    sequence_increment : IntProperty(
    name="Sequence Increment", default=10, min=0, step=10)

    shot_increment : IntProperty(
        name="Shot Increment", default=10, min=0, step=10)

    sequence_template : StringProperty(
        name="Sequence Name", default="sq{index:03d}")

    episode_template : StringProperty(
        name="Episode Name", default="e{index:03d}")

    shot_template : StringProperty(
        name="Shot Name", default="{episode}s{index:04d}")
    
    episode_name : EnumProperty(items=get_episodes_items)
    episodes : CollectionProperty(type=Episode)
    assets : CollectionProperty(type=Asset)


#FIXME Trouver une solution pour mettre des method dans les CollectionProperty
class Projects(PropertyGroup):
    pass
    # @property
    # def active(self):
    #     settings = get_scene_settings()
    #     return self.get(settings.project_name)


class VSETB_UL_casting(UIList):

    order_by_type : BoolProperty(default=False)

    def draw_item(self, context, layout, data, item, icon, active_data,
                  active_propname, index):

        settings = get_scene_settings()
        project = settings.active_project
        
        # asset = next((a for a in project.assets if a.id == item.id), None)
        asset = item.asset
        if asset is None:
            #TODO deal if asset was removed
            pass

        icon_id = asset.icon_id
        params = {'icon_value': icon_id} if icon_id else {'icon': 'BLANK1'}

        # Make sure your code supports all 3 layout types
        if self.layout_type in {'DEFAULT', 'COMPACT'}:
            layout.label(**params)
            split = layout.split(factor=0.6)
            split.label(text=f"{asset.norm_name.title()}")
            split.label(text=f"{asset.asset_type.title()}")
            split.prop(item, 'instance', text='')

        elif self.layout_type in {'GRID'}:
            layout.alignment = 'CENTER'
            layout.label(text="")

    def draw_filter(self, context, layout):
        row = layout.row()

        subrow = row.row(align=True)
        subrow.prop(self, "filter_name", text="")
        subrow.prop(self, "use_filter_invert", text="", icon='ARROW_LEFTRIGHT')
        
        subrow.separator()
        subrow.prop(self, "order_by_type", text="Order by Type", icon='MESH_DATA')

    def filter_items(self, context, data, propname):
        """Filter and order items in the list."""
        
        helper_funcs = bpy.types.UI_UL_list
        
        filtered = []
        ordered = []
        items = getattr(data, propname)

        # Filtering by name
        if self.filter_name:
            filtered = helper_funcs.filter_items_by_name(self.filter_name, self.bitflag_filter_item, items, "name",
                                                          reverse=self.use_filter_sort_alpha)
        # Order by types
        if self.order_by_type:
            _sort = [(idx, casting_item) for idx, casting_item in enumerate(items)]
            sort_items = helper_funcs.sort_items_helper
            ordered = sort_items(_sort, lambda x: x[1].asset.label)

        return filtered, ordered
            

class VSETB_PGT_scene_settings(PropertyGroup):

    projects : CollectionProperty(type=Project)
    project_name : EnumProperty(items=get_project_items, update=update_episodes)
    tracker_name : EnumProperty(items=get_tracker_items)
    toogle_prefs : BoolProperty(description='Toogle VSE ToolBox Preferences', default=True)
    auto_select_strip : BoolProperty(
        name='Auto Select Strip',description='Auto select strip', default=True)
    channel : EnumProperty(
        items=[
            ('AUDIO', 'Audio', '', 0),
            ('MOVIE', 'Movie', '', 1),
            ('SHOTS', 'Shots', '', 2),
            ('SEQUENCES', 'Sequences', '', 3),
        ]
    )
    
    sequence_channel_name : StringProperty(
        name="Sequences Channel Name", default="Sequences")

    shot_channel_name : StringProperty(
        name="Shot Channel Name", default="Shots")

    @property
    def active_project(self):
        settings = get_scene_settings()
        return settings.projects.get(settings.project_name)

    @property
    def active_episode(self):
        project = self.active_project
        if project:
            return project.episodes.get(project.episode_name)
            

class VSETB_PGT_strip_settings(PropertyGroup):
    casting : CollectionProperty(type=AssetCasting)
    casting_index : IntProperty(name='Casting Index', default=0)
    source_name : StringProperty(name='')

classes=(
    Asset,
    Episode,
    Project,
    AssetCasting,
    VSETB_UL_casting,
    VSETB_PGT_scene_settings,
    VSETB_PGT_strip_settings,
)


def register(): 
    for cls in classes:
        bpy.utils.register_class(cls)
        
    bpy.types.Scene.vsetb_settings = PointerProperty(type=VSETB_PGT_scene_settings)
    bpy.types.Sequence.vsetb_strip_settings = PointerProperty(type=VSETB_PGT_strip_settings)


def unregister():
    for cls in reversed(classes):
        bpy.utils.unregister_class(cls)

    del bpy.types.Sequence.vsetb_strip_settings
    del bpy.types.Scene.vsetb_settings