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

import bpy
import inspect
import os

from bpy.props import (
    BoolProperty,
    EnumProperty,
    FloatProperty,
    IntProperty,
    PointerProperty,
    StringProperty,
)

from bpy.types import (
    AddonPreferences,
    PropertyGroup,
)
from vse_toolbox.bl_utils import get_addon_prefs, get_scene_settings
from vse_toolbox.constants import (
    TRACKERS,
    TRACKERS_DIR,
)
from vse_toolbox.file_utils import (
    import_module_from_path,
    norm_str,
    read_file,
)
from vse_toolbox.resources.trackers.kitsu import Kitsu

def load_trackers():
    from vse_toolbox.resources.trackers.tracker  import Tracker

    TRACKERS.clear()
    tracker_files = list(TRACKERS_DIR.glob('*.py'))

    for tracker_file in tracker_files:
        if tracker_file.stem.startswith('_'):
            continue

        mod = import_module_from_path(tracker_file)
        for name, obj in inspect.getmembers(mod):

            if not inspect.isclass(obj): 
                continue

            if not Tracker in obj.__mro__:
                continue

            if obj is Tracker or name in (a.__name__ for a in TRACKERS): 
                continue

            try:
                print(f'Register Tracker {name}')
                bpy.utils.register_class(obj)
                #obj.register()

                setattr(Trackers, norm_str(name), PointerProperty(type=obj))
                TRACKERS.append(obj)
            except Exception as e:
                print(f'Could not register Tracker {name}')
                print(e)

def load_prefs():
    prefs = get_addon_prefs()
    prefs_config_file = prefs.config_path

    if not prefs_config_file:
        return

    prefs_datas = read_file(os.path.expandvars(prefs_config_file))

    for tracker_data in prefs_datas['trackers']:
        tracker_name = norm_str(tracker_data['name'])
        if not hasattr(prefs.trackers, tracker_name):
            continue
        
        tracker_pref = getattr(prefs.trackers, tracker_name) 

        if not tracker_pref:
            continue

        for k, v in tracker_data.items():
            if k in ('name',):
                continue
            setattr(tracker_pref, k, os.path.expandvars(v))

    prefs['tracker_name'] = prefs_datas['tracker_name']


class Trackers(PropertyGroup):
    def __iter__(self):
        return (getattr(self, p) for p in self.bl_rna.properties.keys() if p not in ('rna_type', 'name'))


class VSETB_Prefs(AddonPreferences):
    bl_idname = __package__

    trackers : PointerProperty(type=Trackers)
    expand_settings: BoolProperty(default=False)
    config_path : StringProperty(subtype='FILE_PATH')
    sort_metadata_items : BoolProperty(default=True)

    @property
    def tracker(self):
        return getattr(self.trackers, norm_str(get_scene_settings().tracker_name))

    def draw(self, context):
        prefs = get_addon_prefs()
        settings = get_scene_settings()

        layout = self.layout

        layout.prop(self, 'config_path', text='Config Path')
        layout.prop(self, "sort_metadata_items", text='Sort Metadata Items')

        col = layout.column(align=True)
        box = col.box()
        row = box.row(align=True)
        icon = "DISCLOSURE_TRI_DOWN" if self.expand_settings else "DISCLOSURE_TRI_RIGHT"
        row.prop(self, 'expand_settings', icon=icon, emboss=False, text='')
        row.label(icon='PREFERENCES')
        row.label(text='Tracker')
        subrow = row.row()
        subrow.alignment = 'RIGHT'
        subrow.operator("vse_toolbox.reload_addon", text='Reload Addon')

        if self.expand_settings:
            box.prop(settings, 'tracker_name', text='Tracker')
            self.tracker.draw_prefs(box)
            #row = box.row()
            box.operator("vse_toolbox.tracker_connect", text='Connect')


classes = [
    Trackers,
    VSETB_Prefs,
]


def register(): 
    for cls in classes:
        bpy.utils.register_class(cls)
    
    load_trackers()
    prefs = get_addon_prefs()
        
    config_path = os.getenv('VSE_TOOLBOX_CONFIG')
    if config_path:
        prefs['config_path'] = os.path.expandvars(config_path)

    load_prefs()

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