import bpy
import math
import os

try:
    from ..utils import get_addon_preferences
except (ImportError, ValueError):
    # Fallback if import fails (e.g., when run as script)
    def get_addon_preferences():
        test_names = ["bl_ext.vscode_development.AmazonCharacterTools", "amzncharactertools", "AmazonCharacterTools"]
        for addon_name in test_names:
            addon_prefs = bpy.context.preferences.addons.get(addon_name)
            if addon_prefs and hasattr(addon_prefs, 'preferences') and hasattr(addon_prefs.preferences, 'amzn_bsdf_materials_path'):
                return addon_prefs.preferences
        # Search all addons
        for addon_name in bpy.context.preferences.addons.keys():
            addon_prefs = bpy.context.preferences.addons.get(addon_name)
            if addon_prefs and hasattr(addon_prefs, 'preferences') and hasattr(addon_prefs.preferences, 'amzn_bsdf_materials_path'):
                return addon_prefs.preferences
        return None

def append_and_parent_device():
    # First, find and rename the existing Device to Device-Old
    old_device = bpy.data.objects.get('Device')
    if old_device:
        print("Found existing Device, renaming to Device-Old")
        old_device.name = 'Device-Old'
        # Store the transforms of the old device
        old_location = old_device.location.copy()
        old_rotation = old_device.rotation_euler.copy()
        old_scale = old_device.scale.copy()
        old_parent = old_device.parent
        old_parent_type = old_device.parent_type
        old_parent_bone = old_device.parent_bone
    else:
        print("No existing Device found, using default transforms")
        # Default transforms if no old device exists
        old_location = (-0.030083, 0.002195, -0.000632)
        old_rotation = (math.radians(-89.493), math.radians(0.63873), math.radians(85.309))
        old_scale = (1.0, 1.0, 1.0)
        # Get the active armature for default parenting
        active_armature = bpy.context.active_object
        if active_armature and active_armature.type == 'ARMATURE':
            old_parent = active_armature
            old_parent_type = 'BONE'
            old_parent_bone = 'DEF-forearm.L'
        else:
            old_parent = None
            old_parent_type = 'OBJECT'
            old_parent_bone = ''
    
    # Get path from addon preferences
    prefs = get_addon_preferences()
    if not prefs:
        print("Error: Could not access addon preferences")
        return
    
    device_blend_path = prefs.amzn_device_path
    
    if not device_blend_path or not os.path.exists(device_blend_path):
        print(f"Error: Device library path not set or file not found: {device_blend_path}")
        return
    
    # Append the Device object
    with bpy.data.libraries.load(device_blend_path, link=False) as (data_from, data_to):
        if 'Device' in data_from.objects:
            data_to.objects = ['Device']
    
    # Link the new Device to the current scene
    if 'Device' in bpy.data.objects:
        device_obj = bpy.data.objects['Device']
        bpy.context.collection.objects.link(device_obj)
        
        # Make it no longer an asset
        device_obj.asset_clear()
        
        # Apply the transforms from the old device
        device_obj.location = old_location
        device_obj.rotation_euler = old_rotation
        device_obj.scale = old_scale
        
        # Apply the parenting from the old device
        device_obj.parent = old_parent
        device_obj.parent_type = old_parent_type
        if old_parent_bone:
            device_obj.parent_bone = old_parent_bone
        
        print("Successfully appended new Device with old device transforms")
    else:
        print("Error: Device not found in blend file")
        return

def rename_device_band():
    # Find and rename arm-band or armband to device-band
    band_variants = ['arm-band', 'armband', 'Arm-band', 'Armband', 'ARM-BAND', 'ARMBAND']
    
    for variant in band_variants:
        obj = bpy.data.objects.get(variant)
        if obj:
            print(f"Found {variant}, renaming to device-band")
            obj.name = 'device-band'
            return True
    
    print("No arm-band or armband object found to rename")
    return False

def rename_geometry_data():
    # Select all geometry objects (meshes, curves, etc.)
    bpy.ops.object.select_all(action='DESELECT')
    
    renamed_count = 0
    skipped_count = 0
    not_in_view_layer_count = 0
    
    for obj in bpy.data.objects:
        if obj.type in ['MESH', 'CURVE', 'SURFACE', 'META']:
            # Check if object is in current view layer before selecting
            if obj.name in bpy.context.view_layer.objects:
                obj.select_set(True)
            else:
                not_in_view_layer_count += 1
                skipped_count += 1
            # Try to rename the data directly
            try:
                if obj.data and obj.data.name != obj.name:
                    # Check if data is shared with other objects
                    data_users = [o for o in bpy.data.objects if o.data == obj.data]
                    if len(data_users) == 1:
                        # Only one user, safe to rename
                        obj.data.name = obj.name
                        renamed_count += 1
                    else:
                        skipped_count += 1
            except AttributeError:
                skipped_count += 1
    
    # Set the first selected object as active (for any remaining operations)
    selected_objects = [obj for obj in bpy.data.objects if obj.select_get()]
    if selected_objects:
        bpy.context.view_layer.objects.active = selected_objects[0]
        # Now run the operator on the selection
        bpy.ops.renaming.data_name_from_obj()
    
    print(f"Renamed {renamed_count} objects, skipped {skipped_count} objects (not in view layer: {not_in_view_layer_count})")

# Execute all operations
append_and_parent_device()
rename_device_band()
rename_geometry_data()