import bpy
import numpy as np
from .dictionaries import bone_names

from typing import List, Optional
from bpy.types import Object, ShapeKey, Mesh, Context
from functools import lru_cache

### Clean up material names in the given mesh by removing the '.001' suffix.
def clean_material_names(mesh: Mesh) -> None:
    for j, mat in enumerate(mesh.material_slots):
        if mat.name.endswith(('.0+', ' 0+')):
            mesh.active_material_index = j
            mesh.active_material.name = mat.name[:-len(mat.name.rstrip('0')) - 1]


# This will fix faulty uv coordinates, cats did this a other way which can have unintended consequences, 
# this is the best way i could of think of doing this for the time being, however may need improvements.

def fix_uv_coordinates(context: Context) -> None:
    obj = context.object

    # Check if the object is in Edit Mode
    if obj.mode != 'EDIT':
        bpy.ops.object.mode_set(mode='EDIT')

    # Check if the object has any mesh data
    if obj.type == 'MESH' and obj.data:
        bpy.context.view_layer.objects.active = obj
        bpy.ops.mesh.select_all(action='SELECT')
        bpy.ops.uv.average_islands_scale()

        # Switch back to Object Mode
        bpy.ops.object.mode_set(mode='OBJECT')
    else:
        print("Object is not a valid mesh with UV data")

def has_shapekeys(mesh_obj: Object) -> bool:
    return mesh_obj.data.shape_keys is not None

@lru_cache(maxsize=None)
def _get_shape_key_co(shape_key: ShapeKey) -> np.ndarray:
    return np.array([v.co for v in shape_key.data])
    
def simplify_bonename(n):
    return n.lower().translate(dict.fromkeys(map(ord, u" _.")))
    
def get_armature(context, armature_name=None) -> Optional[Object]:
    if armature_name:
        obj = bpy.data.objects[armature_name]
        if obj.type == "ARMATURE":
            return obj
        else:
            return None
    if context.view_layer.objects.active:
        obj = context.view_layer.objects.active
        if obj.type == "ARMATURE":
            return obj
    return next((obj for obj in context.view_layer.objects if obj.type == 'ARMATURE'), None)

def has_shapekeys(mesh_obj):
    return mesh_obj.data.shape_keys is not None

def has_shapekeys(mesh_obj):
    return mesh_obj.data.shape_keys is not None

def sort_shape_keys(mesh):
    if not has_shapekeys(mesh):
        return

    order = [
        'Basis',
        'vrc.blink_left',
        'vrc.blink_right',
        'vrc.lowerlid_left',
        'vrc.lowerlid_right',
        'vrc.v_aa',
        'vrc.v_ch',
        'vrc.v_dd',
        'vrc.v_e',
        'vrc.v_ff',
        'vrc.v_ih',
        'vrc.v_kk',
        'vrc.v_nn',
        'vrc.v_oh',
        'vrc.v_ou',
        'vrc.v_pp',
        'vrc.v_rr',
        'vrc.v_sil',
        'vrc.v_ss',
        'vrc.v_th',
    ]

    shape_keys = mesh.data.shape_keys.key_blocks
    for i, name in enumerate(order):
        if name in shape_keys:
            index = shape_keys.find(name)
            if index != i:
                bpy.context.object.active_shape_key_index = index
                for _ in range(abs(index - i)):
                    bpy.ops.object.shape_key_move(type='UP' if index > i else 'DOWN')

    # Move any remaining shape keys to the end
    for key in shape_keys:
        if key.name not in order:
            index = shape_keys.find(key.name)
            bpy.context.object.active_shape_key_index = index
            for _ in range(len(shape_keys) - index - 1):
                bpy.ops.object.shape_key_move(type='DOWN')

def get_shapekeys(mesh, prefix=''):
    if not has_shapekeys(mesh):
        return []
    return [(key.name, key.name, key.name) for key in mesh.data.shape_keys.key_blocks if key.name != 'Basis' and key.name.startswith(prefix)]