import bpy
import bmesh

# Delete default objects
bpy.ops.object.select_all(action='SELECT')
bpy.ops.object.delete(use_global=False)

# Create an Icosphere
bpy.ops.mesh.primitive_ico_sphere_add(subdivisions=4, radius=1.0, location=(0, 0, 0))
obj = bpy.context.active_object
obj.name = "CrystalMesh"

# Add Subdivision Surface Modifier
subdiv = obj.modifiers.new(name="Subdivision", type='SUBSURF')
subdiv.levels = 2
subdiv.render_levels = 2

# Add Displacement Modifier with Voronoi Texture
disp = obj.modifiers.new(name="Displace", type='DISPLACE')
tex = bpy.data.textures.new("VoronoiTex", type='DISTORTED_NOISE')
tex.distortion = 1.0
disp.texture = tex
disp.strength = 0.3

# Add Bevel Modifier
bevel = obj.modifiers.new(name="Bevel", type='BEVEL')
bevel.width = 0.02
bevel.segments = 2
bevel.limit_method = 'ANGLE'

# Apply all modifiers
bpy.ops.object.convert(target='MESH')

# Create a new material
mat = bpy.data.materials.new(name="CrystalMaterial")
mat.use_nodes = True
nodes = mat.node_tree.nodes
links = mat.node_tree.links

# Clear default nodes
for node in nodes:
    nodes.remove(node)

# Create nodes
output = nodes.new(type='ShaderNodeOutputMaterial')
principled = nodes.new(type='ShaderNodeBsdfPrincipled')
fresnel = nodes.new(type='ShaderNodeFresnel')
emission = nodes.new(type='ShaderNodeEmission')
mix_shader = nodes.new(type='ShaderNodeMixShader')

# Set node properties
principled.inputs['Base Color'].default_value = (0.5, 0.2, 1.0, 1)  # Violet
principled.inputs['Transmission'].default_value = 0.8
principled.inputs['Roughness'].default_value = 0.1
emission.inputs['Color'].default_value = (1.0, 1.0, 1.0, 1)
emission.inputs['Strength'].default_value = 5.0

# Link nodes
links.new(fresnel.outputs[0], mix_shader.inputs[0])
links.new(principled.outputs[0], mix_shader.inputs[1])
links.new(emission.outputs[0], mix_shader.inputs[2])
links.new(mix_shader.outputs[0], output.inputs[0])

# Assign material to object
obj.data.materials.append(mat)

# Unwrap UVs
bpy.ops.object.mode_set(mode='EDIT')
bpy.ops.uv.smart_project()
bpy.ops.object.mode_set(mode='OBJECT')

# Export as FBX
bpy.ops.export_scene.fbx(filepath="CrystalMesh.fbx", use_selection=True)

# Export as GLTF
bpy.ops.export_scene.gltf(filepath="CrystalMesh.glb", export_format='GLB', use_selection=True)