import bpy

class KABECK_OT_get_diameter(bpy.types.Operator):
    bl_idname = "kabeck.get_diameter"
    bl_label = "Set Target from Selected"
    bl_description = "Measures the selected cable and sets the Target Diameter to its exact size"
    
    def execute(self, context):
        from . import utils
        obj = context.active_object
        if not obj or obj.type != 'MESH':
            self.report({'ERROR'}, "Select a cable first")
            return {'CANCELLED'}
        
        depsgraph = context.evaluated_depsgraph_get()
        eval_obj = obj.evaluated_get(depsgraph)
        dims = [eval_obj.dimensions.x, eval_obj.dimensions.y, eval_obj.dimensions.z]
        dims.sort()
        
        internal_scale = utils.get_internal_scale()
        # Convert internal units back to mm for the UI
        diam_mm = dims[1] / internal_scale if dims[1] > 0.0001 else 13.8
        
        context.scene.normalizer_target_diameter = diam_mm
        self.report({'INFO'}, f"Target Diameter set to {diam_mm:.2f} mm")
        return {'FINISHED'}