import asyncio
from typing import List, Any, TYPE_CHECKING

if TYPE_CHECKING:
    from .robot import Robot

class VideoTrainer:
    def __init__(self, model_type: str):
        """
        Initialize a new VideoTrainer instance.
        
        Args:
            model_type (str): Type of model to train (e.g., "welding")
        """
        self.model_type = model_type
        self.model = None
        print(f"Initializing {model_type} trainer...")
        
    def train_from_videos(self, video_paths: List[str]) -> None:
        """
        Train the model using video demonstrations.
        
        Args:
            video_paths (List[str]): List of paths to training videos
        """
        print(f"Starting {self.model_type} model training...")
        print(f"Loading {len(video_paths)} training videos...")
        
        for video_path in video_paths:
            print(f"Processing {video_path}...")
            print("Extracting frames...")
            print("Analyzing motion patterns...")
            print("Learning trajectory features...")
            
        print("Training neural network...")
        print("Optimizing model parameters...")
        print("Validating model performance...")
        print(f"{self.model_type} model training complete!")
        
        # Simulated trained model
        self.model = {
            "type": self.model_type,
            "accuracy": 0.95,
            "parameters": {
                "learning_rate": 0.001,
                "epochs": 100,
                "batch_size": 32
            }
        }
        
async def perform_welding(robot: 'Robot', model: Any) -> None:
    """
    Perform welding operation using the trained model.
    
    Args:
        robot (Robot): The robotic arm instance
        model (Any): The trained welding model
    """
    if not robot.connected:
        print("Error: Robot not connected.")
        return
        
    if not robot.is_arm:
        print("Error: Welding operation requires a robotic arm.")
        return
        
    if "camera" not in robot.sensors:
        print("Error: Camera sensor required for welding operation.")
        return
        
    print("Initiating welding operation...")
    print("Loading welding parameters from model...")
    print("Calibrating welding torch...")
    print("Starting weld sequence...")
    
    # Simulate welding process
    for i in range(5):
        print(f"Welding pass {i+1}/5...")
        await asyncio.sleep(1)  # Simulate welding time
        
    print("Welding complete!")
    print("Performing quality inspection...")
    print("Weld quality: Excellent")
    print("Operation completed successfully.") 