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"""
Main pipeline runner for temporal reasoning audio dataset generation.

This script orchestrates the generation of all task datasets.
"""

import argparse
import sys
import yaml
from pathlib import Path
from typing import List, Optional

# Add project root to path
sys.path.append(str(Path(__file__).parent))

from utils import setup_logger, set_random_seed
from tasks.task_count import CountTaskGenerator
from tasks.task_duration import DurationTaskGenerator
from tasks.task_order import OrderTaskGenerator
from tasks.task_volume import VolumeTaskGenerator


def load_config(config_path: str) -> dict:
    """Load configuration from YAML file."""
    with open(config_path, 'r') as f:
        config = yaml.safe_load(f)
    return config


def run_count_task(config: dict, logger):
    """Run the count task generation."""
    if not config['tasks']['count']['enabled']:
        logger.info("Count task is disabled, skipping...")
        return
    
    logger.info("=" * 80)
    logger.info("STARTING COUNT TASK GENERATION")
    logger.info("=" * 80)
    
    generator = CountTaskGenerator(config, logger)
    generator.dataset.reset_category_usage()  # Reset counter for this task
    generator.generate_dataset()
    
    # Log category usage statistics
    usage_stats = generator.dataset.get_category_usage_stats()
    sorted_stats = sorted(usage_stats.items(), key=lambda x: x[1], reverse=True)
    logger.info("Category usage statistics (as answers):")
    logger.info(f"  Min usage: {sorted_stats[-1][1]} (category: {sorted_stats[-1][0]})")
    logger.info(f"  Max usage: {sorted_stats[0][1]} (category: {sorted_stats[0][0]})")
    logger.info(f"  Mean usage: {sum(usage_stats.values()) / len(usage_stats):.2f}")
    
    logger.info("Count task completed successfully!")


def run_duration_task(config: dict, logger):
    """Run the duration task generation."""
    if not config['tasks']['duration']['enabled']:
        logger.info("Duration task is disabled, skipping...")
        return
    
    logger.info("=" * 80)
    logger.info("STARTING DURATION TASK GENERATION")
    logger.info("=" * 80)
    
    generator = DurationTaskGenerator(config, logger)
    generator.dataset.reset_category_usage()  # Reset counter for this task
    generator.generate_dataset()
    
    # Log category usage statistics
    usage_stats = generator.dataset.get_category_usage_stats()
    sorted_stats = sorted(usage_stats.items(), key=lambda x: x[1], reverse=True)
    logger.info("Category usage statistics (as longest/shortest answers):")
    logger.info(f"  Min usage: {sorted_stats[-1][1]} (category: {sorted_stats[-1][0]})")
    logger.info(f"  Max usage: {sorted_stats[0][1]} (category: {sorted_stats[0][0]})")
    logger.info(f"  Mean usage: {sum(usage_stats.values()) / len(usage_stats):.2f}")
    
    logger.info("Duration task completed successfully!")


def run_order_task(config: dict, logger):
    """Run the order task generation."""
    if not config['tasks']['order']['enabled']:
        logger.info("Order task is disabled, skipping...")
        return
    
    logger.info("=" * 80)
    logger.info("STARTING ORDER TASK GENERATION")
    logger.info("=" * 80)
    
    generator = OrderTaskGenerator(config, logger)
    generator.dataset.reset_category_usage()  # Reset counter for this task
    generator.generate_dataset()
    
    # Log category usage statistics
    usage_stats = generator.dataset.get_category_usage_stats()
    sorted_stats = sorted(usage_stats.items(), key=lambda x: x[1], reverse=True)
    logger.info("Category usage statistics (as first/last/after/before answers):")
    logger.info(f"  Min usage: {sorted_stats[-1][1]} (category: {sorted_stats[-1][0]})")
    logger.info(f"  Max usage: {sorted_stats[0][1]} (category: {sorted_stats[0][0]})")
    logger.info(f"  Mean usage: {sum(usage_stats.values()) / len(usage_stats):.2f}")
    
    logger.info("Order task completed successfully!")


def run_volume_task(config: dict, logger):
    """Run the volume task generation."""
    if not config['tasks']['volume']['enabled']:
        logger.info("Volume task is disabled, skipping...")
        return
    
    logger.info("=" * 80)
    logger.info("STARTING VOLUME TASK GENERATION")
    logger.info("=" * 80)
    
    generator = VolumeTaskGenerator(config, logger)
    generator.dataset.reset_category_usage()  # Reset counter for this task
    generator.generate_dataset()
    
    # Log category usage statistics
    usage_stats = generator.dataset.get_category_usage_stats()
    sorted_stats = sorted(usage_stats.items(), key=lambda x: x[1], reverse=True)
    logger.info("Category usage statistics (as loudest/softest answers):")
    logger.info(f"  Min usage: {sorted_stats[-1][1]} (category: {sorted_stats[-1][0]})")
    logger.info(f"  Max usage: {sorted_stats[0][1]} (category: {sorted_stats[0][0]})")
    logger.info(f"  Mean usage: {sum(usage_stats.values()) / len(usage_stats):.2f}")
    
    logger.info("Volume task completed successfully!")


def run_pipeline(
    config_path: str,
    tasks: Optional[List[str]] = None,
    output_path: Optional[str] = None
):
    """
    Run the complete dataset generation pipeline.
    
    Args:
        config_path: Path to configuration YAML file
        tasks: Optional list of specific tasks to run (default: all enabled tasks)
        output_path: Optional custom output path (overrides config)
    """
    # Load configuration
    config = load_config(config_path)
    
    # Override output path if provided
    if output_path:
        config['output']['base_path'] = output_path
    
    # Create output directory
    output_base = Path(config['output']['base_path'])
    output_base.mkdir(parents=True, exist_ok=True)
    
    # Set random seed
    set_random_seed(config['random_seed'])
    
    # Setup main logger
    logger = setup_logger(
        'pipeline',
        log_file=str(output_base / config['logging']['log_file']),
        level=config['logging']['level'],
        console_output=config['logging']['console_output']
    )
    
    logger.info("=" * 80)
    logger.info("TEMPORAL REASONING AUDIO DATASET GENERATION PIPELINE")
    logger.info("=" * 80)
    logger.info(f"Configuration: {config_path}")
    logger.info(f"Output directory: {output_base}")
    logger.info(f"Random seed: {config['random_seed']}")
    logger.info(f"ESC-50 audio path: {config['esc50']['audio_path']}")
    logger.info(f"ESC-50 metadata path: {config['esc50']['metadata_path']}")
    
    # Determine which tasks to run
    task_map = {
        'count': run_count_task,
        'duration': run_duration_task,
        'order': run_order_task,
        'volume': run_volume_task
    }
    
    if tasks:
        tasks_to_run = {k: v for k, v in task_map.items() if k in tasks}
        logger.info(f"Running specific tasks: {', '.join(tasks)}")
    else:
        tasks_to_run = task_map
        logger.info("Running all enabled tasks")
    
    # Run tasks
    for task_name, task_func in tasks_to_run.items():
        try:
            task_func(config, logger)
        except Exception as e:
            logger.error(f"Error running {task_name} task: {e}", exc_info=True)
            raise
    
    logger.info("=" * 80)
    logger.info("PIPELINE COMPLETED SUCCESSFULLY!")
    logger.info("=" * 80)
    logger.info(f"All outputs saved to: {output_base}")


def main():
    """Main entry point with argument parsing."""
    parser = argparse.ArgumentParser(
        description="Temporal Reasoning Audio Dataset Generation Pipeline",
        formatter_class=argparse.RawDescriptionHelpFormatter,
        epilog="""
Examples:
  # Run all tasks with default config
  python main.py
  
  # Run with custom config
  python main.py --config my_config.yaml
  
  # Run specific tasks only
  python main.py --tasks count duration
  
  # Use custom output directory
  python main.py --output /path/to/output
  
  # Combine options
  python main.py --config custom.yaml --tasks count order --output ./my_dataset
        """
    )
    
    parser.add_argument(
        '--config', '-c',
        type=str,
        default='config.yaml',
        help='Path to configuration YAML file (default: config.yaml)'
    )
    
    parser.add_argument(
        '--tasks', '-t',
        nargs='+',
        choices=['count', 'duration', 'order', 'volume'],
        help='Specific tasks to run (default: all enabled tasks)'
    )
    
    parser.add_argument(
        '--output', '-o',
        type=str,
        help='Custom output directory (overrides config)'
    )
    
    args = parser.parse_args()
    
    # Check if config file exists
    config_path = Path(args.config)
    if not config_path.exists():
        # Try relative to script directory
        script_dir = Path(__file__).parent
        config_path = script_dir / args.config
        if not config_path.exists():
            print(f"Error: Config file not found: {args.config}")
            sys.exit(1)
    
    # Run pipeline
    try:
        run_pipeline(
            config_path=str(config_path),
            tasks=args.tasks,
            output_path=args.output
        )
    except Exception as e:
        print(f"Pipeline failed with error: {e}")
        sys.exit(1)


if __name__ == '__main__':
    main()