#!/usr/bin/env python3
"""
Data processor script that uses YAML configurations.
This provides a more flexible and maintainable approach than command-line arguments alone.
"""

import sys
import os
import subprocess
from pathlib import Path
from utils.config.config_manager import ConfigManager

def run_with_yaml_config(config_path: str, **cli_overrides):
    """Run data processor with YAML configuration"""
    print(f"=== Running with YAML config: {config_path} ===")
    
    cmd = [
        "python", "pipelines/classification/data_processor.py",
        "--config", config_path
    ]
    
    # Add CLI overrides
    for key, value in cli_overrides.items():
        if value is not None:
            cmd.extend([f"--{key.replace('_', '-')}", str(value)])
    
    print(f"Running command: {' '.join(cmd)}")
    print()
    
    try:
        result = subprocess.run(cmd, check=True, capture_output=True, text=True)
        print("✅ Data processing completed successfully!")
        print(result.stdout)
        return True
    except subprocess.CalledProcessError as e:
        print(f"❌ Error running data processor: {e}")
        print(f"Error output: {e.stderr}")
        return False

def run_classification_examples():
    """Run classification examples with YAML configs"""
    
    # Example 1: Emotion classification
    print("=== Example 1: Emotion Classification ===")
    success = run_with_yaml_config(
        "configs/classification/emotion.yaml",
        max_samples=500,  # Override YAML value
        output_dir="./data/emotion_small"
    )
    
    if success:
        print("✅ Emotion classification completed!")
    
    # Example 2: Custom dataset (if available)
    print("\n=== Example 2: Custom Dataset ===")
    if os.path.exists("data/classification/train.jsonl"):
        success = run_with_yaml_config(
            "configs/classification/custom.yaml",  # You can create this
            data_source="custom",
            data_path="data/classification/train.jsonl",
            output_dir="./data/custom_processed"
        )
        if success:
            print("✅ Custom dataset processing completed!")
    else:
        print("⚠️  Custom dataset not found, skipping...")

def create_custom_config():
    """Create a custom configuration file"""
    custom_config = """task:
  name: "classification"
  type: "sequence_classification"

data:
  source: "custom"
  data_format: "jsonl"
  input_field: "text"
  label_field: "label"
  max_samples: 1000
  train_split: 0.8
  validation_split: 0.1
  test_split: 0.1

processing:
  clean_text: true
  lowercase: true
  min_length: 10
  max_length: 1000

output:
  output_dir: "./data/custom_processed"
  output_format: "classification"
"""
    
    config_path = "configs/classification/custom.yaml"
    with open(config_path, 'w') as f:
        f.write(custom_config)
    
    print(f"✅ Created custom config: {config_path}")

def show_yaml_benefits():
    """Show the benefits of using YAML configurations"""
    print("=== YAML Configuration Benefits ===")
    print()
    print("1. **Separation of Concerns**:")
    print("   - Configuration separate from code")
    print("   - Easy to version control configs")
    print("   - No need to modify scripts for different experiments")
    print()
    print("2. **Flexibility**:")
    print("   - Can override YAML values with CLI args")
    print("   - Multiple configs for different experiments")
    print("   - Easy to share and reproduce experiments")
    print()
    print("3. **Maintainability**:")
    print("   - All parameters in one place")
    print("   - Easy to understand and modify")
    print("   - Self-documenting configurations")
    print()
    print("4. **Scalability**:")
    print("   - Easy to add new parameters")
    print("   - Hierarchical configuration structure")
    print("   - Support for complex nested configurations")
    print()
    print("=== Usage Examples ===")
    print()
    print("1. Use YAML config only:")
    print("   python scripts/run_data_processor_yaml.py --config configs/classification/emotion.yaml")
    print()
    print("2. Override YAML values:")
    print("   python scripts/run_data_processor_yaml.py --config configs/classification/emotion.yaml --max-samples 500")
    print()
    print("3. Use CLI only (backward compatibility):")
    print("   python scripts/run_data_processor_yaml.py --data-source huggingface --dataset-name dair-ai/emotion")

def main():
    """Main function"""
    if len(sys.argv) > 1:
        if sys.argv[1] == "examples":
            run_classification_examples()
        elif sys.argv[1] == "create-config":
            create_custom_config()
        elif sys.argv[1] == "benefits":
            show_yaml_benefits()
        else:
            print(f"Unknown option: {sys.argv[1]}")
            print("Use: python scripts/run_data_processor_yaml.py [examples|create-config|benefits]")
    else:
        print("YAML-Based Data Processor")
        print("========================")
        print()
        print("This script demonstrates using YAML configurations instead of")
        print("command-line arguments for better flexibility and maintainability.")
        print()
        print("Usage:")
        print("  python scripts/run_data_processor_yaml.py examples     # Run examples")
        print("  python scripts/run_data_processor_yaml.py create-config # Create custom config")
        print("  python scripts/run_data_processor_yaml.py benefits      # Show YAML benefits")
        print()
        print("Benefits of YAML configurations:")
        print("  ✅ Easier to manage complex configurations")
        print("  ✅ Version control friendly")
        print("  ✅ Self-documenting")
        print("  ✅ Can still override with CLI args")
        print("  ✅ Better for team collaboration")

if __name__ == "__main__":
    main()