import os
import json
import yaml

def collect_regex_pattern(service, file_name, input_json, output_dir):
    # Find the first pattern in specifications
    pattern = None

    for spec in input_json.get('specifications', []):
      implementation = spec.get('implementation')
      if implementation not in ['ReleaseTitleSpecification', 'ReleaseGroupSpecification']:
          continue

      pattern = spec.get('fields', {}).get('value')
      if not pattern:
          continue
      # Compose YAML structure
      name = input_json.get('name', '')
      yml_data = {
          'name': name,
          'pattern': pattern,
          'description': "",
          'tags': [],
      }

      # Output path
      output_path = os.path.join(output_dir, f"{file_name}.yml")
      with open(output_path, 'w', encoding='utf-8') as f:
          yaml.dump(yml_data, f, sort_keys=False, allow_unicode=True)
      print(f"Generated: {output_path}")


def collect_regex_patterns(service, input_dir, output_dir):
    for root, _, files in os.walk(input_dir):
        for filename in files:
            if not filename.endswith('.json'):
                continue

            file_path = os.path.join(root, filename)
            file_stem = os.path.splitext(filename)[0]  # Filename without extension
            with open(file_path, 'r', encoding='utf-8') as f:
                data = json.load(f)
            collect_regex_pattern(service, file_stem, data, output_dir)