#!/usr/bin/env python3
import yaml
import sys
import json
from collections.abc import Mapping

def deep_merge_yaml(dict1, dict2):
    result = dict1.copy()
    for key, value in dict2.items():
        if key in result:
            if isinstance(result[key], list) and isinstance(value, list):
                result[key] = result[key] + value
            elif isinstance(result[key], Mapping) and isinstance(value, Mapping):
                result[key] = deep_merge_yaml(result[key], value)
            else:
                result[key] = value
        else:
            result[key] = value
    return result

def main():
    input_data = json.load(sys.stdin)
    file1 = input_data["file1"]
    file2 = input_data["file2"]

    with open(file1, "r") as f1, open(file2, "r") as f2:
        
        try:
            yaml1 = yaml.safe_load(f1)
        except yaml.YAMLError as e:
            print("Erro ao carregar YAML do primeiro ficheiro:")
            print(f1.read())
            raise e
        
        try:
            yaml2 = yaml.safe_load(f2)
        except yaml.YAMLError as e:
            print("Erro ao carregar YAML do segundo ficheiro:")
            print(f2.read())
            raise e


    merged = deep_merge_yaml(yaml1, yaml2)
    print(json.dumps({"merged_yaml": yaml.dump(merged, sort_keys=False)}))

if __name__ == "__main__":
    main()