import argparse
import sys

from ruamel.yaml import YAML, YAMLError

yaml = YAML()
yaml.allow_unicode = True
yaml.allow_duplicate_keys = True


def ParentPath(parent, current, sep='.'):
    path = current
    if parent is not None:
        path = parent + sep + path
    return path


def CollectScalars(node, parent=None):
    scalars = []
    for key, value in node.items():
        if isinstance(value, dict):
            scalars.extend(CollectScalars(
                value, ParentPath(parent, key)
            ))
        else:
            scalars.append({
                'path': ParentPath(parent, key),
                'value': value
            })
    return scalars


def AnalyzeFile(stream):
    document = yaml.load(stream)
    scalars = CollectScalars(document)
    yaml.dump(scalars, sys.stdout)


if __name__ == '__main__':
    parser = argparse.ArgumentParser('yaml-scalar-mapper')
    parser.add_argument('source', help="The path to the yaml file to process")
    args = parser.parse_args()

    with open(args.source, 'r') as stream:
        AnalyzeFile(stream)