from pathlib import Path
from typing import List, Dict, Any, Tuple

import yaml
from yaml.loader import SafeLoader


def loads(content: str) -> Dict[str, Any]:
    """
    Load the given YAML string
    """

    template = list(yaml.load_all(content, Loader=SafeLineLoader))

    # Convert an empty file to an empty dict
    if template is None:
        template = {}

    return template


def load(filename: Path) -> Tuple[List[Dict[str, Any]], List[Tuple[int, str]]]:
    """
    Load the given YAML file
    """

    file_path = filename if isinstance(filename, Path) else Path(filename)
    content = file_path.read_text()

    file_lines = [(idx + 1, line) for idx, line in enumerate(content.splitlines(keepends=True))]

    template = loads(content)

    return (template, file_lines)


class SafeLineLoader(SafeLoader):
    def construct_mapping(self, node, deep=False):
        mapping = super(SafeLineLoader, self).construct_mapping(node, deep=deep)
        # Add 1 so line numbering starts at 1
        # mapping['__line__'] = node.start_mark.line + 1
        mapping['__startline__'] = node.start_mark.line + 1
        mapping['__endline__'] = node.end_mark.line + 1
        return mapping
