"""Handler for importing Markdown files into Obsidian."""

import shutil
from pathlib import Path

from utils.config import ensure_unique_path, sanitize_filename


def handle_markdown(file_path: Path, vault_path: Path) -> Path:
    """Import a Markdown file into the Obsidian vault.

    - Copies contents to a new note.
    - Uses the filename (without extension) as the note title.
    - Prepends a title heading if the file does not already start with it.
    """
    title = sanitize_filename(file_path.stem)
    target_name = f"{title}.md"
    target_path = ensure_unique_path(vault_path / target_name)

    content = file_path.read_text(encoding="utf-8")

    # Prepend title if the file doesn't already start with it as an H1
    first_line = content.splitlines()[0] if content.strip() else ""
    if not first_line.strip().startswith(f"# {title}"):
        content = f"# {title}\n\n{content}"

    target_path.write_text(content, encoding="utf-8")
    print(f"[MD] Created note: {target_path}")
    return target_path