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

from docforge.nav.resolver import ResolvedNav


class MkDocsNavEmitter:
    """Emit MkDocs-compatible nav structures."""

    def emit(self, nav: ResolvedNav) -> List[Dict[str, Any]]:
        result: List[Dict[str, Any]] = []

        # Home entry (semantic path)
        if nav.home:
            result.append({"Home": nav.home})

        # Group entries
        for group, paths in nav.groups.items():
            entries: List[str] = []
            for p in paths:
                # Convert filesystem path back to docs-relative path
                entries.append(self._to_relative(p))
            result.append({group: entries})

        return result

    def _to_relative(self, path: Path) -> str:
        """
        Convert a filesystem path to a docs-relative path.
        """
        # Normalize to POSIX-style for MkDocs
        return path.as_posix().split("/docs/", 1)[-1]