# app/core/note_payload.py
# Line count: 118

from __future__ import annotations

from typing import Any, Dict, List, Optional, Union

# Public API:
#   make_note_payload(note, *, retriever_weight: Optional[float] = None) -> Dict[str, Any]
#
# Anforderungen:
# - Akzeptiert sowohl ParsedNote-ähnliche Objekte (Attribute) als auch Dicts.
# - Liest Felder bevorzugt aus Frontmatter:
#     id/title/type/tags/path (+ retriever_weight)
# - Fällt robust auf Note-Attribute zurück (note_id, title, type, tags, path).
# - Setzt retriever_weight nur, wenn vorhanden/angegeben (keine Defaults).
# - Gibt eine reine Payload (dict) zurück, die in Qdrant geschrieben werden kann.


def _get(obj: Any, key: str, default: Any = None) -> Any:
    """Robuste Getter-Funktion: erst Attribute, dann Dict-Keys."""
    if obj is None:
        return default
    # Attribute
    if hasattr(obj, key):
        try:
            val = getattr(obj, key)
            return val if val is not None else default
        except Exception:
            pass
    # Dict
    if isinstance(obj, dict):
        if key in obj:
            val = obj.get(key, default)
            return val if val is not None else default
    return default


def _get_frontmatter(note: Any) -> Dict[str, Any]:
    fm = _get(note, "frontmatter", None)
    if isinstance(fm, dict):
        return fm
    # Manche Parser legen Meta in "meta" ab
    meta = _get(note, "meta", None)
    if isinstance(meta, dict) and isinstance(meta.get("frontmatter"), dict):
        return meta["frontmatter"]
    # Fallback: leeres Dict
    return {}


def _get_from_frontmatter(fm: Dict[str, Any], key: str, default: Any = None) -> Any:
    if not isinstance(fm, dict):
        return default
    if key in fm:
        val = fm.get(key, default)
        return val if val is not None else default
    return default


def _coerce_tags(val: Any) -> List[str]:
    if val is None:
        return []
    if isinstance(val, list):
        return [str(x) for x in val]
    if isinstance(val, str):
        # YAML/Frontmatter kann tags als Komma-getrennte Zeichenkette liefern
        parts = [t.strip() for t in val.split(",")]
        return [p for p in parts if p]
    return []


def _resolve_retriever_weight(
    fm: Dict[str, Any],
    explicit: Optional[float],
) -> Optional[float]:
    # 1) explizit über Funktionsargument
    if explicit is not None:
        return explicit
    # 2) im Frontmatter direkt
    val = _get_from_frontmatter(fm, "retriever_weight", None)
    if isinstance(val, (int, float)):
        return float(val)
    # 3) verschachtelt: frontmatter.retriever.weight
    retr = fm.get("retriever")
    if isinstance(retr, dict):
        v = retr.get("weight")
        if isinstance(v, (int, float)):
            return float(v)
    return None


def make_note_payload(
    note: Any,
    *,
    retriever_weight: Optional[float] = None,
) -> Dict[str, Any]:
    """
    Baut eine Qdrant-Payload für eine Note.
    Erwartete Felder (wenn vorhanden): id/note_id, title, type, tags, path, text (optional)
    retriever_weight wird gesetzt, wenn vorhanden/angegeben.
    """
    fm = _get_frontmatter(note)

    # ID priorisieren: frontmatter.id > note.note_id > note.id
    note_id = _get_from_frontmatter(fm, "id", None)
    if note_id is None:
        note_id = _get(note, "note_id", None)
    if note_id is None:
        note_id = _get(note, "id", None)

    title = _get_from_frontmatter(fm, "title", None)
    if title is None:
        title = _get(note, "title", None)

    ntype = _get_from_frontmatter(fm, "type", None)
    if ntype is None:
        ntype = _get(note, "type", None)

    tags = _get_from_frontmatter(fm, "tags", None)
    if tags is None:
        tags = _get(note, "tags", None)
    tags = _coerce_tags(tags)

    path = _get_from_frontmatter(fm, "path", None)
    if path is None:
        path = _get(note, "path", None)
    # Einige Parser führen den Pfad als "source" / "filepath"
    if path is None:
        path = _get(note, "source", None)
    if path is None:
        path = _get(note, "filepath", None)

    # Optionaler Volltext (nicht immer sinnvoll in notes-collection)
    text = _get(note, "text", None)
    if text is None and isinstance(note, dict):
        # Parser variieren; manchmal "body" oder "content"
        text = note.get("body") or note.get("content")

    payload: Dict[str, Any] = {}
    if note_id is not None:
        # Für Abwärtskompatibilität beide Felder schreiben
        payload["id"] = note_id
        payload["note_id"] = note_id

    if title is not None:
        payload["title"] = title
    if ntype is not None:
        payload["type"] = ntype
    if tags:
        payload["tags"] = tags
    if path is not None:
        payload["path"] = path
    if text is not None:
        payload["text"] = text

    rw = _resolve_retriever_weight(fm, retriever_weight)
    if rw is not None:
        payload["retriever_weight"] = rw

    return payload