# app/core/note_payload.py
# Version: 1.2.0 (2025-11-08)
# Purpose:
#   Build robust Qdrant payloads for NOTE points.
#
# Highlights:
#   - Works with both dict-like inputs and ParsedNote-like objects (attribute access).
#   - Accepts legacy/extra kwargs (e.g., vault_root) without failing.
#   - Copies canonical fields: id/note_id, title, type, tags, path, text (if present).
#   - Reliably propagates `retriever_weight` into the payload if set in frontmatter
#     (frontmatter.retriever_weight or frontmatter.retriever.weight) or provided explicitly.
#
# Backward compatibility:
#   - Signature accepts **kwargs (e.g., vault_root) because some callers pass it.
#   - Both 'id' and 'note_id' are written for compatibility with existing queries.
#
# Usage:
#   payload = make_note_payload(parsed_note, retriever_weight=None, vault_root="/path/to/vault")
#
# Changelog:
#   1.2.0  (2025-11-08)  Accept legacy kwargs, robust getters, propagate retriever_weight.
#   1.1.0  (2025-11-08)  Initial robust rewrite with attribute/dict support.

from __future__ import annotations

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


def _get(obj: Any, key: str, default: Any = None) -> Any:
    """Robust getter: attribute first, then dict."""
    if obj is None:
        return default
    if hasattr(obj, key):
        try:
            val = getattr(obj, key)
            return default if val is None else val
        except Exception:
            pass
    if isinstance(obj, dict):
        if key in obj:
            val = obj.get(key, default)
            return default if val is None else val
    return default


def _get_frontmatter(note: Any) -> Dict[str, Any]:
    fm = _get(note, "frontmatter", None)
    if isinstance(fm, dict):
        return fm
    meta = _get(note, "meta", None)
    if isinstance(meta, dict) and isinstance(meta.get("frontmatter"), dict):
        return meta["frontmatter"]
    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 default if val is None else val
    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):
        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) explicit argument wins
    if explicit is not None:
        try:
            return float(explicit)
        except Exception:
            return None
    # 2) frontmatter.retriever_weight
    val = _get_from_frontmatter(fm, "retriever_weight", None)
    if isinstance(val, (int, float)):
        return float(val)
    # 3) 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 _resolve_path(note: Any, fm: Dict[str, Any], vault_root: Optional[str]) -> Optional[str]:
    """Try to determine a stable relative path for diagnostics/traceability."""
    path = _get_from_frontmatter(fm, "path", None)
    if path is None:
        path = _get(note, "path", None) or _get(note, "source", None) or _get(note, "filepath", None)
    if path is None:
        return None
    try:
        if vault_root:
            vr = Path(vault_root)
            # Avoid Windows drive quirks: use Pure/Path consistently
            rel = Path(path)
            try:
                path_rel = str(rel.relative_to(vr))
            except Exception:
                # If 'path' is absolute not under vault_root, just return as-is
                path_rel = str(rel)
            return path_rel
    except Exception:
        pass
    return str(path)


def make_note_payload(
    note: Any,
    *,
    retriever_weight: Optional[float] = None,
    vault_root: Optional[str] = None,
    **kwargs,
) -> Dict[str, Any]:
    """
    Build a Qdrant payload dict for a NOTE.

    Parameters
    ----------
    note : Any
        Parsed note (dict or object with attributes).
    retriever_weight : Optional[float]
        Optional override; if None, value is read from frontmatter.
    vault_root : Optional[str]
        Optional base path to compute relative 'path' if possible.
    **kwargs :
        Ignored extra options to remain compatible with callers.

    Returns
    -------
    Dict[str, Any]
        Payload ready for Qdrant upsert.
    """
    fm = _get_frontmatter(note)

    # id / note_id
    note_id = _get_from_frontmatter(fm, "id", None) or _get(note, "note_id", None) or _get(note, "id", None)
    title = _get_from_frontmatter(fm, "title", None) or _get(note, "title", None)
    ntype = _get_from_frontmatter(fm, "type", None) or _get(note, "type", None)
    tags  = _coerce_tags(_get_from_frontmatter(fm, "tags", None) or _get(note, "tags", None))

    # Optional text for notes collection (only if present; we don't force it)
    text = _get(note, "text", None)
    if text is None and isinstance(note, dict):
        text = note.get("body") or note.get("content")

    # Path resolution
    path = _resolve_path(note, fm, vault_root)

    payload: Dict[str, Any] = {}
    if note_id is not None:
        payload["id"] = note_id       # keep for legacy queries
        payload["note_id"] = note_id  # canonical
    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