#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Name:        app/core/qdrant_points.py
Version:     v1.2.0 (2025-09-05)

Kurzbeschreibung
  Qdrant-Points für Notes/Chunks/Edges.
  NEU: Edge-ID berücksichtigt optional 'occ' (Occurrence je Match):
       "{kind}:{src}->{tgt}#{seq}@{occ}"

Aufruf
  from app.core.qdrant_points import points_for_note, points_for_chunks, points_for_edges, upsert_batch

Changelog
  v1.2.0: Edge-ID mit '@occ' falls vorhanden.
"""

from __future__ import annotations
import uuid
from typing import List, Tuple
from qdrant_client.http import models as rest

def _names(prefix: str) -> Tuple[str, str, str]:
    return f"{prefix}_notes", f"{prefix}_chunks", f"{prefix}_edges"

def _to_uuid(stable_key: str) -> str:
    return str(uuid.uuid5(uuid.NAMESPACE_URL, stable_key))

def points_for_note(prefix: str, note_payload: dict, note_vec: List[float] | None, dim: int) -> Tuple[str, List[rest.PointStruct]]:
    notes_col, _, _ = _names(prefix)
    vector = note_vec if note_vec is not None else [0.0] * int(dim)
    raw_note_id = note_payload.get("note_id") or note_payload.get("id") or "missing-note-id"
    point_id = _to_uuid(raw_note_id)
    pt = rest.PointStruct(id=point_id, vector=vector, payload=note_payload)
    return notes_col, [pt]

def points_for_chunks(prefix: str, chunk_payloads: List[dict], vectors: List[List[float]]) -> Tuple[str, List[rest.PointStruct]]:
    _, chunks_col, _ = _names(prefix)
    points: List[rest.PointStruct] = []
    for i, (pl, vec) in enumerate(zip(chunk_payloads, vectors), start=1):
        chunk_id = pl.get("chunk_id") or pl.get("id")
        if not chunk_id:
            note_id = pl.get("note_id") or pl.get("parent_note_id") or "missing-note"
            chunk_id = f"{note_id}#{i}"
            pl["chunk_id"] = chunk_id
        point_id = _to_uuid(chunk_id)
        points.append(rest.PointStruct(id=point_id, vector=vec, payload=pl))
    return chunks_col, points

def points_for_edges(prefix: str, edge_payloads: List[dict]) -> Tuple[str, List[rest.PointStruct]]:
    """
    Edges-Collection mit 1D-Dummy-Vektor (keine Vektorsuche auf Edges).
    Stable-ID:
      Basis: "{kind}:{src}->{tgt}#{seq}"
      Neu:   Falls 'occ' vorhanden -> "{…}@{occ}"
    """
    _, _, edges_col = _names(prefix)
    points: List[rest.PointStruct] = []
    for pl in edge_payloads:
        edge_id = pl.get("edge_id")
        if not edge_id:
            kind = pl.get("kind", "edge")
            s = pl.get("source_id", "unknown-src")
            t = pl.get("target_id", "unknown-tgt")
            seq = pl.get("seq") or pl.get("order") or ""
            occ = pl.get("occ")
            base = f"{kind}:{s}->{t}#{seq}"
            edge_id = f"{base}@{occ}" if occ is not None else base
            pl["edge_id"] = edge_id
        point_id = _to_uuid(edge_id)
        points.append(rest.PointStruct(id=point_id, vector=[0.0], payload=pl))
    return edges_col, points

def upsert_batch(client, collection: str, points: List[rest.PointStruct]) -> None:
    if not points:
        return
    client.upsert(collection_name=collection, points=points, wait=True)