"""Tests für die KV-Varianten-Map (Odoo library_variant_id ↔ KB kv-kvt-IDs)."""
import json
from pathlib import Path

ROOT = Path(__file__).resolve().parents[1]


def load_map() -> dict:
    return json.loads(
        (ROOT / "tools" / "catalogs" / "kv_variant_map.json").read_text(encoding="utf-8")
    )


def load_kb_catalog() -> dict:
    return json.loads(
        (ROOT / "tools" / "catalogs" / "kv_catalog.json").read_text(encoding="utf-8")
    )


def test_map_structure_and_kb_id_integrity():
    kb = load_kb_catalog()
    kb_ids = {e["id"] for e in kb["entries"].values()}
    variant_map = load_map()

    variants = variant_map["variants"]
    assert variants, "Mapping muss Varianten enthalten"
    referenced = set()
    for vid, variant in variants.items():
        assert variant["variant_id"] == vid
        assert variant["docs"], f"leere Variante: {vid}"
        assert variant["confidence"] in ("matched", "low")
        for doc in variant["docs"]:
            assert {"kv_kvt_id", "slug", "doctype"} <= set(doc)
            referenced.add(doc["kv_kvt_id"])
    assert referenced <= kb_ids, "Mapping darf nur existierende KB-IDs führen"

    # Unmatched-Einträge sind ebenfalls echte KB-IDs und decken den Rest ab
    unmatched = variant_map["unmatched_kb_entries"]
    assert set(unmatched) <= kb_ids
    stats = variant_map["stats"]
    assert stats["n_kb_entries_covered"] + stats["n_kb_entries_unmatched"] == (
        stats["n_kb_entries_total"]
    )
    assert stats["n_variants"] == len(variants)


def test_odoo_seed_variants_are_covered():
    """Odoo-Seed-KVs (kv_seed.xml): SI-2203 Handwerk und Gewerbe,
    SI-2748 Metallgewerbe müssen KV- und Tabellendokumente führen."""
    variants = load_map()["variants"]
    seeds = {vid: variants.get(vid) for vid in ("SI-2203_de", "SI-2748_de")}
    assert seeds["SI-2203_de"] and seeds["SI-2203_de"]["confidence"] == "matched"
    assert seeds["SI-2748_de"] and seeds["SI-2748_de"]["confidence"] == "matched"

    slugs_2203 = {d["slug"] for d in seeds["SI-2203_de"]["docs"]}
    slugs_2748 = {d["slug"] for d in seeds["SI-2748_de"]["docs"]}
    assert "kollektivvertrag-gewerbe-handwerk-und-dienstleistung-2026" in slugs_2203
    assert "gehaltsordnung-gewerbe-handwerk-dienstleistung-2026" in slugs_2203
    assert "kollektivvertrag-abschluss-angestellte-metallgewerbe-2026" in slugs_2748
    assert "lohnordnung-metallgewerbe-arbeiter-2026" in slugs_2748


def test_doc_pairs_keep_slug_and_id_correspondence():
    kb = load_kb_catalog()
    by_id = {e["id"]: e for e in kb["entries"].values()}
    variant_map = load_map()
    checked = 0
    for variant in variant_map["variants"].values():
        for doc in variant["docs"]:
            entry = by_id[doc["kv_kvt_id"]]
            url_slug = entry["url"].rstrip("/").rsplit("/", 1)[-1]
            assert url_slug == doc["slug"], (
                f"{doc['kv_kvt_id']}: {url_slug} != {doc['slug']}"
            )
            checked += 1
    assert checked >= 400