"""Fake-E2E: kompletter Generierungspfad in Sekunden. Thema (Web-Recherche) und
Uni (Dateien), plus Resume-Idempotenz."""

import asyncio
import itertools

import db
import guide
import korpus
import pipeline
from conftest import topic_anlegen
from fake_agents import FAKE_TEXT


async def _lauf_komplett(topic):
    run_id = pipeline.lauf_starten(topic)
    await pipeline._laeufe[topic]
    return run_id


def _pruefe_endzustand(topic, run_id):
    assert db.one("SELECT status FROM topics WHERE name=?", (topic,))["status"] == "fertig"
    run = db.one("SELECT * FROM runs WHERE id=?", (run_id,))
    assert run["status"] == "done"
    offen = db.query("SELECT * FROM befunde WHERE run_id=? AND status='offen'", (run_id,))
    assert offen == [], f"offene Befunde: {offen}"
    atome = db.query("SELECT * FROM atome WHERE topic=? AND status NOT IN"
                     " ('gemerged','verworfen')", (topic,))
    assert len(atome) == 3  # die Fake-Welt hat exakt drei Atome
    assert all(a["soll_id"] and a["ziel_id"] and a["baustein_id"] for a in atome)
    for a in atome:
        assert db.one("SELECT id FROM anker WHERE atom_id=?", (a["id"],))
        karten = db.query("SELECT * FROM artefakte WHERE atom_id=? AND typ='flashcard'"
                          " AND status='verifiziert'", (a["id"],))
        assert karten
    md = guide.guide_markdown(topic)
    for a in atome:
        assert f"<!-- atom: {a['id']} |" in md
    # Kapitel-Struktur: H2 = Kapitel (Struktur-Ebene, mit Intro), H3 = Baustein
    assert "\n## " in "\n" + md and "### " in md
    assert "**Kernpunkte:**" in md and "**Prüfe dich:**" in md
    kaps = db.query("SELECT * FROM kapitel WHERE topic=? ORDER BY ord", (topic,))
    assert kaps, "keine Kapitel gebildet"
    for k in kaps:
        assert k["intro"], f"Kapitel-Intro fehlt: {k['titel']}"
    bausteine = db.query("SELECT * FROM bausteine WHERE topic=? ORDER BY ord", (topic,))
    assert all(b["kapitel_id"] for b in bausteine)
    folge = [b["kapitel_id"] for b in bausteine]
    segmente = [k for k, _ in itertools.groupby(folge)]
    assert len(segmente) == len(set(segmente)) == len(kaps)  # kontiguierlich, lückenlos
    for b in db.query("SELECT titel FROM bausteine WHERE topic=?", (topic,)):
        assert not b["titel"].startswith("Kann"), b["titel"]  # Kurztitel, kein Ziel-Satz
    events = db.query("SELECT * FROM events WHERE run_id=?", (run_id,))
    assert events and all(e["template_hash"] for e in events if e["template"])


async def test_e2e_thema():
    topic = topic_anlegen("fake-thema", art="thema")
    run_id = await _lauf_komplett(topic)
    _pruefe_endzustand(topic, run_id)
    # zwei kleine Ziele → Merge über Soll-Grenzen (Entkopplung): EIN Baustein
    bausteine = db.query("SELECT * FROM bausteine WHERE topic=? ORDER BY ord", (topic,))
    assert len(bausteine) == 1


async def test_e2e_uni(tmp_path):
    ordner = korpus.TOPICS_DIR / "fake-uni"
    ordner.mkdir(parents=True)
    (ordner / "skript.txt").write_text(FAKE_TEXT, encoding="utf-8")
    (ordner / "uebung.txt").write_text(FAKE_TEXT + "\nSerie 1.\n", encoding="utf-8")
    topic = topic_anlegen("fake-uni", art="uni")
    run_id = await _lauf_komplett(topic)
    _pruefe_endzustand(topic, run_id)
    quellen = db.query("SELECT * FROM quellen WHERE topic=?", (topic,))
    assert len(quellen) == 2 and all(q["art"] == "datei" for q in quellen)
    rollen = {q["titel"]: q["rolle"] for q in quellen}
    assert rollen["skript.txt"] == "stoff" and rollen["uebung.txt"] == "aufgaben"


async def test_voll_reset_extrahiert_neu():
    topic = topic_anlegen("fake-vollreset", art="thema")
    run1 = await _lauf_komplett(topic)
    _pruefe_endzustand(topic, run1)
    pipeline.voll_reset(topic)
    assert db.query("SELECT * FROM atome WHERE topic=?", (topic,)) == []
    assert db.query("SELECT * FROM artefakte WHERE atom_id IN"
                    " (SELECT id FROM atome WHERE topic=?)", (topic,)) == []
    run2 = await _lauf_komplett(topic)
    _pruefe_endzustand(topic, run2)  # kompletter Neuaufbau inkl. neuer Atome


async def test_soll_reset_kein_doppel():
    topic = topic_anlegen("fake-reset", art="thema")
    run1 = await _lauf_komplett(topic)
    _pruefe_endzustand(topic, run1)
    atome_vorher = {a["id"] for a in db.query(
        "SELECT id FROM atome WHERE topic=? AND status NOT IN ('gemerged','verworfen')", (topic,))}

    pipeline.soll_reset(topic)
    assert db.query("SELECT * FROM soll WHERE topic=?", (topic,)) == []
    run2 = await _lauf_komplett(topic)
    _pruefe_endzustand(topic, run2)
    atome_nachher = {a["id"] for a in db.query(
        "SELECT id FROM atome WHERE topic=? AND status NOT IN ('gemerged','verworfen')", (topic,))}
    assert atome_nachher == atome_vorher  # Extraktions-Guard: keine Doppel-Atome


async def test_auto_stopp_und_fortsetzen():
    topic = topic_anlegen("fake-auto", art="thema")
    db.update("topics", "name", topic, auto=db.j({"inventar": False}))
    run1 = await _lauf_komplett(topic)
    assert db.one("SELECT status FROM topics WHERE name=?", (topic,))["status"] == "inventar_fertig"
    r = db.one("SELECT * FROM runs WHERE id=?", (run1,))
    assert r["status"] == "done" and "Auto-Stopp" in r["grund"]
    db.update("topics", "name", topic, auto=db.j({}))  # Auto wieder an → durchlaufen
    run2 = await _lauf_komplett(topic)
    _pruefe_endzustand(topic, run2)


async def test_ebenen_entfernen_kaskade():
    topic = topic_anlegen("fake-entfernen", art="thema")
    run1 = await _lauf_komplett(topic)
    _pruefe_endzustand(topic, run1)
    atome_vorher = {a["id"] for a in db.query(
        "SELECT id FROM atome WHERE topic=? AND status NOT IN ('gemerged','verworfen')", (topic,))}
    pipeline.ebenen_entfernen(topic, "struktur")
    assert db.query("SELECT * FROM bausteine WHERE topic=?", (topic,)) == []
    assert db.query("SELECT * FROM kapitel WHERE topic=?", (topic,)) == []
    assert db.query("SELECT * FROM lernziele WHERE topic=?", (topic,)) == []
    assert db.one("SELECT status FROM topics WHERE name=?", (topic,))["status"] == "artefakte_fertig"
    # Anzeige-Reset: Token-Zählung der entfernten Ebenen beginnt neu (Events bleiben)
    resets = db.uj(db.one("SELECT resets FROM topics WHERE name=?", (topic,))["resets"], {})
    assert set(resets) == {"struktur", "guide"}
    assert resets["struktur"] == db.one("SELECT MAX(id) AS m FROM events")["m"]
    run2 = await _lauf_komplett(topic)
    _pruefe_endzustand(topic, run2)
    atome_nachher = {a["id"] for a in db.query(
        "SELECT id FROM atome WHERE topic=? AND status NOT IN ('gemerged','verworfen')", (topic,))}
    assert atome_nachher == atome_vorher  # Atome blieben erhalten


async def test_topic_loeschen():
    topic = topic_anlegen("fake-weg", art="thema")
    run1 = await _lauf_komplett(topic)
    _pruefe_endzustand(topic, run1)
    pipeline.topic_loeschen(topic)
    for tabelle in ("topics", "quellen", "soll", "atome", "lernziele", "bausteine",
                    "kapitel", "runs"):
        feld = "name" if tabelle == "topics" else "topic"
        assert db.query(f"SELECT * FROM {tabelle} WHERE {feld}=?", (topic,)) == [], tabelle


async def test_resume_idempotent():
    topic = topic_anlegen("fake-resume", art="thema")
    run1 = await _lauf_komplett(topic)
    _pruefe_endzustand(topic, run1)
    atome_vorher = {a["id"] for a in db.query(
        "SELECT id FROM atome WHERE topic=? AND status NOT IN ('gemerged','verworfen')", (topic,))}
    calls_vorher = len(db.query("SELECT id FROM events", ()))

    run2 = pipeline.lauf_starten(topic)  # zweiter Lauf auf fertigem Topic
    await pipeline._laeufe[topic]
    assert db.one("SELECT status FROM runs WHERE id=?", (run2,))["status"] == "done"
    atome_nachher = {a["id"] for a in db.query(
        "SELECT id FROM atome WHERE topic=? AND status NOT IN ('gemerged','verworfen')", (topic,))}
    assert atome_nachher == atome_vorher  # nichts dupliziert
    assert len(db.query("SELECT id FROM events", ())) == calls_vorher  # keine neuen LLM-Calls