"""Tests für app/abgeordnetenwatch.py und die DB-Funktionen (#106 Phase 1)."""

from __future__ import annotations

import asyncio
import json
import sys
import types

import pytest


# ─── aiosqlite-Stub-Schutz (analog test_database.py) ────────────────────────
_aio = sys.modules.get("aiosqlite")
if _aio is not None and not hasattr(_aio, "connect"):
    del sys.modules["aiosqlite"]

import aiosqlite as _real_aiosqlite  # noqa: E402
import importlib as _importlib

for _mod in ("app.database", "app.abgeordnetenwatch"):
    if _mod in sys.modules:
        _db_mod = sys.modules[_mod]
        if _mod == "app.database" and not hasattr(
            getattr(_db_mod, "aiosqlite", None), "connect"
        ):
            del sys.modules[_mod]
            _importlib.import_module(_mod)
    else:
        _importlib.import_module(_mod)


def run(coro):
    return asyncio.get_event_loop().run_until_complete(coro)


# ─── Fixtures ────────────────────────────────────────────────────────────────

@pytest.fixture()
def db_path(tmp_path, monkeypatch):
    path = tmp_path / "test_aw.db"
    from app.config import settings
    monkeypatch.setattr(settings, "db_path", str(path))
    return str(path)


@pytest.fixture()
def initialized_db(db_path):
    from app import database
    run(database.init_db())
    return db_path


# ─── extract_drucksache_from_intro ───────────────────────────────────────────

class TestExtractDrucksache:
    def test_simple_match(self):
        from app.abgeordnetenwatch import extract_drucksache_from_intro
        html = "<p>Beratung des Antrags 18/1234 der Fraktion SPD.</p>"
        assert extract_drucksache_from_intro(html) == "18/1234"

    def test_match_in_link(self):
        from app.abgeordnetenwatch import extract_drucksache_from_intro
        html = '<a href="...">Drucksache 7/98765</a>'
        assert extract_drucksache_from_intro(html) == "7/98765"

    def test_first_match_wins(self):
        from app.abgeordnetenwatch import extract_drucksache_from_intro
        html = "Antrag 17/100 und 18/200"
        assert extract_drucksache_from_intro(html) == "17/100"

    def test_no_match_returns_none(self):
        from app.abgeordnetenwatch import extract_drucksache_from_intro
        html = "<p>Kein Bezug auf eine Drucksache hier.</p>"
        assert extract_drucksache_from_intro(html) is None

    def test_empty_string_returns_none(self):
        from app.abgeordnetenwatch import extract_drucksache_from_intro
        assert extract_drucksache_from_intro("") is None

    def test_none_input_returns_none(self):
        from app.abgeordnetenwatch import extract_drucksache_from_intro
        assert extract_drucksache_from_intro(None) is None

    def test_too_short_sequence_not_matched(self):
        """Zwei Ziffern reichen nicht aus (min. 3 nach Slash)."""
        from app.abgeordnetenwatch import extract_drucksache_from_intro
        html = "Seite 3/12 — nicht relevant"
        assert extract_drucksache_from_intro(html) is None

    def test_rp_pattern_nr_wp_swap(self):
        """RP-URL '/538-18.pdf' → drucksache-Format 'wp/nr' = '18/538'.
        Wir vermeiden im HTML jegliche 'wp/nr'-Notation, sonst greift der
        generische 'Drucksache (\\d+)/(\\d+)'-Match zuerst."""
        from app.abgeordnetenwatch import extract_drucksache_from_intro
        html = '<a href="https://landtag.rlp.de/dokumente/538-18.pdf">Antrag</a>'
        result = extract_drucksache_from_intro(html)
        assert result == "18/538"

    def test_sn_pattern_dok_nr_leg_per_swap(self):
        """SN-URL 'dok_nr=2150&...&leg_per=8' → '8/2150'."""
        from app.abgeordnetenwatch import extract_drucksache_from_intro
        html = '<a href="/cgi-bin/foo?dok_nr=2150&extra=x&leg_per=8">DS</a>'
        assert extract_drucksache_from_intro(html) == "8/2150"

    def test_two_digit_wp_number(self):
        from app.abgeordnetenwatch import extract_drucksache_from_intro
        html = "Bezug: 19/12345"
        assert extract_drucksache_from_intro(html) == "19/12345"


# ─── PARLIAMENT_ID-Mapping ────────────────────────────────────────────────────

class TestParliamentIdMapping:
    def test_bt_maps_to_5(self):
        from app.abgeordnetenwatch import PARLIAMENT_ID
        assert PARLIAMENT_ID["BT"] == 5

    def test_bund_alias_maps_to_5(self):
        from app.abgeordnetenwatch import PARLIAMENT_ID
        assert PARLIAMENT_ID["BUND"] == 5

    def test_nrw_maps_to_4(self):
        from app.abgeordnetenwatch import PARLIAMENT_ID
        assert PARLIAMENT_ID["NRW"] == 4

    def test_all_16_bundeslaender_plus_bt_present(self):
        from app.abgeordnetenwatch import PARLIAMENT_ID
        expected_codes = {
            "BT", "NRW", "BE", "HH", "BW", "RP", "LSA", "MV",
            "HB", "HE", "NI", "BY", "SL", "TH", "BB", "SN", "SH",
        }
        assert expected_codes <= set(PARLIAMENT_ID.keys())


# ─── fetch_polls — Stub-Test via httpx mock ───────────────────────────────────

class TestFetchPollsStub:
    def test_fetch_polls_parses_response(self, monkeypatch):
        """Stub-Test: httpx.AsyncClient.get gibt eine Fake-API-Antwort zurück."""
        import httpx
        from app import abgeordnetenwatch as aw_mod

        fake_polls = [
            {
                "id": 42,
                "label": "Testabstimmung 1",
                "field_poll_date": "2026-04-01",
                "field_accepted": True,
                "field_topics": [{"label": "Klimaschutz"}],
                "field_intro": "<p>Antrag 18/999 der Fraktion GRÜNE</p>",
                "field_legislature": {"label": "18. Wahlperiode"},
            }
        ]

        class FakeResponse:
            def raise_for_status(self): pass
            def json(self): return {"data": fake_polls}

        class FakeClient:
            async def __aenter__(self): return self
            async def __aexit__(self, *a): pass
            async def get(self, url, params=None): return FakeResponse()

        monkeypatch.setattr(httpx, "AsyncClient", lambda **kw: FakeClient())

        polls = run(aw_mod.fetch_polls("NRW", limit=10))
        assert len(polls) == 1
        assert polls[0]["id"] == 42
        assert polls[0]["drucksache"] == "18/999"
        assert polls[0]["field_accepted"] is True

    def test_fetch_polls_unknown_bundesland_raises(self):
        from app.abgeordnetenwatch import fetch_polls
        with pytest.raises(ValueError, match="Unbekannter BL-Code"):
            run(fetch_polls("XX"))

    def test_fetch_votes_parses_response(self, monkeypatch):
        """Stub-Test: Votes werden korrekt geparst."""
        import httpx
        from app import abgeordnetenwatch as aw_mod

        fake_votes = [
            {
                "mandate": {
                    "id": 101,
                    "label": "Erika Mustermann",
                    "party": {"label": "SPD"},
                },
                "vote": "yes",
            },
            {
                "mandate": {
                    "id": 102,
                    "label": "Max Muster",
                    "party": {"label": "CDU"},
                },
                "vote": "no",
            },
        ]

        class FakeResponse:
            def raise_for_status(self): pass
            def json(self): return {"data": fake_votes}

        class FakeClient:
            async def __aenter__(self): return self
            async def __aexit__(self, *a): pass
            async def get(self, url, params=None): return FakeResponse()

        monkeypatch.setattr(httpx, "AsyncClient", lambda **kw: FakeClient())

        votes = run(aw_mod.fetch_votes_for_poll(42))
        assert len(votes) == 2
        assert votes[0]["politician_id"] == 101
        assert votes[0]["vote"] == "yes"
        assert votes[0]["partei"] == "SPD"
        assert votes[1]["vote"] == "no"

    def test_fetch_votes_unknown_vote_value_becomes_no_show(self, monkeypatch):
        import httpx
        from app import abgeordnetenwatch as aw_mod

        fake_votes = [{"mandate": {"id": 1, "label": "X"}, "vote": "gibberish"}]

        class FakeResponse:
            def raise_for_status(self): pass
            def json(self): return {"data": fake_votes}

        class FakeClient:
            async def __aenter__(self): return self
            async def __aexit__(self, *a): pass
            async def get(self, url, params=None): return FakeResponse()

        monkeypatch.setattr(httpx, "AsyncClient", lambda **kw: FakeClient())

        votes = run(aw_mod.fetch_votes_for_poll(99))
        assert votes[0]["vote"] == "no_show"


# ─── DB-Upsert-Round-Trip ─────────────────────────────────────────────────────

class TestDbUpsertRoundTrip:
    def test_upsert_poll_new(self, initialized_db):
        from app import database
        is_new = run(database.upsert_aw_poll(
            poll_id=1001,
            parliament_id=4,
            bundesland="NRW",
            drucksache="18/500",
            titel="Test-Abstimmung",
            datum="2026-04-01",
            accepted=True,
            topics=["Klimaschutz"],
            legislature_label="18. Wahlperiode",
            synced_at="2026-04-20T10:00:00",
        ))
        assert is_new is True

    def test_upsert_poll_update_returns_false(self, initialized_db):
        from app import database
        run(database.upsert_aw_poll(
            poll_id=1002, parliament_id=4, bundesland="NRW",
            drucksache="18/501", titel="Alt", datum="2026-03-01",
            accepted=False, topics=[], legislature_label="",
            synced_at="2026-04-20T10:00:00",
        ))
        is_new = run(database.upsert_aw_poll(
            poll_id=1002, parliament_id=4, bundesland="NRW",
            drucksache="18/501", titel="Neu", datum="2026-03-01",
            accepted=True, topics=[], legislature_label="",
            synced_at="2026-04-20T11:00:00",
        ))
        assert is_new is False

    def test_upsert_vote_new(self, initialized_db):
        from app import database
        run(database.upsert_aw_poll(
            poll_id=2001, parliament_id=4, bundesland="NRW",
            drucksache=None, titel="V-Test", datum="2026-04-01",
            accepted=True, topics=[], legislature_label="",
            synced_at="2026-04-20T10:00:00",
        ))
        is_new = run(database.upsert_aw_vote(
            poll_id=2001, politician_id=999,
            politician_name="Test Politiker",
            partei="SPD",
            vote="yes",
        ))
        assert is_new is True

    def test_upsert_vote_update_returns_false(self, initialized_db):
        from app import database
        run(database.upsert_aw_poll(
            poll_id=2002, parliament_id=4, bundesland="NRW",
            drucksache=None, titel="V-Test2", datum="2026-04-01",
            accepted=True, topics=[], legislature_label="",
            synced_at="2026-04-20T10:00:00",
        ))
        run(database.upsert_aw_vote(2002, 888, "Name", "CDU", "no"))
        is_new = run(database.upsert_aw_vote(2002, 888, "Name", "CDU", "yes"))
        assert is_new is False

    def test_get_abstimmungsverhalten_returns_none_for_missing(self, initialized_db):
        from app import database
        result = run(database.get_abstimmungsverhalten("99/9999"))
        assert result is None

    def test_get_abstimmungsverhalten_aggregates(self, initialized_db):
        from app import database
        # Poll anlegen
        run(database.upsert_aw_poll(
            poll_id=3001, parliament_id=4, bundesland="NRW",
            drucksache="18/3001", titel="AggTest", datum="2026-04-10",
            accepted=True, topics=[], legislature_label="",
            synced_at="2026-04-20T10:00:00",
        ))
        # Votes: 2× SPD yes, 1× CDU no, 1× CDU abstain
        run(database.upsert_aw_vote(3001, 1, "A", "SPD", "yes"))
        run(database.upsert_aw_vote(3001, 2, "B", "SPD", "yes"))
        run(database.upsert_aw_vote(3001, 3, "C", "CDU", "no"))
        run(database.upsert_aw_vote(3001, 4, "D", "CDU", "abstain"))

        result = run(database.get_abstimmungsverhalten("18/3001"))
        assert result is not None
        assert result["accepted"] is True
        fraktionen = {f["partei"]: f for f in result["fraktionen"]}
        assert fraktionen["SPD"]["yes"] == 2
        assert fraktionen["CDU"]["no"] == 1
        assert fraktionen["CDU"]["abstain"] == 1

    def test_aw_tables_created_by_init_db(self, db_path):
        """init_db legt abgeordnetenwatch_polls und _votes an."""
        import aiosqlite
        from app import database
        run(database.init_db())

        async def check():
            async with aiosqlite.connect(db_path) as db:
                cur = await db.execute(
                    "SELECT name FROM sqlite_master WHERE type='table'"
                )
                return {r[0] for r in await cur.fetchall()}

        tables = run(check())
        assert "abgeordnetenwatch_polls" in tables
        assert "abgeordnetenwatch_votes" in tables


# ─── fallback_drucksache_by_date_title (#142 Phase 3) ────────────────────────

class TestFallbackDrucksacheByDateTitle:
    """Unit-Tests für den Datum+Titel-Fallback-Lookup gegen die Assessments-DB."""

    @pytest.fixture()
    def db_with_assessment(self, initialized_db):
        """DB mit einem vorbereiteten Assessment für den Fallback-Test."""
        from app import database
        run(database.upsert_assessment({
            "drucksache": "7/1234",
            "title": "Antrag zur Verbesserung des Nahverkehrs in MV",
            "bundesland": "MV",
            "datum": "2026-04-10",
            "fraktionen": ["SPD"],
            "gwoeScore": 7.0,
            "gwoeBegründung": "Test",
            "gwoeMatrix": [],
            "gwoeSchwerpunkt": [],
            "wahlprogrammScores": [],
            "verbesserungen": [],
            "stärken": [],
            "schwächen": [],
            "themen": [],
            "antragZusammenfassung": "",
            "antragKernpunkte": [],
            "source": "batch",
            "model": "test",
        }))
        return initialized_db

    def test_fallback_finds_match_within_14_days(self, db_with_assessment):
        from app.abgeordnetenwatch import fallback_drucksache_by_date_title
        result = run(fallback_drucksache_by_date_title(
            datum="2026-04-12",   # 2 Tage nach Assessment-Datum
            titel="Verbesserung des Nahverkehrs in MV",
            bundesland="MV",
        ))
        assert result == "7/1234"

    def test_fallback_returns_none_outside_14_days(self, db_with_assessment):
        from app.abgeordnetenwatch import fallback_drucksache_by_date_title
        result = run(fallback_drucksache_by_date_title(
            datum="2026-05-01",   # 21 Tage nach Assessment-Datum
            titel="Verbesserung des Nahverkehrs in MV",
            bundesland="MV",
        ))
        assert result is None

    def test_fallback_returns_none_wrong_bundesland(self, db_with_assessment):
        from app.abgeordnetenwatch import fallback_drucksache_by_date_title
        result = run(fallback_drucksache_by_date_title(
            datum="2026-04-10",
            titel="Verbesserung des Nahverkehrs in MV",
            bundesland="BY",   # falsches BL
        ))
        assert result is None

    def test_fallback_returns_none_no_titel_match(self, db_with_assessment):
        from app.abgeordnetenwatch import fallback_drucksache_by_date_title
        result = run(fallback_drucksache_by_date_title(
            datum="2026-04-10",
            titel="Irgendwas voellig anderes ohne Treffer",
            bundesland="MV",
        ))
        assert result is None

    def test_fallback_returns_none_for_missing_inputs(self, db_with_assessment):
        from app.abgeordnetenwatch import fallback_drucksache_by_date_title
        assert run(fallback_drucksache_by_date_title(None, "Titel", "MV")) is None
        assert run(fallback_drucksache_by_date_title("2026-04-10", None, "MV")) is None