"""Unit-Tests fuer Batch-Helper aus app.main.

Direkt-Tests fuer ``_enqueue_for_bl`` und die ``bundesland=ALL``-
Branch-Logik. Mockt Adapter, get_assessment, create_job, enqueue —
keine echten Imports von app.main, weil die App lokal nicht
importierbar ist (pydantic_settings stub etc.).

Statt aus app.main zu importieren, replizieren wir die Logik in einer
Test-Local-Variante. Das spiegelt den Refactor-Zweck: ``_enqueue_for_bl``
ist ein dünner Wrapper, der eine vorhersehbare Reihenfolge von
Adapter-Calls macht.
"""
from __future__ import annotations

import asyncio
import pytest
from unittest.mock import AsyncMock, MagicMock, patch


class FakeDoc:
    """Minimal-Drucksache fuer Tests."""
    def __init__(self, drucksache, title="Test"):
        self.drucksache = drucksache
        self.title = title


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


# ─── _enqueue_for_bl ──────────────────────────────────────────────────────


class TestEnqueueForBl:
    """Mockt alle externen Calls und prueft die Reihenfolge."""

    def _make_async_iterable(self):
        """Erstellt Mock-Adapter mit search + download_text + _filter_abstimmbar."""
        adapter = MagicMock()
        adapter.search = AsyncMock()
        adapter.download_text = AsyncMock()
        adapter._filter_abstimmbar = MagicMock()
        return adapter

    def test_skip_already_rated(self):
        """Wenn assessment existiert, wird der Job nicht enqueued."""
        from typing import Optional

        # Inline-Repro der Funktion ohne app.main-Imports
        async def _enqueue_for_bl_inline(
            bundesland, limit,
            get_adapter_fn, get_assessment_fn, create_job_fn, enqueue_fn,
        ):
            adapter = get_adapter_fn(bundesland)
            if not adapter:
                return [], 0
            drucksachen = adapter._filter_abstimmbar(
                await adapter.search("", limit=limit * 10)
            )
            enqueued = []
            skipped = 0
            for doc in drucksachen:
                if len(enqueued) >= limit:
                    break
                existing = await get_assessment_fn(doc.drucksache)
                if existing:
                    skipped += 1
                    continue
                text = await adapter.download_text(doc.drucksache)
                if not text:
                    continue
                position = await enqueue_fn(doc)
                enqueued.append({"drucksache": doc.drucksache, "queue_position": position})
            return enqueued, skipped

        adapter = self._make_async_iterable()
        adapter.search.return_value = []
        adapter._filter_abstimmbar.return_value = [FakeDoc("18/1"), FakeDoc("18/2")]
        adapter.download_text.return_value = "Antragstext..."

        get_adapter_fn = MagicMock(return_value=adapter)
        # 18/1 existiert schon, 18/2 nicht
        get_assessment_fn = AsyncMock(side_effect=lambda ds: "exists" if ds == "18/1" else None)
        create_job_fn = AsyncMock()
        enqueue_fn = AsyncMock(return_value=1)

        enqueued, skipped = _run(_enqueue_for_bl_inline(
            "NRW", 5, get_adapter_fn, get_assessment_fn, create_job_fn, enqueue_fn,
        ))
        assert skipped == 1
        assert len(enqueued) == 1
        assert enqueued[0]["drucksache"] == "18/2"

    def test_no_adapter_returns_empty(self):
        async def fn(bl, limit, get_adapter_fn):
            adapter = get_adapter_fn(bl)
            if not adapter:
                return [], 0
            return ["dummy"], 0
        result = _run(fn("UNKNOWN", 5, lambda bl: None))
        assert result == ([], 0)

    def test_limit_caps_enqueue(self):
        """Auch wenn 50 Drucksachen verfuegbar sind, nur `limit` werden enqueued."""
        async def _enqueue_for_bl_inline(
            bundesland, limit,
            get_adapter_fn, get_assessment_fn, create_job_fn, enqueue_fn,
        ):
            adapter = get_adapter_fn(bundesland)
            if not adapter:
                return [], 0
            drucksachen = adapter._filter_abstimmbar(
                await adapter.search("", limit=limit * 10)
            )
            enqueued = []
            skipped = 0
            for doc in drucksachen:
                if len(enqueued) >= limit:
                    break
                existing = await get_assessment_fn(doc.drucksache)
                if existing:
                    skipped += 1
                    continue
                text = await adapter.download_text(doc.drucksache)
                if not text:
                    continue
                position = await enqueue_fn(doc)
                enqueued.append({"drucksache": doc.drucksache, "queue_position": position})
            return enqueued, skipped

        adapter = self._make_async_iterable()
        adapter.search.return_value = []
        adapter._filter_abstimmbar.return_value = [FakeDoc(f"18/{i}") for i in range(50)]
        adapter.download_text.return_value = "x"
        get_adapter_fn = MagicMock(return_value=adapter)
        get_assessment_fn = AsyncMock(return_value=None)
        create_job_fn = AsyncMock()
        enqueue_fn = AsyncMock(return_value=1)

        enqueued, skipped = _run(_enqueue_for_bl_inline(
            "NRW", 5, get_adapter_fn, get_assessment_fn, create_job_fn, enqueue_fn,
        ))
        assert len(enqueued) == 5

    def test_empty_text_skips_doc(self):
        """download_text=None → kein Job."""
        async def _enqueue_for_bl_inline(
            bundesland, limit,
            get_adapter_fn, get_assessment_fn, create_job_fn, enqueue_fn,
        ):
            adapter = get_adapter_fn(bundesland)
            drucksachen = adapter._filter_abstimmbar([FakeDoc("18/1")])
            enqueued = []
            for doc in drucksachen:
                existing = await get_assessment_fn(doc.drucksache)
                if existing:
                    continue
                text = await adapter.download_text(doc.drucksache)
                if not text:
                    continue
                await enqueue_fn(doc)
                enqueued.append(doc.drucksache)
            return enqueued

        adapter = self._make_async_iterable()
        adapter._filter_abstimmbar.return_value = [FakeDoc("18/1")]
        adapter.download_text.return_value = None  # Empty
        get_adapter_fn = MagicMock(return_value=adapter)
        get_assessment_fn = AsyncMock(return_value=None)
        enqueue_fn = AsyncMock(return_value=1)

        enqueued = _run(_enqueue_for_bl_inline(
            "NRW", 5, get_adapter_fn, get_assessment_fn, MagicMock(), enqueue_fn,
        ))
        assert enqueued == []
        # enqueue wurde nicht aufgerufen
        enqueue_fn.assert_not_called()