"""Testy resolve_regulation_for_program."""
import pytest

from core.search.regulation_snapshot import regulation_snapshot_store
from core.regulation.regulation_resolver import (
    RegulationResolveResult,
    resolve_regulation_for_program,
    apply_regulation_context,
)


@pytest.fixture(autouse=True)
def _isolate_snapshot_store(monkeypatch):
    """Izolowany store in-memory na czas testu."""
    from core.search import regulation_snapshot as rs_mod

    fresh = rs_mod.RegulationSnapshotStore()
    monkeypatch.setattr(rs_mod, "regulation_snapshot_store", fresh)
    monkeypatch.setattr(
        "core.regulation.regulation_resolver.regulation_snapshot_store",
        fresh,
        raising=False,
    )
    yield fresh


@pytest.mark.asyncio
async def test_resolve_from_existing_snapshot(_isolate_snapshot_store):
    store = _isolate_snapshot_store
    snap = store.create_snapshot(
        program="PARP",
        raw_text="Rozdział 1. Opis przedsięwzięcia\nZałącznik 1. Kosztorys inwestycji",
        source_url="https://example.com/reg",
    )
    result = await resolve_regulation_for_program("PARP", program_type="PARP")
    assert result.snapshot_id == snap.id
    assert result.source == "snapshot"
    assert result.snapshot_backed is True
    assert not result.needs_user_url


@pytest.mark.asyncio
async def test_resolve_fallback_knowledge_base():
    result = await resolve_regulation_for_program("Program PARP wsparcie MŚP", program_type="PARP")
    assert result.source in ("knowledge_base", "snapshot", "heuristic")
    assert len(result.required_sections) > 0 or len(result.key_rules) > 0
    assert result.needs_user_url is False


@pytest.mark.asyncio
async def test_resolve_needs_user_url_for_unknown_program(monkeypatch):
    async def _no_fetch(url):
        return ""

    monkeypatch.setattr(
        "core.regulation.regulation_resolver._fetch_regulation_text",
        _no_fetch,
    )
    result = await resolve_regulation_for_program("NIEPOWIADANY_PROGRAM_XYZ_123", program_type="UNKNOWN")
    assert result.needs_user_url is True
    assert result.source == "none"


@pytest.mark.asyncio
async def test_resolve_fetch_url_creates_snapshot(monkeypatch):
    sample = "Sekcja 1. Opis projektu\nPunkt 2. Budżet i harmonogram\n" * 20

    async def _mock_fetch(url):
        return sample

    monkeypatch.setattr(
        "core.regulation.regulation_resolver._fetch_regulation_text",
        _mock_fetch,
    )
    result = await resolve_regulation_for_program(
        "TEST_FETCH",
        regulation_url="https://example.com/regulamin.pdf",
    )
    assert result.source == "url_fetch"
    assert result.snapshot_id
    assert result.regulation_url == "https://example.com/regulamin.pdf"


def test_apply_regulation_context():
    ext = apply_regulation_context(
        {"company_data": {"nip": "123"}},
        RegulationResolveResult(
            snapshot_id="snap-1",
            required_sections=["Opis projektu"],
            source="snapshot",
            regulation_url="https://x.pl/reg",
        ),
    )
    assert ext["regulation_snapshot_id"] == "snap-1"
    assert ext["required_sections"] == ["Opis projektu"]
    assert ext["regulation_pending"] is False
    assert ext["company_data"]["nip"] == "123"