"""Post-review services load from src; Emmaforo clamp contracts stay downgrade-only."""

from __future__ import annotations

from pathlib import Path

from backend.periscopex.models import Finding
from backend.services.billing_hook import NullBilling, get_billing
from backend.services.dedupe_findings import _build_deduped
from backend.services.normalize_findings import _build_normalized
import backend.services.billing_hook as billing_hook
import backend.services.dedupe_findings as dedupe_findings
import backend.services.normalize_findings as normalize_findings


def test_postpass_modules_are_src():
    for mod, name in (
        (normalize_findings, "normalize_findings.py"),
        (dedupe_findings, "dedupe_findings.py"),
        (billing_hook, "billing_hook.py"),
    ):
        path = Path(mod.__file__).resolve()
        assert path.name == name
        assert "src" in path.parts
        assert "Native Periscope overlay" not in path.read_text(encoding="utf-8")[:500]


def test_self_host_billing_is_null():
    hook = get_billing()
    assert isinstance(hook, NullBilling)
    assert hook.credits_for_api_cost(12.0) == 0.0


def test_emmaforo_uart_normalize_cannot_promote_warning():
    """U2-001 class: hedged UART abs-max must stay WARNING."""
    originals = [
        Finding(
            designator="U2",
            mpn="CH340E",
            finding="5V UART into MCU",
            why="Unverified: abs-max for PA14 not confirmed",
            status="WARNING",
            recommendation="level shift",
            source_page=11,
            source_quote="",
            reference="",
        )
    ]
    raw = [{
        "merged_from": [1],
        "finding": "CH340E 5V will damage the MCU",
        "why": "will damage the MCU",
        "status": "ERROR",
        "recommendation": "level shift",
        "change_rationale": "graded ERROR",
    }]
    built = _build_normalized(raw, [], originals)
    assert built is not None
    kept, _ = built
    assert kept[0].status == "WARNING"
    assert kept[0].why.lower().startswith("unverified:")


def test_emmaforo_uart_dedupe_collapses_both_endpoints():
    originals = [
        Finding(
            designator="U2", mpn="CH340E", finding="5V out on UART",
            why="w", status="ERROR", recommendation="", source_page=11,
            source_quote="q2", reference="r2",
        ),
        Finding(
            designator="U3", mpn="ESP32", finding="PA14 overvoltage",
            why="w", status="ERROR", recommendation="", source_page=25,
            source_quote="q3", reference="r3",
        ),
    ]
    groups = [{
        "member_indices": [1, 2],
        "primary_index": 2,
        "finding": "CH340E 5V into MCU UART pin",
        "why": "same UART interface",
        "status": "ERROR",
        "recommendation": "level shift",
        "change_rationale": "merged 1+2",
    }]
    built = _build_deduped(groups, originals)
    assert built is not None
    assert len(built) == 1
    assert built[0].designator == "U3"
    assert built[0].source_page == 25