"""G2 -- the system is genuinely multi-service, not a collapsed monolith."""
import asyncio
import time

import httpx
import pytest

from harness import containers
from harness.config import HTTP_SERVICES, SERVICE_URLS
from harness.payloads import tx_payload

pytestmark = pytest.mark.contract


@pytest.mark.parametrize("service", HTTP_SERVICES)
async def test_service_healthz_reports_own_name(service):
    """G2: every HTTP service answers /healthz on its own port with its own name."""
    async with httpx.AsyncClient(timeout=5.0) as client:
        resp = await client.get(f"{SERVICE_URLS[service]}/healthz")
    assert resp.status_code == 200
    assert resp.json().get("service") == service


@pytest.mark.parametrize("service", HTTP_SERVICES)
async def test_service_readyz_ok(service):
    """G2: /readyz returns 200 for all six services when dependencies are healthy."""
    async with httpx.AsyncClient(timeout=5.0) as client:
        resp = await client.get(f"{SERVICE_URLS[service]}/readyz")
    assert resp.status_code == 200


async def test_health_all_reports_all_services_ok(api):
    """G2: GET /api/health/all reports all six services as ok."""
    resp = await api.get("/api/health/all")
    assert resp.status_code == 200
    services = resp.json()["services"]
    assert set(services) == set(HTTP_SERVICES)
    assert all(v == "ok" for v in services.values()), services


async def test_stopping_sanctions_breaks_transactions(api, manifest):
    """G2: stopping `sanctions` must make it report unhealthy within 15s and
    transactions must fail with 502/504, not 200 -- the test that catches a
    collapsed monolith (if transactions still succeed, sanctions isn't really
    in the path)."""
    containers.stop("sanctions")
    try:
        deadline = time.monotonic() + 15
        reported_unhealthy = False
        while time.monotonic() < deadline:
            resp = await api.get("/api/health/all")
            if resp.status_code == 200 and resp.json()["services"].get("sanctions") != "ok":
                reported_unhealthy = True
                break
            await asyncio.sleep(1)
        assert reported_unhealthy, "sanctions was not reported unhealthy within 15s of being stopped"

        resp = await api.post(
            "/api/transactions", json=tx_payload(manifest["clean_account_id"])
        )
        assert resp.status_code in (502, 504), (
            f"expected 502/504 with sanctions stopped, got {resp.status_code}: {resp.text}"
        )
    finally:
        containers.start("sanctions")
        containers.wait_ready("sanctions", timeout=30)


# ---------------------------------------------------------------------------
# G9 -- failure is contained: timeouts fire, the gateway doesn't wedge.
# ---------------------------------------------------------------------------

async def test_sanctions_errors_timeout_never_exceeds_10s(api, chaos, manifest, fresh_balances):
    """G9: with sanctions_errors on and retry_storm off, no request takes
    longer than 10s -- the 3s downstream timeout must actually fire."""
    account_id = manifest["clean_account_id"]
    fresh_balances(account_id)
    await chaos.set_profile("clean")
    await chaos.set_flag("sanctions_errors", True)

    for _ in range(20):
        t0 = time.monotonic()
        resp = await api.post("/api/transactions", json=tx_payload(account_id, amount_minor=100))
        elapsed = time.monotonic() - t0
        assert elapsed <= 10, f"request took {elapsed:.1f}s, expected <= 10s"
        assert resp.status_code in (201, 502, 504), resp.status_code


async def test_gateway_healthz_stays_fast_while_sanctions_is_down(api):
    """G9: with sanctions stopped entirely, the gateway still answers
    /healthz in under 1s throughout."""
    containers.stop("sanctions")
    try:
        deadline = time.monotonic() + 10
        while time.monotonic() < deadline:
            t0 = time.monotonic()
            resp = await api.get("/healthz")
            elapsed = time.monotonic() - t0
            assert resp.status_code == 200
            assert elapsed < 1, f"/healthz took {elapsed:.2f}s while sanctions was down"
            await asyncio.sleep(0.5)
    finally:
        containers.start("sanctions")
        containers.wait_ready("sanctions", timeout=30)


async def test_no_200_response_ever_has_a_null_transaction_id(api, chaos, manifest, fresh_balances):
    """G9: no request ever returns a 200/201 with a null transaction_id, even
    under combined chaos (nightmare profile)."""
    account_id = manifest["clean_account_id"]
    fresh_balances(account_id)
    await chaos.set_profile("nightmare")

    for _ in range(20):
        resp = await api.post("/api/transactions", json=tx_payload(account_id, amount_minor=100))
        if resp.status_code in (200, 201):
            body = resp.json()
            assert body.get("transaction_id") is not None, body