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"""Worker endpoint tests (spec §3.3) — POST /api/v1/smtp/probe*.

Uses FastAPI TestClient against the real router so auth open-prefix handling
and the X-Worker-Token guard are exercised end-to-end.
"""
import unittest
from unittest.mock import AsyncMock, patch

from fastapi.testclient import TestClient

from app.config import settings
from app.main import app
from app.models import SMTPResult


def _client():
    return TestClient(app)


class WorkerEndpointTests(unittest.TestCase):
    def setUp(self):
        self.probe_payload = {"email": "a@corp.test", "mx_host": "mx.corp.test"}

    def test_mailbox_probe_returns_smtp_result(self):
        with patch(
            "app.validator.mailbox_provider.AutonomousSmtpProvider.verify",
            new=AsyncMock(return_value=SMTPResult(verified=True, smtp_code=250)),
        ):
            with _client() as client:
                res = client.post("/api/v1/smtp/probe", json=self.probe_payload)
        self.assertEqual(res.status_code, 200)
        body = res.json()
        self.assertTrue(body["verified"])
        self.assertEqual(body["smtp_code"], 250)

    def test_catch_all_probe_shape(self):
        with patch(
            "app.validator.mailbox_provider.AutonomousSmtpProvider.catch_all",
            new=AsyncMock(return_value=(True, 0.95)),
        ):
            with _client() as client:
                res = client.post(
                    "/api/v1/smtp/probe",
                    json={"domain": "corp.test", "mx_host": "mx.corp.test",
                          "probe": "catch_all"},
                )
        self.assertEqual(res.status_code, 200)
        self.assertEqual(res.json(), {"is_catch_all": True, "confidence": 0.95})

    def test_batch_probe_roundtrip(self):
        with patch(
            "app.validator.mailbox_provider.AutonomousSmtpProvider.verify_many",
            new=AsyncMock(return_value=(
                {"a@corp.test": SMTPResult(verified=True, smtp_code=250)},
                {"corp.test": False},
            )),
        ):
            with _client() as client:
                res = client.post(
                    "/api/v1/smtp/probe/batch",
                    json={"pairs": [["a@corp.test", "mx.corp.test"]]},
                )
        self.assertEqual(res.status_code, 200)
        body = res.json()
        self.assertTrue(body["results"]["a@corp.test"]["verified"])
        self.assertEqual(body["catch_all"], {"corp.test": False})

    def test_token_guard_rejects_bad_token(self):
        with patch.object(settings, "smtp_worker_token", "s3cret"):
            with _client() as client:
                res = client.post("/api/v1/smtp/probe", json=self.probe_payload)
        self.assertEqual(res.status_code, 401)

    def test_token_guard_accepts_good_token(self):
        with patch.object(settings, "smtp_worker_token", "s3cret"), patch(
            "app.validator.mailbox_provider.AutonomousSmtpProvider.verify",
            new=AsyncMock(return_value=SMTPResult(verified=True, smtp_code=250)),
        ):
            with _client() as client:
                res = client.post(
                    "/api/v1/smtp/probe",
                    json=self.probe_payload,
                    headers={"X-Worker-Token": "s3cret"},
                )
        self.assertEqual(res.status_code, 200)

    def test_probe_requires_email_or_domain(self):
        with _client() as client:
            res = client.post("/api/v1/smtp/probe", json={"mx_host": "mx.corp.test"})
        self.assertEqual(res.status_code, 422)


class OpsEndpointTests(unittest.TestCase):
    def test_engine_status_shape(self):
        with _client() as client:
            res = client.get("/api/v1/engine/status")
        self.assertEqual(res.status_code, 200)
        body = res.json()
        self.assertEqual(body["version"], settings.app_version)
        self.assertIn("dns", body)
        self.assertIn("smtp", body)
        self.assertIn("ai_scorer", body)
        self.assertIn("egress_port25", body["smtp"])

    def test_inference_metrics_shape(self):
        with _client() as client:
            res = client.get("/api/v1/metrics/inference")
        self.assertEqual(res.status_code, 200)
        body = res.json()
        for key in ("verifications_scored", "inference_calls", "heuristic_calls",
                    "burn_rate", "burn_rate_target", "burn_rate_ok"):
            self.assertIn(key, body)

    def test_health_carries_workers_summary(self):
        with _client() as client:
            res = client.get("/api/v1/health")
        self.assertEqual(res.status_code, 200)
        body = res.json()
        self.assertIn("workers", body)
        self.assertIn("ai_scorer", body["workers"])
        self.assertEqual(body["version"], settings.app_version)


if __name__ == "__main__":
    unittest.main()