from app.runner.api import create_runner_app
from app.runner.auth import TaskTokenIssuer, TaskTokenVerifier
from app.runner.ledger import InMemoryTaskLedger
from app.runner.nodes import NodeRegistry

NODE = {
    "id": "read_orders",
    "type": "sql.query",
    "data_source_uid": "01900000-0000-7000-8000-000000000010",
    "purpose": "read",
    "config": {"statement": "SELECT 1", "parameters": {}},
}

RULE_NODE = {
    "id": "apply_orders",
    "type": "rule.apply",
    "purpose": "write",
    "idempotency": {
        "strategy": "upsert",
        "key": "orders:2026-07-23",
    },
    "config": {
        "component_binding_id": "01900000-0000-7000-8000-000000000021",
        "rule_version_id": "01900000-0000-7000-8000-000000000022",
        "execution_plan_hash": "a" * 64,
    },
}


class Executor:
    def __init__(self):
        self.calls = 0
        self.context = None

    def execute(self, node, parameters, **kwargs):
        self.calls += 1
        self.context = kwargs
        return {
            "node": node["id"],
            "parameters": parameters,
            "output_artifact": "minio://dataops-rules/rules/output.parquet",
        }


def test_runner_accepts_one_signed_task_and_rejects_replay():
    issuer = TaskTokenIssuer("x" * 32, clock=lambda: 1_000)
    verifier = TaskTokenVerifier("x" * 32, clock=lambda: 1_000)
    executor = Executor()
    ledger = InMemoryTaskLedger()
    app = create_runner_app(
        verifier=verifier,
        ledger=ledger,
        registry=NodeRegistry({"sql.query": executor}),
    )
    token = issuer.issue(
        task_uid="01900000-0000-7000-8000-000000000011",
        dataflow_uid="01900000-0000-7000-8000-000000000012",
        deployment_id="01900000-0000-7000-8000-000000000014",
        environment="test",
        workflow_version=7,
        correlation_id="01900000-0000-7000-8000-000000000013",
        node=NODE,
    )
    payload = {"task_token": token, "node": NODE, "parameters": {"day": "today"}}

    with app.test_client() as client:
        first = client.post("/v1/tasks/execute", json=payload)
        replay = client.post("/v1/tasks/execute", json=payload)

    assert first.status_code == 200
    assert first.get_json()["result"]["node"] == "read_orders"
    assert first.get_json()["output_artifact"].startswith("minio://")
    assert executor.context["dataflow_uid"] == (
        "01900000-0000-7000-8000-000000000012"
    )
    assert executor.context["workflow_version"] == 7
    assert executor.context["node_id"] == "read_orders"
    assert replay.status_code == 409
    assert replay.get_json() == {"error": "task token already consumed"}
    assert executor.calls == 1


def test_runner_health_has_no_secret_or_datasource_details():
    app = create_runner_app(
        verifier=TaskTokenVerifier("x" * 32),
        ledger=InMemoryTaskLedger(),
        registry=NodeRegistry({}),
    )

    with app.test_client() as client:
        response = client.get("/health")

    assert response.status_code == 200
    assert response.get_json() == {"status": "ok"}


def test_runner_fails_closed_when_the_durable_ledger_is_unavailable():
    class UnavailableLedger:
        def claim(self, *_args, **_kwargs):
            raise RuntimeError("postgres password must never leak")

    issuer = TaskTokenIssuer("x" * 32, clock=lambda: 1_000)
    app = create_runner_app(
        verifier=TaskTokenVerifier("x" * 32, clock=lambda: 1_000),
        ledger=UnavailableLedger(),
        registry=NodeRegistry({"sql.query": Executor()}),
    )
    token = issuer.issue(
        task_uid="01900000-0000-7000-8000-000000000011",
        dataflow_uid="01900000-0000-7000-8000-000000000012",
        deployment_id="01900000-0000-7000-8000-000000000014",
        environment="test",
        workflow_version=7,
        correlation_id="01900000-0000-7000-8000-000000000013",
        node=NODE,
    )

    with app.test_client() as client:
        response = client.post(
            "/v1/tasks/execute",
            json={
                "task_token": token,
                "node": NODE,
                "parameters": {},
            },
        )

    assert response.status_code == 503
    assert response.get_json() == {"error": "task ledger is unavailable"}
    assert "password" not in response.get_data(as_text=True).lower()


def _rule_token(issuer):
    return issuer.issue(
        task_uid="01900000-0000-7000-8000-000000000031",
        dataflow_uid="01900000-0000-7000-8000-000000000032",
        deployment_id="01900000-0000-7000-8000-000000000033",
        environment="production",
        workflow_version=7,
        correlation_id="01900000-0000-7000-8000-000000000034",
        node=RULE_NODE,
        write_authorized=True,
    )


def test_governed_rule_same_jti_replays_durable_response_once():
    issuer = TaskTokenIssuer("x" * 32, clock=lambda: 1_000)
    executor = Executor()
    ledger = InMemoryTaskLedger()
    app = create_runner_app(
        verifier=TaskTokenVerifier("x" * 32, clock=lambda: 1_000),
        ledger=ledger,
        registry=NodeRegistry({"rule.apply": executor}),
    )
    payload = {
        "task_token": _rule_token(issuer),
        "node": RULE_NODE,
        "parameters": {},
    }

    with app.test_client() as client:
        first = client.post("/v1/tasks/execute", json=payload)
        replay = client.post("/v1/tasks/execute", json=payload)

    assert first.status_code == replay.status_code == 200
    assert first.get_json() == replay.get_json()
    assert replay.headers["X-Idempotent-Replay"] == "true"
    assert executor.calls == 1


def test_governed_rule_recovers_terminal_evidence_after_response_loss():
    class LostFirstFinishLedger(InMemoryTaskLedger):
        def __init__(self):
            super().__init__()
            self.finish_calls = 0

        def finish(self, jti, **outcome):
            self.finish_calls += 1
            if self.finish_calls == 1:
                return
            return super().finish(jti, **outcome)

    class RecoverableExecutor(Executor):
        def replay_task(self, **_context):
            return {
                "node": RULE_NODE["id"],
                "parameters": {},
                "rows_out": 9,
            }

    issuer = TaskTokenIssuer("x" * 32, clock=lambda: 1_000)
    executor = RecoverableExecutor()
    ledger = LostFirstFinishLedger()
    app = create_runner_app(
        verifier=TaskTokenVerifier("x" * 32, clock=lambda: 1_000),
        ledger=ledger,
        registry=NodeRegistry({"rule.apply": executor}),
    )
    payload = {
        "task_token": _rule_token(issuer),
        "node": RULE_NODE,
        "parameters": {},
    }

    with app.test_client() as client:
        first = client.post("/v1/tasks/execute", json=payload)
        recovered = client.post("/v1/tasks/execute", json=payload)
        replay = client.post("/v1/tasks/execute", json=payload)

    assert first.status_code == recovered.status_code == replay.status_code == 200
    assert recovered.get_json()["result"]["rows_out"] == 9
    assert replay.get_json() == recovered.get_json()
    assert executor.calls == 1


def test_running_rule_without_terminal_evidence_returns_retryable_202():
    class RunningExecutor(Executor):
        def replay_task(self, **_context):
            return None

    issuer = TaskTokenIssuer("x" * 32, clock=lambda: 1_000)
    executor = RunningExecutor()
    ledger = InMemoryTaskLedger()
    token = _rule_token(issuer)
    verifier = TaskTokenVerifier("x" * 32, clock=lambda: 1_000)
    claims = verifier.verify(token, node=RULE_NODE)
    ledger.claim(
        claims.jti,
        {
            "task_uid": claims.task_uid,
            "dataflow_uid": claims.dataflow_uid,
            "deployment_id": claims.deployment_id,
            "environment": claims.environment,
            "workflow_version": claims.workflow_version,
            "correlation_id": claims.correlation_id,
            "node_id": claims.node_id,
            "node_type": claims.node_type,
            "data_source_uid": None,
            "idempotency_key": RULE_NODE["idempotency"]["key"],
        },
        expires_at=claims.expires_at,
    )
    app = create_runner_app(
        verifier=verifier,
        ledger=ledger,
        registry=NodeRegistry({"rule.apply": executor}),
    )

    with app.test_client() as client:
        response = client.post(
            "/v1/tasks/execute",
            json={
                "task_token": token,
                "node": RULE_NODE,
                "parameters": {},
            },
        )

    assert response.status_code == 202
    assert response.headers["Retry-After"] == "2"
    assert executor.calls == 0


def test_running_ledger_without_rule_run_expires_to_unknown():
    class StaleLedger(InMemoryTaskLedger):
        def reconcile_running(self, jti, binding):
            record = self.get(jti)
            assert record.binding == binding
            record.status = "unknown"
            record.commit_outcome = "unknown"
            return record

    class MissingEvidenceExecutor(Executor):
        def replay_task(self, **_context):
            return {"state": "missing"}

    issuer = TaskTokenIssuer("x" * 32, clock=lambda: 1_000)
    verifier = TaskTokenVerifier("x" * 32, clock=lambda: 1_000)
    token = _rule_token(issuer)
    claims = verifier.verify(token, node=RULE_NODE)
    ledger = StaleLedger()
    binding = {
        "task_uid": claims.task_uid,
        "dataflow_uid": claims.dataflow_uid,
        "deployment_id": claims.deployment_id,
        "environment": claims.environment,
        "workflow_version": claims.workflow_version,
        "correlation_id": claims.correlation_id,
        "node_id": claims.node_id,
        "node_type": claims.node_type,
        "data_source_uid": None,
        "idempotency_key": RULE_NODE["idempotency"]["key"],
    }
    ledger.claim(claims.jti, binding, expires_at=claims.expires_at)
    app = create_runner_app(
        verifier=verifier,
        ledger=ledger,
        registry=NodeRegistry(
            {"rule.apply": MissingEvidenceExecutor()}
        ),
    )

    with app.test_client() as client:
        response = client.post(
            "/v1/tasks/execute",
            json={
                "task_token": token,
                "node": RULE_NODE,
                "parameters": {},
            },
        )

    assert response.status_code == 409
    assert response.get_json() == {
        "error": "task execution outcome is unknown"
    }
    assert ledger.get(claims.jti).status == "unknown"


def test_expired_rule_run_is_reconciled_and_ledger_finalized_unknown():
    class ExpiredEvidenceExecutor(Executor):
        def replay_task(self, **_context):
            return {
                "state": "terminal",
                "status": "unknown",
                "commit_outcome": "unknown",
            }

    issuer = TaskTokenIssuer("x" * 32, clock=lambda: 1_000)
    verifier = TaskTokenVerifier("x" * 32, clock=lambda: 1_000)
    token = _rule_token(issuer)
    claims = verifier.verify(token, node=RULE_NODE)
    ledger = InMemoryTaskLedger()
    ledger.claim(
        claims.jti,
        {
            "task_uid": claims.task_uid,
            "dataflow_uid": claims.dataflow_uid,
            "deployment_id": claims.deployment_id,
            "environment": claims.environment,
            "workflow_version": claims.workflow_version,
            "correlation_id": claims.correlation_id,
            "node_id": claims.node_id,
            "node_type": claims.node_type,
            "data_source_uid": None,
            "idempotency_key": RULE_NODE["idempotency"]["key"],
        },
        expires_at=claims.expires_at,
    )
    app = create_runner_app(
        verifier=verifier,
        ledger=ledger,
        registry=NodeRegistry(
            {"rule.apply": ExpiredEvidenceExecutor()}
        ),
    )

    with app.test_client() as client:
        response = client.post(
            "/v1/tasks/execute",
            json={
                "task_token": token,
                "node": RULE_NODE,
                "parameters": {},
            },
        )

    assert response.status_code == 409
    assert ledger.get(claims.jti).status == "unknown"


def test_expired_token_is_replay_only_and_never_starts_execution():
    now = [1_000]
    issuer = TaskTokenIssuer(
        "x" * 32,
        clock=lambda: now[0],
        ttl_seconds=10,
    )
    verifier = TaskTokenVerifier("x" * 32, clock=lambda: now[0])
    token = _rule_token(issuer)
    ledger = InMemoryTaskLedger()
    executor = Executor()
    app = create_runner_app(
        verifier=verifier,
        ledger=ledger,
        registry=NodeRegistry({"rule.apply": executor}),
    )
    payload = {
        "task_token": token,
        "node": RULE_NODE,
        "parameters": {},
    }
    with app.test_client() as client:
        first = client.post("/v1/tasks/execute", json=payload)
        now[0] = 1_011
        replay = client.post("/v1/tasks/execute", json=payload)

    assert first.status_code == replay.status_code == 200
    assert replay.headers["X-Idempotent-Replay"] == "true"
    assert executor.calls == 1

    fresh_token = _rule_token(issuer)
    now[0] = 1_022
    with app.test_client() as client:
        rejected = client.post(
            "/v1/tasks/execute",
            json={
                "task_token": fresh_token,
                "node": RULE_NODE,
                "parameters": {},
            },
        )
    assert rejected.status_code == 401
    assert executor.calls == 1

    now[0] = 1_030
    running_token = _rule_token(issuer)
    running_claims = verifier.verify(
        running_token,
        node=RULE_NODE,
    )
    ledger.claim(
        running_claims.jti,
        {
            "task_uid": running_claims.task_uid,
            "dataflow_uid": running_claims.dataflow_uid,
            "deployment_id": running_claims.deployment_id,
            "environment": running_claims.environment,
            "workflow_version": running_claims.workflow_version,
            "correlation_id": running_claims.correlation_id,
            "node_id": running_claims.node_id,
            "node_type": running_claims.node_type,
            "data_source_uid": None,
            "idempotency_key": RULE_NODE["idempotency"]["key"],
        },
        expires_at=running_claims.expires_at,
    )
    now[0] = 1_041
    header, body, signature = running_token.split(".")
    changed_signature = (
        ("A" if signature[0] != "A" else "B") + signature[1:]
    )
    with app.test_client() as client:
        running = client.post(
            "/v1/tasks/execute",
            json={
                "task_token": running_token,
                "node": RULE_NODE,
                "parameters": {},
            },
        )
        tampered = client.post(
            "/v1/tasks/execute",
            json={
                "task_token": ".".join(
                    (header, body, changed_signature)
                ),
                "node": RULE_NODE,
                "parameters": {},
            },
        )
    assert running.status_code == 401
    assert running.get_json() == {
        "error": "expired task is not replayable"
    }
    assert tampered.status_code == 401
    assert executor.calls == 1