from __future__ import annotations

import pytest

from src.services.agent_langgraph_adapter import (
    LANGGRAPH_CANDIDATE_ID,
    build_langgraph_candidate_result,
)


def test_langgraph_adapter_emits_candidate_result_contract():
    result = build_langgraph_candidate_result({
        "schema_version": "agent_replay_candidate_input_v1",
        "run_id": "run",
        "incident_id": "INC-1",
        "incident_context": {
            "severity": "P2",
            "alert_category": "host_resource",
            "alertname": "HostDiskUsageHigh",
            "affected_services": ["node-exporter-110"],
            "signals": [
                {
                    "labels": {"instance": "192.168.0.110"},
                    "annotations": {"summary": "disk usage high"},
                }
            ],
        },
        "source_metadata": {},
    }).to_dict()

    assert result["schema_version"] == "agent_candidate_replay_result_v1"
    assert result["candidate_id"] == LANGGRAPH_CANDIDATE_ID
    assert result["candidate_role"] == "durable_incident_workflow_kernel"
    assert result["incident_id"] == "INC-1"
    assert "SSH_DIAGNOSE" in result["proposed_action"]
    assert result["risk_level"] == "medium"
    assert result["requires_human_approval"] is True
    assert result["fallback_used"] is False
    assert result["trace_complete"] is True
    assert result["metadata"]["adapter_mode"] == "deterministic_offline_workflow_kernel"
    assert result["metadata"]["sdk_dependency"] == "langgraph_python_package_not_installed"


def test_langgraph_adapter_rejects_label_leak_before_execution():
    with pytest.raises(ValueError, match="evaluation label"):
        build_langgraph_candidate_result({
            "run_id": "run",
            "incident_id": "INC-1",
            "incident_context": {
                "verification_result": "success",
            },
            "source_metadata": {},
        })


def test_langgraph_adapter_preserves_resolved_incidents_as_no_action():
    result = build_langgraph_candidate_result({
        "schema_version": "agent_replay_candidate_input_v1",
        "run_id": "run",
        "incident_id": "INC-2",
        "incident_context": {
            "severity": "P3",
            "status": "resolved",
            "alert_category": "infrastructure",
            "alertname": "DockerContainerUnhealthy",
            "affected_services": ["cadvisor"],
        },
        "source_metadata": {},
    }).to_dict()

    assert result["proposed_action"].startswith("NO_ACTION:")
    assert result["blocked_by_policy"] is True
    assert result["trace_complete"] is True
    assert result["cost_usd"] == 0