FabledSteward/tests/mcp/test_automation.py

"""The automation tools' pure parts and their gates: check mode by default,
secrets kept out of what is stored, roles, and refusals that run nothing.

A real check-mode run, applied run and audit rows are covered against
Postgres in tests/integration/test_mcp_automation.py.
"""
from __future__ import annotations

import inspect
from types import SimpleNamespace as NS

import pytest

from steward.core.api_tokens import Caller
from steward.mcp.tools import automation
from steward.models.users import UserRole

VARS = [
    {"name": "api_token", "default": "abc", "secret": True, "required": False, "prompt": None},
    {"name": "greeting", "default": "hi", "secret": False, "required": False, "prompt": None},
    {"name": "release", "default": "", "secret": False, "required": True, "prompt": "Release?"},
]

VIEWER_TOOLS = {"list_playbooks", "get_playbook", "list_inventory", "list_ansible_runs",
                "get_ansible_run", "list_schedules", "wait_for_run"}
OPERATOR_TOOLS = {"run_playbook", "cancel_ansible_run", "create_schedule", "update_schedule",
                  "delete_schedule"}


def test_split_vars_keeps_secrets_apart_from_what_is_stored():
    plain, secret = automation.split_vars(VARS, {"api_token": "s3cr3t", "greeting": "yo",
                                                 "release": "1.2", "other": 5})
    assert plain == {"greeting": "yo", "release": "1.2", "other": 5}
    assert secret == {"api_token": "s3cr3t"}


def test_split_vars_refuses_a_missing_prompt_and_odd_values():
    with pytest.raises(ValueError, match="prompts for release.*Nothing was run"):
        automation.split_vars(VARS, {"greeting": "yo"})
    with pytest.raises(ValueError, match="string, number or boolean"):
        automation.split_vars(VARS[:2], {"greeting": ["a"]})


def test_public_variables_mask_secret_defaults():
    out = {v["name"]: v["default"] for v in automation.public_variables(VARS)}
    assert out == {"api_token": "<secret>", "greeting": "hi", "release": ""}


def test_build_params():
    assert automation.build_params({}, "", "", True) == {"check": True}
    assert automation.build_params({"a": 1}, " web01 ", "deploy", False) == {
        "extra_vars_map": {"a": 1}, "limit": "web01", "tags": "deploy"}


def test_writes_default_to_check_mode():
    for fn in (automation.run_playbook, automation.create_schedule, automation.set_alert_action):
        assert inspect.signature(fn).parameters["check"].default is True, fn.__name__


async def test_run_playbook_will_not_apply_a_confirm_playbook_unconfirmed(monkeypatch):
    monkeypatch.setattr(automation, "_source", lambda name: {"name": name, "path": "/x"})
    monkeypatch.setattr(automation, "_playbook",
                        lambda s, p: "# steward:confirm: true\n- hosts: all\n  tasks: []\n")

    def _no_run(*a, **k):
        raise AssertionError("a run was started")
    monkeypatch.setattr(automation, "trigger_run", _no_run)
    with pytest.raises(ValueError, match="flagged destructive.*confirmed=true"):
        await automation.run_playbook("s", "wipe.yml", check=False)


def test_recap_totals_sum_over_hosts():
    results = {"hosts": {"a": {"ok": 3, "changed": 1}, "b": {"ok": 2, "failed": 1}}}
    assert automation.recap_totals(results) == {
        "hosts": 2, "ok": 5, "changed": 1, "failed": 1, "unreachable": 0, "skipped": 0}
    assert automation.recap_totals(None) is None


def test_read_log_tail_and_grep(monkeypatch, tmp_path):
    monkeypatch.setattr(automation.executor, "artifact_path", lambda rid: str(tmp_path / "none.log"))
    run = NS(id="r1", output="\n".join(["PLAY [all]", "TASK [x]", "fatal: boom", "x" * 900, "PLAY RECAP"]))
    out = automation.read_log(run, tail=2, grep="FATAL")
    assert out["log_lines"] == 5
    assert out["tail"][1] == "PLAY RECAP" and out["tail"][0].endswith("[… 400 more]")
    assert out["matches"] == [{"line_no": 3, "line": "fatal: boom"}] and out["matches_total"] == 1
    (tmp_path / "r1.log").write_text("from the artifact\n")
    monkeypatch.setattr(automation.executor, "artifact_path", lambda rid: str(tmp_path / f"{rid}.log"))
    assert automation.read_log(run, tail=10, grep="")["tail"] == ["from the artifact"]


def test_automation_tools_are_registered_with_their_roles(app):
    mcp = app.mcp_server
    for name in VIEWER_TOOLS:
        assert mcp.tool_roles[name] is UserRole.viewer, name
        assert mcp._tool_manager.get_tool(name).annotations.read_only_hint is True, name
    for name in OPERATOR_TOOLS:
        assert mcp.tool_roles[name] is UserRole.operator, name
        assert mcp._tool_manager.get_tool(name).annotations.read_only_hint is False, name
    assert mcp.tool_roles["set_alert_action"] is UserRole.admin
    for name in VIEWER_TOOLS | OPERATOR_TOOLS | {"set_alert_action"}:
        assert (mcp._tool_manager.get_tool(name).description or "").strip(), name


def test_a_viewer_token_cannot_start_a_run(app):
    viewer = Caller(user_id="u", username="v", role=UserRole.viewer, token_id=1)
    operator = Caller(user_id="u", username="o", role=UserRole.operator, token_id=2)
    assert "needs the operator role" in app.mcp_server.refusal("run_playbook", viewer)
    assert app.mcp_server.refusal("run_playbook", operator) is None
    assert "needs the admin role" in app.mcp_server.refusal("set_alert_action", operator)


def test_builtin_playbooks_get_steward_url_from_steward():
    from steward.mcp import _context
    app = NS(config={"PUBLIC_BASE_URL": ""})
    a, u = _context._app_ctx.set(app), _context._base_url_ctx.set("http://steward.lan")
    try:
        declared = [{"name": "steward_url", "default": "", "secret": False, "required": False,
                     "prompt": None}]
        builtin = {"name": "steward-builtin"}
        got, filled = automation.steward_defaults(builtin, declared, {"agent_interval": 30})
        assert got == {"agent_interval": 30, "steward_url": "http://steward.lan"}
        assert filled == {"steward_url": "http://steward.lan"}
        # The configured public URL wins over the address the request came in on.
        app.config["PUBLIC_BASE_URL"] = "https://steward.example/"
        assert automation.steward_defaults(builtin, declared, {})[1] == {
            "steward_url": "https://steward.example"}
        # A value the caller passed stands; another source's playbook is untouched.
        assert automation.steward_defaults(builtin, declared, {"steward_url": "http://x"})[1] == {}
        assert automation.steward_defaults({"name": "homelab"}, declared, {}) == ({}, {})
        # A playbook that doesn't declare it gets nothing extra.
        assert automation.steward_defaults(builtin, [], {}) == ({}, {})
    finally:
        _context._app_ctx.reset(a)
        _context._base_url_ctx.reset(u)


async def test_run_playbook_holds_variables_to_the_callers_role(monkeypatch):
    monkeypatch.setattr(automation, "_source", lambda name: {"name": name, "path": "/x"})
    monkeypatch.setattr(automation, "_playbook", lambda s, p: "- hosts: all\n  tasks: []\n")

    def _no_run(*a, **k):
        raise AssertionError("a run was started")
    monkeypatch.setattr(automation, "trigger_run", _no_run)
    operator = Caller(user_id="u", username="op", role=UserRole.operator, token_id=1)
    monkeypatch.setattr(automation, "current_caller_or_none", lambda: operator)
    with pytest.raises(ValueError, match="Only an admin can set ansible_connection"):
        await automation.run_playbook("s", "site.yml", extra_vars={"ansible_connection": "local"})
    with pytest.raises(ValueError, match="Ansible evaluates it"):
        await automation.run_playbook("s", "site.yml", extra_vars={"x": "{{ lookup('pipe','id') }}"})


def test_schedule_update_holds_only_changed_variables(monkeypatch):
    operator = Caller(user_id="u", username="op", role=UserRole.operator, token_id=1)
    monkeypatch.setattr(automation, "current_caller_or_none", lambda: operator)
    stored = {"ansible_ssh_common_args": "-J bastion"}
    automation.check_caller_vars({**stored, "release": "2"}, stored)
    with pytest.raises(ValueError, match="Only an admin"):
        automation.check_caller_vars({"ansible_ssh_common_args": "-o ProxyCommand=x"}, stored)