"""Simulation workflow / state machine tests."""
from __future__ import annotations

from flask.testing import FlaskClient

from backend.tests.conftest import auth_headers as _h


def _make_engagement(client: FlaskClient, token: str) -> dict:
    resp = client.post(
        "/api/engagements",
        headers=_h(token),
        json={"name": "Op Gamma", "start_date": "2026-06-01"},
    )
    assert resp.status_code == 201
    return resp.get_json()


def _make_sim(client: FlaskClient, token: str, eid: int) -> dict:
    resp = client.post(
        f"/api/engagements/{eid}/simulations",
        headers=_h(token),
        json={"name": "Workflow Sim"},
    )
    assert resp.status_code == 201
    return resp.get_json()


def _transition(client: FlaskClient, token: str, sid: int, to: str):
    return client.post(
        f"/api/simulations/{sid}/transition",
        headers=_h(token),
        json={"to": to},
    )


# ---------------------------------------------------------------------------
# Valid transitions
# ---------------------------------------------------------------------------


def test_transition_to_review_required_from_pending(
    client: FlaskClient, redteam_token: str
) -> None:
    eng = _make_engagement(client, redteam_token)
    sim = _make_sim(client, redteam_token, eng["id"])
    assert sim["status"] == "pending"

    resp = _transition(client, redteam_token, sim["id"], "review_required")
    assert resp.status_code == 200
    assert resp.get_json()["status"] == "review_required"


def test_transition_to_review_required_from_in_progress(
    client: FlaskClient, redteam_token: str
) -> None:
    eng = _make_engagement(client, redteam_token)
    sim = _make_sim(client, redteam_token, eng["id"])
    # Auto-advance to in_progress
    client.patch(
        f"/api/simulations/{sim['id']}",
        headers=_h(redteam_token),
        json={"description": "started"},
    )

    resp = _transition(client, redteam_token, sim["id"], "review_required")
    assert resp.status_code == 200
    assert resp.get_json()["status"] == "review_required"


def test_transition_to_done_by_redteam(
    client: FlaskClient, redteam_token: str
) -> None:
    eng = _make_engagement(client, redteam_token)
    sim = _make_sim(client, redteam_token, eng["id"])
    _transition(client, redteam_token, sim["id"], "review_required")

    resp = _transition(client, redteam_token, sim["id"], "done")
    assert resp.status_code == 200
    assert resp.get_json()["status"] == "done"


def test_transition_to_done_by_soc(
    client: FlaskClient, redteam_token: str, soc_token: str
) -> None:
    eng = _make_engagement(client, redteam_token)
    sim = _make_sim(client, redteam_token, eng["id"])
    _transition(client, redteam_token, sim["id"], "review_required")

    resp = _transition(client, soc_token, sim["id"], "done")
    assert resp.status_code == 200
    assert resp.get_json()["status"] == "done"


def test_transition_to_done_by_admin(
    client: FlaskClient, admin_token: str
) -> None:
    eng = _make_engagement(client, admin_token)
    sim = _make_sim(client, admin_token, eng["id"])
    _transition(client, admin_token, sim["id"], "review_required")

    resp = _transition(client, admin_token, sim["id"], "done")
    assert resp.status_code == 200
    assert resp.get_json()["status"] == "done"


# ---------------------------------------------------------------------------
# Invalid transitions (AC-11.3)
# ---------------------------------------------------------------------------


def test_transition_done_from_pending_rejected(
    client: FlaskClient, redteam_token: str
) -> None:
    eng = _make_engagement(client, redteam_token)
    sim = _make_sim(client, redteam_token, eng["id"])

    resp = _transition(client, redteam_token, sim["id"], "done")
    assert resp.status_code == 409


def test_transition_to_pending_rejected(
    client: FlaskClient, redteam_token: str
) -> None:
    eng = _make_engagement(client, redteam_token)
    sim = _make_sim(client, redteam_token, eng["id"])
    _transition(client, redteam_token, sim["id"], "review_required")

    resp = _transition(client, redteam_token, sim["id"], "pending")
    assert resp.status_code == 409


def test_transition_to_in_progress_rejected(
    client: FlaskClient, redteam_token: str
) -> None:
    eng = _make_engagement(client, redteam_token)
    sim = _make_sim(client, redteam_token, eng["id"])

    resp = _transition(client, redteam_token, sim["id"], "in_progress")
    assert resp.status_code == 409


def test_transition_unknown_status_rejected(
    client: FlaskClient, redteam_token: str
) -> None:
    eng = _make_engagement(client, redteam_token)
    sim = _make_sim(client, redteam_token, eng["id"])

    resp = _transition(client, redteam_token, sim["id"], "nonexistent")
    assert resp.status_code == 409


def test_transition_review_required_from_done_is_reopen(
    client: FlaskClient, redteam_token: str
) -> None:
    """done → review_required is the Reopen path, now allowed (AC-18.2)."""
    eng = _make_engagement(client, redteam_token)
    sim = _make_sim(client, redteam_token, eng["id"])
    _transition(client, redteam_token, sim["id"], "review_required")
    _transition(client, redteam_token, sim["id"], "done")

    resp = _transition(client, redteam_token, sim["id"], "review_required")
    assert resp.status_code == 200
    assert resp.get_json()["status"] == "review_required"


# ---------------------------------------------------------------------------
# RBAC by role
# ---------------------------------------------------------------------------


def test_soc_cannot_transition_to_review_required(
    client: FlaskClient, redteam_token: str, soc_token: str
) -> None:
    eng = _make_engagement(client, redteam_token)
    sim = _make_sim(client, redteam_token, eng["id"])

    resp = _transition(client, soc_token, sim["id"], "review_required")
    assert resp.status_code == 403


def test_soc_cannot_transition_to_done_from_pending(
    client: FlaskClient, redteam_token: str, soc_token: str
) -> None:
    eng = _make_engagement(client, redteam_token)
    sim = _make_sim(client, redteam_token, eng["id"])

    resp = _transition(client, soc_token, sim["id"], "done")
    assert resp.status_code == 409


def test_transition_simulation_404(client: FlaskClient, redteam_token: str) -> None:
    resp = _transition(client, redteam_token, 9999, "review_required")
    assert resp.status_code == 404