"""n8n — upgrade stage (D2): deploy the previous published version, write a data marker into the
persistent /home/node/.n8n volume, upgrade to current/$REF, assert health + data survival.

n8n state lives in the .n8n volume (sqlite + config); the marker is a file there, read back via
`exec_in_app` (not HTTP-served)."""
import os
import sys

import pytest

sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "..", "runner"))
from harness import lifecycle  # noqa: E402

MARKER = "/home/node/.n8n/ci-marker.txt"


@pytest.fixture
def old_app(recipe, app_domain, meta, request):
    prev = lifecycle.previous_version(recipe)
    if not prev:
        pytest.skip(f"{recipe}: no previous published version to upgrade from")
    lifecycle.janitor()
    request.addfinalizer(lambda: lifecycle.teardown_app(app_domain))
    lifecycle.deploy_app(recipe, app_domain, version=prev)
    lifecycle.wait_healthy(app_domain, ok_codes=tuple(meta["HEALTH_OK"]), path=meta["HEALTH_PATH"],
                           deploy_timeout=meta["DEPLOY_TIMEOUT"], http_timeout=meta["HTTP_TIMEOUT"])
    return app_domain, prev


def test_upgrade_preserves_data(old_app, meta):
    domain, prev = old_app
    lifecycle.exec_in_app(domain, ["sh", "-c", f"echo upgrade-survives > {MARKER}"])
    assert lifecycle.exec_in_app(domain, ["cat", MARKER]).strip() == "upgrade-survives"

    lifecycle.upgrade_app(domain, version=os.environ.get("VERSION") or None)
    lifecycle.wait_healthy(domain, ok_codes=tuple(meta["HEALTH_OK"]), path=meta["HEALTH_PATH"],
                           deploy_timeout=meta["DEPLOY_TIMEOUT"], http_timeout=meta["HTTP_TIMEOUT"])

    assert lifecycle.http_get(domain, meta["HEALTH_PATH"]) == 200
    assert lifecycle.exec_in_app(domain, ["cat", MARKER]).strip() == "upgrade-survives", \
        "data did not survive the upgrade"