"""n8n — recipe-specific functional test (Phase 2 P3, ≥2 beyond parity).

n8n's editor SPA bootstraps by calling `/rest/settings` to obtain its public settings (webhook URL
base, version, defaults). A working n8n returns a JSON body from this endpoint; a still-starting
n8n returns the placeholder HTML page "n8n is starting up. Please wait" with the SAME 200 status.
So this test polls until the response is real JSON (not the SPA fallback) and asserts known n8n
public-settings keys are present. Non-vacuous: a broken n8n that boots but cannot serve its public
settings (the API the editor SPA literally requires) would fail here, distinguishing it from a
"the HTTP layer is up but n8n itself is dead" failure that /healthz can't catch.

Runs in the custom tier against the shared post-install deployment (live_app).
"""

from __future__ import annotations

import json
import os
import ssl
import sys
import urllib.request

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


def _raw_get_json(url: str, timeout: int = 15):
    """GET the URL and parse the body as JSON only if Content-Type is application/json — n8n's
    "starting up" placeholder returns text/html with status 200, so a content-type check
    distinguishes a real JSON response from the SPA fallback without relying on path-specific shape.
    Returns (status, content_type, json_or_None)."""
    ctx = ssl.create_default_context()
    ctx.check_hostname = False
    ctx.verify_mode = ssl.CERT_NONE
    req = urllib.request.Request(url, method="GET")
    try:
        with urllib.request.urlopen(req, timeout=timeout, context=ctx) as resp:
            ct = resp.headers.get("Content-Type", "")
            raw = resp.read()
    except Exception as e:  # noqa: BLE001
        return 0, "", None, str(e)
    if "application/json" not in ct:
        return resp.status, ct, None, raw.decode(errors="replace")[:80]
    try:
        return resp.status, ct, json.loads(raw), None
    except (json.JSONDecodeError, ValueError) as e:
        return resp.status, ct, None, str(e)


def test_rest_settings_returns_json_with_known_keys(live_app):
    """Poll /rest/settings until it returns real JSON (not the "starting up" SPA placeholder), then
    assert known n8n public-settings keys are present in the response — proves the editor's primary
    API contract is intact."""
    url = f"https://{live_app}/rest/settings"

    last_state: dict = {}

    def _ready():
        status, ct, body, err = _raw_get_json(url)
        last_state.update({"status": status, "ct": ct, "err": err})
        return body if (status == 200 and body is not None) else None

    body = harness_http.assert_converges(
        _ready,
        f"GET {url} returns JSON (n8n REST ready)",
        max_wait=180,
        interval=5,
    )

    # n8n /rest/settings shape: {"data": {<settings dict>}, ...}. The exact key set evolves over
    # versions; assert STRUCTURE (the "data" envelope) + a few stable bootstrap keys that have been
    # part of /rest/settings since n8n introduced user-management — verified on this live deploy
    # (e.g. version 3.2.0+2.20.6).
    assert isinstance(body, dict), f"/rest/settings returned non-dict JSON: {type(body).__name__}"
    data = body.get("data") if "data" in body else body
    assert isinstance(data, dict), (
        f"/rest/settings response missing 'data' envelope: keys={list(body.keys())[:10]}"
    )
    # Bootstrap keys the editor SPA relies on across versions:
    #   - `userManagement`: the auth-mode dict (whether owner-setup is needed, smtp/email mode).
    #   - `defaultLocale`: i18n bootstrap; present on every n8n install.
    #   - `authCookie`: the auth-cookie configuration; consumed by the SPA on every page load.
    expected_any = ("userManagement", "defaultLocale", "authCookie")
    present = [k for k in expected_any if k in data]
    assert present, (
        f"/rest/settings 'data' missing all of {expected_any}; "
        f"got keys: {sorted(data.keys())[:20]} — n8n version may have rotated these names; "
        "update the test."
    )