"""Integration: the admin UI-settings gate + the /api/config effective
strings (phase 91, task 01).

The auth + public-contract half of task 01, driven through the real app
(TestClient keeps the cookie jar — the house ``test_auth_api`` /
``test_tokens_api`` admin-login pattern):

* the admin gate — ``GET /api/ui-settings`` and ``PUT`` are 403
  ``admin only`` for anonymous callers AND for a signed-in token USER
  (role ``"user"`` — the router-wide ``require_admin`` closes the
  surface on every method, the phase-79 token matrix contract), 200 for
  the admin on both;
* ``/api/config`` effective strings (B1: DB-over-env) — an env-only
  deployment (no ``ui_settings`` row) returns the env strings; after an
  admin PUT, the ANONYMOUS ``/api/config`` returns the DB strings;
* the five-key /api/config contract: the retired CSS-file theming's
  ``theme`` key is GONE (task 03) — the app metadata, the docs flag,
  and the two effective strings are the entire response.

Real Postgres (``podman compose up -d db``); no LLM involved.

Requires:  podman compose up -d db
"""
from __future__ import annotations

from collections.abc import Iterator

import pytest
from fastapi.testclient import TestClient
from sqlalchemy import select, text
from sqlalchemy.orm import Session

from app.config import get_settings
from app.core import theming
from app.main import app as fastapi_app
from app.models import UiSettings
from tests.conftest import ADMIN_PASSWORD


@pytest.fixture(autouse=True)
def clean_state(db: Session) -> Iterator[None]:
    """Both touched tables are global state: the single ui_settings row
    and the api_tokens the token-user test creates (the house
    TRUNCATE/DELETE reset pattern)."""
    db.execute(text("DELETE FROM ui_settings"))
    db.execute(text("TRUNCATE api_tokens"))
    db.commit()
    yield
    db.execute(text("DELETE FROM ui_settings"))
    db.execute(text("TRUNCATE api_tokens"))
    db.commit()


def _admin_client() -> TestClient:
    """A fresh client signed in as the admin (the ``_admin_client``
    pattern from test_auth_api.py)."""
    c = TestClient(fastapi_app)
    r = c.post("/api/login", json={"password": ADMIN_PASSWORD})
    assert r.status_code == 204, f"admin login failed: {r.status_code} {r.text}"
    return c


def test_anonymous_get_and_put_403(client: TestClient) -> None:
    """Router-level ``require_admin``: both routes are 403 ``admin only``
    for the unsigned-in caller (one fixed detail — no enumeration)."""
    r = client.get("/api/ui-settings")
    assert r.status_code == 403
    assert r.json() == {"detail": "admin only"}
    r = client.put("/api/ui-settings", json={"app_name": "nope"})
    assert r.status_code == 403
    assert r.json() == {"detail": "admin only"}


def test_token_user_get_and_put_403(client: TestClient) -> None:
    """A signed-in token USER (role ``"user"``) is NOT the admin: the
    Theme tab's surface is closed to them on both methods (the
    phase-79 token matrix contract — only the admin themes the
    deployment)."""
    admin = _admin_client()
    r = admin.post("/api/tokens", json={"label": "alice"})
    assert r.status_code == 201, r.text
    token = r.json()["token"]
    assert client.post("/api/token-auth", json={"token": token}).status_code == 204
    assert client.get("/api/whoami").json() == {"authenticated": True, "role": "user"}

    r = client.get("/api/ui-settings")
    assert r.status_code == 403
    assert r.json() == {"detail": "admin only"}
    r = client.put("/api/ui-settings", json={"brand": "#123456"})
    assert r.status_code == 403
    assert r.json() == {"detail": "admin only"}


def test_admin_get_and_put_200(client: TestClient, db: Session) -> None:
    """The admin passes the gate on both methods: GET reports the
    effective defaults (row missing), PUT persists + reports the new
    effective values, and a follow-up GET reads them back."""
    client.post("/api/login", json={"password": ADMIN_PASSWORD})

    r = client.get("/api/ui-settings")
    assert r.status_code == 200
    body = r.json()
    assert set(body) == set(theming.STRING_FIELDS) | set(theming.COLOR_FIELDS)
    assert body["app_name"] == get_settings().app_name
    assert {k: body[k] for k in theming.COLOR_FIELDS} == theming.BUILTIN_COLORS

    r = client.put(
        "/api/ui-settings",
        json={"app_name": "Reese Brain", "brand": "#818cf8"},
    )
    assert r.status_code == 200, r.text
    assert r.json()["app_name"] == "Reese Brain"
    assert r.json()["brand"] == "#818cf8"

    r = client.get("/api/ui-settings")
    assert r.status_code == 200
    assert r.json()["app_name"] == "Reese Brain"
    assert r.json()["brand"] == "#818cf8"
    # Untouched fields stay at their defaults (DB-over-env / -built-in).
    assert r.json()["footer_text"] == get_settings().footer_text
    assert r.json()["bg"] == theming.BUILTIN_COLORS["bg"]


def test_admin_grid_line_validation_and_normalization(
    client: TestClient, db: Session
) -> None:
    """Phase 92 (task 01): the 9th identity color against the LIVE API —
    a bad hex is a 422 naming ``grid_line`` (same fixed detail as the
    other 8); the built-in value stores NULL (the response still
    reports the built-in — the no-op normalization); a non-built-in
    value is stored and reported back. The admin gate itself is pinned
    unchanged by the tests above (router-wide ``require_admin``)."""
    client.post("/api/login", json={"password": ADMIN_PASSWORD})

    r = client.put("/api/ui-settings", json={"grid_line": "nope"})
    assert r.status_code == 422, r.text
    assert r.json()["detail"] == "grid_line must be a #rrggbb hex color"

    r = client.put("/api/ui-settings", json={"grid_line": "#4a2626"})
    assert r.status_code == 200, r.text
    assert r.json()["grid_line"] == theming.BUILTIN_COLORS["grid_line"]
    row = db.execute(select(UiSettings).where(UiSettings.id == 1)).scalars().first()
    assert row is not None, "the PUT upsert creates the id-1 row"
    assert row.grid_line is None  # built-in → NULL normalization

    r = client.put("/api/ui-settings", json={"grid_line": "#123123"})
    assert r.status_code == 200, r.text
    assert r.json()["grid_line"] == "#123123"
    r = client.get("/api/ui-settings")
    assert r.status_code == 200
    assert r.json()["grid_line"] == "#123123"  # the stored value reads back
    assert len(r.json()) == 20  # the 20-value shape (17 colors + 3 strings, phase 93)


def test_admin_semantic_fields_round_trip(client: TestClient, db: Session) -> None:
    """Phase 93 (task 01): the 8 semantic state colors against the LIVE
    API — a bad hex is a 422 naming the field (same fixed detail as the
    identity colors); a non-built-in value is lowercased on store and
    reads back through GET; a built-in value stores NULL (the response
    still reports the built-in); an absent (null) field stores NULL.
    The response is the effective values for all 20 keys."""
    client.post("/api/login", json={"password": ADMIN_PASSWORD})

    r = client.put("/api/ui-settings", json={"ok_bg": "not-a-color"})
    assert r.status_code == 422, r.text
    assert r.json()["detail"] == "ok_bg must be a #rrggbb hex color"

    r = client.put(
        "/api/ui-settings",
        json={"ok_ink": "#444444", "accent_bg": "#222222", "err_line": "#EFEFEF"},
    )
    assert r.status_code == 200, r.text
    assert r.json()["ok_ink"] == "#444444"  # stored + reported
    assert r.json()["accent_bg"] == "#222222"  # stored + reported
    assert r.json()["err_line"] == "#efefef"  # upper → lowercased on store

    row = db.execute(select(UiSettings).where(UiSettings.id == 1)).scalars().first()
    assert row is not None, "the PUT upsert creates the id-1 row"
    assert row.ok_ink == "#444444"
    assert row.accent_bg == "#222222"
    assert row.err_line == "#efefef"  # the stored column, lowercase
    assert row.err_bg is None  # absent (null) field → NULL
    assert row.accent_ink is None  # absent (null) field → NULL

    r = client.get("/api/ui-settings")
    assert r.status_code == 200
    body = r.json()
    assert set(body) == set(theming.STRING_FIELDS) | set(theming.COLOR_FIELDS)
    assert len(body) == 20
    # GET returns the EFFECTIVE values: the stored ones over the
    # built-ins for the untouched 14 colors.
    assert body["ok_ink"] == "#444444"
    assert body["err_bg"] == theming.BUILTIN_COLORS["err_bg"]
    assert body["accent_ink"] == theming.BUILTIN_COLORS["accent_ink"]
    untouched = [k for k in theming.COLOR_FIELDS if k not in ("ok_ink", "accent_bg", "err_line")]
    assert {k: body[k] for k in untouched} == {
        k: theming.BUILTIN_COLORS[k] for k in untouched
    }  # the 14 untouched colors report their built-ins

    # The built-in → NULL normalization: PUT the built-in back (one in
    # uppercase) — the row's semantic columns return to NULL and the
    # effective values are still the built-ins (no-op contract).
    body_put = {"ok_ink": theming.BUILTIN_COLORS["ok_ink"].upper(),
                "accent_bg": theming.BUILTIN_COLORS["accent_bg"],
                "err_line": theming.BUILTIN_COLORS["err_line"]}
    r = client.put("/api/ui-settings", json=body_put)
    assert r.status_code == 200, r.text
    db.expire_all()
    row = db.execute(select(UiSettings).where(UiSettings.id == 1)).scalars().first()
    assert row is not None
    assert row.ok_ink is None  # built-in (uppercase in) → NULL
    assert row.accent_bg is None  # built-in → NULL
    assert row.err_line is None  # built-in → NULL
    for key in theming.COLOR_FIELDS:
        assert r.json()[key] == theming.BUILTIN_COLORS[key]


def _config_keys() -> set[str]:
    """The /api/config key set after task 03 (phase 91): the retired
    CSS-file theming's ``theme`` key is gone; phase 122 (task 01) added
    the ``images`` flag — the six keys below are the contract."""
    return {"app_name", "version", "docs_repo_configured",
            "images", "input_placeholder", "footer_text"}


def test_api_config_env_only_deployment_returns_env_strings(client: TestClient) -> None:
    """B1 with an empty ui_settings table: /api/config serves the ENV
    strings (the code defaults — conftest pins them) and the key set is
    the five-key contract (the retired theming's ``theme`` key is gone
    — task 03)."""
    r = client.get("/api/config")
    assert r.status_code == 200
    body = r.json()
    assert set(body) == _config_keys()
    assert body["app_name"] == get_settings().app_name
    assert body["input_placeholder"] == get_settings().input_placeholder
    assert body["footer_text"] == get_settings().footer_text


def test_api_config_carries_no_theme_key(client: TestClient) -> None:
    """Phase 91 (task 03): the retired CSS-file theming left NO trace
    in the endpoint — the response has no ``theme`` key at all (an
    env-only deployment and a themed one answer with the same keys; the
    colors are injected pre-paint, they never ride this fetch)."""
    r = client.get("/api/config")
    assert r.status_code == 200
    assert "theme" not in r.json()


def test_api_config_returns_db_strings_after_admin_put(
    client: TestClient, db: Session
) -> None:
    """B1 with a set row: after an admin PUT, the ANONYMOUS /api/config
    (the frontend's boot fetch — no admin needed) serves the DB strings
    over the env values; the untouched fields keep the env values; the
    five-key set is unchanged (the retired ``theme`` key is absent)."""
    admin = _admin_client()
    r = admin.put(
        "/api/ui-settings",
        json={
            "app_name": "Brain of Testy",
            "input_placeholder": "Ask the vault…",
            "footer_text": "Powered by my own models",
        },
    )
    assert r.status_code == 200, r.text

    r = client.get("/api/config")
    assert r.status_code == 200  # /api/config stays PUBLIC (no gate)
    body = r.json()
    assert set(body) == _config_keys()
    assert body["app_name"] == "Brain of Testy"
    assert body["input_placeholder"] == "Ask the vault…"
    assert body["footer_text"] == "Powered by my own models"
    # The colors never ride /api/config (the pre-paint injection is
    # task 02; brand.js's surface is the five keys).
    assert "theme" not in body
    assert body["version"] == get_settings().app_version