"""Phase 62 E2E (Playwright): UI customization — placeholder + footer.

Source: ``TODO.md`` L3 — "Allow UI customization. This is brain of reese,
but I want anyone to be able to deploy it with their name… custom
message-input placeholder, custom footer-inner text, custom color
themes…" (owner-locked 2026-09-01: ``BOR_INPUT_PLACEHOLDER``,
``BOR_FOOTER_TEXT`` — A4). Phase 91 (task 03) retired the story's
color-theming half — the CSS-file theme env var and its brand.js
``<link>`` insertion are gone; the admin Theme tab (phases 91,
tasks 04–06) is the only theming surface now, with its own dedicated
E2E suite.

Run in isolation (DB must be up: ``podman compose up -d db``):

    uv run pytest tests/e2e/test_ui_customization.py -v --no-cov

Contract under test:

* an instance booted with BOTH customization vars set shows the custom
  look end-to-end: the ``GET /api/config`` overrides (now the five-key
  set — the retired theming's ``theme`` key is gone), the chat composer
  placeholder (``#message-input``), and the footer line on multiple
  pages (``.footer-text``);
* with NOTHING set the shared conftest server is byte-identical to the
  phase-39/61 no-op contract: the default placeholder, the default
  footer, the built-in ``--brand: #f43f5e``;
* the app NAME stays the default on the custom instance (this suite
  does not re-test ``BOR_APP_NAME`` — that is the phase-39 suite's
  job); the response's ``app_name`` key is the EFFECTIVE value (phase
  91: DB-over-env — for an env-only deployment, the env string itself).

Determinism note: this story needs a SECOND app instance — the shared
conftest server keeps the defaults (every other suite's
placeholder/footer/palette assertions depend on it), so ``custom_server``
boots the same env block the phase-39 brand suite's ``testy_server``
boots (same DB, the mock-LLM base URL, the admin auth, the static dir,
the mock-calibrated threshold) with exactly two changes: port
``APP_PORT + 2`` (the brand suite owns ``APP_PORT + 1`` — do not
collide) and the two env overrides. Every assertion is settled-state:
Playwright's ``expect`` retries ride out the brand.js ``/api/config``
fetch (the two string keys are applied asynchronously, in the SAME
fetch's settled ``.then`` — no second network call).

Test → contract mapping (Playwright Mapping Rule):
1. ``test_config_serves_the_overrides``
2. ``test_chat_page_shows_custom_placeholder_and_footer``
3. ``test_footer_text_applies_on_other_pages``
4. ``test_default_server_is_byte_identical``
"""

from __future__ import annotations

import os
import subprocess
import sys
from collections.abc import Iterator

import httpx
import pytest
from playwright.sync_api import Page, expect

from e2e.conftest import (
    ADMIN_PASSWORD,
    APP_PORT,
    REPO,
    SESSION_SECRET,
    USE_REAL_LLM,
    _wait_http,
)

CUSTOM_PORT = APP_PORT + 2  # the brand suite owns APP_PORT + 1 — no collision
CUSTOM_URL = f"http://127.0.0.1:{CUSTOM_PORT}"

# The two overrides (phase 62, task 05) — the surviving story legs:
CUSTOM_PLACEHOLDER = "Ask the archive…"
CUSTOM_FOOTER = "Custom footer line"

# The phase-39/61 no-op contract on the shared default server:
DEFAULT_NAME = "Brain of Reese"
DEFAULT_PLACEHOLDER = "Ask me anything…"
DEFAULT_FOOTER = "Powered by self-hosted models"
BUILTIN_BRAND = "#f43f5e"  # styles.css's built-in --brand


@pytest.fixture(scope="session")
def custom_server(mock_llm: int) -> Iterator[str]:
    """A SECOND app instance, booted with both customization string
    overrides.

    The shared conftest ``app_server`` keeps the defaults (every other
    suite's placeholder/footer/palette assertions depend on it) — so
    this fixture copies the phase-39 brand suite's ``testy_server`` env
    block verbatim (same DB, the mock-LLM base URL,
    ``BOR_ADMIN_PASSWORD``/``BOR_SESSION_SECRET``, ``BOR_STATIC_DIR``,
    ``BOR_RELEVANCE_THRESHOLD``) with exactly two changes: port
    ``APP_PORT + 2`` (the brand suite owns ``APP_PORT + 1``) and the
    two env overrides below. Started after ``mock_llm`` is available
    (its fixture dependency).
    """
    env = dict(os.environ)
    env.pop("DEBUGPY", None)
    env["BOR_ENVIRONMENT"] = "e2e"
    env["BOR_STATIC_DIR"] = str(REPO / "frontend")
    env["BOR_LLM_BASE_URL"] = (
        "https://aipi.reeseapps.com/v1"
        if USE_REAL_LLM
        else f"http://127.0.0.1:{mock_llm}/v1"
    )
    # The mock's token-overlap embeddings have their own score
    # distribution — the same mock-calibrated threshold as the shared
    # instance, so this suite's pages behave like every other story's.
    env["BOR_RELEVANCE_THRESHOLD"] = "0.30"
    env.setdefault(
        "BOR_DATABASE_URL",
        "postgresql+psycopg://reese:reese@localhost:5432/brain_of_reese",
    )
    # Phase 16: admin auth must be set or create_app() refuses to boot.
    env["BOR_ADMIN_PASSWORD"] = ADMIN_PASSWORD
    env["BOR_SESSION_SECRET"] = SESSION_SECRET
    # Phase 62 (owner-locked 2026-09-01, TODO L3) — the surviving legs:
    env["BOR_INPUT_PLACEHOLDER"] = CUSTOM_PLACEHOLDER
    env["BOR_FOOTER_TEXT"] = CUSTOM_FOOTER
    proc = subprocess.Popen(
        [sys.executable, "-m", "uvicorn", "app.main:app",
         "--host", "127.0.0.1", "--port", str(CUSTOM_PORT), "--log-level", "warning"],
        cwd=REPO,
        env=env,
    )
    try:
        _wait_http(f"{CUSTOM_URL}/api/health")
        yield CUSTOM_URL
    finally:
        proc.terminate()
        try:
            proc.wait(timeout=10)
        except subprocess.TimeoutExpired:
            proc.kill()


def expect_brand_var(page: Page, expected: str, timeout: int = 15_000) -> None:
    """Retrying computed ``:root --brand`` equality. Custom properties
    return the SPECIFIED token from ``getComputedStyle`` (no color
    normalization), so the string compare is stable: ``#f43f5e`` is
    exactly what styles.css declares (the built-in — the page the
    shared default server serves, with no ui_settings row, carries no
    inline theme tag and the stylesheet value stands)."""
    page.wait_for_function(
        """(expected) =>
            getComputedStyle(document.documentElement)
                .getPropertyValue("--brand")
                .trim() === expected""",
        arg=expected,
        timeout=timeout,
    )


# ---------------------------------------------------------------------------
# 1. The endpoint the brand layer reads — the two overrides, the
#    five-key set (the retired theming's theme key is gone)
# ---------------------------------------------------------------------------


def test_config_serves_the_overrides(custom_server: str) -> None:
    r = httpx.get(f"{CUSTOM_URL}/api/config", timeout=5)
    assert r.status_code == 200
    body = r.json()
    # The five-key set (the phase-39/59/62 endpoint contract, phase 91
    # task 03: the retired CSS-file theming's ``theme`` key is gone)
    # with the two customization overrides — the app NAME stays the
    # default (this suite does not re-test BOR_APP_NAME; that is the
    # phase-39 suite's job).
    assert set(body) == {
        "app_name", "version", "docs_repo_configured",
        "input_placeholder", "footer_text",
    }
    assert body["app_name"] == DEFAULT_NAME
    assert body["input_placeholder"] == CUSTOM_PLACEHOLDER
    assert body["footer_text"] == CUSTOM_FOOTER


# ---------------------------------------------------------------------------
# 2. The chat page — placeholder + footer (the theme legs are retired:
#    colors are injected pre-paint server-side, phase 91 task 02)
# ---------------------------------------------------------------------------


def test_chat_page_shows_custom_placeholder_and_footer(
    page: Page, custom_server: str
) -> None:
    page.goto(custom_server + "/")
    # 5. The composer placeholder — the retry rides out the brand.js
    #    /api/config fetch that applies it.
    expect(page.locator("#message-input")).to_have_attribute(
        "placeholder", CUSTOM_PLACEHOLDER, timeout=15_000
    )
    # 6. The footer line on the chat page.
    expect(page.locator(".footer-text").first).to_have_text(
        CUSTOM_FOOTER, timeout=15_000
    )


# ---------------------------------------------------------------------------
# 3. A second page — the footer applies multi-page; the placeholder
#    application no-ops without a composer
# ---------------------------------------------------------------------------


def test_footer_text_applies_on_other_pages(page: Page, custom_server: str) -> None:
    page.goto(custom_server + "/login.html")
    # This page has NO composer — the placeholder application no-ops
    # there via the null guard (no error, no element touched).
    expect(page.locator("#message-input")).to_have_count(0)
    # The footer line applies on every page (the phase-61 hook).
    expect(page.locator(".footer-text").first).to_have_text(
        CUSTOM_FOOTER, timeout=15_000
    )


# ---------------------------------------------------------------------------
# 4. The no-op regression — the shared default server is byte-identical
#    to the phase-39/61 contract
# ---------------------------------------------------------------------------


def test_default_server_is_byte_identical(page: Page, app_server: str) -> None:
    page.goto(app_server + "/")
    # The phase-39/61 no-op contract: the template defaults stand
    # (positive assertions on the static HTML — the brand layer's
    # no-op paths touch nothing when the env vars are unset).
    expect(page.locator("#message-input")).to_have_attribute(
        "placeholder", DEFAULT_PLACEHOLDER
    )
    expect(page.locator(".footer-text").first).to_have_text(DEFAULT_FOOTER)
    # The built-in dark-tech palette stands: with no ui_settings row
    # the server injects no inline theme tag (phase 91 task 02's
    # no-op), so the stylesheet's --brand is the computed value.
    expect_brand_var(page, BUILTIN_BRAND)