"""Phase 09 E2E (Playwright): retrieval quality — hybrid search end to end.

Story: ``.agents/user_stories/retrieval-quality.md``
Run in isolation (DB must be up: ``podman compose up -d db``):

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

Seeding reuses the real importer against ``tests/fixtures/docs/`` with the
deterministic mock embeddings (same pattern as the earlier story suites).
The four tests map the story's acceptance criteria:

1. multi-format fixture import — hidden doc excluded, ``/api/docs`` counts
2. "How did I install gitlab?" — grounded (not deflected), gitlab chip,
   ``query_log`` row with the gitlab doc in ``sources``
3. keyword-only question ("kafkabridge") beats the vector ranking — the
   FTS-OR gate grounds it end to end despite weak cosine
4. "sourdough" — deflected bubble + ≥2 "Maybe try" chips
"""
from __future__ import annotations

import asyncio
from pathlib import Path
from threading import Thread
from typing import Any

import httpx
from playwright.sync_api import Page, expect
from sqlalchemy import select, text

from app.config import Settings, get_settings
from app.db import SessionLocal
from app.models import QueryLog
from app.rag.importer import ImportSummary, import_sources
from app.rag.llm import LLMClient
from e2e.auth_helpers import login

REPO = Path(__file__).resolve().parents[2]
FIXTURES = REPO / "tests" / "fixtures" / "docs"
GITLAB_QUESTION = "How did I install gitlab?"
KEYWORD_QUESTION = "How does kafkabridge work?"
OFF_TOPIC = "sourdough starter"
MOCK_ANSWER_MARKER = "Deterministic mock answer for E2E"


async def _import_fixtures(mock_port: int) -> ImportSummary:
    kwargs: dict[str, Any] = {"_env_file": None, "llm_base_url": f"http://127.0.0.1:{mock_port}/v1"}
    settings = Settings(**kwargs)  # pyright: ignore[reportCallIssue]
    return await import_sources([FIXTURES], LLMClient(settings))


def _run_in_thread(coro: Any) -> Any:
    """Run a coroutine on a worker thread (Playwright owns the test loop)."""
    box: dict[str, Any] = {}

    def runner() -> None:
        try:
            box["value"] = asyncio.run(coro)
        except BaseException as e:  # noqa: BLE001 — re-raised on the test thread
            box["error"] = e

    t = Thread(target=runner)
    t.start()
    t.join()
    if "error" in box:
        raise box["error"]
    return box["value"]


def _reset_db(mock_port: int, seed: bool) -> ImportSummary | None:
    """Truncate the KB (and query log), then optionally re-import fixtures."""
    with SessionLocal() as db:
        db.execute(text("TRUNCATE chunks, documents, query_log"))
        db.commit()
    if not seed:
        return None
    return _run_in_thread(_import_fixtures(mock_port))


def _ask(page: Page, message: str) -> None:
    page.fill("#message-input", message)
    page.click("#send-btn")


def test_multi_format_import_hidden_doc_excluded(
    page: Page, app_url: str, mock_llm: int, db_ready: None
) -> None:
    """A9 (revised): all seventeen formats import; hidden (dot) paths never do."""
    summary = _reset_db(mock_llm, seed=True)
    assert summary is not None
    # Thirteen A9-format fixture files (phase 44 added homelab/tables.md,
    # phase 47 added the quadlet + j2 fixtures); .hidden/junk.md must never
    # be walked.
    assert summary.added == 13
    assert summary.formats == {
        "md": 5, "yaml": 1, "json": 1, "py": 1, "txt": 1,
        "container": 1, "network": 1, "volume": 1, "j2": 1,  # phase 47
    }

    # Phase 16: the catalog is admin-only — perform the real form login,
    # then call the API with the signed cookie the browser now holds.
    login(page, app_url, next="/sources.html")
    cookies = {
        c["name"]: c["value"]
        for c in page.context.cookies()
        if "name" in c and "value" in c
    }
    r = httpx.get(f"{app_url}/api/docs", timeout=10, cookies=cookies)
    assert r.status_code == 200
    docs = r.json()["documents"]
    assert len(docs) == 13
    assert all(".hidden" not in d["path"] for d in docs)
    assert {d["path"] for d in docs} >= {
        "homelab/container_gitlab/gitlab.md",
        "homelab/container_gitlab/gitlab-compose.yaml",
        "homelab/networking/static-dns.json",
        "homelab/scripts/uptime_probe.py",
        "homelab/ssh/ssh_aliases.txt",
    }

    # The Sources page (we're already on it, signed in) reflects the set.
    # Phase 97: the file table is hidden at the top level (the source
    # row is the tree's top) — drill into the source, where a
    # `.hidden` junk row WOULD appear, and scope the absence there
    # (the stat card pins the 13 total: the junk is counted nowhere).
    expect(page.locator("#stat-docs")).to_have_text("13")
    page.locator("#folders-tbody .folder-link").first.wait_for(state="visible")
    page.click('#folders-tbody a.folder-link:text-is("docs")')
    expect(page.locator("#docs-tbody tr", has_text=".hidden")).to_have_count(0)
    expect(page.locator("#folders-tbody .folder-link", has_text=".hidden")).to_have_count(0)


def test_gitlab_question_is_grounded_with_gitlab_chip(
    page: Page, app_url: str, mock_llm: int, db_ready: None
) -> None:
    """The ranking problem that motivated this phase: a tool-name question
    must land on the tool's own document — not a generic template."""
    _reset_db(mock_llm, seed=True)
    page.set_default_timeout(30_000)
    login(page, app_url, next="/")  # phase 79: chat is require_user-gated

    _ask(page, GITLAB_QUESTION)
    expect(page.locator(".msg.user .bubble")).to_contain_text(GITLAB_QUESTION)

    bubble = page.locator(".msg.brain .bubble").first
    bubble.wait_for(state="visible", timeout=30_000)
    expect(bubble).to_contain_text(MOCK_ANSWER_MARKER, timeout=30_000)
    # Grounded: no deflected bubble at all.
    expect(page.locator(".msg.brain.is-deflected")).to_have_count(0)

    # The gitlab document is cited (a chip carrying its path).
    chip = page.locator(".msg.brain .source-chip", has_text="container_gitlab/gitlab.md")
    expect(chip).to_have_count(1, timeout=30_000)

    # Durable record: not deflected, and the gitlab doc is in sources.
    with SessionLocal() as db:
        row = db.scalars(select(QueryLog)).one()
    assert row.question == GITLAB_QUESTION
    assert row.deflected is False
    assert "container_gitlab/gitlab.md" in row.sources


def test_keyword_only_question_beats_vector_ranking(
    page: Page, app_url: str, mock_llm: int, db_ready: None
) -> None:
    """The FTS-OR gate end to end: "kafkabridge" appears in exactly one
    fixture doc (static-dns.json) and the question's cosine overlap is
    weak — the lexical branch is what grounds the answer."""
    _reset_db(mock_llm, seed=True)
    page.set_default_timeout(30_000)
    login(page, app_url, next="/")  # phase 79: chat is require_user-gated

    _ask(page, KEYWORD_QUESTION)
    bubble = page.locator(".msg.brain .bubble").first
    bubble.wait_for(state="visible", timeout=30_000)
    expect(bubble).to_contain_text(MOCK_ANSWER_MARKER, timeout=30_000)
    expect(page.locator(".msg.brain.is-deflected")).to_have_count(0)

    # The FTS-matched doc is the TOP source chip (it beats the vector rank).
    first_chip = page.locator(".msg.brain .source-chip").first
    first_chip.wait_for(state="visible", timeout=30_000)
    expect(first_chip).to_contain_text("static-dns.json")

    with SessionLocal() as db:
        row = db.scalars(select(QueryLog)).one()
    # Weak vector score…
    assert row.top_score < get_settings().relevance_threshold
    # …but a lexical hit grounded it (the FTS-OR branch).
    assert (row.fts_hits or 0) >= 1
    assert row.deflected is False
    assert "homelab/networking/static-dns.json" in row.sources


def test_off_topic_still_deflects_with_chips(
    page: Page, app_url: str, mock_llm: int, db_ready: None
) -> None:
    """A8 (revised): deflection requires weak cosine AND zero FTS hits.
    "sourdough" matches nothing in the KB lexically → honest deflection."""
    _reset_db(mock_llm, seed=True)
    page.set_default_timeout(30_000)
    login(page, app_url, next="/")  # phase 79: chat is require_user-gated

    _ask(page, OFF_TOPIC)
    bubble = page.locator(".msg.brain.is-deflected .bubble").first
    bubble.wait_for(state="visible", timeout=30_000)
    expect(page.locator(".msg.brain.is-deflected")).to_have_count(1)

    chips = page.locator(".msg.brain.is-deflected .maybe-try .suggestion-chip")
    expect(chips.first).to_be_visible(timeout=30_000)
    assert chips.count() >= 2, "deflection must offer 2-3 alternative chips"
    assert all(c.strip() for c in chips.all_inner_texts())

    with SessionLocal() as db:
        row = db.scalars(select(QueryLog)).one()
    assert row.question == OFF_TOPIC
    assert row.deflected is True
    assert 0.0 < row.top_score < get_settings().relevance_threshold
    assert row.fts_hits == 0  # deflection is only reached with zero hits