"""Phase 138 E2E (Playwright): markdown blockquotes in the shared renderer.

Source: ``TODO.md`` L3 — "Markdown formatted ">" quotes aren't rendering"
Run in isolation (DB must be up: ``podman compose up -d db``):

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

Seeding reuses the real importer against the phase-138 fixture
directory ``tests/fixtures/quote_docs/`` with the deterministic mock
embeddings. A dedicated tree (like phase 68's ``search_docs``) — the
shared 13-doc fixture set's import count is pinned by many other
suites and must not move. The mock's ``QUOTE_TRIGGER``
(``show me the blockquote``, phase 138 task 03) returns the byte-stable
quote answer: a single-line quote, a 3-line group, a nested ``>>``
collapse, an ``<script>`` XSS probe, a ``>`` inside a fence, a ``>``
in a table cell, and a plain closing line. The fixture
``homelab/quotes.md`` (a 2-line quote block, a re-quoted line after a
blank line, and a ``>`` line inside a fence) is the viewer subject —
the document viewer is database-only, so the imported row is enough.

Test → story mapping (Playwright Mapping Rule):
1. ``test_chat_quote_renders`` — the brain bubble carries FOUR
   ``blockquote.md-quote`` (single line, 3-line group with <br>
   joins, nested collapse, inert XSS line) with no literal ``>`` at
   any block's start; the fenced ``>`` stays code and the table-cell
   ``>`` stays cell text (fences/tables keep their precedence); the
   turn is NOT deflected (the honesty-gate interplay is part of the
   contract).
2. ``test_viewer_quote_renders`` — the fixture's quote block opens
   from the Sources table (admin) in the modal and renders
   ``blockquote.md-quote`` (shared renderer); the fenced ``>`` line
   stays ``<pre><code>``.
3. ``test_restore_keeps_blockquote`` — a reload restores the
   conversation (the localStorage restore path re-runs the shared
   renderer, app.js ``addMessage``) and the restored brain bubble
   keeps every ``blockquote.md-quote``.
"""
from __future__ import annotations

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

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

from app.config import Settings
from app.db import SessionLocal
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" / "quote_docs"

#: Carries the mock's ``QUOTE_TRIGGER`` ("show me the blockquote") and
#: is on-topic (the fixture doc answers it — token-overlap cosine
#: ≈0.5 against the mock embeddings, so the turn is HIGH and the
#: suite can assert non-deflection).
QUESTION = "Show me the blockquote from my homelab backup notes?"
QUOTE_PATH = "homelab/quotes.md"
QUOTE_TITLE = "Homelab Backup Blockquote Notes"
#: The byte-stable answer's plain closing line (the stream-completion
#: marker — it lands last).
ANSWER_END = "a plain closing line"
#: The four rendered blockquote texts, in order (the XSS line renders
#: as its escaped tag TEXT — visible, inert).
QUOTED_TEXTS = [
    "a short single-line quote",
    "the first line\nthe second line\nthe third line",
    "nested quotes collapse to one level",
    "<script>alert(1)</script>",
]
FENCE_LINE = "> inside a fence stays fence content"
CELL_TEXT = "> x stays a cell"


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's sync API keeps an asyncio loop running on the test
    thread, so ``asyncio.run`` cannot be called directly from a test
    body (the established house helper).
    """
    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) -> ImportSummary:
    """Truncate the KB (+ the global prompt-state rows), then re-import
    the phase-138 fixture (one document)."""
    with SessionLocal() as db:
        db.execute(
            text("TRUNCATE chunks, documents, query_log, steering_notes, kb_overview")
        )
        db.commit()
    summary = _run_in_thread(_import_fixtures(mock_port))
    assert summary is not None and summary.added == 1, summary
    return summary


def _ask_quote_answer(page: Page, app_url: str) -> Any:
    """Drive the trigger question and return the brain bubble once the
    whole byte-stable quote answer has streamed in (the plain closing
    line lands last)."""
    login(page, app_url, next="/")  # phase 79: chat is require_user-gated
    page.fill("#message-input", QUESTION)
    page.click("#send-btn")
    bubble = page.locator(".msg.brain .bubble").first
    bubble.wait_for(state="visible", timeout=30_000)
    expect(bubble).to_contain_text(ANSWER_END, timeout=30_000)
    # Non-deflection is part of the quote contract (honesty gate
    # interplay, like phase 44's table answer).
    expect(page.locator(".msg.brain.is-deflected")).to_have_count(0)
    return bubble


def _assert_blockquotes(bubble: Any, texts: list[str]) -> None:
    """The shared assertion: exactly len(texts) blockquote.md-quote
    elements with those innerTexts, in order, and no literal quote
    marker (the escaped &gt;) at any block's start — the bug from
    TODO.md L3."""
    blocks = bubble.locator("blockquote.md-quote")
    expect(blocks).to_have_count(len(texts))
    for i, quoted in enumerate(texts):
        inner = blocks.nth(i).inner_text()
        assert inner == quoted, f"block {i}: {inner!r} != {quoted!r}"
        assert not inner.startswith(">"), (
            f"block {i} still starts with a literal quote marker: {inner!r}"
        )
    # no nested blockquote (locked A1: >> collapses to one level)
    expect(bubble.locator("blockquote.md-quote blockquote")).to_have_count(0)


# ---------------------------------------------------------------------------
# 1. Chat: the "> " lines render as semantic blockquotes
# ---------------------------------------------------------------------------


def test_chat_quote_renders(
    page: Page, app_url: str, mock_llm: int, db_ready: None
) -> None:
    _reset_db(mock_llm)
    page.set_default_timeout(30_000)
    bubble = _ask_quote_answer(page, app_url)

    # The four quote shapes of the byte-stable answer — the single
    # line, the 3-line group (<br> joins), the nested collapse, and the
    # inert XSS line (its escaped tag is VISIBLE text).
    _assert_blockquotes(bubble, QUOTED_TEXTS)

    # The XSS probe stayed inert: no live <script> anywhere in the
    # bubble, and the escaped form is what the DOM carries.
    expect(bubble.locator("script")).to_have_count(0)
    xss_html = bubble.locator("blockquote.md-quote").nth(3).inner_html()
    assert "&lt;script&gt;alert(1)&lt;/script&gt;" in xss_html, (
        "the XSS line must carry the escaped form in the DOM"
    )

    # Fences keep their precedence: the > line inside the fence stays
    # <pre><code> content (raw text), never a blockquote (the count
    # above already excludes it).
    pre = bubble.locator("pre code")
    expect(pre).to_have_count(1)
    assert FENCE_LINE in pre.inner_text(), "the fenced > line must stay raw fence content"

    # Tables keep their precedence: the > in the cell is cell text.
    table = bubble.locator("table.md-table")
    expect(table).to_have_count(1)
    expect(table.locator("td")).to_have_count(1)
    assert table.locator("td").inner_text() == CELL_TEXT
    expect(table.locator("blockquote")).to_have_count(0)

    # Grounded (the answer is the mock's non-deflected quote branch)
    # and ZERO citation chips: the turn read nothing (phase 119,
    # LOCKED A1).
    expect(page.locator(".msg.brain .source-chip")).to_have_count(0)


# ---------------------------------------------------------------------------
# 2. Shared renderer: the viewer/modal renders the fixture's quotes
# ---------------------------------------------------------------------------


def test_viewer_quote_renders(
    page: Page, app_url: str, mock_llm: int, db_ready: None
) -> None:
    _reset_db(mock_llm)
    page.set_default_timeout(30_000)

    # Admin → Sources → the quotes.md row → same-page document modal.
    # Phase 97: the catalog is the drill-down tree — the row lives at
    # its folder level (``quote_docs`` → ``homelab``).
    login(page, app_url)  # phase 16: the Sources catalog is admin-only
    for name in ("quote_docs", "homelab"):  # the fixture's source + folder
        page.click(f'#folders-tbody a.folder-link:text-is("{name}")')
    row = page.locator("#docs-tbody tr", has_text=QUOTE_PATH)
    expect(row).to_have_count(1)
    row.locator("td:nth-child(2) a.doc-link").click()
    expect(page.locator(".doc-modal")).to_be_visible()
    expect(page.locator("#doc-modal-title")).to_have_text(QUOTE_TITLE)

    # The same <blockquote class="md-quote"> shape the chat bubble
    # gets — the shared renderer serves the viewer too: the 2-line
    # block (<br> joins) and the re-quoted single line after the blank
    # line (the group-termination rule, live in a real document).
    content = page.locator("#doc-modal-content")
    _assert_blockquotes(
        content,
        [
            "Backups run nightly at 02:00 and the restore window is 30 minutes.\n"
            "The offsite copy is the only copy that counts.",
            "Short blockquotes stay on one line.",
        ],
    )

    # The fixture's fenced > line is code, never a blockquote (the
    # count above already excludes it).
    pre = content.locator("pre code")
    expect(pre).to_have_count(1)
    assert "the shell prompt is not a markdown quote" in pre.inner_text()


# ---------------------------------------------------------------------------
# 3. Restore: a reload re-renders the saved conversation through the
#    same shared renderer and keeps the blockquotes
# ---------------------------------------------------------------------------


def test_restore_keeps_blockquote(
    page: Page, app_url: str, mock_llm: int, db_ready: None
) -> None:
    _reset_db(mock_llm)
    page.set_default_timeout(30_000)
    _ask_quote_answer(page, app_url)

    # Reload — the same context keeps its localStorage; the phase-14
    # restore path re-runs the shared renderer over the persisted RAW
    # text (app.js addMessage), so the blockquotes must come back.
    page.reload()
    expect(page.locator("#empty-state")).to_be_hidden()
    bubble = page.locator(".msg.brain .bubble").first
    bubble.wait_for(state="visible", timeout=30_000)
    expect(bubble).to_contain_text(ANSWER_END, timeout=30_000)
    expect(page.locator(".msg.brain.is-deflected")).to_have_count(0)

    # The restored bubble keeps every blockquote (same texts, same
    # order — the restore runs the SAME renderer).
    _assert_blockquotes(bubble, QUOTED_TEXTS)
    expect(bubble.locator("script")).to_have_count(0)
    expect(bubble.locator("pre code")).to_have_count(1)
    expect(bubble.locator("table.md-table")).to_have_count(1)