"""Reports: the store, the tool, the pages, and the section's own character.

The tests here are mostly about things that fail without saying so. A report
that was never filed, a page that quietly grew a way to reply to one, an index
that exists on a fresh database and not on an upgraded one -- none of those
announce themselves.
"""

from __future__ import annotations

import pytest
from fastapi.testclient import TestClient
from sqlalchemy import select

from lembas.db.models import Report, User


def _user(db) -> User:
    return db.scalars(select(User).order_by(User.created_at)).first()


def _file(db, **kwargs) -> Report:
    from lembas.services import reports as reports_service

    fields = {"title": "A report", "body": "What I found.", **kwargs}
    return reports_service.create(db, owner=_user(db), **fields)


# --- The store ----------------------------------------------------------------
def test_a_report_is_filed_and_read_back(client: TestClient, db, registered):
    from lembas.services import reports as reports_service

    report = _file(db, title="Build failures", body="# Heading\n\nThree tests fail.")
    assert reports_service.get(db, report.id, _user(db)) is report


def test_a_missing_summary_falls_back_to_the_first_real_line(client: TestClient, db, registered):
    """A list of forty reports all reading '# ' is a bug somebody has to explain."""
    report = _file(db, body="# Weekly build report\n\nThree tests fail on ARM.", summary="")
    assert report.summary == "Weekly build report"


def test_a_report_belongs_to_its_owner_alone(client: TestClient, db, registered):
    """There is no sharing here, which is a decision rather than an omission --
    so a second account must not reach the first one's reports."""
    from lembas.security.passwords import hash_password
    from lembas.services import reports as reports_service

    report = _file(db)
    stranger = User(
        email="sam@shire.test", name="Sam", password_hash=hash_password("gardening-is-hard")
    )
    db.add(stranger)
    db.commit()

    assert reports_service.get(db, report.id, stranger) is None
    assert reports_service.recent(db, stranger) == []


def test_an_over_long_body_is_trimmed_rather_than_refused(client: TestClient, db, registered):
    """The rule `memories` already follows: file it short with everything else
    intact, instead of failing the turn that wrote it."""
    from lembas.services import reports as reports_service

    report = _file(db, body="x" * (reports_service.MAX_BODY_CHARS + 500))
    assert len(report.body) == reports_service.MAX_BODY_CHARS


# --- The tool -----------------------------------------------------------------
@pytest.mark.anyio
async def test_report_write_actually_runs(client: TestClient, db, registered):
    """Not that it is declared -- that it *runs*.

    `_run_scratch_write` read a field its own dataclass did not have and raised
    AttributeError for the whole life of the feature, swallowed by `run_tool`'s
    blanket except into a message that reads exactly like a model calling it
    wrongly. The test that existed asserted the family and the risk, which are
    properties of the declaration.
    """
    from lembas.services import tools as tools_service

    context = tools_service.ToolContext(owner_id=_user(db).id, chat_id="", model_id="test-model")
    outcome = await tools_service.run_tool(
        context, "report_write", '{"title": "Findings", "body": "Three tests fail."}'
    )

    assert outcome.event["status"] == "ok", outcome.content
    filed = db.scalars(select(Report)).all()
    assert [r.title for r in filed] == ["Findings"]
    assert filed[0].model_id == "test-model"


@pytest.mark.anyio
async def test_report_write_refuses_an_empty_body(client: TestClient, db, registered):
    from lembas.services import tools as tools_service

    context = tools_service.ToolContext(owner_id=_user(db).id, chat_id="")
    outcome = await tools_service.run_tool(context, "report_write", '{"title": "Nothing"}')

    assert outcome.event["status"] == "error"
    assert db.scalars(select(Report)).all() == []


@pytest.mark.anyio
async def test_report_search_finds_by_body_word(client: TestClient, db, registered):
    """FTS tables are outside the model-driven schema sync, so this is also the
    check that `reports_fts` was actually created and its triggers fire."""
    from lembas.services import tools as tools_service

    _file(db, title="Unrelated", body="Nothing about the thing.")
    _file(db, title="The one", body="A palantir was involved.")

    context = tools_service.ToolContext(owner_id=_user(db).id, chat_id="")
    outcome = await tools_service.run_tool(context, "report_search", '{"query": "palantir"}')

    assert [r["title"] for r in outcome.event["results"]] == ["The one"]


def test_the_index_is_backfilled_on_an_upgrade(client: TestClient, db, registered):
    """The upgrade path, which the fresh-database case does not exercise.

    FTS tables are outside the model-driven schema sync -- they are not
    SQLAlchemy models, so `sync_schema` cannot diff them. On an instance that
    already has reports, `ensure_fts` has to create the index *and* backfill
    what is already in the table; without the backfill every report filed before
    the upgrade is invisible to search forever, and nothing says so.
    """
    from sqlalchemy import text

    from lembas.db.migrations import ensure_fts
    from lembas.db.session import get_engine
    from lembas.services import reports as reports_service

    _file(db, title="Before the upgrade", body="A palantir was involved.")

    # Drop the index and its triggers, leaving the rows: an instance upgrading
    # into this release looks exactly like this.
    with get_engine().begin() as connection:
        for suffix in ("_ai", "_ad", "_au"):
            connection.execute(text(f"DROP TRIGGER IF EXISTS reports_fts{suffix}"))
        connection.execute(text("DROP TABLE IF EXISTS reports_fts"))

    assert "reports_fts" in ensure_fts(get_engine())
    assert [r.title for r in reports_service.search(db, _user(db), "palantir")] == [
        "Before the upgrade"
    ]


# --- The section's character --------------------------------------------------
def test_the_reports_pages_carry_no_composer(client: TestClient, db, registered):
    """Reports are read, never answered, and the way to be sure of that is for
    the machinery that would answer to be absent.

    `chat/_message.html` is the state machine: an `sse-connect` anywhere on
    these pages is a generation this section has no business starting.
    """
    report = _file(db)

    for url in ("/reports", f"/reports/{report.id}"):
        body = client.get(url).text
        assert "sse-connect" not in body, url
        assert "composer__form" not in body, url
        # Nothing on the page can send anything anywhere. Checked as "no field
        # named content" rather than by looking for a URL, because the sidebar
        # legitimately links to sections that do have composers.
        assert 'name="content"' not in body, url


def test_no_route_accepts_a_message_for_a_report(client: TestClient, registered):
    """Asserted on the resolved routes rather than on the templates, because the
    failure this guards against is somebody adding the endpoint first."""
    from lembas.main import app

    # Read from the OpenAPI schema rather than by walking `app.routes`: this
    # FastAPI keeps an included router wrapped rather than flattening it, so the
    # walk finds nothing at all and the assertion passes for the wrong reason.
    writable = {
        f"{method.upper()} {path}"
        for path, methods in app.openapi()["paths"].items()
        if path.startswith(("/reports", "/api/reports"))
        for method in methods
        if method.upper() in {"POST", "PATCH", "PUT"}
    }
    assert writable == {"POST /api/reports/{report_id}/delete"}


def test_a_report_body_cannot_smuggle_html(client: TestClient, db, registered):
    """Model output, hard rule 6. Rendered through services/markdown.py, which
    is the one path allowed to emit HTML here."""
    report = _file(
        db,
        body="<script>alert(1)</script>\n\n[click](javascript:alert(1))",
    )
    body = client.get(f"/reports/{report.id}").text

    assert "<script>alert(1)</script>" not in body
    # The link is left as inert text rather than becoming an anchor, which is
    # the property that matters: what must never appear is the href.
    assert 'href="javascript:' not in body


def test_opening_a_report_clears_its_dot(client: TestClient, db, registered):
    report = _file(db)
    assert report.unread is True

    client.get(f"/reports/{report.id}")
    db.refresh(report)
    assert report.unread is False


def test_the_unread_poll_carries_the_section_dot(client: TestClient, db, registered):
    """Sent on every tick including empty, because it has to be able to clear.
    A dot that survived reading the last report would be news nobody can dismiss.
    """
    report = _file(db)

    showing = client.get("/api/chats/unread").text
    dot = next(s for s in showing.split("<span") if 'id="unread-reports"' in s)
    assert "hidden" not in dot

    client.get(f"/reports/{report.id}")
    cleared = client.get("/api/chats/unread").text
    dot = next(s for s in cleared.split("<span") if 'id="unread-reports"' in s)
    assert "hidden" in dot


def test_the_sidebar_entry_is_outside_the_switchable_tree(client: TestClient, db, registered):
    """It is not a side of the Chat/Agent fork, so flicking the switch must not
    take it away -- the same reason pinned models and New chat sit outside.

    Asserted on position rather than on the include, because the failure mode is
    somebody moving it inside and nothing appearing to break until the switch is
    used.
    """
    body = client.get("/chat").text
    sections = body.index('id="sidebar-sections"')
    tree = body.index('id="sidebar-tree"')
    assert sections < tree

    fragment = client.post("/api/preferences/sidebar-kind", data={"kind": "chat"}).text
    assert 'id="sidebar-sections"' not in fragment