"""Integration tests: model surface, ai_log_job translation fan-out,
route-level localized fetch, settings PATCH validation."""
from __future__ import annotations

import pytest


def _build_session_factory(tmp_path):
    """Per-test sqlite engine + factory. Mirrors test_referral_conversion.py."""
    from sqlalchemy.ext.asyncio import async_sessionmaker, create_async_engine

    from app import db as db_mod
    from app.db import Base
    import app.models  # noqa: F401 — registers models on Base.metadata

    engine = create_async_engine(f"sqlite+aiosqlite:///{tmp_path}/loc.db")
    factory = async_sessionmaker(engine, expire_on_commit=False)
    db_mod._engine = engine
    db_mod._session_factory = factory

    async def _setup():
        async with engine.begin() as conn:
            await conn.run_sync(Base.metadata.create_all)

    return engine, factory, _setup


def test_user_has_lang_column_with_default_en():
    from sqlalchemy import inspect
    from app.models import User

    cols = {c.name: c for c in inspect(User).columns}
    assert "lang" in cols
    assert cols["lang"].nullable is False
    # SQLAlchemy default may be a callable or a literal — check both.
    default = cols["lang"].default
    assert default is not None
    if hasattr(default, "arg"):
        assert default.arg == "en"


def test_strategic_log_translation_model_columns():
    from sqlalchemy import inspect
    from app.models import StrategicLogTranslation

    cols = {c.name: c for c in inspect(StrategicLogTranslation).columns}
    assert "log_id" in cols
    assert "lang" in cols
    assert "content_md" in cols
    assert "generated_at" in cols
    assert "llm_model" in cols
    assert "llm_cost_usd" in cols
    assert cols["log_id"].nullable is False
    assert cols["lang"].nullable is False
    assert cols["content_md"].nullable is False


@pytest.mark.asyncio
async def test_log_translation_fanout_no_active_non_en_users(tmp_path, monkeypatch):
    """When no users have an active non-en lang, the fan-out makes no
    translation calls and no rows are inserted."""
    from unittest.mock import AsyncMock
    from sqlalchemy import select

    from app.db import utcnow
    from app.models import StrategicLog, StrategicLogTranslation, User
    from app.jobs import ai_log_job

    _, factory, setup = _build_session_factory(tmp_path)
    await setup()

    fake_translate = AsyncMock()
    monkeypatch.setattr(ai_log_job, "translate", fake_translate)

    # Seed an English user (no non-en users).
    async with factory() as session:
        session.add(User(id=1, email="en@x", tier="paid", lang="en"))
        slog = StrategicLog(
            generated_at=utcnow(), content="# Open\n\nDown 0.4%.",
            model="test-model",
            tone="INTERMEDIATE", analysis="NORMAL",
        )
        session.add(slog)
        await session.commit()
        log_id = slog.id

    async with factory() as session:
        await ai_log_job.translate_log_for_active_languages(session, log_id)

    fake_translate.assert_not_awaited()
    async with factory() as session:
        rows = (await session.execute(select(StrategicLogTranslation))).scalars().all()
    assert rows == []


@pytest.mark.asyncio
async def test_log_translation_fanout_italian_user(tmp_path, monkeypatch):
    """One user at lang=it triggers one translation; the row lands with
    the right lang and log_id."""
    from sqlalchemy import select

    from app.db import utcnow
    from app.models import StrategicLog, StrategicLogTranslation, User
    from app.services.openrouter import LogResult
    from app.jobs import ai_log_job

    _, factory, setup = _build_session_factory(tmp_path)
    await setup()

    async def _fake_translate(client, text, target_lang):
        assert target_lang == "it"
        return "# Apertura\n\nIn calo 0,4%.", LogResult(
            content="# Apertura\n\nIn calo 0,4%.",
            model="deepseek/deepseek-v4-flash",
            prompt_tokens=300, completion_tokens=80, cost_usd=0.00002,
        )
    monkeypatch.setattr(ai_log_job, "translate", _fake_translate)

    async with factory() as session:
        session.add(User(id=2, email="it@x", tier="paid", lang="it"))
        slog = StrategicLog(
            generated_at=utcnow(), content="# Open\n\nDown 0.4%.",
            model="test-model",
            tone="INTERMEDIATE", analysis="NORMAL",
        )
        session.add(slog)
        await session.commit()
        log_id = slog.id

    async with factory() as session:
        await ai_log_job.translate_log_for_active_languages(session, log_id)

    async with factory() as session:
        rows = (await session.execute(select(StrategicLogTranslation))).scalars().all()
    assert len(rows) == 1
    row = rows[0]
    assert row.log_id == log_id
    assert row.lang == "it"
    assert row.content_md.startswith("# Apertura")
    assert row.llm_model == "deepseek/deepseek-v4-flash"
    assert row.llm_cost_usd == pytest.approx(0.00002)


@pytest.mark.asyncio
async def test_log_translation_fanout_per_language_failure_isolated(tmp_path, monkeypatch):
    """If one language's translation fails, the others (if any) still land
    and the job does not raise."""
    from sqlalchemy import select

    from app.db import utcnow
    from app.models import StrategicLog, StrategicLogTranslation, User
    from app.jobs import ai_log_job

    _, factory, setup = _build_session_factory(tmp_path)
    await setup()

    async def _fake_translate(client, text, target_lang):
        raise RuntimeError("upstream down")
    monkeypatch.setattr(ai_log_job, "translate", _fake_translate)

    async with factory() as session:
        session.add(User(id=3, email="it@x", tier="paid", lang="it"))
        slog = StrategicLog(
            generated_at=utcnow(), content="# Open",
            model="test-model",
            tone="INTERMEDIATE", analysis="NORMAL",
        )
        session.add(slog)
        await session.commit()
        log_id = slog.id

    # Must NOT raise.
    async with factory() as session:
        await ai_log_job.translate_log_for_active_languages(session, log_id)

    async with factory() as session:
        rows = (await session.execute(select(StrategicLogTranslation))).scalars().all()
    assert rows == []