"""Smoke tests for /api/meet-kevin/* routes.

Three behaviors covered:
  1. GET /api/meet-kevin/health      → 200 with counts_by_status, daily_cost_usd, daily_cost_cap_usd
  2. GET /api/meet-kevin/videos      (empty DB) → {"videos": [], "total": 0, "page": 1, "per_page": 20}
  3. GET /api/meet-kevin/stocks      (empty DB) → {"stocks": []}
"""

from __future__ import annotations

from unittest.mock import AsyncMock, MagicMock

import pytest
from fastapi.testclient import TestClient

from services.api_gateway.auth.middleware import get_current_user
from services.api_gateway.config import ApiGatewayConfig
from services.api_gateway.main import create_app


# ---------------------------------------------------------------------------
# Fixtures
# ---------------------------------------------------------------------------


@pytest.fixture()
def config() -> ApiGatewayConfig:
    return ApiGatewayConfig(
        jwt_secret_key="test-secret-meet-kevin",
        database_url="sqlite+aiosqlite:///:memory:",
        redis_url="redis://localhost:6379/0",
    )


@pytest.fixture()
def mock_user() -> dict:
    return {"sub": "user-test", "username": "tester", "type": "access"}


@pytest.fixture()
def mock_redis() -> AsyncMock:
    redis = AsyncMock()
    redis.get = AsyncMock(return_value=None)
    redis.set = AsyncMock()
    return redis


@pytest.fixture()
def mock_session():
    """Async context-manager session mock."""
    session = AsyncMock()
    session.__aenter__ = AsyncMock(return_value=session)
    session.__aexit__ = AsyncMock(return_value=False)
    return session


@pytest.fixture()
def mock_factory(mock_session):
    factory = MagicMock(return_value=mock_session)
    return factory


def _scalar_result(value):
    """Mock execute() result that returns a scalar."""
    result = MagicMock()
    result.scalar.return_value = value
    result.scalar_one_or_none.return_value = value
    result.scalars.return_value.all.return_value = []
    result.all.return_value = []
    return result


def _rows_result(rows):
    """Mock execute() result that returns rows."""
    result = MagicMock()
    result.all.return_value = rows
    result.scalars.return_value.all.return_value = rows
    result.scalar.return_value = len(rows)
    result.scalar_one_or_none.return_value = rows[0] if rows else None
    return result


@pytest.fixture()
def client(config, mock_user, mock_redis, mock_factory) -> TestClient:
    app = create_app(config)
    app.dependency_overrides[get_current_user] = lambda: mock_user
    app.state.redis = mock_redis
    app.state.db_session_factory = mock_factory
    app.state.db_engine = MagicMock()
    app.state.config = config
    return TestClient(app, raise_server_exceptions=False)


# ---------------------------------------------------------------------------
# Test: GET /api/meet-kevin/health
# ---------------------------------------------------------------------------


class TestMeetKevinHealth:
    def test_health_returns_required_keys(
        self, client: TestClient, mock_session: AsyncMock
    ) -> None:
        """health returns counts_by_status, daily_cost_usd, daily_cost_cap_usd."""
        # Health calls: count queries by status + daily cost sum + last_polled_at
        # Return Nones/zeros for empty DB — any 4 sequential scalar calls
        mock_session.execute = AsyncMock(
            side_effect=[
                _scalar_result(0),   # discovered count
                _scalar_result(0),   # captioned count
                _scalar_result(0),   # analyzed count
                _scalar_result(0),   # failed count
                _scalar_result(0),   # skipped count
                _scalar_result(None),  # daily cost sum
                _scalar_result(None),  # last_polled_at
                _scalar_result(None),  # daily_cost_cap_usd
            ]
        )

        resp = client.get("/api/meet-kevin/health")
        assert resp.status_code == 200, resp.text
        data = resp.json()
        assert "counts_by_status" in data
        assert "daily_cost_usd" in data
        assert "daily_cost_cap_usd" in data


# ---------------------------------------------------------------------------
# Test: GET /api/meet-kevin/videos (empty DB)
# ---------------------------------------------------------------------------


class TestMeetKevinVideos:
    def test_videos_empty_db_returns_empty_page(
        self, client: TestClient, mock_session: AsyncMock
    ) -> None:
        """GET /api/meet-kevin/videos on empty DB returns empty paginated response."""
        # Two execute calls: count query + data query
        mock_session.execute = AsyncMock(
            side_effect=[
                _scalar_result(0),   # count
                _rows_result([]),    # data rows
            ]
        )

        resp = client.get("/api/meet-kevin/videos")
        assert resp.status_code == 200, resp.text
        data = resp.json()
        assert data["videos"] == []
        assert data["total"] == 0
        assert data["page"] == 1
        assert data["per_page"] == 20


# ---------------------------------------------------------------------------
# Test: GET /api/meet-kevin/stocks (empty DB)
# ---------------------------------------------------------------------------


class TestMeetKevinStocks:
    def test_stocks_empty_db_returns_empty_list(
        self, client: TestClient, mock_session: AsyncMock
    ) -> None:
        """GET /api/meet-kevin/stocks on empty DB returns {"stocks": []}."""
        mock_session.execute = AsyncMock(
            side_effect=[
                _rows_result([]),  # aggregate query
            ]
        )

        resp = client.get("/api/meet-kevin/stocks")
        assert resp.status_code == 200, resp.text
        data = resp.json()
        assert data == {"stocks": []}