"""Tests for the health check router."""

import pytest
from httpx import AsyncClient

from app.models.server import ServerStatus


@pytest.mark.asyncio
async def test_health_check_returns_200_when_online(client: AsyncClient) -> None:
    """``GET /api/v1/health`` must return HTTP 200 when fail2ban is online."""
    response = await client.get("/api/v1/health")
    assert response.status_code == 200


@pytest.mark.asyncio
async def test_health_check_returns_503_when_offline(client: AsyncClient) -> None:
    """``GET /api/v1/health`` must return HTTP 503 when fail2ban is offline."""
    client._transport.app.state.server_status = ServerStatus(online=False)
    response = await client.get("/api/v1/health")
    assert response.status_code == 503


@pytest.mark.asyncio
async def test_health_check_returns_ok_status_when_online(client: AsyncClient) -> None:
    """``GET /api/v1/health`` must contain ``status: ok`` when fail2ban is online."""
    response = await client.get("/api/v1/health")
    data: dict[str, object] = response.json()
    assert data["status"] == "ok"
    assert data["fail2ban"] == "online"


@pytest.mark.asyncio
async def test_health_check_returns_unavailable_when_offline(client: AsyncClient) -> None:
    """``GET /api/v1/health`` must contain ``status: unavailable`` when fail2ban is offline."""
    client._transport.app.state.server_status = ServerStatus(online=False)
    response = await client.get("/api/v1/health")
    data: dict[str, object] = response.json()
    assert data["status"] == "unavailable"
    assert data["fail2ban"] == "offline"


@pytest.mark.asyncio
async def test_health_check_content_type_is_json(client: AsyncClient) -> None:
    """``GET /api/v1/health`` must set the ``Content-Type`` header to JSON."""
    response = await client.get("/api/v1/health")
    assert "application/json" in response.headers.get("content-type", "")


@pytest.mark.asyncio
async def test_health_check_includes_database_status(client: AsyncClient) -> None:
    """``GET /api/v1/health`` must include database status field."""
    response = await client.get("/api/v1/health")
    data: dict[str, object] = response.json()
    assert "database" in data
    assert data["database"] in ("ok", "error")


@pytest.mark.asyncio
async def test_health_check_includes_scheduler_status(client: AsyncClient) -> None:
    """``GET /api/v1/health`` must include scheduler status field."""
    response = await client.get("/api/v1/health")
    data: dict[str, object] = response.json()
    assert "scheduler" in data
    assert data["scheduler"] in ("running", "stopped", "unknown")


@pytest.mark.asyncio
async def test_health_check_includes_cache_status(client: AsyncClient) -> None:
    """``GET /api/v1/health`` must include cache status field."""
    response = await client.get("/api/v1/health")
    data: dict[str, object] = response.json()
    assert "cache" in data
    assert data["cache"] in ("initialised", "uninitialised")


@pytest.mark.asyncio
async def test_health_check_includes_components_list(client: AsyncClient) -> None:
    """``GET /api/v1/health`` must include components list."""
    response = await client.get("/api/v1/health")
    data: dict[str, object] = response.json()
    assert "components" in data
    assert isinstance(data["components"], list)


@pytest.mark.asyncio
async def test_health_check_offline_adds_fail2ban_to_components(
    client: AsyncClient,
) -> None:
    """When fail2ban is offline, it must appear in the components list."""
    client._transport.app.state.server_status = ServerStatus(online=False)
    response = await client.get("/api/v1/health")
    data: dict[str, object] = response.json()
    assert data["status"] == "unavailable"
    components: list[dict[str, object]] = data["components"]  # type: ignore[assignment]
    assert any(c.get("name") == "fail2ban" and c.get("healthy") is False for c in components)


@pytest.mark.asyncio
async def test_health_check_online_returns_empty_components(client: AsyncClient) -> None:
    """When all components are healthy, components list must be empty."""
    response = await client.get("/api/v1/health")
    data: dict[str, object] = response.json()
    assert data["status"] == "ok"
    assert data["components"] == []