import pytest
from unittest.mock import AsyncMock, patch
from app.tools import _dispatch


@pytest.fixture
def mock_backend():
    with patch("app.tools.backend") as m:
        m.post = AsyncMock(return_value={"id": "1"})
        m.patch = AsyncMock(return_value={"id": "1"})
        m.delete = AsyncMock(return_value={})
        m.get = AsyncMock(return_value=[])
        yield m


@pytest.mark.anyio
async def test_create_node(mock_backend):
    result = await _dispatch("create_node", {"type": "server", "label": "Proxmox"})
    mock_backend.post.assert_called_once_with("/api/v1/nodes", {"type": "server", "label": "Proxmox"})
    assert result == {"id": "1"}


@pytest.mark.anyio
async def test_update_node(mock_backend):
    await _dispatch("update_node", {"id": "42", "label": "New name"})
    mock_backend.patch.assert_called_once_with("/api/v1/nodes/42", {"label": "New name"})


@pytest.mark.anyio
async def test_update_node_parent_id(mock_backend):
    await _dispatch("update_node", {"id": "42", "parent_id": "proxmox-1"})
    mock_backend.patch.assert_called_once_with("/api/v1/nodes/42", {"parent_id": "proxmox-1"})


@pytest.mark.anyio
async def test_delete_node(mock_backend):
    await _dispatch("delete_node", {"id": "42"})
    mock_backend.delete.assert_called_once_with("/api/v1/nodes/42")


@pytest.mark.anyio
async def test_create_edge(mock_backend):
    await _dispatch("create_edge", {"source": "1", "target": "2", "type": "ethernet"})
    mock_backend.post.assert_called_once_with("/api/v1/edges", {"source": "1", "target": "2", "type": "ethernet"})


@pytest.mark.anyio
async def test_delete_edge(mock_backend):
    await _dispatch("delete_edge", {"id": "99"})
    mock_backend.delete.assert_called_once_with("/api/v1/edges/99")


@pytest.mark.anyio
async def test_trigger_scan_no_ranges(mock_backend):
    await _dispatch("trigger_scan", {})
    mock_backend.post.assert_called_once_with("/api/v1/scan/trigger", {})


@pytest.mark.anyio
async def test_trigger_scan_with_ranges(mock_backend):
    await _dispatch("trigger_scan", {"ranges": ["192.168.1.0/24"]})
    mock_backend.post.assert_called_once_with("/api/v1/scan/trigger", {"ranges": ["192.168.1.0/24"]})


@pytest.mark.anyio
async def test_approve_device(mock_backend):
    await _dispatch("approve_device", {"id": "5", "type": "server", "label": "MyServer"})
    mock_backend.post.assert_called_once_with("/api/v1/scan/pending/5/approve", {"type": "server", "label": "MyServer"})


@pytest.mark.anyio
async def test_hide_device(mock_backend):
    await _dispatch("hide_device", {"id": "5"})
    mock_backend.post.assert_called_once_with("/api/v1/scan/pending/5/hide", {})


@pytest.mark.anyio
async def test_get_canvas(mock_backend):
    mock_backend.get = AsyncMock(return_value={
        "nodes": [
            {
                "id": "n1",
                "type": "router",
                "position": {"x": 100, "y": 200},
                "width": 160,
                "height": 80,
                "data": {"label": "Freebox", "ip": "192.168.1.1", "status": "online"},
            }
        ],
        "edges": [
            {"id": "e1", "source": "n1", "target": "n2", "type": "ethernet", "animated": True, "style": {"stroke": "#fff"}},
        ],
        "viewport": {"x": 0, "y": 0, "zoom": 1},
    })
    result = await _dispatch("get_canvas", {})
    mock_backend.get.assert_called_once_with("/api/v1/canvas")
    # Layout/style fields stripped, only semantic data kept
    assert result["nodes"] == [{"id": "n1", "node_type": "router", "label": "Freebox", "ip": "192.168.1.1", "status": "online"}]
    assert result["edges"] == [{"id": "e1", "source": "n1", "target": "n2", "type": "ethernet"}]
    assert "viewport" not in result


@pytest.mark.anyio
async def test_list_nodes(mock_backend):
    mock_backend.get = AsyncMock(return_value=[{"id": "1", "label": "Freebox"}])
    result = await _dispatch("list_nodes", {})
    mock_backend.get.assert_called_once_with("/api/v1/nodes")
    assert result == [{"id": "1", "label": "Freebox"}]


@pytest.mark.anyio
async def test_list_pending_devices(mock_backend):
    mock_backend.get = AsyncMock(return_value=[{"id": "p1", "ip": "192.168.1.50"}])
    result = await _dispatch("list_pending_devices", {})
    mock_backend.get.assert_called_once_with("/api/v1/scan/pending")
    assert result == [{"id": "p1", "ip": "192.168.1.50"}]


@pytest.mark.anyio
async def test_unknown_tool():
    with pytest.raises(ValueError, match="Unknown tool"):
        await _dispatch("nonexistent", {})