import pytest

from invokeai.app.services.graph import Graph, GraphExecutionState
from invokeai.app.services.invocation_services import InvocationServices
from invokeai.app.services.invoker import Invoker

from .test_nodes import (ErrorInvocation, ImageTestInvocation,
                         PromptTestInvocation, create_edge, wait_until)


@pytest.fixture
def simple_graph():
    g = Graph()
    g.add_node(PromptTestInvocation(id = "1", prompt = "Banana sushi"))
    g.add_node(ImageTestInvocation(id = "2"))
    g.add_edge(create_edge("1", "prompt", "2", "prompt"))
    return g

@pytest.fixture()
def mock_invoker(mock_services: InvocationServices) -> Invoker:
    return Invoker(
        services = mock_services
    )

def test_can_create_graph_state(mock_invoker: Invoker):
    g = mock_invoker.create_execution_state()
    mock_invoker.stop()

    assert g is not None
    assert isinstance(g, GraphExecutionState)

def test_can_create_graph_state_from_graph(mock_invoker: Invoker, simple_graph):
    g = mock_invoker.create_execution_state(graph = simple_graph)
    mock_invoker.stop()

    assert g is not None
    assert isinstance(g, GraphExecutionState)
    assert g.graph == simple_graph

@pytest.mark.xfail(reason = "Requires fixing following the model manager refactor")
def test_can_invoke(mock_invoker: Invoker, simple_graph):
    g = mock_invoker.create_execution_state(graph = simple_graph)
    invocation_id = mock_invoker.invoke(g)
    assert invocation_id is not None

    def has_executed_any(g: GraphExecutionState):
        g = mock_invoker.services.graph_execution_manager.get(g.id)
        return len(g.executed) > 0

    wait_until(lambda: has_executed_any(g), timeout = 5, interval = 1)
    mock_invoker.stop()

    g = mock_invoker.services.graph_execution_manager.get(g.id)
    assert len(g.executed) > 0

@pytest.mark.xfail(reason = "Requires fixing following the model manager refactor")
def test_can_invoke_all(mock_invoker: Invoker, simple_graph):
    g = mock_invoker.create_execution_state(graph = simple_graph)
    invocation_id = mock_invoker.invoke(g, invoke_all = True)
    assert invocation_id is not None

    def has_executed_all(g: GraphExecutionState):
        g = mock_invoker.services.graph_execution_manager.get(g.id)
        return g.is_complete()

    wait_until(lambda: has_executed_all(g), timeout = 5, interval = 1)
    mock_invoker.stop()

    g = mock_invoker.services.graph_execution_manager.get(g.id)
    assert g.is_complete()

@pytest.mark.xfail(reason = "Requires fixing following the model manager refactor")
def test_handles_errors(mock_invoker: Invoker):
    g = mock_invoker.create_execution_state()
    g.graph.add_node(ErrorInvocation(id = "1"))

    mock_invoker.invoke(g, invoke_all=True)

    def has_executed_all(g: GraphExecutionState):
        g = mock_invoker.services.graph_execution_manager.get(g.id)
        return g.is_complete()

    wait_until(lambda: has_executed_all(g), timeout = 5, interval = 1)
    mock_invoker.stop()

    g = mock_invoker.services.graph_execution_manager.get(g.id)
    assert g.has_error()
    assert g.is_complete()

    assert all((i in g.errors for i in g.source_prepared_mapping['1']))