import os
from datetime import datetime, timedelta

import pytest
from dotenv import load_dotenv

from core.edges import EntityEdge
from core.llm_client import LLMConfig, OpenAIClient
from core.nodes import EntityNode
from core.utils.maintenance.temporal_operations import (
	invalidate_edges,
)

load_dotenv()


def setup_llm_client():
	return OpenAIClient(
		LLMConfig(
			api_key=os.getenv('TEST_OPENAI_API_KEY'),
			model=os.getenv('TEST_OPENAI_MODEL'),
			base_url='https://api.openai.com/v1',
		)
	)


# Helper function to create test data
def create_test_data():
	now = datetime.now()

	# Create nodes
	node1 = EntityNode(uuid='1', name='Alice', labels=['Person'], created_at=now)
	node2 = EntityNode(uuid='2', name='Bob', labels=['Person'], created_at=now)

	# Create edges
	edge1 = EntityEdge(
		uuid='e1',
		source_node_uuid='1',
		target_node_uuid='2',
		name='LIKES',
		fact='Alice likes Bob',
		created_at=now - timedelta(days=1),
	)
	edge2 = EntityEdge(
		uuid='e2',
		source_node_uuid='1',
		target_node_uuid='2',
		name='DISLIKES',
		fact='Alice dislikes Bob',
		created_at=now,
	)

	existing_edge = (node1, edge1, node2)
	new_edge = (node1, edge2, node2)

	return existing_edge, new_edge


@pytest.mark.asyncio
@pytest.mark.integration
async def test_invalidate_edges():
	existing_edge, new_edge = create_test_data()

	invalidated_edges = await invalidate_edges(setup_llm_client(), [existing_edge], [new_edge])

	assert len(invalidated_edges) == 1
	assert invalidated_edges[0].uuid == existing_edge[1].uuid
	assert invalidated_edges[0].expired_at is not None


@pytest.mark.asyncio
@pytest.mark.integration
async def test_invalidate_edges_no_invalidation():
	existing_edge, _ = create_test_data()

	invalidated_edges = await invalidate_edges(setup_llm_client(), [existing_edge], [])

	assert len(invalidated_edges) == 0


@pytest.mark.asyncio
@pytest.mark.integration
async def test_invalidate_edges_multiple_existing():
	existing_edge1, new_edge = create_test_data()
	existing_edge2, _ = create_test_data()
	existing_edge2[1].uuid = 'e3'
	existing_edge2[1].name = 'KNOWS'
	existing_edge2[1].fact = 'Alice knows Bob'

	invalidated_edges = await invalidate_edges(
		setup_llm_client(), [existing_edge1, existing_edge2], [new_edge]
	)

	assert len(invalidated_edges) == 1
	assert invalidated_edges[0].uuid == existing_edge1[1].uuid
	assert invalidated_edges[0].expired_at is not None


# Helper function to create more complex test data
def create_complex_test_data():
	now = datetime.now()

	# Create nodes
	node1 = EntityNode(uuid='1', name='Alice', labels=['Person'], created_at=now)
	node2 = EntityNode(uuid='2', name='Bob', labels=['Person'], created_at=now)
	node3 = EntityNode(uuid='3', name='Charlie', labels=['Person'], created_at=now)
	node4 = EntityNode(uuid='4', name='Company XYZ', labels=['Organization'], created_at=now)

	# Create edges
	edge1 = EntityEdge(
		uuid='e1',
		source_node_uuid='1',
		target_node_uuid='2',
		name='LIKES',
		fact='Alice likes Bob',
		created_at=now - timedelta(days=5),
	)
	edge2 = EntityEdge(
		uuid='e2',
		source_node_uuid='1',
		target_node_uuid='3',
		name='FRIENDS_WITH',
		fact='Alice is friends with Charlie',
		created_at=now - timedelta(days=3),
	)
	edge3 = EntityEdge(
		uuid='e3',
		source_node_uuid='2',
		target_node_uuid='4',
		name='WORKS_FOR',
		fact='Bob works for Company XYZ',
		created_at=now - timedelta(days=2),
	)

	existing_edge1 = (node1, edge1, node2)
	existing_edge2 = (node1, edge2, node3)
	existing_edge3 = (node2, edge3, node4)

	return [existing_edge1, existing_edge2, existing_edge3], [
		node1,
		node2,
		node3,
		node4,
	]


@pytest.mark.asyncio
@pytest.mark.integration
async def test_invalidate_edges_complex():
	existing_edges, nodes = create_complex_test_data()

	# Create a new edge that contradicts an existing one
	new_edge = (
		nodes[0],
		EntityEdge(
			uuid='e4',
			source_node_uuid='1',
			target_node_uuid='2',
			name='DISLIKES',
			fact='Alice dislikes Bob',
			created_at=datetime.now(),
		),
		nodes[1],
	)

	invalidated_edges = await invalidate_edges(setup_llm_client(), existing_edges, [new_edge])

	assert len(invalidated_edges) == 1
	assert invalidated_edges[0].uuid == 'e1'
	assert invalidated_edges[0].expired_at is not None


@pytest.mark.asyncio
@pytest.mark.integration
async def test_invalidate_edges_temporal_update():
	existing_edges, nodes = create_complex_test_data()

	# Create a new edge that updates an existing one with new information
	new_edge = (
		nodes[1],
		EntityEdge(
			uuid='e5',
			source_node_uuid='2',
			target_node_uuid='4',
			name='LEFT_JOB',
			fact='Bob left his job at Company XYZ',
			created_at=datetime.now(),
		),
		nodes[3],
	)

	invalidated_edges = await invalidate_edges(setup_llm_client(), existing_edges, [new_edge])

	assert len(invalidated_edges) == 1
	assert invalidated_edges[0].uuid == 'e3'
	assert invalidated_edges[0].expired_at is not None


@pytest.mark.asyncio
@pytest.mark.integration
async def test_invalidate_edges_multiple_invalidations():
	existing_edges, nodes = create_complex_test_data()

	# Create new edges that invalidate multiple existing edges
	new_edge1 = (
		nodes[0],
		EntityEdge(
			uuid='e6',
			source_node_uuid='1',
			target_node_uuid='2',
			name='ENEMIES_WITH',
			fact='Alice and Bob are now enemies',
			created_at=datetime.now(),
		),
		nodes[1],
	)
	new_edge2 = (
		nodes[0],
		EntityEdge(
			uuid='e7',
			source_node_uuid='1',
			target_node_uuid='3',
			name='ENDED_FRIENDSHIP',
			fact='Alice ended her friendship with Charlie',
			created_at=datetime.now(),
		),
		nodes[2],
	)

	invalidated_edges = await invalidate_edges(
		setup_llm_client(), existing_edges, [new_edge1, new_edge2]
	)

	assert len(invalidated_edges) == 2
	assert set(edge.uuid for edge in invalidated_edges) == {'e1', 'e2'}
	for edge in invalidated_edges:
		assert edge.expired_at is not None


@pytest.mark.asyncio
@pytest.mark.integration
async def test_invalidate_edges_no_effect():
	existing_edges, nodes = create_complex_test_data()

	# Create a new edge that doesn't invalidate any existing edges
	new_edge = (
		nodes[2],
		EntityEdge(
			uuid='e8',
			source_node_uuid='3',
			target_node_uuid='4',
			name='APPLIED_TO',
			fact='Charlie applied to Company XYZ',
			created_at=datetime.now(),
		),
		nodes[3],
	)

	invalidated_edges = await invalidate_edges(setup_llm_client(), existing_edges, [new_edge])

	assert len(invalidated_edges) == 0


@pytest.mark.asyncio
@pytest.mark.integration
async def test_invalidate_edges_partial_update():
	existing_edges, nodes = create_complex_test_data()

	# Create a new edge that partially updates an existing one
	new_edge = (
		nodes[1],
		EntityEdge(
			uuid='e9',
			source_node_uuid='2',
			target_node_uuid='4',
			name='CHANGED_POSITION',
			fact='Bob changed his position at Company XYZ',
			created_at=datetime.now(),
		),
		nodes[3],
	)

	invalidated_edges = await invalidate_edges(setup_llm_client(), existing_edges, [new_edge])

	assert len(invalidated_edges) == 0  # The existing edge is not invalidated, just updated


@pytest.mark.asyncio
@pytest.mark.integration
async def test_invalidate_edges_empty_inputs():
	invalidated_edges = await invalidate_edges(setup_llm_client(), [], [])

	assert len(invalidated_edges) == 0