from __future__ import annotations

import json

from synaptopus.graph import GraphEdgeSpec, GraphSchema, categorizer_node, critic_node, generator_node, policy_node
from testsupport import (
    AcceptEvenHighPolicy,
    CounterState,
    EvenCritic,
    IncrementingGenerator,
    ThresholdCategorizer,
)


def test_graph_node_specs_and_schema_are_json_safe(tmp_path) -> None:
    nodes = (
        generator_node("gen", IncrementingGenerator()),
        critic_node("crit", EvenCritic()),
        categorizer_node("cat", ThresholdCategorizer()),
        policy_node("pol", AcceptEvenHighPolicy()),
    )
    schema = GraphSchema(
        nodes=tuple(node.spec() for node in nodes),
        edges=(
            GraphEdgeSpec("gen", "candidate", "crit", "candidate"),
            GraphEdgeSpec("gen", "candidate", "cat", "candidate"),
            GraphEdgeSpec("gen", "candidate", "pol", "candidate"),
            GraphEdgeSpec("crit", "critique", "pol", "critique"),
            GraphEdgeSpec("cat", "category", "pol", "category"),
        ),
    )

    destination = tmp_path / "graph.json"
    schema.save_json(destination)
    loaded = json.loads(destination.read_text(encoding="utf-8"))

    assert loaded["artifact_type"] == "graph_schema"
    assert loaded["payload"]["nodes"][0]["node_id"] == "gen"
    assert loaded["payload"]["nodes"][0]["node_type"] == "generator"
    assert loaded["payload"]["edges"][0]["source_output"] == "candidate"