"""Tests for tool error detection."""

from __future__ import annotations

from supply_agent.tools.base import tool
from supply_agent.tools.errors import content_indicates_error
from supply_agent.tools.registry import ToolRegistry


def test_content_indicates_error_truthy_error_field() -> None:
    assert content_indicates_error('{"error": "boom"}')
    assert content_indicates_error('{\n  "error": "boom",\n  "title": "x"\n}')


def test_content_indicates_error_ignores_null_or_missing() -> None:
    assert not content_indicates_error('{"error": null, "ok": true}')
    assert not content_indicates_error('{"error": "", "ok": true}')
    assert not content_indicates_error('{"ok": true}')
    assert not content_indicates_error("plain text success")
    assert not content_indicates_error('["not", "an", "object"]')


def test_content_indicates_error_does_not_use_prefix_heuristic() -> None:
    # Would be true under startswith('{"error"'), but is a success payload.
    assert not content_indicates_error('{"error_code": 0, "message": "ok"}')


def test_registry_execute_sets_is_error_from_json() -> None:
    registry = ToolRegistry()

    @tool(name="fail")
    def fail() -> str:
        return '{\n  "error": "bad args",\n  "input_error": true\n}'

    @tool(name="ok")
    def ok() -> str:
        return '{"error": null, "items": []}'

    registry.register(fail, name="fail")
    registry.register(ok, name="ok")

    assert registry.execute("1", "fail", "{}").is_error is True
    assert registry.execute("2", "ok", "{}").is_error is False
    assert registry.execute("3", "missing", "{}").is_error is True