from __future__ import annotations

import unittest

from agent_builder.tools import (
    _assert_current_a2a_init_template,
    _render_a2a_init_template,
)


class TemplateInitTests(unittest.TestCase):
    def test_render_a2a_init_template_matches_sdk_starter(self) -> None:
        files = _render_a2a_init_template(
            "research-agent",
            description="Research helper",
        )

        self.assertEqual(set(files), {"agent.py", "a2a.yaml", "requirements.txt"})
        self.assertIn('name = "research-agent"', files["agent.py"])
        self.assertIn('description = "Research helper"', files["agent.py"])
        self.assertIn("LLMProvisioning.CALLER_PROVIDED", files["agent.py"])
        self.assertIn("ctx.llm", files["agent.py"])
        self.assertIn("create_deep_agent", files["agent.py"])
        self.assertIn("name: research-agent", files["a2a.yaml"])
        self.assertIn("entrypoint: agent:ResearchAgent", files["a2a.yaml"])
        self.assertIn("deepagents>=0.5.0", files["requirements.txt"])

    def test_render_a2a_init_template_rejects_invalid_names(self) -> None:
        with self.assertRaises(ValueError):
            _render_a2a_init_template("Bad Name")

    def test_stale_sdk_template_is_rejected(self) -> None:
        with self.assertRaisesRegex(RuntimeError, "stale"):
            _assert_current_a2a_init_template({
                "agent.py": "from a2a_pack import A2AAgent",
                "requirements.txt": "httpx>=0.27",
            })