import importlib.util
import os
import pathlib
import unittest
from unittest.mock import patch


os.environ.setdefault("CONTROLLER_TOKEN", "x" * 48)
PATH = pathlib.Path(__file__).parents[1] / "platform/docker/profile-controller/profile_controller.py"
SPEC = importlib.util.spec_from_file_location("profile_controller", PATH)
controller = importlib.util.module_from_spec(SPEC)
assert SPEC and SPEC.loader
SPEC.loader.exec_module(controller)


def item(profile, state="exited"):
    return {
        "Id": f"id-{profile}",
        "State": state,
        "Labels": {controller.LABEL_KEY: profile},
    }


def image_item(state="exited"):
    return {"Id": "id-flux", "State": state,
            "Labels": {controller.IMAGE_LABEL_KEY: controller.IMAGE_WORKER}}


class ProfileControllerTests(unittest.TestCase):
    def test_rejects_unknown_profile_before_docker_call(self):
        with patch.object(controller, "docker_request") as request:
            with self.assertRaises(ValueError):
                controller.activate("shell")
            request.assert_not_called()

    def test_switch_stops_running_profile_then_starts_target(self):
        profiles = {name: item(name) for name in controller.ALLOWED}
        profiles["fast"] = item("fast", "running")
        calls = []

        def request(method, path):
            calls.append((method, path))
            return 204, b""

        with patch.object(controller, "containers", return_value=profiles), \
             patch.object(controller, "image_container", return_value=image_item()), \
             patch.object(controller, "docker_request", side_effect=request):
            result = controller.activate("medium")

        self.assertEqual(result, {"active_profile": "medium", "changed": True})
        self.assertEqual(calls, [
            ("POST", "/containers/id-fast/stop?t=120"),
            ("POST", "/containers/id-medium/start"),
        ])

    def test_fails_if_profile_container_is_missing(self):
        profiles = {name: item(name) for name in controller.ALLOWED[:-1]}
        with patch.object(controller, "containers", return_value=profiles), \
             patch.object(controller, "image_container", return_value=image_item()):
            with self.assertRaisesRegex(RuntimeError, "missing"):
                controller.activate("fast")

    def test_image_start_stops_inference_first(self):
        profiles = {name: item(name) for name in controller.ALLOWED}
        profiles["medium"] = item("medium", "running")
        calls = []

        def request(method, path):
            calls.append((method, path))
            return 204, b""

        with patch.object(controller, "containers", return_value=profiles), \
             patch.object(controller, "image_container", return_value=image_item()), \
             patch.object(controller, "docker_request", side_effect=request):
            controller.set_image_worker(True)
        self.assertEqual(calls, [
            ("POST", "/containers/id-medium/stop?t=120"),
            ("POST", "/containers/id-flux/start"),
        ])

    def test_profile_activation_stops_image_worker_first(self):
        profiles = {name: item(name) for name in controller.ALLOWED}
        calls = []

        def request(method, path):
            calls.append((method, path))
            return 204, b""

        with patch.object(controller, "containers", return_value=profiles), \
             patch.object(controller, "image_container",
                          return_value=image_item("running")), \
             patch.object(controller, "docker_request", side_effect=request):
            controller.activate("fast")
        self.assertEqual(calls, [
            ("POST", "/containers/id-flux/stop?t=120"),
            ("POST", "/containers/id-fast/start"),
        ])


if __name__ == "__main__":
    unittest.main()