"""Unit: commit_container helper in
bot_bottle.backend.docker.util (PRD 0023 chunk 4c additions).

Tests mock `subprocess.run` and assert on argv shape + parsing.
The actual docker round-trip is covered by the chunk 4c
integration smoke."""

from __future__ import annotations

import subprocess
import unittest
from unittest.mock import patch

from bot_bottle.backend.docker import util as docker_mod


def _ok(stdout: str = "", stderr: str = "") -> subprocess.CompletedProcess:  # type: ignore
    return subprocess.CompletedProcess(
        args=[], returncode=0, stdout=stdout, stderr=stderr,
    )


def _fail(stderr: str = "boom") -> subprocess.CompletedProcess:  # type: ignore
    return subprocess.CompletedProcess(
        args=[], returncode=1, stdout="", stderr=stderr,
    )


class TestCommitContainer(unittest.TestCase):
    def test_runs_docker_commit(self):
        with patch.object(
            docker_mod.subprocess, "run", return_value=_ok(),
        ) as run, patch.object(docker_mod, "info"):
            docker_mod.commit_container(
                "bot-bottle-dev-abc12",
                "bot-bottle-committed-dev-abc12:latest",
            )
        argv = run.call_args.args[0]
        self.assertEqual(
            [
                "docker", "commit",
                "bot-bottle-dev-abc12",
                "bot-bottle-committed-dev-abc12:latest",
            ],
            argv,
        )

    def test_dies_on_docker_commit_failure(self):
        with patch.object(
            docker_mod.subprocess, "run", return_value=_fail("No such container"),
        ), patch.object(
            docker_mod, "die", side_effect=SystemExit("die"),
        ) as die:
            with self.assertRaises(SystemExit):
                docker_mod.commit_container("missing-container", "some:tag")
        die.assert_called_once()
        self.assertIn("missing-container", die.call_args.args[0])

    def test_die_message_includes_image_tag(self):
        with patch.object(
            docker_mod.subprocess, "run", return_value=_fail("boom"),
        ), patch.object(
            docker_mod, "die", side_effect=SystemExit("die"),
        ) as die:
            with self.assertRaises(SystemExit):
                docker_mod.commit_container("ctr", "my-tag:v1")
        self.assertIn("my-tag:v1", die.call_args.args[0])


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