"""Unit: Docker launch step uses committed image when available (consolidated)."""

from __future__ import annotations

import contextlib
import io
import tempfile
import unittest
from collections.abc import Callable, Generator
from pathlib import Path
from typing import Any
from unittest import mock

from bot_bottle.agent_provider import AgentProvisionPlan
from bot_bottle.backend import BottleSpec
from bot_bottle.backend.docker import launch as launch_mod
from bot_bottle.backend.docker.bottle_plan import DockerBottlePlan
from bot_bottle.backend.docker.consolidated_launch import LaunchContext
from bot_bottle.egress import EgressPlan
from bot_bottle.git_gate import GitGatePlan
from bot_bottle.manifest import ManifestIndex
from tests.unit import use_bottle_root


_SLUG = "dev-abc12"
_COMMITTED_TAG = f"bot-bottle-committed-{_SLUG}:latest"
_DEFAULT_IMAGE = "bot-bottle-claude:latest"

_IDX = ManifestIndex.from_json_obj({
    "bottles": {"dev": {}},
    "agents": {"demo": {"skills": [], "prompt": "", "bottle": "dev"}},
})

_CTX = LaunchContext(
    bottle_id="b1", identity_token="t", source_ip="172.20.0.4",
    network="bot-bottle-gateway", gateway_ip="172.20.0.2",
    orchestrator_url="http://orch:8099",
)


def _plan(tmp: str) -> DockerBottlePlan:
    stage = Path(tmp)
    spec = BottleSpec(
        manifest=_IDX, agent_name="demo", copy_cwd=False, user_cwd=tmp, identity=_SLUG,
    )
    return DockerBottlePlan(
        spec=spec,
        manifest=_IDX.load_for_agent("demo"),
        stage_dir=stage,
        git_gate_plan=GitGatePlan(
            slug=_SLUG, entrypoint_script=stage / "e.sh", hook_script=stage / "h.sh",
            access_hook_script=stage / "a.sh", upstreams=(),
        ),
        egress_plan=EgressPlan(
            slug=_SLUG, routes_path=stage / "egress.yaml", routes=(), token_env_map={},
        ),
        supervise_plan=None,
        agent_provision=AgentProvisionPlan(
            template="claude", command="claude", prompt_mode="append_file",
            image=_DEFAULT_IMAGE, dockerfile="", guest_home="/home/node",
            instance_name=f"bot-bottle-{_SLUG}", prompt_file=stage / "prompt.txt",
            guest_env={},
        ),
        slug=_SLUG, forwarded_env={}, use_runsc=False,
    )


class TestLaunchCommittedImage(unittest.TestCase):
    def setUp(self) -> None:
        self._tmp = tempfile.mkdtemp(prefix="launch-committed-test.")
        self.addCleanup(lambda: __import__("shutil").rmtree(self._tmp, ignore_errors=True))
        # The launch writes the gateway CA under the bottle root — sandbox it.
        self.addCleanup(use_bottle_root(Path(self._tmp)))

    @contextlib.contextmanager
    def _patched(
        self,
        *,
        committed_tag: str | None,
        image_present: bool,
        compose: Callable[..., dict[str, Any]],
    ) -> Generator[list[str], None, None]:
        built: list[str] = []
        gw = mock.Mock()
        gw.ca_cert_pem.return_value = "-----BEGIN CERTIFICATE-----\nx\n-----END CERTIFICATE-----\n"

        def _build(image: str, ctx: str, *, dockerfile: str = "") -> None:
            del ctx, dockerfile
            built.append(image)

        with mock.patch.object(launch_mod, "read_committed_image", return_value=committed_tag), \
                mock.patch.object(launch_mod.docker_mod, "image_exists", return_value=image_present), \
                mock.patch.object(launch_mod.docker_mod, "build_image", side_effect=_build), \
                mock.patch.object(launch_mod.docker_mod, "verify_agent_image"), \
                mock.patch.object(launch_mod, "launch_consolidated", return_value=_CTX), \
                mock.patch.object(launch_mod, "teardown_consolidated"), \
                mock.patch.object(launch_mod, "DockerGateway", return_value=gw), \
                mock.patch.object(launch_mod, "consolidated_agent_compose", side_effect=compose), \
                mock.patch.object(launch_mod, "write_compose_file", return_value=Path("/tmp/c.yml")), \
                mock.patch.object(launch_mod, "compose_up"), \
                mock.patch.object(launch_mod, "compose_dump_logs"), \
                mock.patch.object(launch_mod, "compose_down"), \
                contextlib.redirect_stderr(io.StringIO()):
            yield built

    def _run_launch(
        self, plan: DockerBottlePlan, *,
        committed_tag: str | None = None, image_present: bool = True,
    ) -> list[str]:
        def compose(_p: DockerBottlePlan, **_kw: Any) -> dict[str, Any]:
            return {"services": {"agent": {}}}
        with self._patched(
            committed_tag=committed_tag, image_present=image_present, compose=compose,
        ) as built:
            with launch_mod.launch(plan, provision=mock.Mock(return_value=None)):
                pass
        return built

    def test_skips_build_when_committed_image_present(self) -> None:
        built = self._run_launch(_plan(self._tmp), committed_tag=_COMMITTED_TAG, image_present=True)
        self.assertEqual([], built)  # committed image reused, no build

    def test_uses_committed_image_in_compose_spec(self) -> None:
        captured: list[DockerBottlePlan] = []

        def compose(p: DockerBottlePlan, **_kw: Any) -> dict[str, Any]:
            captured.append(p)
            return {"services": {"agent": {}}}

        with self._patched(committed_tag=_COMMITTED_TAG, image_present=True, compose=compose):
            with launch_mod.launch(_plan(self._tmp), provision=mock.Mock(return_value=None)):
                pass
        self.assertEqual(_COMMITTED_TAG, captured[0].image)

    def test_falls_back_to_build_when_no_committed_image(self) -> None:
        self.assertEqual([_DEFAULT_IMAGE], self._run_launch(_plan(self._tmp), committed_tag=None))

    def test_falls_back_to_build_when_committed_image_missing_from_daemon(self) -> None:
        built = self._run_launch(_plan(self._tmp), committed_tag=_COMMITTED_TAG, image_present=False)
        self.assertEqual([_DEFAULT_IMAGE], built)


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