"""The composition root. These tests exist because two components — the
delegation harness and the comment poller — were fully built, fully tested,
and reachable from nothing but their own tests. Unit tests that construct a
component directly cannot catch that; only assembly can."""

import sqlite3
from pathlib import Path
from typing import Any

import httpx
import pytest
from test_config import COMPLETE

from nisse_dev.agent import build_agent, prepare_workspace
from nisse_dev.config import AgentConfig
from nisse_dev.git import GitRepo


def config_for(tmp_path: Path, **overrides: str) -> AgentConfig:
    env = {
        **COMPLETE,
        "NISSE_STATE_DB": str(tmp_path / "state.db"),
        "NISSE_WORKSPACE": str(tmp_path / "work"),
        **overrides,
    }
    return AgentConfig.from_env(env)


@pytest.fixture
def origin(tmp_path: Path) -> Path:
    """A bare repo standing in for the project on the forge."""
    remote = tmp_path / "origin.git"
    GitRepo(tmp_path)._run("init", "-q", "--bare", "-b", "main", str(remote))
    seed = GitRepo(tmp_path / "seed")
    seed.init()
    seed.configure_identity("seed", "seed@test")
    (seed.root / "README.md").write_text("project\n")
    seed.commit_all("seed")
    seed.push(str(remote), "main")
    return remote


def test_workspace_is_cloned_when_absent(tmp_path: Path, origin: Path) -> None:
    config = config_for(tmp_path, NISSE_GITEA_URL=f"file://{origin}")
    # authenticated_url would mangle a file:// remote, so clone directly.
    GitRepo(tmp_path).clone(str(origin), config.workspace)
    repo = prepare_workspace(config, "nisse-dev-testing")

    assert (config.workspace / "README.md").exists()
    assert repo.current_branch() == "main"


def test_workspace_is_reused_when_already_cloned(tmp_path: Path, origin: Path) -> None:
    config = config_for(tmp_path)
    GitRepo(tmp_path).clone(str(origin), config.workspace)
    (config.workspace / "local-work.txt").write_text("in progress")

    prepare_workspace(config, "nisse-dev-testing")

    # Re-cloning would silently destroy uncommitted work.
    assert (config.workspace / "local-work.txt").exists()


class FakeTransport:
    def __init__(self) -> None:
        self.sent: list[str] = []
        self.started = False
        self.closed = False

    def send_message(self, text: str) -> None:
        self.sent.append(text)

    def send_approval_request(self, text: str) -> None:
        self.sent.append(text)

    def ask_question(self, text: str) -> None:
        self.sent.append(text)

    def on_message(self, callback: Any) -> None:
        self.callback = callback

    def start(self) -> None:
        self.started = True

    def close(self) -> None:
        self.closed = True


def build_offline(tmp_path: Path, origin: Path, monkeypatch: Any) -> Any:
    """Assemble the real graph with only the network boundaries faked."""
    config = config_for(tmp_path)
    GitRepo(tmp_path).clone(str(origin), config.workspace)

    monkeypatch.setattr(
        "nisse_dev.agent.GiteaClient.whoami", lambda self: "nisse-dev-testing"
    )
    monkeypatch.setattr("nisse_dev.agent.MatrixTransport", lambda cfg: FakeTransport())
    monkeypatch.setattr(
        "nisse_dev.agent.authenticated_url",
        lambda base, repo, user, token: str(origin),
    )
    return build_agent(config)


def test_the_whole_graph_assembles(tmp_path: Path, origin: Path, monkeypatch) -> None:
    agent = build_offline(tmp_path, origin, monkeypatch)
    orchestrator = agent.orchestrator

    # Every component that was previously unreachable is now connected.
    assert orchestrator._executor is not None
    assert orchestrator._publisher is not None
    assert orchestrator._board is not None
    assert orchestrator._delegate is not None
    assert orchestrator._poller_factory is not None
    assert orchestrator._executor._delegate is not None  # A12 escalation path
    assert orchestrator._executor._expert is not None  # A14 consult path
    agent.stop()


def test_start_announces_where_it_resumed(
    tmp_path: Path, origin: Path, monkeypatch
) -> None:
    agent = build_offline(tmp_path, origin, monkeypatch)
    agent.start()

    assert agent.transport.started
    readiness = agent.transport.sent[-1]
    assert "nisse-dev up as nisse-dev-testing" in readiness
    assert "greet" in readiness  # the project
    assert "claude-opus-5" in readiness  # the pinned planner
    agent.stop()


def test_stop_closes_everything_and_releases_the_wait(
    tmp_path: Path, origin: Path, monkeypatch
) -> None:
    agent = build_offline(tmp_path, origin, monkeypatch)
    agent.start()
    agent.stop()

    assert agent.transport.closed
    agent.wait()  # returns immediately rather than hanging
    with pytest.raises(sqlite3.ProgrammingError):
        agent.store.get_state()  # the store really is closed


def test_poller_factory_ignores_the_agents_own_comments(
    tmp_path: Path, origin: Path, monkeypatch
) -> None:
    # Without this the agent answers its own PR replies in a loop.
    agent = build_offline(tmp_path, origin, monkeypatch)
    poller = agent.orchestrator._poller_factory(lambda c: None)
    assert "nisse-dev-testing" in poller._ignore
    agent.stop()


def test_delegation_uses_the_passthrough_route(
    tmp_path: Path, origin: Path, monkeypatch
) -> None:
    # A13: delegations run vendor-native; the normalized route is for the
    # places where fidelity is cheap.
    from nisse_dev.llm import AnthropicPassthroughClient, LiteLLMClient

    agent = build_offline(tmp_path, origin, monkeypatch)
    delegation = agent.orchestrator._delegate
    assert isinstance(delegation._client, AnthropicPassthroughClient)
    assert isinstance(agent.orchestrator._executor._client, LiteLLMClient)
    agent.stop()


def test_httpx_clients_are_not_shared_between_routes(
    tmp_path: Path, origin: Path, monkeypatch
) -> None:
    agent = build_offline(tmp_path, origin, monkeypatch)
    normalized = agent.orchestrator._executor._client._http
    passthrough = agent.orchestrator._delegate._client._http
    assert isinstance(normalized, httpx.Client)
    assert normalized is not passthrough  # different base URLs and headers
    agent.stop()