"""Tests for the ReMe CLI entry helpers."""

import asyncio
from pathlib import Path
import subprocess
import sys
from types import SimpleNamespace

import pytest

from reme.components.service import cli_service
from reme.components.service.cli_service import CliService
from reme import reme as reme_module
from reme.components.base_component import ComponentMixin
from reme.enumeration import ComponentEnum
from reme.plugin import Backend, Plugin, PluginManager


def _recording_client(seen, output="ok", base=object):
    """Build an async client stub that records construction and calls."""

    class RecordingClient(base):
        """Async client stub backed by a shared call record."""

        def __init__(self, **kwargs):
            seen["client_kwargs"] = kwargs

        async def __aenter__(self):
            return self

        async def __aexit__(self, exc_type, exc_val, exc_tb):
            return None

        async def __call__(self, action: str, **kwargs):
            seen["action"] = action
            seen["payload"] = kwargs
            yield output

    return RecordingClient


def _set_client_backend(monkeypatch, client_cls):
    monkeypatch.setattr(
        reme_module,
        "create_application_registry",
        lambda: SimpleNamespace(get=lambda component_type, backend: client_cls),
    )


def test_package_import_does_not_load_optional_core_dependencies():
    """The base package leaves optional core dependencies unloaded."""
    script = """
import importlib.abc


class BlockOptionalCoreDependencies(importlib.abc.MetaPathFinder):
    def find_spec(self, fullname, path, target=None):
        blocked = (
            "claude_agent_sdk",
            "dingtalk_stream",
            "openai_codex",
            "faiss",
            "jieba",
            "rjieba",
            "neo4j",
            "networkx",
            "pypdf",
            "polars",
            "tushare",
        )
        if any(fullname == name or fullname.startswith(f"{name}.") for name in blocked):
            raise AssertionError(f"eagerly imported optional core dependency: {fullname}")
        return None


import sys

sys.meta_path.insert(0, BlockOptionalCoreDependencies())
import reme
"""
    result = subprocess.run(
        [sys.executable, "-c", script],
        cwd=Path(__file__).resolve().parents[2],
        capture_output=True,
        text=True,
        check=False,
    )

    assert result.returncode == 0, result.stderr


def test_main_loads_env_before_calling_server(monkeypatch):
    """Client actions can resolve connection settings from the local .env."""
    events = []

    main_globals = reme_module.main.__globals__
    monkeypatch.setitem(main_globals, "load_env", lambda: events.append("load_env"))
    monkeypatch.setitem(main_globals, "parse_args", lambda *_args: ("shell", {"cmd": "pwd"}))

    async def fake_call_server(action, **kwargs):
        events.append(("call_server", action, kwargs))

    monkeypatch.setitem(main_globals, "call_server", fake_call_server)

    reme_module.main()

    assert events == ["load_env", ("call_server", "shell", {"cmd": "pwd"})]


def test_main_saves_loaded_environment_in_start_config(monkeypatch):
    """The startup config keeps the environment captured by the single global load."""
    observed = {}

    class FakeReMe:
        """Capture the fully resolved application configuration."""

        def __init__(self, **kwargs):
            """Record the application startup configuration."""
            observed["config"] = kwargs

        def run_app(self):
            """Record that application startup continued."""
            observed["ran"] = True

    main_globals = reme_module.main.__globals__
    monkeypatch.setitem(main_globals, "load_env", lambda: {"TOOL_ENV": "configured"})
    monkeypatch.setitem(main_globals, "parse_args", lambda *_args: ("start", {}))
    monkeypatch.setitem(main_globals, "prepare_start_config", lambda _kwargs: {"service": {"backend": "cli"}})
    monkeypatch.setitem(main_globals, "ReMe", FakeReMe)

    reme_module.main()

    assert observed == {
        "config": {
            "service": {"backend": "cli"},
            "environment": {"TOOL_ENV": "configured"},
        },
        "ran": True,
    }


def test_prepare_start_config_moves_unknown_start_args_to_job_args(monkeypatch):
    """``reme start job=...`` is translated into a one-shot cli service config."""

    monkeypatch.setattr(
        cli_service,
        "resolve_app_config",
        lambda **kwargs: {
            **kwargs,
            "service": {"backend": "http", "host": "127.0.0.1"},
        },
    )

    cfg = cli_service.prepare_start_config(
        {
            "config": "jinli_lme",
            "workspace_dir": "/tmp/reme",
            "job": "search",
            "query": "hello",
            "limit": 3,
        },
    )

    assert cfg["config"] == "jinli_lme"
    assert cfg["workspace_dir"] == "/tmp/reme"
    assert cfg["enable_logo"] is False
    assert cfg["log_to_console"] is False
    assert cfg["service"] == {
        "backend": "cli",
        "host": "127.0.0.1",
        "job": "search",
        "job_args": {"query": "hello", "limit": 3},
    }


def test_should_precheck_start_skips_cli_service():
    """CLI service is local execution and should not run port prechecks."""
    assert cli_service.should_precheck_start({"service": {"backend": "cli"}}) is False
    assert cli_service.should_precheck_start({"service": {"backend": "http"}}) is True


def test_cli_service_runs_configured_job_and_closes_app(capsys):
    """CLI service runs one local job through app lifecycle and prints its answer."""
    events = []

    class FakeApp:
        """Minimal app stub for exercising CliService lifecycle."""

        async def start(self):
            """Record app startup."""
            events.append("start")

        async def close(self):
            """Record app shutdown."""
            events.append("close")

        async def run_job(self, name, **kwargs):
            """Record job execution and return a successful response."""
            events.append(("run_job", name, kwargs))
            return SimpleNamespace(answer="found it", success=True, metadata={"hits": 1})

    service = CliService(job="search", job_args={"query": "hello"})

    service.start_service(FakeApp())

    assert events == [
        "start",
        ("run_job", "search", {"query": "hello"}),
        "close",
    ]
    assert capsys.readouterr().out == "found it\n"


def test_cli_service_can_print_metadata_from_service_config(capsys):
    """service.show_metadata controls optional CLI metadata output."""

    class FakeApp:
        """Minimal app stub for exercising metadata output."""

        async def start(self):
            """No-op app startup."""

        async def close(self):
            """No-op app shutdown."""

        async def run_job(self, _name, **_kwargs):
            """Return a successful response with metadata."""
            return SimpleNamespace(answer="found it", success=True, metadata={"hits": 1})

    service = CliService(job="search", show_metadata=True)

    service.start_service(FakeApp())

    assert capsys.readouterr().out == 'found it\n{"hits": 1}\n'


def test_cli_service_exits_nonzero_on_failed_response(capsys):
    """Failed local CLI jobs write to stderr and produce a failing process status."""
    events = []

    class FakeApp:
        """Minimal app stub for exercising failure handling."""

        async def start(self):
            """Record app startup."""
            events.append("start")

        async def close(self):
            """Record app shutdown."""
            events.append("close")

        async def run_job(self, name, **kwargs):
            """Record job execution and return a failed response."""
            events.append(("run_job", name, kwargs))
            return SimpleNamespace(answer="boom", success=False, metadata={})

    service = CliService(job="search", job_args={"query": "hello"})

    with pytest.raises(SystemExit) as exc_info:
        service.start_service(FakeApp())

    assert exc_info.value.code == 1
    assert events == [
        "start",
        ("run_job", "search", {"query": "hello"}),
        "close",
    ]
    captured = capsys.readouterr()
    assert captured.out == ""
    assert captured.err == "boom\n"


def test_call_server_passes_client_kwargs_to_client(monkeypatch, capsys):
    """CLI helper forwards connection options to the selected client."""
    seen = {}
    _set_client_backend(monkeypatch, _recording_client(seen))
    monkeypatch.setattr(reme_module, "running_app_config", lambda: None)

    async def run():
        await reme_module.call_server(
            "search",
            backend="http",
            host="127.0.0.2",
            port=2444,
            timeout=1.5,
            query="hello",
        )

    asyncio.run(run())

    assert seen["client_kwargs"] == {"host": "127.0.0.2", "port": 2444, "timeout": 1.5}
    assert seen["action"] == "search"
    assert seen["payload"] == {"query": "hello"}
    assert capsys.readouterr().out == "ok\n"


def test_call_server_treats_show_metadata_as_client_kwarg(monkeypatch, capsys):
    """show_metadata controls client display and is not sent as a tool argument."""
    seen = {}
    _set_client_backend(monkeypatch, _recording_client(seen))
    monkeypatch.setattr(reme_module, "running_app_config", lambda: None)

    async def run():
        await reme_module.call_server("version", backend="http", show_metadata=True)

    asyncio.run(run())

    assert seen["client_kwargs"] == {"show_metadata": True}
    assert seen["action"] == "version"
    assert seen["payload"] == {}
    assert capsys.readouterr().out == "ok\n"


def test_call_server_passes_shell_parameters_as_payload(monkeypatch, capsys):
    """Shell-specific parameter names do not collide with client options."""
    seen = {}
    _set_client_backend(monkeypatch, _recording_client(seen))
    monkeypatch.setattr(reme_module, "running_app_config", lambda: None)

    async def run():
        await reme_module.call_server("shell", backend="http", cmd="ls", shell_timeout=5)

    asyncio.run(run())

    assert seen["action"] == "shell"
    assert seen["payload"] == {"cmd": "ls", "shell_timeout": 5}
    assert capsys.readouterr().out == "ok\n"


def test_call_server_uses_running_plugins_and_their_service_defaults(monkeypatch, capsys):
    """A bare client call can load the Client backend enabled by the running app."""
    seen = {}
    plugin_client = _recording_client(seen, output="plugin-ok", base=ComponentMixin)
    plugin_client.component_type = ComponentEnum.CLIENT

    manager = PluginManager(
        [
            Plugin(
                name="example",
                backends=(Backend("plugin-client", plugin_client),),
                config={
                    "service": {
                        "backend": "plugin-client",
                        "host": "127.0.0.9",
                        "port": 9911,
                    },
                },
            ),
        ],
    )
    monkeypatch.setattr(
        reme_module,
        "resolve_app_config",
        lambda **_kwargs: {"service": {"backend": "http"}},
    )
    monkeypatch.setattr(reme_module, "running_app_config", lambda: {"plugins": ["example"]})
    monkeypatch.setattr(reme_module.PluginManager, "discover", lambda _specs: manager)

    asyncio.run(reme_module.call_server("search", query="hello"))

    assert seen["client_kwargs"]["host"] == "127.0.0.9"
    assert seen["client_kwargs"]["port"] == 9911
    assert seen["action"] == "search"
    assert seen["payload"] == {"query": "hello"}
    assert capsys.readouterr().out == "plugin-ok\n"


def test_call_server_skips_local_fallback_when_server_is_running(monkeypatch, capsys):
    """A usable running config prevents eager parsing of the local fallback."""
    seen = {}
    _set_client_backend(monkeypatch, _recording_client(seen))
    monkeypatch.setattr(reme_module, "running_app_config", lambda: {"service": {"backend": "http"}})

    def fail_local_resolution(**_kwargs):
        raise AssertionError("local fallback should not be resolved")

    monkeypatch.setattr(reme_module, "resolve_app_config", fail_local_resolution)

    asyncio.run(reme_module.call_server("version"))

    assert seen["action"] == "version"
    assert seen["payload"] == {}
    assert capsys.readouterr().out == "ok\n"