import json
from types import SimpleNamespace

import pytest
from typer.testing import CliRunner

from nanobot.cli.commands import _resolve_channel_default_config, app
from nanobot.config.loader import load_config, save_config

runner = CliRunner()


def test_load_config_keeps_max_tokens_and_warns_on_legacy_memory_window(tmp_path) -> None:
    config_path = tmp_path / "config.json"
    config_path.write_text(
        json.dumps(
            {
                "agents": {
                    "defaults": {
                        "maxTokens": 1234,
                        "memoryWindow": 42,
                    }
                }
            }
        ),
        encoding="utf-8",
    )

    config = load_config(config_path)

    assert config.agents.defaults.max_tokens == 1234
    assert config.agents.defaults.context_window_tokens == 65_536
    assert config.agents.defaults.should_warn_deprecated_memory_window is True


def test_save_config_writes_context_window_tokens_but_not_memory_window(tmp_path) -> None:
    config_path = tmp_path / "config.json"
    config_path.write_text(
        json.dumps(
            {
                "agents": {
                    "defaults": {
                        "maxTokens": 2222,
                        "memoryWindow": 30,
                    }
                }
            }
        ),
        encoding="utf-8",
    )

    config = load_config(config_path)
    save_config(config, config_path)
    saved = json.loads(config_path.read_text(encoding="utf-8"))
    defaults = saved["agents"]["defaults"]

    assert defaults["maxTokens"] == 2222
    assert defaults["contextWindowTokens"] == 65_536
    assert "memoryWindow" not in defaults


def test_onboard_refresh_rewrites_legacy_config_template(tmp_path, monkeypatch) -> None:
    config_path = tmp_path / "config.json"
    workspace = tmp_path / "workspace"
    config_path.write_text(
        json.dumps(
            {
                "agents": {
                    "defaults": {
                        "maxTokens": 3333,
                        "memoryWindow": 50,
                    }
                }
            }
        ),
        encoding="utf-8",
    )

    monkeypatch.setattr("nanobot.config.loader.get_config_path", lambda: config_path)
    monkeypatch.setattr("nanobot.cli.commands.get_workspace_path", lambda _workspace=None: workspace)

    result = runner.invoke(app, ["onboard"], input="n\n")

    assert result.exit_code == 0
    assert "contextWindowTokens" in result.stdout
    saved = json.loads(config_path.read_text(encoding="utf-8"))
    defaults = saved["agents"]["defaults"]
    assert defaults["maxTokens"] == 3333
    assert defaults["contextWindowTokens"] == 65_536
    assert "memoryWindow" not in defaults


def test_onboard_refresh_backfills_missing_channel_fields(tmp_path, monkeypatch) -> None:
    config_path = tmp_path / "config.json"
    workspace = tmp_path / "workspace"
    config_path.write_text(
        json.dumps(
            {
                "channels": {
                    "qq": {
                        "enabled": False,
                        "appId": "",
                        "secret": "",
                        "allowFrom": [],
                    }
                }
            }
        ),
        encoding="utf-8",
    )

    monkeypatch.setattr("nanobot.config.loader.get_config_path", lambda: config_path)
    monkeypatch.setattr("nanobot.cli.commands.get_workspace_path", lambda _workspace=None: workspace)
    monkeypatch.setattr(
        "nanobot.channels.registry.discover_all",
        lambda: {
            "qq": SimpleNamespace(
                default_config=lambda: {
                    "enabled": False,
                    "appId": "",
                    "secret": "",
                    "allowFrom": [],
                    "msgFormat": "plain",
                }
            )
        },
    )

    result = runner.invoke(app, ["onboard"], input="n\n")

    assert result.exit_code == 0
    saved = json.loads(config_path.read_text(encoding="utf-8"))
    assert saved["channels"]["qq"]["msgFormat"] == "plain"


@pytest.mark.parametrize(
    ("channel_cls", "expected"),
    [
        (SimpleNamespace(), None),
        (SimpleNamespace(default_config="invalid"), None),
        (SimpleNamespace(default_config=lambda: None), None),
        (SimpleNamespace(default_config=lambda: ["invalid"]), None),
        (SimpleNamespace(default_config=lambda: {"enabled": False}), {"enabled": False}),
    ],
)
def test_resolve_channel_default_config_validates_payload(channel_cls, expected) -> None:
    assert _resolve_channel_default_config(channel_cls) == expected


def test_resolve_channel_default_config_skips_exceptions() -> None:
    def _raise() -> dict[str, object]:
        raise RuntimeError("boom")

    assert _resolve_channel_default_config(SimpleNamespace(default_config=_raise)) is None


def test_onboard_refresh_skips_invalid_channel_default_configs(tmp_path, monkeypatch) -> None:
    config_path = tmp_path / "config.json"
    workspace = tmp_path / "workspace"
    config_path.write_text(json.dumps({"channels": {}}), encoding="utf-8")

    def _raise() -> dict[str, object]:
        raise RuntimeError("boom")

    monkeypatch.setattr("nanobot.config.loader.get_config_path", lambda: config_path)
    monkeypatch.setattr("nanobot.cli.commands.get_workspace_path", lambda _workspace=None: workspace)
    monkeypatch.setattr(
        "nanobot.channels.registry.discover_all",
        lambda: {
            "missing": SimpleNamespace(),
            "noncallable": SimpleNamespace(default_config="invalid"),
            "none": SimpleNamespace(default_config=lambda: None),
            "wrong_type": SimpleNamespace(default_config=lambda: ["invalid"]),
            "raises": SimpleNamespace(default_config=_raise),
            "qq": SimpleNamespace(
                default_config=lambda: {
                    "enabled": False,
                    "appId": "",
                    "secret": "",
                    "allowFrom": [],
                    "msgFormat": "plain",
                }
            ),
        },
    )

    result = runner.invoke(app, ["onboard"], input="n\n")

    assert result.exit_code == 0
    saved = json.loads(config_path.read_text(encoding="utf-8"))
    assert "missing" not in saved["channels"]
    assert "noncallable" not in saved["channels"]
    assert "none" not in saved["channels"]
    assert "wrong_type" not in saved["channels"]
    assert "raises" not in saved["channels"]
    assert saved["channels"]["qq"]["msgFormat"] == "plain"