# stdlib imports
import json
import os
import sys
from pathlib import Path
from typing import Final
from unittest.mock import Mock, patch

import pytest
from click.testing import CliRunner

import litellm.proxy.client.cli
from litellm._version import version as litellm_version
from litellm.proxy.client.cli import cli, litellm_proxy_cli
from litellm.proxy.client.cli.main import LITELLM_PROXY_DEPRECATION_NOTICE


@pytest.fixture
def cli_runner():
    return CliRunner()


def test_cli_version_flag(cli_runner):
    """Test that --version prints the correct version, server URL, and server version, and exits successfully"""
    with (
        patch(
            "litellm.proxy.client.health.HealthManagementClient.get_server_version",
            return_value="1.2.3",
        ),
        patch.dict(os.environ, {"LITELLM_PROXY_URL": "http://localhost:4000"}),
    ):
        result = cli_runner.invoke(cli, ["--version"])
    assert result.exit_code == 0
    assert f"LiteLLM Proxy CLI Version: {litellm_version}" in result.output
    assert "LiteLLM Proxy Server URL: http://localhost:4000" in result.output
    assert "LiteLLM Proxy Server Version: 1.2.3" in result.output


def test_cli_source_is_ascii_only():
    """Non-ASCII output (emoji, box-drawing chars) raises UnicodeEncodeError on legacy Windows
    consoles (cp1252), so the whole CLI package must stay ASCII-only."""
    cli_root = Path(litellm.proxy.client.cli.__file__).parent
    offenders = [
        f"{path.relative_to(cli_root)}:{line_number}: {line.strip()}"
        for path in sorted(cli_root.rglob("*.py"))
        for line_number, line in enumerate(path.read_text(encoding="utf-8").splitlines(), start=1)
        if not line.isascii()
    ]
    assert offenders == []


def test_base_url_trailing_slash_normalized(cli_runner):
    """A trailing slash on --base-url must not produce a double slash (e.g. '//sso/cli/start')."""
    with (
        patch("webbrowser.open"),
        patch(
            "requests.post",
            return_value=Mock(
                status_code=200,
                json=Mock(
                    return_value={
                        "login_id": "cli-test-uuid",
                        "poll_secret": "poll-secret",
                        "user_code": "ABCD-EFGH",
                    }
                ),
                raise_for_status=Mock(),
            ),
        ) as mock_post,
        patch("requests.get", side_effect=ValueError("stop after start request")),
    ):
        cli_runner.invoke(cli, ["--base-url", "https://gateway.example.com/", "login"])

    mock_post.assert_called_once_with("https://gateway.example.com/sso/cli/start", timeout=10)


def test_cli_version_command(cli_runner):
    """Test that 'version' command prints the correct version, server URL, and server version, and exits successfully"""
    with (
        patch(
            "litellm.proxy.client.health.HealthManagementClient.get_server_version",
            return_value="1.2.3",
        ),
        patch.dict(os.environ, {"LITELLM_PROXY_URL": "http://localhost:4000"}),
    ):
        result = cli_runner.invoke(cli, ["version"])
    assert result.exit_code == 0
    assert f"LiteLLM Proxy CLI Version: {litellm_version}" in result.output
    assert "LiteLLM Proxy Server URL: http://localhost:4000" in result.output
    assert "LiteLLM Proxy Server Version: 1.2.3" in result.output


@pytest.fixture
def isolated_home(monkeypatch, tmp_path):
    """Point HOME at tmp_path so tests never touch the developer's real ~/.litellm."""
    monkeypatch.setenv("HOME", str(tmp_path))
    monkeypatch.setenv("USERPROFILE", str(tmp_path))
    monkeypatch.delenv("LITELLM_PROXY_URL", raising=False)
    monkeypatch.delenv("LITELLM_PROXY_API_KEY", raising=False)
    return tmp_path


def _write_config_file(home: Path, config: dict[str, str]) -> None:
    config_dir = home / ".litellm"
    config_dir.mkdir(exist_ok=True)
    (config_dir / "config.json").write_text(json.dumps(config))


def _invoke_version(cli_runner: CliRunner, *args: str):
    with patch(
        "litellm.proxy.client.health.HealthManagementClient.get_server_version",
        return_value="1.2.3",
    ):
        return cli_runner.invoke(cli, [*args, "version"])


def test_base_url_read_from_config_file(cli_runner, isolated_home):
    """base_url precedence: flag > env > config file > default."""
    _write_config_file(isolated_home, {"base_url": "https://config-proxy.example.com"})

    result = _invoke_version(cli_runner)

    assert result.exit_code == 0
    assert "LiteLLM Proxy Server URL: https://config-proxy.example.com" in result.output


def test_env_var_beats_config_file_base_url(cli_runner, isolated_home, monkeypatch):
    _write_config_file(isolated_home, {"base_url": "https://config-proxy.example.com"})
    monkeypatch.setenv("LITELLM_PROXY_URL", "http://env-proxy.example.com:5000")

    result = _invoke_version(cli_runner)

    assert result.exit_code == 0
    assert "LiteLLM Proxy Server URL: http://env-proxy.example.com:5000" in result.output


def test_base_url_flag_beats_env_var_and_config_file(cli_runner, isolated_home, monkeypatch):
    _write_config_file(isolated_home, {"base_url": "https://config-proxy.example.com"})
    monkeypatch.setenv("LITELLM_PROXY_URL", "http://env-proxy.example.com:5000")

    result = _invoke_version(cli_runner, "--base-url", "http://flag-proxy.example.com:9000")

    assert result.exit_code == 0
    assert "LiteLLM Proxy Server URL: http://flag-proxy.example.com:9000" in result.output


def test_default_base_url_unchanged_without_config_file(cli_runner, isolated_home):
    result = _invoke_version(cli_runner)

    assert result.exit_code == 0
    assert "LiteLLM Proxy Server URL: http://localhost:4000" in result.output


def _write_login_token(home: Path, base_url: str, key: str | None) -> None:
    token_dir = home / ".litellm"
    token_dir.mkdir(exist_ok=True)
    secret: Final = {} if key is None else {"key": key}
    (token_dir / "token.json").write_text(json.dumps({"base_url": base_url, "user_id": "u-1", **secret}))


LOGIN_SERVER: Final = "https://login-gateway.example.com"
SHELL_VERSION_THEN_QUIT: Final = "version\nquit\n"


def test_bare_lite_connects_to_the_server_it_logged_in_to(cli_runner, isolated_home, requests_mock, secret_vault_factory):
    _write_login_token(isolated_home, LOGIN_SERVER, "sk-from-login")
    requests_mock.get(f"{LOGIN_SERVER}/health/readiness", json={"litellm_version": "1.2.3"})
    context: Final[dict[str, object]] = {"secret_vault": secret_vault_factory()}

    result = cli_runner.invoke(cli, [], obj=context, input=SHELL_VERSION_THEN_QUIT)

    assert f"Connected to LiteLLM server: {LOGIN_SERVER}" in result.output
    assert f"LiteLLM Proxy Server URL: {LOGIN_SERVER}" in result.output
    assert requests_mock.last_request.headers.get("Authorization") == "Bearer sk-from-login"
    assert context["base_url_explicit"] is False


def test_a_one_shot_command_never_goes_to_the_logged_in_server(
    cli_runner, isolated_home, requests_mock, secret_vault_factory
):
    _write_login_token(isolated_home, LOGIN_SERVER, "sk-from-login")
    requests_mock.get("http://localhost:4000/health/readiness", json={"litellm_version": "1.2.3"})

    result = cli_runner.invoke(cli, ["version"], obj={"secret_vault": secret_vault_factory()})

    assert result.exit_code == 0
    assert "LiteLLM Proxy Server URL: http://localhost:4000" in result.output
    assert [request.url for request in requests_mock.request_history] == ["http://localhost:4000/health/readiness"]


@pytest.mark.parametrize(
    ("args", "env", "config", "expected_base_url"),
    [
        (["--base-url", "https://flag-proxy.example.com"], {}, {}, "https://flag-proxy.example.com"),
        ([], {"LITELLM_PROXY_URL": "https://env-proxy.example.com"}, {}, "https://env-proxy.example.com"),
        ([], {}, {"base_url": "https://config-proxy.example.com"}, "https://config-proxy.example.com"),
    ],
)
def test_a_named_server_beats_the_logged_in_one_and_never_gets_its_key(
    cli_runner, isolated_home, monkeypatch, requests_mock, secret_vault_factory, args, env, config, expected_base_url
):
    _write_login_token(isolated_home, LOGIN_SERVER, "sk-from-login")
    _write_config_file(isolated_home, config)
    for name, value in env.items():
        monkeypatch.setenv(name, value)
    requests_mock.get(f"{expected_base_url}/health/readiness", json={"litellm_version": "1.2.3"})

    result = cli_runner.invoke(cli, args, obj={"secret_vault": secret_vault_factory()}, input=SHELL_VERSION_THEN_QUIT)

    assert f"Connected to LiteLLM server: {expected_base_url}" in result.output
    assert f"LiteLLM Proxy Server URL: {expected_base_url}" in result.output
    assert requests_mock.last_request.headers.get("Authorization") is None


@pytest.mark.parametrize(
    ("args", "env"),
    [
        (["--api-key", "sk-named-key"], {}),
        ([], {"LITELLM_PROXY_API_KEY": "sk-named-key"}),
    ],
)
def test_a_key_given_without_a_server_never_goes_to_the_logged_in_one(
    cli_runner, isolated_home, monkeypatch, requests_mock, secret_vault_factory, args, env
):
    _write_login_token(isolated_home, LOGIN_SERVER, "sk-from-login")
    for name, value in env.items():
        monkeypatch.setenv(name, value)
    requests_mock.get("http://localhost:4000/health/readiness", json={"litellm_version": "1.2.3"})

    result = cli_runner.invoke(cli, args, obj={"secret_vault": secret_vault_factory()}, input=SHELL_VERSION_THEN_QUIT)

    assert "Connected to LiteLLM server: http://localhost:4000" in result.output
    assert [request.url for request in requests_mock.request_history] == ["http://localhost:4000/health/readiness"]
    assert requests_mock.last_request.headers.get("Authorization") == "Bearer sk-named-key"


def test_bare_lite_says_why_it_stays_on_localhost_when_the_keychain_is_locked(
    cli_runner, isolated_home, secret_vault_factory
):
    _write_login_token(isolated_home, LOGIN_SERVER, None)

    result = cli_runner.invoke(cli, [], obj={"secret_vault": secret_vault_factory(available=False)}, input="quit\n")

    assert "Connected to LiteLLM server: http://localhost:4000" in result.output
    assert f"could not be read. Unlock it, or run 'lite --base-url {LOGIN_SERVER} login'" in result.output


def test_lite_goes_back_to_localhost_after_logout_without_a_keychain(cli_runner, isolated_home, secret_vault_factory):
    _write_login_token(isolated_home, LOGIN_SERVER, "sk-from-login")
    no_keychain: Final = secret_vault_factory(available=False)
    cli_runner.invoke(cli, ["logout"], obj={"secret_vault": no_keychain})

    result = cli_runner.invoke(cli, [], obj={"secret_vault": no_keychain}, input="quit\n")

    assert "Connected to LiteLLM server: http://localhost:4000" in result.output


def test_corrupt_config_file_falls_back_to_default(cli_runner, isolated_home):
    """A corrupt config file must never crash the CLI. Exactly one warning proves
    the config file is read once per invocation, not once per lookup."""
    config_dir = isolated_home / ".litellm"
    config_dir.mkdir(exist_ok=True)
    (config_dir / "config.json").write_text("{not json")

    result = _invoke_version(cli_runner)

    assert result.exit_code == 0
    assert "LiteLLM Proxy Server URL: http://localhost:4000" in result.output
    assert result.stderr.count("Warning: ignoring invalid config file") == 1


def test_empty_base_url_flag_is_not_treated_as_unset(cli_runner, isolated_home):
    """`--base-url ""` explicitly provided an (empty) value; falling back to the
    config file or localhost would silently redirect auth-sensitive commands."""
    _write_config_file(isolated_home, {"base_url": "https://config-proxy.example.com"})

    result = _invoke_version(cli_runner, "--base-url", "")

    assert result.exit_code == 0
    assert "LiteLLM Proxy Server URL:" not in result.output


def test_version_flag_reads_config_file_base_url(cli_runner, isolated_home):
    """--version resolves through the same precedence chain as every other command."""
    _write_config_file(isolated_home, {"base_url": "https://config-proxy.example.com"})

    with patch(
        "litellm.proxy.client.health.HealthManagementClient.get_server_version",
        return_value="1.2.3",
    ):
        result = cli_runner.invoke(cli, ["--version"])

    assert result.exit_code == 0
    assert "LiteLLM Proxy Server URL: https://config-proxy.example.com" in result.output


def test_version_flag_prefers_env_var_over_config_file(cli_runner, isolated_home, monkeypatch):
    _write_config_file(isolated_home, {"base_url": "https://config-proxy.example.com"})
    monkeypatch.setenv("LITELLM_PROXY_URL", "http://env-proxy.example.com:5000")

    with patch(
        "litellm.proxy.client.health.HealthManagementClient.get_server_version",
        return_value="1.2.3",
    ):
        result = cli_runner.invoke(cli, ["--version"])

    assert result.exit_code == 0
    assert "LiteLLM Proxy Server URL: http://env-proxy.example.com:5000" in result.output


def test_version_flag_prefers_explicit_base_url_over_config_file(cli_runner, isolated_home):
    """An eager --version could not see the flag and silently queried the config
    server instead of the one the user named."""
    _write_config_file(isolated_home, {"base_url": "https://config-proxy.example.com"})

    with patch(
        "litellm.proxy.client.health.HealthManagementClient.get_server_version",
        return_value="1.2.3",
    ):
        result = cli_runner.invoke(cli, ["--base-url", "https://flag-proxy.example.com", "--version"])

    assert result.exit_code == 0
    assert "LiteLLM Proxy Server URL: https://flag-proxy.example.com" in result.output
    assert "config-proxy.example.com" not in result.output


def test_version_flag_never_sends_api_key_to_unnamed_server(cli_runner, isolated_home, monkeypatch):
    """The version request carries a bearer token; it must reach only the server the
    user named, never whichever host happens to sit in the config file."""
    _write_config_file(isolated_home, {"base_url": "https://config-proxy.example.com"})
    monkeypatch.setenv("LITELLM_PROXY_API_KEY", "sk-intended-for-flag-proxy")

    with patch("litellm.proxy.client.http_client.requests.request") as mock_request:
        mock_request.return_value.json.return_value = {"litellm_version": "1.2.3"}
        mock_request.return_value.raise_for_status.return_value = None
        result = cli_runner.invoke(cli, ["--base-url", "https://flag-proxy.example.com", "--version"])

    assert result.exit_code == 0
    requested_urls = [call.kwargs["url"] for call in mock_request.call_args_list]
    assert requested_urls
    assert all(url.startswith("https://flag-proxy.example.com") for url in requested_urls)
    sent_keys = [call.kwargs["headers"].get("Authorization") for call in mock_request.call_args_list]
    assert sent_keys == ["Bearer sk-intended-for-flag-proxy"] * len(requested_urls)


def test_litellm_proxy_entrypoint_prints_deprecation_notice_on_stderr_and_still_runs(monkeypatch, capsys, requests_mock):
    requests_mock.get("http://localhost:4000/health/readiness", json={"litellm_version": "1.2.3"})
    monkeypatch.setattr(sys, "argv", ["litellm-proxy", "--version"])
    monkeypatch.setenv("LITELLM_PROXY_URL", "http://localhost:4000")
    with pytest.raises(SystemExit) as exit_info:
        litellm_proxy_cli()

    captured: Final = capsys.readouterr()
    assert exit_info.value.code == 0
    assert captured.err.strip() == LITELLM_PROXY_DEPRECATION_NOTICE
    assert f"LiteLLM Proxy CLI Version: {litellm_version}" in captured.out
    assert "LiteLLM Proxy Server Version: 1.2.3" in captured.out
    assert "deprecated" not in captured.out


def test_lite_entrypoint_prints_nothing_on_stderr(monkeypatch, capsys, requests_mock):
    requests_mock.get("http://localhost:4000/health/readiness", json={"litellm_version": "1.2.3"})
    monkeypatch.setattr(sys, "argv", ["lite", "--version"])
    monkeypatch.setenv("LITELLM_PROXY_URL", "http://localhost:4000")
    with pytest.raises(SystemExit) as exit_info:
        cli()

    captured: Final = capsys.readouterr()
    assert exit_info.value.code == 0
    assert "LiteLLM Proxy Server Version: 1.2.3" in captured.out
    assert f"LiteLLM Proxy CLI Version: {litellm_version}" in captured.out
    assert captured.err == ""


@pytest.mark.parametrize(
    ("args", "config", "expected_context", "expected_authorization"),
    [
        (
            ["--base-url", "https://flag-proxy.example.com/", "--api-key", "sk-flag"],
            {},
            {
                "base_url": "https://flag-proxy.example.com",
                "api_key": "sk-flag",
                "api_key_from_token_file": False,
                "base_url_explicit": True,
            },
            "Bearer sk-flag",
        ),
        (
            [],
            {},
            {
                "base_url": "http://localhost:4000",
                "api_key": None,
                "api_key_from_token_file": True,
                "base_url_explicit": False,
            },
            None,
        ),
        (
            ["--api-key", ""],
            {"base_url": "https://config-proxy.example.com"},
            {
                "base_url": "https://config-proxy.example.com",
                "api_key": "",
                "api_key_from_token_file": False,
                "base_url_explicit": True,
            },
            None,
        ),
    ],
)
def test_cli_stores_the_resolved_connection_on_the_supplied_context_object(
    cli_runner, isolated_home, requests_mock, args, config, expected_context, expected_authorization
):
    _write_config_file(isolated_home, config)
    requests_mock.get(f"{expected_context['base_url']}/health/readiness", json={"litellm_version": "1.2.3"})
    context: Final[dict[str, object]] = {}

    result = cli_runner.invoke(cli, [*args, "version"], obj=context)

    assert result.exit_code == 0
    assert json.dumps(context) == json.dumps(expected_context)
    assert "LiteLLM Proxy Server Version: 1.2.3" in result.output
    assert requests_mock.last_request.headers.get("Authorization") == expected_authorization


@pytest.mark.parametrize(
    ("context", "expected_lines", "expected_authorization"),
    [
        (
            {"base_url": "http://localhost:4000", "api_key": "sk-context"},
            ["LiteLLM Proxy Server URL: http://localhost:4000", "LiteLLM Proxy Server Version: 1.2.3"],
            "Bearer sk-context",
        ),
        (
            {"base_url": "http://localhost:4000"},
            ["LiteLLM Proxy Server URL: http://localhost:4000", "LiteLLM Proxy Server Version: 1.2.3"],
            None,
        ),
        (
            {"base_url": "http://localhost:4000", "api_key": None, "api_key_from_token_file": True},
            ["LiteLLM Proxy Server URL: http://localhost:4000", "LiteLLM Proxy Server Version: 1.2.3"],
            None,
        ),
    ],
)
def test_version_command_reads_the_connection_from_the_context_object(
    cli_runner, requests_mock, context, expected_lines, expected_authorization
):
    requests_mock.get("http://localhost:4000/health/readiness", json={"litellm_version": "1.2.3"})

    result = cli_runner.invoke(cli.commands["version"], [], obj=context)

    assert result.exit_code == 0
    assert result.output.splitlines() == [f"LiteLLM Proxy CLI Version: {litellm_version}", *expected_lines]
    assert requests_mock.last_request.headers.get("Authorization") == expected_authorization


def test_version_command_without_a_base_url_reports_the_failed_lookup(cli_runner):
    result = cli_runner.invoke(cli.commands["version"], [], obj={"api_key": "sk-context"})

    lines: Final = result.output.splitlines()
    assert result.exit_code == 0
    assert len(lines) == 2
    assert lines[0] == f"LiteLLM Proxy CLI Version: {litellm_version}"
    assert lines[1].startswith("Could not retrieve server version: ")


def test_version_command_without_a_context_object_fails_reading_it(cli_runner):
    result = cli_runner.invoke(cli.commands["version"], [])

    assert result.exit_code == 1
    assert type(result.exception) is AttributeError
    assert result.output == ""


def test_every_listed_command_runs_the_command_of_that_name():
    from litellm.proxy.client.cli.commands.agents import agent_commands

    commands: Final = {name: cli.commands[name] for name in cli.commands}

    assert {name: command.name for name, command in commands.items()} == {name: name for name in commands}
    assert {command.name for command in agent_commands()} <= commands.keys()
    assert all(cli.commands[name] is command for name, command in commands.items())