"""Tests for CLI proxy env variable handling and backend validation.

Verifies that:
1. Provider target URL env vars are read by `headroom proxy`
2. litellm-* backends are accepted by both CLI and argparse paths
3. HEADROOM_WRAP_PROXY_TIMEOUT controls `headroom wrap` proxy readiness waits
"""

import os
from unittest.mock import patch

import pytest

click = pytest.importorskip("click")
pytest.importorskip("fastapi")

from click.testing import CliRunner  # noqa: E402

from headroom.cli import wrap as wrap_mod  # noqa: E402
from headroom.cli.main import main  # noqa: E402


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


class _FakeProxyProcess:
    returncode = None

    def __init__(self):
        self.killed = False

    def poll(self):
        return None

    def kill(self):
        self.killed = True


class TestCLIWrapProxyTimeout:
    """Test wrap proxy readiness timeout configuration."""

    def test_default_timeout_stays_current_without_ml_extras(self, monkeypatch):
        monkeypatch.delenv(wrap_mod._WRAP_PROXY_TIMEOUT_ENV, raising=False)
        monkeypatch.setattr(wrap_mod, "_ml_wrap_extras_detected", lambda: False)

        assert (
            wrap_mod._resolve_wrap_proxy_timeout_seconds()
            == wrap_mod._WRAP_PROXY_TIMEOUT_DEFAULT_SECONDS
        )

    def test_default_timeout_is_longer_when_ml_extras_detected(self, monkeypatch):
        monkeypatch.delenv(wrap_mod._WRAP_PROXY_TIMEOUT_ENV, raising=False)
        monkeypatch.setattr(wrap_mod, "_ml_wrap_extras_detected", lambda: True)

        assert (
            wrap_mod._resolve_wrap_proxy_timeout_seconds()
            == wrap_mod._WRAP_PROXY_TIMEOUT_ML_DEFAULT_SECONDS
        )

    def test_start_proxy_succeeds_when_ready_within_default_timeout(self, monkeypatch, tmp_path):
        fake_proc = _FakeProxyProcess()
        sleeps = []

        monkeypatch.delenv(wrap_mod._WRAP_PROXY_TIMEOUT_ENV, raising=False)
        monkeypatch.setattr(wrap_mod, "_ml_wrap_extras_detected", lambda: False)
        monkeypatch.setattr(wrap_mod, "_get_log_path", lambda: tmp_path / "proxy.log")
        monkeypatch.setattr(wrap_mod, "_check_proxy", lambda _port: True)
        monkeypatch.setattr(wrap_mod.time, "sleep", lambda seconds: sleeps.append(seconds))
        monkeypatch.setattr(wrap_mod.subprocess, "Popen", lambda *args, **kwargs: fake_proc)

        proc = wrap_mod._start_proxy(8787, agent_type="codex")

        assert proc is fake_proc
        assert sleeps == [1]
        assert fake_proc.killed is False

    def test_start_proxy_passes_resolved_copilot_api_url_to_proxy(self, monkeypatch, tmp_path):
        fake_proc = _FakeProxyProcess()
        captured: dict[str, object] = {}

        monkeypatch.delenv(wrap_mod._WRAP_PROXY_TIMEOUT_ENV, raising=False)
        monkeypatch.setattr(wrap_mod, "_ml_wrap_extras_detected", lambda: False)
        monkeypatch.setattr(wrap_mod, "_get_log_path", lambda: tmp_path / "proxy.log")
        monkeypatch.setattr(wrap_mod, "_check_proxy", lambda _port: True)
        monkeypatch.setattr(wrap_mod.time, "sleep", lambda _seconds: None)

        def fake_popen(*args, **kwargs):  # noqa: ANN002, ANN003
            captured["args"] = args
            captured["kwargs"] = kwargs
            return fake_proc

        monkeypatch.setattr(wrap_mod.subprocess, "Popen", fake_popen)

        proc = wrap_mod._start_proxy(
            8787,
            agent_type="copilot",
            openai_api_url="https://copilot-api.acme.ghe.com",
            copilot_api_token="copilot-api-token",
        )

        assert proc is fake_proc
        env = captured["kwargs"]["env"]
        assert env["OPENAI_TARGET_API_URL"] == "https://copilot-api.acme.ghe.com"
        assert env["GITHUB_COPILOT_API_URL"] == "https://copilot-api.acme.ghe.com"
        assert env["GITHUB_COPILOT_API_TOKEN"] == "copilot-api-token"

    def test_start_proxy_redirects_subprocess_stdio_to_standalone_log(self, monkeypatch, tmp_path):
        fake_proc = _FakeProxyProcess()
        captured: dict[str, object] = {}
        logs: list[str] = []

        monkeypatch.delenv(wrap_mod._WRAP_PROXY_TIMEOUT_ENV, raising=False)
        monkeypatch.setattr(wrap_mod, "_get_log_path", lambda: tmp_path / "proxy.log")
        monkeypatch.setattr(wrap_mod, "_check_proxy", lambda _port: True)
        monkeypatch.setattr(wrap_mod.time, "sleep", lambda _seconds: None)
        monkeypatch.setattr(wrap_mod, "_ml_wrap_extras_detected", lambda: False)
        monkeypatch.setattr(wrap_mod.click, "echo", lambda message: logs.append(str(message)))

        def fake_popen(*args, **kwargs):  # noqa: ANN002, ANN003
            captured["kwargs"] = kwargs
            return fake_proc

        monkeypatch.setattr(wrap_mod.subprocess, "Popen", fake_popen)

        proc = wrap_mod._start_proxy(8787, agent_type="codex")

        assert proc is fake_proc
        assert captured["kwargs"]["stdout"] is captured["kwargs"]["stderr"]
        assert captured["kwargs"]["stdout"].name == str(tmp_path / "proxy-stdio.log")
        assert captured["kwargs"]["stdout"].name != str(tmp_path / "proxy.log")
        assert f"  Logs: {tmp_path / 'proxy.log'}" in logs

    def test_env_timeout_allows_slow_start_proxy_to_succeed(self, monkeypatch, tmp_path):
        fake_proc = _FakeProxyProcess()
        sleeps = []
        checks = []

        monkeypatch.setenv(wrap_mod._WRAP_PROXY_TIMEOUT_ENV, "4")
        monkeypatch.setattr(wrap_mod, "_get_log_path", lambda: tmp_path / "proxy.log")
        monkeypatch.setattr(wrap_mod.time, "sleep", lambda seconds: sleeps.append(seconds))
        monkeypatch.setattr(wrap_mod.subprocess, "Popen", lambda *args, **kwargs: fake_proc)

        def ready_on_fourth_check(port):
            checks.append(port)
            return len(checks) == 4

        monkeypatch.setattr(wrap_mod, "_check_proxy", ready_on_fourth_check)

        proc = wrap_mod._start_proxy(8787, agent_type="codex")

        assert proc is fake_proc
        assert checks == [8787, 8787, 8787, 8787]
        assert sleeps == [1, 1, 1, 1]
        assert fake_proc.killed is False

    def test_start_proxy_tail_reads_standalone_stdio_log_on_process_exit(
        self, monkeypatch, tmp_path
    ):
        fake_proc = _FakeProxyProcess()
        fake_proc.returncode = 1
        fake_proc.poll = lambda: fake_proc.returncode

        monkeypatch.setenv(wrap_mod._WRAP_PROXY_TIMEOUT_ENV, "2")
        monkeypatch.setattr(wrap_mod, "_get_log_path", lambda: tmp_path / "proxy.log")
        monkeypatch.setattr(wrap_mod, "_check_proxy", lambda _port: False)
        monkeypatch.setattr(wrap_mod.time, "sleep", lambda _seconds: None)
        monkeypatch.setattr(wrap_mod.subprocess, "Popen", lambda *args, **kwargs: fake_proc)

        (tmp_path / "proxy.log").write_text("canonical runtime log output")
        (tmp_path / "proxy-stdio.log").write_text("proxy stdio startup output")

        with pytest.raises(RuntimeError) as excinfo:
            wrap_mod._start_proxy(8787, agent_type="codex")

        message = str(excinfo.value)
        assert "Proxy exited with code 1" in message
        assert "proxy stdio startup output" in message
        assert "canonical runtime log output" not in message

    def test_timeout_error_names_configured_timeout_and_env_var(self, monkeypatch, tmp_path):
        fake_proc = _FakeProxyProcess()

        monkeypatch.setenv(wrap_mod._WRAP_PROXY_TIMEOUT_ENV, "2")
        monkeypatch.setattr(wrap_mod, "_get_log_path", lambda: tmp_path / "proxy.log")
        monkeypatch.setattr(wrap_mod, "_check_proxy", lambda _port: False)
        monkeypatch.setattr(wrap_mod.time, "sleep", lambda _seconds: None)
        monkeypatch.setattr(wrap_mod.subprocess, "Popen", lambda *args, **kwargs: fake_proc)

        with pytest.raises(RuntimeError) as excinfo:
            wrap_mod._start_proxy(8787, agent_type="codex")

        message = str(excinfo.value)
        assert "within 2 seconds" in message
        assert wrap_mod._WRAP_PROXY_TIMEOUT_ENV in message
        assert fake_proc.killed is True


class TestCLIProxyEnvVars:
    """Test that the CLI proxy command reads API URL env vars."""

    def test_headroom_host_from_env(self, runner):
        """HEADROOM_HOST env var should be passed to ProxyConfig."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"HEADROOM_HOST": "0.0.0.0"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].host == "0.0.0.0"

    def test_headroom_port_from_env(self, runner):
        """HEADROOM_PORT env var should be passed to ProxyConfig."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"HEADROOM_PORT": "9797"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].port == 9797

    def test_headroom_min_tokens_from_env(self, runner):
        """HEADROOM_MIN_TOKENS env var should be passed to ProxyConfig."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"HEADROOM_MIN_TOKENS": "120"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].min_tokens_to_crush == 120

    def test_headroom_min_tokens_zero_is_preserved(self, runner):
        """HEADROOM_MIN_TOKENS=0 is a legitimate value ("crush everything") and
        must not be discarded by an `or 500` fallback (regression)."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"HEADROOM_MIN_TOKENS": "0", "HEADROOM_MAX_ITEMS": "0"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].min_tokens_to_crush == 0
        assert captured_config["config"].max_items_after_crush == 0

    def test_headroom_budget_from_env(self, runner):
        """HEADROOM_BUDGET env var should be passed to ProxyConfig."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"HEADROOM_BUDGET": "100.5"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].budget_limit_usd == 100.5

    def test_budget_period_flag_and_env(self, runner):
        """--budget-period and HEADROOM_BUDGET_PERIOD should reach ProxyConfig."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy", "--budget", "50", "--budget-period", "monthly"],
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].budget_period == "monthly"

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"HEADROOM_BUDGET_PERIOD": "hourly"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].budget_period == "hourly"

    def test_code_aware_enabled_from_env(self, runner):
        """HEADROOM_CODE_AWARE_ENABLED env var should be passed to ProxyConfig."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"HEADROOM_CODE_AWARE_ENABLED": "true"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].code_aware_enabled is True

    def test_code_aware_enabled_defaults_true(self, runner):
        """Without HEADROOM_CODE_AWARE_ENABLED, code-aware defaults ON (coding
        posture; consistent with the argparse server path). It degrades to a no-op
        when tree-sitter isn't installed, so defaulting it on is safe."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        env = {k: v for k, v in os.environ.items() if k != "HEADROOM_CODE_AWARE_ENABLED"}

        with (
            patch("headroom.proxy.server.run_server", mock_run_server),
            patch.dict(os.environ, env, clear=True),
        ):
            result = runner.invoke(
                main,
                ["proxy"],
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].code_aware_enabled is True

    def test_code_aware_enabled_from_cli_flag(self, runner):
        """--code-aware should enable code-aware compression in the wrapper."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(main, ["proxy", "--code-aware"], catch_exceptions=False)

        assert result.exit_code == 0, result.output
        assert captured_config["config"].code_aware_enabled is True

    def test_disable_kompress_from_env(self, runner):
        """HEADROOM_DISABLE_KOMPRESS should be passed to ProxyConfig."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"HEADROOM_DISABLE_KOMPRESS": "1"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].disable_kompress is True

    def test_disable_kompress_from_cli_flag(self, runner):
        """--disable-kompress should disable Kompress ML compression."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy", "--disable-kompress"],
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].disable_kompress is True

    def test_code_aware_flag_overrides_env_var(self, runner):
        """--code-aware should win over HEADROOM_CODE_AWARE_ENABLED=false."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy", "--code-aware"],
                env={"HEADROOM_CODE_AWARE_ENABLED": "false"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].code_aware_enabled is True

    def test_openai_target_api_url_from_env(self, runner):
        """OPENAI_TARGET_API_URL env var should be passed to ProxyConfig."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"OPENAI_TARGET_API_URL": "http://my-vllm:4000"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].openai_api_url == "http://my-vllm:4000"

    def test_gemini_target_api_url_from_env(self, runner):
        """GEMINI_TARGET_API_URL env var should be passed to ProxyConfig."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"GEMINI_TARGET_API_URL": "http://my-gemini:5000"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].gemini_api_url == "http://my-gemini:5000"

    def test_vertex_target_api_url_from_env(self, runner):
        """VERTEX_TARGET_API_URL env var should be passed to ProxyConfig."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"VERTEX_TARGET_API_URL": "https://europe-west4-aiplatform.googleapis.com"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert (
            captured_config["config"].vertex_api_url
            == "https://europe-west4-aiplatform.googleapis.com"
        )

    def test_openai_api_url_cli_flag(self, runner):
        """--openai-api-url CLI flag should take precedence."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy", "--openai-api-url", "http://from-cli:4000"],
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].openai_api_url == "http://from-cli:4000"

    def test_vertex_api_url_cli_flag(self, runner):
        """--vertex-api-url CLI flag should take precedence."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy", "--vertex-api-url", "https://us-east5-aiplatform.googleapis.com"],
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert (
            captured_config["config"].vertex_api_url == "https://us-east5-aiplatform.googleapis.com"
        )

    def test_cli_flag_overrides_env_var(self, runner):
        """CLI flag should take precedence over env var."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy", "--openai-api-url", "http://from-cli:4000"],
                env={"OPENAI_TARGET_API_URL": "http://from-env:4000"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].openai_api_url == "http://from-cli:4000"

    def test_no_env_var_defaults_to_none(self, runner):
        """Without env var or flag, openai_api_url should be None."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        # Ensure the env var is not set
        env = {k: v for k, v in os.environ.items() if k != "OPENAI_TARGET_API_URL"}

        with (
            patch("headroom.proxy.server.run_server", mock_run_server),
            patch.dict(os.environ, env, clear=True),
        ):
            result = runner.invoke(
                main,
                ["proxy"],
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].openai_api_url is None

    def test_both_api_urls_from_env(self, runner):
        """Both OPENAI and GEMINI target URLs can be set via env."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={
                    "OPENAI_TARGET_API_URL": "http://my-vllm:4000",
                    "GEMINI_TARGET_API_URL": "http://my-gemini:5000",
                },
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].openai_api_url == "http://my-vllm:4000"
        assert captured_config["config"].gemini_api_url == "http://my-gemini:5000"

    @pytest.mark.parametrize("timeout", [-1, 0, 1, 10000])
    def test_request_timeout_cli_flags(self, runner, timeout):
        """Fast-fail CLI flags should map into ProxyConfig."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy", "--request-timeout-seconds", f"{timeout}"],
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert (
            captured_config["config"].request_timeout_seconds == timeout
            if timeout and timeout > 0
            else 300
        )

    @pytest.mark.parametrize("timeout", [-1, 0, 1, 10000])
    def test_request_timeout_from_env(self, runner, timeout):
        """HEADROOM_REQUEST_TIMEOUT env var should be passed to ProxyConfig."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"HEADROOM_REQUEST_TIMEOUT": f"{timeout}"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert (
            captured_config["config"].request_timeout_seconds == timeout
            if timeout and timeout > 0
            else 300
        )

    def test_retry_and_connect_timeout_cli_flags(self, runner):
        """Fast-fail CLI flags should map into ProxyConfig."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                [
                    "proxy",
                    "--retry-max-attempts",
                    "1",
                    "--connect-timeout-seconds",
                    "3",
                ],
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].retry_max_attempts == 1
        assert captured_config["config"].connect_timeout_seconds == 3

    def test_production_scaling_env_vars(self, runner):
        captured = {}

        def mock_run_server(config, **kwargs):
            captured["config"] = config
            captured["kwargs"] = kwargs

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={
                    "HEADROOM_WORKERS": "4",
                    "HEADROOM_LIMIT_CONCURRENCY": "250",
                    "HEADROOM_MAX_CONNECTIONS": "200",
                    "HEADROOM_MAX_KEEPALIVE": "50",
                },
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured["config"].max_connections == 200
        assert captured["config"].max_keepalive_connections == 50
        # Click CLI also passes `print_banner=False` to suppress the legacy
        # run_server banner (cli/proxy.py prints its own). Assert the
        # production-scaling keys we care about, not the full kwargs dict.
        assert captured["kwargs"]["workers"] == 4
        assert captured["kwargs"]["limit_concurrency"] == 250
        assert captured["kwargs"].get("print_banner") is False

    def test_keepalive_expiry_env_var(self, runner):
        captured = {}

        def mock_run_server(config, **kwargs):
            captured["config"] = config
            captured["kwargs"] = kwargs

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"HEADROOM_KEEPALIVE_EXPIRY": "45"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured["config"].keepalive_expiry == 45.0

    def test_production_scaling_cli_flags_override_env_vars(self, runner):
        captured = {}

        def mock_run_server(config, **kwargs):
            captured["config"] = config
            captured["kwargs"] = kwargs

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                [
                    "proxy",
                    "--workers",
                    "3",
                    "--limit-concurrency",
                    "125",
                    "--max-connections",
                    "150",
                    "--max-keepalive",
                    "25",
                ],
                env={
                    "HEADROOM_WORKERS": "4",
                    "HEADROOM_LIMIT_CONCURRENCY": "250",
                    "HEADROOM_MAX_CONNECTIONS": "200",
                    "HEADROOM_MAX_KEEPALIVE": "50",
                },
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured["config"].max_connections == 150
        assert captured["config"].max_keepalive_connections == 25
        # Click CLI also passes `print_banner=False`. Assert production
        # scaling keys explicitly rather than the full kwargs dict.
        assert captured["kwargs"]["workers"] == 3
        assert captured["kwargs"]["limit_concurrency"] == 125
        assert captured["kwargs"].get("print_banner") is False


class TestCLIProxyBackend:
    """Test that litellm-* backends are accepted by the CLI."""

    def test_litellm_hosted_vllm_backend_accepted(self, runner):
        """--backend litellm-hosted_vllm should be accepted (not rejected)."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy", "--backend", "litellm-hosted_vllm"],
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].backend == "litellm-hosted_vllm"

    def test_litellm_vertex_backend_accepted(self, runner):
        """--backend litellm-vertex should be accepted."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy", "--backend", "litellm-vertex"],
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].backend == "litellm-vertex"

    def test_litellm_backend_with_openai_url(self, runner):
        """Full vLLM setup: litellm backend + OPENAI_TARGET_API_URL."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                [
                    "proxy",
                    "--backend",
                    "litellm-hosted_vllm",
                    "--openai-api-url",
                    "http://my-vllm:4000",
                ],
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].backend == "litellm-hosted_vllm"
        assert captured_config["config"].openai_api_url == "http://my-vllm:4000"


class TestCLIAnyllmProviderEnv:
    """Test that HEADROOM_ANYLLM_PROVIDER env var is read by the CLI."""

    def test_anyllm_provider_from_env(self, runner):
        """HEADROOM_ANYLLM_PROVIDER env var should override the default."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy", "--backend", "anyllm"],
                env={"HEADROOM_ANYLLM_PROVIDER": "llamacpp"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].anyllm_provider == "llamacpp"

    def test_anyllm_provider_cli_flag_works(self, runner):
        """--anyllm-provider flag should still work."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy", "--backend", "anyllm", "--anyllm-provider", "groq"],
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].anyllm_provider == "groq"


class TestCLICompressionOnlyFlags:
    """The CCR opt-out flags must flip the corresponding ProxyConfig fields.

    These enable a compression-only deployment for streaming / non-MCP clients
    that can't resolve the injected headroom_retrieve tool (issue #645).
    """

    def test_ccr_defaults_on(self, runner):
        """Without flags, all three CCR toggles stay enabled (no behavior change)."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(main, ["proxy"], catch_exceptions=False)

        assert result.exit_code == 0, result.output
        cfg = captured_config["config"]
        assert cfg.ccr_inject_tool is True
        assert cfg.ccr_inject_marker is True
        assert cfg.ccr_proactive_expansion is True

    def test_no_ccr_flag(self, runner):
        """--no-ccr disables BOTH the retrieve-tool injection and the markers."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(main, ["proxy", "--no-ccr"], catch_exceptions=False)

        assert result.exit_code == 0, result.output
        cfg = captured_config["config"]
        assert cfg.ccr_inject_tool is False
        assert cfg.ccr_inject_marker is False
        # Unrelated CCR knob stays on.
        assert cfg.ccr_proactive_expansion is True

    def test_compression_only_all_flags(self, runner):
        """--no-ccr + --no-ccr-proactive-expansion yields a compression-only config."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                [
                    "proxy",
                    "--no-ccr",
                    "--no-ccr-proactive-expansion",
                ],
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        cfg = captured_config["config"]
        assert cfg.ccr_inject_tool is False
        assert cfg.ccr_inject_marker is False
        assert cfg.ccr_proactive_expansion is False

    def test_no_ccr_from_env(self, runner):
        """HEADROOM_NO_CCR env var disables both markers and tool injection."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"HEADROOM_NO_CCR": "1"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        cfg = captured_config["config"]
        assert cfg.ccr_inject_marker is False
        assert cfg.ccr_inject_tool is False


class TestNoCcrMarkerCompressors:
    """Verify --no-ccr actually suppresses <<ccr:...>> markers
    from every compressor, not just SmartCrusher (#1022)."""

    def test_content_router_propagates_ccr_inject_marker_false_to_compressors(self):
        """#1022: ContentRouter must pass enable_ccr=False to compressors
        when ccr_inject_marker=False. Before the fix, only SmartCrusher
        received the flag — Search/Log/Diff compressors always got
        enable_ccr=True (the default)."""
        from headroom.transforms.content_router import (
            ContentRouter,
            ContentRouterConfig,
        )

        router = ContentRouter(ContentRouterConfig(ccr_inject_marker=False, ccr_enabled=True))

        # search compressor
        sc = router._get_search_compressor()
        assert sc is not None
        assert sc.config.enable_ccr is False, (
            f"SearchCompressor enable_ccr={sc.config.enable_ccr}, expected False"
        )

        # log compressor
        lc = router._get_log_compressor()
        assert lc is not None
        assert lc.config.enable_ccr is False, (
            f"LogCompressor enable_ccr={lc.config.enable_ccr}, expected False"
        )

        # diff compressor
        dc = router._get_diff_compressor()
        assert dc is not None
        assert dc.config.enable_ccr is False, (
            f"DiffCompressor enable_ccr={dc.config.enable_ccr}, expected False"
        )

        # SmartCrusher already works (regression guard)
        sc2 = router._get_smart_crusher()
        assert sc2 is not None
        # SmartCrusher uses inject_retrieval_marker, not enable_ccr

    def test_content_router_default_ccr_inject_marker_true(self):
        """Default config (ccr_inject_marker=True) should give enable_ccr=True."""
        from headroom.transforms.content_router import (
            ContentRouter,
            ContentRouterConfig,
        )

        router = ContentRouter(ContentRouterConfig())
        sc = router._get_search_compressor()
        assert sc.config.enable_ccr is True

        lc = router._get_log_compressor()
        assert lc.config.enable_ccr is True

        dc = router._get_diff_compressor()
        assert dc.config.enable_ccr is True

    def test_search_compressor_suppresses_markers_with_enable_ccr_false(self):
        """SearchCompressor with enable_ccr=False must not emit <<ccr: markers."""
        from headroom.transforms.search_compressor import (
            SearchCompressor,
            SearchCompressorConfig,
        )

        compressor = SearchCompressor(
            SearchCompressorConfig(
                enable_ccr=False,
                min_matches_for_ccr=1,
                context_keywords=["error"],
            )
        )
        content = "\n".join(
            f"src/file{i}.py:{line}: error: something went wrong here"
            for i in range(20)
            for line in range(1, 11)
        )
        result = compressor.compress(content)
        assert "<<ccr:" not in result.compressed, (
            f"SearchCompressor emitted marker when enable_ccr=False: {result.compressed[:300]!r}"
        )

    def test_log_compressor_suppresses_markers_with_enable_ccr_false(self):
        """LogCompressor with enable_ccr=False must not emit <<ccr: markers."""
        from headroom.transforms.log_compressor import (
            LogCompressor,
            LogCompressorConfig,
        )

        npm_lines = ["npm WARN deprecated x"] * 30 + ["npm ERR! something broke"] * 5
        content = "\n".join(npm_lines)
        compressor = LogCompressor(LogCompressorConfig(enable_ccr=False, min_lines_for_ccr=3))
        result = compressor.compress(content)
        assert "<<ccr:" not in result.compressed, (
            f"LogCompressor emitted marker when enable_ccr=False: {result.compressed[:300]!r}"
        )

    def test_diff_compressor_suppresses_markers_with_enable_ccr_false(self):
        """DiffCompressor with enable_ccr=False must not emit <<ccr: markers."""
        from headroom.transforms.diff_compressor import (
            DiffCompressor,
            DiffCompressorConfig,
        )

        compressor = DiffCompressor(DiffCompressorConfig(enable_ccr=False, min_lines_for_ccr=10))
        diff_lines = []
        for i in range(30):
            diff_lines.append(f"diff --git a/src/file{i}.py b/src/file{i}.py")
            diff_lines.append(f"--- a/src/file{i}.py")
            diff_lines.append(f"+++ b/src/file{i}.py")
            for line in range(1, 6):
                diff_lines.append(f"+added line {line} in file {i}")
                diff_lines.append(f"-removed line {line} in file {i}")
        content = "\n".join(diff_lines)
        result = compressor.compress(content)
        assert "<<ccr:" not in result.compressed, (
            f"DiffCompressor emitted marker when enable_ccr=False: {result.compressed[:300]!r}"
        )

    def test_code_compressor_suppresses_markers_with_enable_ccr_false(self):
        """CodeAwareCompressor with enable_ccr=False must not emit <<ccr:
        markers when tree-sitter is available (#1022 coverage gap)."""
        from headroom.transforms.code_compressor import (
            CodeAwareCompressor,
            CodeCompressorConfig,
            _check_tree_sitter_available,
        )

        if not _check_tree_sitter_available():
            pytest.skip("tree-sitter not available in this environment")

        # Code that would compress with tree-sitter (enough to trigger CCR)
        func_template = (
            "def func_{i}(x: int) -> int:\n"
            '    """Docstring for func_{i}."""\n'
            "    # Line {j}\n"
            "    result = x + {j}\n"
            "    result *= 2\n"
            "    return result\n"
        )
        content = "\n".join(func_template.format(i=i, j=j) for i in range(30) for j in range(1, 6))

        compressor = CodeAwareCompressor(
            CodeCompressorConfig(enable_ccr=False, min_tokens_for_compression=1)
        )
        result = compressor.compress(content)
        assert "<<ccr:" not in result.compressed, (
            f"CodeAwareCompressor emitted marker when enable_ccr=False: {result.compressed[:300]!r}"
        )


class TestArgparseBackendValidation:
    """Test that the argparse path (python -m headroom.proxy.server) accepts litellm-* backends."""

    def test_argparse_accepts_litellm_backend(self):
        """The argparse --backend should accept litellm-hosted_vllm (no choices restriction)."""
        import argparse

        # Recreate the parser matching server.py's main() argparse setup
        # We just need to verify argparse doesn't reject litellm-* values
        parser = argparse.ArgumentParser()
        parser.add_argument("--backend", default="anthropic")
        args = parser.parse_args(["--backend", "litellm-hosted_vllm"])
        assert args.backend == "litellm-hosted_vllm"

    def test_proxy_config_from_env_reads_disable_kompress(self):
        """The direct server env path should honor HEADROOM_DISABLE_KOMPRESS."""
        from headroom.proxy.server import _proxy_config_from_env

        with patch.dict(os.environ, {"HEADROOM_DISABLE_KOMPRESS": "1"}):
            config = _proxy_config_from_env()

        assert config.disable_kompress is True

    def test_proxy_config_from_env_reads_disable_kompress_fallback(self):
        """The direct server env path should honor HEADROOM_DISABLE_KOMPRESS_FALLBACK."""
        from headroom.proxy.server import _proxy_config_from_env

        with patch.dict(os.environ, {"HEADROOM_DISABLE_KOMPRESS_FALLBACK": "1"}):
            config = _proxy_config_from_env()

        assert config.disable_kompress_fallback is True

    def test_argparse_registers_keepalive_expiry_flag(self):
        """The argparse path (python -m headroom.proxy.server) must register
        --keepalive-expiry as a float flag, so it can override the
        HEADROOM_KEEPALIVE_EXPIRY fallback. A bad value makes argparse exit
        before the server boots, which both proves the flag exists and keeps
        the test fast.
        """
        import subprocess
        import sys

        result = subprocess.run(
            [sys.executable, "-m", "headroom.proxy.server", "--keepalive-expiry", "notafloat"],
            capture_output=True,
            text=True,
            creationflags=getattr(subprocess, "CREATE_NO_WINDOW", 0),
        )

        assert result.returncode == 2, result.stderr
        # "invalid float value" only appears if --keepalive-expiry is a registered
        # float arg; a missing flag would instead say "unrecognized arguments".
        assert "--keepalive-expiry" in result.stderr
        assert "invalid float value" in result.stderr


class TestCLIProxyExcludeToolsEnvVar:
    """HEADROOM_EXCLUDE_TOOLS and HEADROOM_TOOL_PROFILES must reach ProxyConfig via the Click path.

    Regression coverage for issue #825: the Click entrypoint (headroom/cli/proxy.py)
    previously built ProxyConfig without calling _parse_exclude_tools or
    _parse_tool_profiles, so those env vars were silently ignored for all
    shared/deployed services that launch via `headroom proxy`.
    """

    def test_exclude_tools_single_name_from_env(self, runner):
        """HEADROOM_EXCLUDE_TOOLS=WebSearch propagates to ProxyConfig.exclude_tools."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"HEADROOM_EXCLUDE_TOOLS": "WebSearch"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        cfg = captured_config["config"]
        assert cfg.exclude_tools is not None
        assert "WebSearch" in cfg.exclude_tools

    def test_exclude_tools_multi_name_from_env(self, runner):
        """HEADROOM_EXCLUDE_TOOLS=WebSearch,WebFetch yields both names (and lowercased) in result."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"HEADROOM_EXCLUDE_TOOLS": "WebSearch,WebFetch"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        cfg = captured_config["config"]
        assert cfg.exclude_tools is not None
        assert "WebSearch" in cfg.exclude_tools
        assert "WebFetch" in cfg.exclude_tools
        assert "websearch" in cfg.exclude_tools
        assert "webfetch" in cfg.exclude_tools

    def test_exclude_tools_unset_leaves_none(self, runner):
        """Without HEADROOM_EXCLUDE_TOOLS, exclude_tools stays None (DEFAULT_EXCLUDE_TOOLS used)."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        env = {k: v for k, v in os.environ.items() if k != "HEADROOM_EXCLUDE_TOOLS"}

        with (
            patch("headroom.proxy.server.run_server", mock_run_server),
            patch.dict(os.environ, env, clear=True),
        ):
            result = runner.invoke(
                main,
                ["proxy"],
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].exclude_tools is None

    def test_tool_profiles_from_env(self, runner):
        """HEADROOM_TOOL_PROFILES=Grep:conservative propagates to ProxyConfig.tool_profiles."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"HEADROOM_TOOL_PROFILES": "Grep:conservative"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        cfg = captured_config["config"]
        assert cfg.tool_profiles is not None
        assert "Grep" in cfg.tool_profiles

    def test_tool_profiles_unset_leaves_none(self, runner):
        """Without HEADROOM_TOOL_PROFILES, tool_profiles stays None."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        env = {k: v for k, v in os.environ.items() if k != "HEADROOM_TOOL_PROFILES"}

        with (
            patch("headroom.proxy.server.run_server", mock_run_server),
            patch.dict(os.environ, env, clear=True),
        ):
            result = runner.invoke(
                main,
                ["proxy"],
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].tool_profiles is None


class TestCLIProxyRpmTpm:
    """--rpm/--tpm flags and HEADROOM_RPM/HEADROOM_TPM env vars must reach ProxyConfig."""

    def test_rpm_default(self, runner):
        """Without --rpm, rate_limit_requests_per_minute defaults to 60."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(main, ["proxy"], catch_exceptions=False)

        assert result.exit_code == 0, result.output
        assert captured_config["config"].rate_limit_requests_per_minute == 60

    def test_rpm_flag(self, runner):
        """--rpm 30 should set rate_limit_requests_per_minute to 30."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(main, ["proxy", "--rpm", "30"], catch_exceptions=False)

        assert result.exit_code == 0, result.output
        assert captured_config["config"].rate_limit_requests_per_minute == 30

    def test_rpm_env_var(self, runner):
        """HEADROOM_RPM=20 should set rate_limit_requests_per_minute to 20."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"HEADROOM_RPM": "20"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].rate_limit_requests_per_minute == 20

    def test_tpm_default(self, runner):
        """Without --tpm, rate_limit_tokens_per_minute defaults to 100000."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(main, ["proxy"], catch_exceptions=False)

        assert result.exit_code == 0, result.output
        assert captured_config["config"].rate_limit_tokens_per_minute == 100000

    def test_tpm_flag(self, runner):
        """--tpm 50000 should set rate_limit_tokens_per_minute to 50000."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(main, ["proxy", "--tpm", "50000"], catch_exceptions=False)

        assert result.exit_code == 0, result.output
        assert captured_config["config"].rate_limit_tokens_per_minute == 50000

    def test_tpm_env_var(self, runner):
        """HEADROOM_TPM=80000 should set rate_limit_tokens_per_minute to 80000."""
        captured_config = {}

        def mock_run_server(config, **kwargs):
            captured_config["config"] = config

        with patch("headroom.proxy.server.run_server", mock_run_server):
            result = runner.invoke(
                main,
                ["proxy"],
                env={"HEADROOM_TPM": "80000"},
                catch_exceptions=False,
            )

        assert result.exit_code == 0, result.output
        assert captured_config["config"].rate_limit_tokens_per_minute == 80000