"""Tests for config/settings.py and config/nim.py"""

from typing import Any, cast

import pytest
from pydantic import ValidationError

from free_claude_code.config.constants import (
    ANTHROPIC_DEFAULT_MAX_OUTPUT_TOKENS,
    HTTP_CONNECT_TIMEOUT_DEFAULT,
)
from free_claude_code.config.env_files import (
    ANTHROPIC_AUTH_TOKEN_ENV,
    process_env_key_is_effective,
)
from free_claude_code.config.model_refs import (
    configured_chat_model_refs,
    parse_model_name,
    parse_provider_type,
)
from free_claude_code.config.nim import NimSettings
from free_claude_code.config.paths import messaging_state_dir_path
from free_claude_code.config.reasoning import ReasoningPreference


class TestSettings:
    """Test Settings configuration."""

    def test_settings_loads(self):
        """Ensure Settings can be instantiated."""
        from free_claude_code.config.settings import Settings

        settings = Settings()
        assert settings is not None

    def test_default_values(self, monkeypatch):
        """Test default values are set and have correct types."""
        from free_claude_code.config.settings import Settings

        monkeypatch.delenv("CLAUDE_WORKSPACE", raising=False)
        monkeypatch.delenv("MODEL", raising=False)
        monkeypatch.delenv("VERTEX_LOCATION", raising=False)
        monkeypatch.delenv("HTTP_READ_TIMEOUT", raising=False)
        monkeypatch.delenv("HTTP_CONNECT_TIMEOUT", raising=False)
        monkeypatch.setitem(Settings.model_config, "env_file", ())
        settings = Settings()
        assert settings.model == "nvidia_nim/nvidia/nemotron-3-super-120b-a12b"
        assert isinstance(settings.provider_rate_limit, int)
        assert isinstance(settings.provider_rate_window, int)
        assert isinstance(settings.nim.temperature, float)
        assert isinstance(settings.fast_prefix_detection, bool)
        assert settings.reasoning_policy is ReasoningPreference.CLIENT
        assert settings.http_read_timeout == 120.0
        assert settings.http_connect_timeout == HTTP_CONNECT_TIMEOUT_DEFAULT
        assert settings.enable_web_server_tools is False
        assert settings.log_raw_api_payloads is False
        assert settings.log_raw_sse_events is False
        assert settings.debug_platform_edits is False
        assert settings.debug_subagent_stack is False
        assert settings.log_level == "INFO"
        assert settings.open_admin_browser is True
        assert settings.vertex_location == "global"

    def test_open_admin_browser_loads_from_environment(self, monkeypatch):
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("FCC_OPEN_BROWSER", "false")
        monkeypatch.setitem(Settings.model_config, "env_file", ())

        assert Settings().open_admin_browser is False

    def test_default_claude_workspace_uses_fcc_home(self, monkeypatch, tmp_path):
        """Unset CLAUDE_WORKSPACE stores agent data under the fixed path helper."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("HOME", str(tmp_path))
        monkeypatch.setenv("USERPROFILE", str(tmp_path))
        monkeypatch.delenv("CLAUDE_WORKSPACE", raising=False)
        monkeypatch.setitem(Settings.model_config, "env_file", ())

        settings = Settings()

        assert messaging_state_dir_path() == tmp_path / ".fcc" / "agent_workspace"
        assert not hasattr(settings, "claude_workspace")

    def test_server_log_path_uses_fcc_home(self, monkeypatch, tmp_path):
        """The server log location is fixed under ~/.fcc."""
        from free_claude_code.config.paths import server_log_path

        monkeypatch.setenv("HOME", str(tmp_path))
        monkeypatch.setenv("USERPROFILE", str(tmp_path))

        assert server_log_path() == tmp_path / ".fcc" / "logs" / "server.log"

    def test_removed_log_file_env_is_ignored(self, monkeypatch):
        """Legacy LOG_FILE values do not affect Settings or block startup."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("LOG_FILE", "custom/server.log")
        monkeypatch.setitem(Settings.model_config, "env_file", ())

        settings = Settings()

        assert not hasattr(settings, "log_file")

    def test_stale_zai_base_url_env_is_ignored(self, monkeypatch):
        """Cloud Z.ai endpoint is fixed in provider metadata, not settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("ZAI_BASE_URL", "https://custom.zai.invalid/v1")
        monkeypatch.setitem(Settings.model_config, "env_file", ())

        settings = Settings()

        assert not hasattr(settings, "zai_base_url")

    def test_blank_claude_workspace_uses_fcc_home(self, monkeypatch, tmp_path):
        """An explicit blank env value does not affect the fixed workspace helper."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("HOME", str(tmp_path))
        monkeypatch.setenv("USERPROFILE", str(tmp_path))
        monkeypatch.setenv("CLAUDE_WORKSPACE", "")
        monkeypatch.setitem(Settings.model_config, "env_file", ())

        settings = Settings()

        assert messaging_state_dir_path() == tmp_path / ".fcc" / "agent_workspace"
        assert not hasattr(settings, "claude_workspace")

    def test_explicit_claude_workspace_is_ignored(self, monkeypatch, tmp_path):
        """Custom CLAUDE_WORKSPACE values do not override the fixed workspace helper."""
        from free_claude_code.config.settings import Settings

        workspace = tmp_path / "custom-workspace"
        monkeypatch.setenv("HOME", str(tmp_path))
        monkeypatch.setenv("USERPROFILE", str(tmp_path))
        monkeypatch.setenv("CLAUDE_WORKSPACE", str(workspace))
        monkeypatch.setitem(Settings.model_config, "env_file", ())

        settings = Settings()

        assert messaging_state_dir_path() == tmp_path / ".fcc" / "agent_workspace"
        assert not hasattr(settings, "claude_workspace")

    def test_explicit_claude_cli_bin_is_ignored(self, monkeypatch):
        """Custom CLAUDE_CLI_BIN values do not become Settings fields."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("CLAUDE_CLI_BIN", "claude-custom")
        monkeypatch.setitem(Settings.model_config, "env_file", ())

        settings = Settings()

        assert not hasattr(settings, "claude_cli_bin")
        assert not hasattr(settings, "codex_cli_bin")

    def test_direct_claude_runtime_overrides_are_ignored(self, monkeypatch, tmp_path):
        """Constructor extras cannot add fixed Claude runtime settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("HOME", str(tmp_path))
        monkeypatch.setenv("USERPROFILE", str(tmp_path))
        monkeypatch.setitem(Settings.model_config, "env_file", ())

        settings = Settings(
            **cast(
                Any,
                {
                    "claude_workspace": str(tmp_path / "custom-workspace"),
                    "claude_cli_bin": "claude-custom",
                },
            )
        )

        assert messaging_state_dir_path() == tmp_path / ".fcc" / "agent_workspace"
        assert not hasattr(settings, "claude_workspace")
        assert not hasattr(settings, "claude_cli_bin")

    def test_get_settings_cached(self):
        """Test get_settings returns cached instance."""
        from free_claude_code.config.settings import get_settings

        s1 = get_settings()
        s2 = get_settings()
        assert s1 is s2  # Same object (cached)

    def test_empty_string_to_none_for_optional_int(self):
        """Test that empty string converts to None for optional int fields."""
        from free_claude_code.config.settings import Settings

        # Settings should handle NVIDIA_NIM_SEED="" gracefully
        settings = Settings()
        assert settings.nim.seed is None or isinstance(settings.nim.seed, int)

    def test_model_setting(self):
        """Test model setting exists and is a string."""
        from free_claude_code.config.settings import Settings

        settings = Settings()
        assert isinstance(settings.model, str)
        assert len(settings.model) > 0

    def test_base_url_constant(self):
        """Test NVIDIA_NIM_DEFAULT_BASE is a constant."""
        from free_claude_code.config.provider_catalog import NVIDIA_NIM_DEFAULT_BASE

        assert NVIDIA_NIM_DEFAULT_BASE == "https://integrate.api.nvidia.com/v1"

    def test_lm_studio_base_url_from_env(self, monkeypatch):
        """LM_STUDIO_BASE_URL env var is loaded into settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("LM_STUDIO_BASE_URL", "http://custom:5678/v1")
        settings = Settings()
        assert settings.lm_studio_base_url == "http://custom:5678/v1"

    def test_ollama_base_url_defaults_to_root(self, monkeypatch):
        """OLLAMA_BASE_URL keeps the customer-facing Ollama root default."""
        from free_claude_code.config.settings import Settings

        monkeypatch.delenv("OLLAMA_BASE_URL", raising=False)
        monkeypatch.setitem(Settings.model_config, "env_file", ())
        settings = Settings()
        assert settings.ollama_base_url == "http://localhost:11434"

    def test_ollama_base_url_accepts_v1_suffix(self, monkeypatch):
        """The adapter accepts either the root URL or the explicit OpenAI path."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("OLLAMA_BASE_URL", "http://localhost:11434/v1")
        assert Settings().ollama_base_url == "http://localhost:11434/v1"

    def test_ollama_cloud_api_key_from_env(self, monkeypatch):
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("OLLAMA_API_KEY", "ollama-cloud-key")

        assert Settings().ollama_api_key == "ollama-cloud-key"

    def test_provider_rate_limit_from_env(self, monkeypatch):
        """PROVIDER_RATE_LIMIT env var is loaded into settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("PROVIDER_RATE_LIMIT", "20")
        settings = Settings()
        assert settings.provider_rate_limit == 20

    def test_provider_rate_window_from_env(self, monkeypatch):
        """PROVIDER_RATE_WINDOW env var is loaded into settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("PROVIDER_RATE_WINDOW", "30")
        settings = Settings()
        assert settings.provider_rate_window == 30

    def test_http_read_timeout_from_env(self, monkeypatch):
        """HTTP_READ_TIMEOUT env var is loaded into settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("HTTP_READ_TIMEOUT", "600")
        settings = Settings()
        assert settings.http_read_timeout == 600.0

    def test_http_write_timeout_from_env(self, monkeypatch):
        """HTTP_WRITE_TIMEOUT env var is loaded into settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("HTTP_WRITE_TIMEOUT", "20")
        settings = Settings()
        assert settings.http_write_timeout == 20.0

    def test_http_connect_timeout_from_env(self, monkeypatch):
        """HTTP_CONNECT_TIMEOUT env var is loaded into settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("HTTP_CONNECT_TIMEOUT", "5")
        settings = Settings()
        assert settings.http_connect_timeout == 5.0

    def test_http_connect_timeout_default_matches_shared_constant(
        self, monkeypatch
    ) -> None:
        """Default must match config.constants (and README / .env.example)."""
        from free_claude_code.config.settings import Settings

        monkeypatch.delenv("HTTP_CONNECT_TIMEOUT", raising=False)
        monkeypatch.setitem(Settings.model_config, "env_file", ())
        settings = Settings()
        assert settings.http_connect_timeout == HTTP_CONNECT_TIMEOUT_DEFAULT
        assert HTTP_CONNECT_TIMEOUT_DEFAULT == 10.0

    def test_reasoning_policy_from_env(self, monkeypatch):
        """REASONING_POLICY is loaded as a typed preference."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("REASONING_POLICY", "off")
        settings = Settings()
        assert settings.reasoning_policy is ReasoningPreference.OFF

    def test_root_reasoning_policy_cannot_inherit(self, monkeypatch):
        """Only route overrides may inherit."""
        from pydantic import ValidationError

        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("REASONING_POLICY", "inherit")

        with pytest.raises(ValidationError, match="cannot inherit"):
            Settings()

    def test_wafer_api_key_from_env(self, monkeypatch):
        """WAFER_API_KEY env var is loaded into settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("WAFER_API_KEY", "wafer-key")
        settings = Settings()
        assert settings.wafer_api_key == "wafer-key"

    def test_minimax_settings_from_env(self, monkeypatch):
        """MiniMax key and proxy env vars load into settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("MINIMAX_API_KEY", "minimax-key")
        monkeypatch.setenv("MINIMAX_PROXY", "http://proxy.test:8080")
        settings = Settings()
        assert settings.minimax_api_key == "minimax-key"
        assert settings.minimax_proxy == "http://proxy.test:8080"

    def test_cloudflare_settings_from_env(self, monkeypatch):
        """Cloudflare token, account, and proxy env vars load into settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("CLOUDFLARE_API_TOKEN", "cf-token")
        monkeypatch.setenv("CLOUDFLARE_ACCOUNT_ID", "cf-account")
        monkeypatch.setenv("CLOUDFLARE_PROXY", "http://proxy.test:8080")
        settings = Settings()
        assert settings.cloudflare_api_token == "cf-token"
        assert settings.cloudflare_account_id == "cf-account"
        assert settings.cloudflare_proxy == "http://proxy.test:8080"

    def test_vertex_settings_from_env(self, monkeypatch):
        """Vertex project, location, and proxy env vars load into settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("VERTEX_PROJECT_ID", "vertex-project")
        monkeypatch.setenv("VERTEX_LOCATION", "us-central1")
        monkeypatch.setenv("VERTEX_PROXY", "http://proxy.test:8080")
        settings = Settings()
        assert settings.vertex_project_id == "vertex-project"
        assert settings.vertex_location == "us-central1"
        assert settings.vertex_proxy == "http://proxy.test:8080"

    def test_vercel_settings_from_env(self, monkeypatch):
        """Vercel AI Gateway key and proxy env vars load into settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("AI_GATEWAY_API_KEY", "vercel-key")
        monkeypatch.setenv("VERCEL_AI_GATEWAY_PROXY", "http://proxy.test:8080")
        settings = Settings()
        assert settings.vercel_ai_gateway_api_key == "vercel-key"
        assert settings.vercel_ai_gateway_proxy == "http://proxy.test:8080"

    def test_bedrock_settings_from_official_environment(self, monkeypatch):
        """Bedrock key, regional base URL, and proxy load into settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("AWS_BEARER_TOKEN_BEDROCK", "bedrock-key")
        monkeypatch.setenv(
            "BEDROCK_BASE_URL", "https://bedrock-mantle.us-west-2.api.aws/v1"
        )
        monkeypatch.setenv("BEDROCK_PROXY", "http://proxy.test:8080")
        settings = Settings()

        assert settings.bedrock_api_key == "bedrock-key"
        assert settings.bedrock_base_url == (
            "https://bedrock-mantle.us-west-2.api.aws/v1"
        )
        assert settings.bedrock_proxy == "http://proxy.test:8080"

    def test_huggingface_settings_from_env(self, monkeypatch):
        """Hugging Face key and proxy env vars load into settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("HUGGINGFACE_API_KEY", "hf-key")
        monkeypatch.setenv("HUGGINGFACE_PROXY", "http://proxy.test:8080")
        settings = Settings()
        assert settings.huggingface_api_key == "hf-key"
        assert settings.huggingface_proxy == "http://proxy.test:8080"
        assert not hasattr(settings, "hf_token")

    def test_cohere_settings_from_env(self, monkeypatch):
        """Cohere key and proxy env vars load into settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("COHERE_API_KEY", "cohere-key")
        monkeypatch.setenv("COHERE_PROXY", "http://proxy.test:8080")
        settings = Settings()
        assert settings.cohere_api_key == "cohere-key"
        assert settings.cohere_proxy == "http://proxy.test:8080"

    def test_github_models_settings_from_env(self, monkeypatch):
        """GitHub Models token and proxy env vars load into settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("GITHUB_MODELS_TOKEN", "github-token")
        monkeypatch.setenv("GITHUB_MODELS_PROXY", "http://proxy.test:8080")
        settings = Settings()
        assert settings.github_models_token == "github-token"
        assert settings.github_models_proxy == "http://proxy.test:8080"

    def test_sambanova_settings_from_env(self, monkeypatch):
        """SambaNova key and proxy env vars load into settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("SAMBANOVA_API_KEY", "sambanova-key")
        monkeypatch.setenv("SAMBANOVA_PROXY", "http://proxy.test:8080")
        settings = Settings()
        assert settings.sambanova_api_key == "sambanova-key"
        assert settings.sambanova_proxy == "http://proxy.test:8080"

    def test_legacy_hf_token_env_is_ignored(self, monkeypatch):
        """HF_TOKEN is migrated by startup config migration, not read by Settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("HF_TOKEN", "legacy-token")
        monkeypatch.delenv("HUGGINGFACE_API_KEY", raising=False)
        settings = Settings()
        assert settings.huggingface_api_key == ""
        assert not hasattr(settings, "hf_token")

    def test_route_reasoning_from_env(self, monkeypatch):
        """Route reasoning preferences are loaded into settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("REASONING_FABLE", "high")
        monkeypatch.setenv("REASONING_OPUS", "max")
        monkeypatch.setenv("REASONING_SONNET", "client")
        monkeypatch.setenv("REASONING_HAIKU", "off")
        settings = Settings()
        assert settings.reasoning_fable is ReasoningPreference.HIGH
        assert settings.reasoning_opus is ReasoningPreference.MAX
        assert settings.reasoning_sonnet is ReasoningPreference.CLIENT
        assert settings.reasoning_haiku is ReasoningPreference.OFF

    def test_route_reasoning_inherits_root_policy(self, monkeypatch):
        """Inherit defers route reasoning to the root preference."""
        from free_claude_code.application.routing import ModelRouter
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("REASONING_POLICY", "off")
        monkeypatch.setenv("REASONING_OPUS", "inherit")
        settings = Settings()
        assert settings.reasoning_opus is ReasoningPreference.INHERIT
        assert (
            ModelRouter(settings).resolve("claude-opus-4-20250514").reasoning_preference
            is ReasoningPreference.OFF
        )

    def test_resolve_reasoning_uses_routes(self, monkeypatch):
        """ModelRouter applies route preference then root fallback."""
        from free_claude_code.application.routing import ModelRouter
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("REASONING_POLICY", "off")
        monkeypatch.setenv("REASONING_FABLE", "high")
        monkeypatch.setenv("REASONING_OPUS", "max")
        monkeypatch.setenv("REASONING_HAIKU", "off")
        settings = Settings()
        router = ModelRouter(settings)
        assert (
            router.resolve("claude-fable-5").reasoning_preference
            is ReasoningPreference.HIGH
        )
        assert (
            router.resolve("claude-opus-4-20250514").reasoning_preference
            is ReasoningPreference.MAX
        )
        assert (
            router.resolve("claude-sonnet-4-20250514").reasoning_preference
            is ReasoningPreference.OFF
        )
        assert (
            router.resolve("claude-haiku-4-20250514").reasoning_preference
            is ReasoningPreference.OFF
        )
        assert (
            router.resolve("unknown-model").reasoning_preference
            is ReasoningPreference.OFF
        )

    def test_anthropic_auth_token_from_env_without_dotenv_key(self, monkeypatch):
        """ANTHROPIC_AUTH_TOKEN env var is loaded when dotenv does not define it."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("ANTHROPIC_AUTH_TOKEN", "process-token")
        monkeypatch.setitem(Settings.model_config, "env_file", ())
        settings = Settings()
        assert settings.anthropic_auth_token == "process-token"
        assert (
            process_env_key_is_effective(
                Settings.model_config, ANTHROPIC_AUTH_TOKEN_ENV
            )
            is True
        )

    def test_empty_dotenv_anthropic_auth_token_overrides_process_env(
        self, monkeypatch, tmp_path
    ):
        """An explicit empty .env token disables auth despite stale shell tokens."""
        from free_claude_code.config.settings import Settings

        env_file = tmp_path / ".env"
        env_file.write_text("ANTHROPIC_AUTH_TOKEN=\n", encoding="utf-8")
        monkeypatch.setenv("ANTHROPIC_AUTH_TOKEN", "stale-client-token")
        monkeypatch.setitem(Settings.model_config, "env_file", (env_file,))

        settings = Settings()
        assert settings.anthropic_auth_token == ""
        assert (
            process_env_key_is_effective(
                Settings.model_config, ANTHROPIC_AUTH_TOKEN_ENV
            )
            is False
        )

    def test_dotenv_anthropic_auth_token_overrides_process_env(
        self, monkeypatch, tmp_path
    ):
        """A configured .env token is the server token even with a stale shell token."""
        from free_claude_code.config.settings import Settings

        env_file = tmp_path / ".env"
        env_file.write_text(
            'ANTHROPIC_AUTH_TOKEN="server-token"\n',
            encoding="utf-8",
        )
        monkeypatch.setenv("ANTHROPIC_AUTH_TOKEN", "stale-client-token")
        monkeypatch.setitem(Settings.model_config, "env_file", (env_file,))

        settings = Settings()
        assert settings.anthropic_auth_token == "server-token"
        assert (
            process_env_key_is_effective(
                Settings.model_config, ANTHROPIC_AUTH_TOKEN_ENV
            )
            is False
        )

    @pytest.mark.parametrize("removed_key", ["NIM_ENABLE_THINKING", "ENABLE_THINKING"])
    def test_removed_thinking_env_keys_are_ignored(self, monkeypatch, removed_key):
        """Stale thinking env keys do not block startup or affect settings."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv(removed_key, "false")
        monkeypatch.setitem(Settings.model_config, "env_file", ())

        settings = Settings()

        assert settings.reasoning_policy is ReasoningPreference.CLIENT

    @pytest.mark.parametrize("removed_key", ["NIM_ENABLE_THINKING", "ENABLE_THINKING"])
    @pytest.mark.parametrize("value", ["false", ""])
    def test_removed_thinking_dotenv_keys_are_ignored(
        self, monkeypatch, tmp_path, removed_key, value
    ):
        """Stale thinking dotenv keys do not block startup or affect settings."""
        from free_claude_code.config.settings import Settings

        env_file = tmp_path / ".env"
        env_file.write_text(f"{removed_key}={value}\n", encoding="utf-8")
        monkeypatch.delenv(removed_key, raising=False)
        monkeypatch.setitem(Settings.model_config, "env_file", (env_file,))

        settings = Settings()

        assert settings.reasoning_policy is ReasoningPreference.CLIENT


# --- NimSettings Validation Tests ---
class TestNimSettingsValidBounds:
    """Test that valid values within bounds are accepted."""

    @pytest.mark.parametrize("top_k", [-1, 0, 1, 100])
    def test_top_k_valid(self, top_k):
        """top_k >= -1 should be accepted."""
        s = NimSettings(top_k=top_k)
        assert s.top_k == top_k

    @pytest.mark.parametrize("temp", [0.0, 0.5, 1.0, 2.0])
    def test_temperature_valid(self, temp):
        s = NimSettings(temperature=temp)
        assert s.temperature == temp

    @pytest.mark.parametrize("top_p", [0.0, 0.5, 1.0])
    def test_top_p_valid(self, top_p):
        s = NimSettings(top_p=top_p)
        assert s.top_p == top_p

    def test_max_tokens_valid(self):
        s = NimSettings(max_tokens=1)
        assert s.max_tokens == 1

    def test_min_tokens_valid(self):
        s = NimSettings(min_tokens=0)
        assert s.min_tokens == 0

    @pytest.mark.parametrize("penalty", [-2.0, 0.0, 2.0])
    def test_presence_penalty_valid(self, penalty):
        s = NimSettings(presence_penalty=penalty)
        assert s.presence_penalty == penalty

    @pytest.mark.parametrize("penalty", [-2.0, 0.0, 2.0])
    def test_frequency_penalty_valid(self, penalty):
        s = NimSettings(frequency_penalty=penalty)
        assert s.frequency_penalty == penalty

    @pytest.mark.parametrize("min_p", [0.0, 0.5, 1.0])
    def test_min_p_valid(self, min_p):
        s = NimSettings(min_p=min_p)
        assert s.min_p == min_p


class TestNimSettingsInvalidBounds:
    """Test that out-of-range values raise ValidationError."""

    @pytest.mark.parametrize("top_k", [-2, -100])
    def test_top_k_below_lower_bound(self, top_k):
        with pytest.raises((ValidationError, ValueError)):
            NimSettings(top_k=top_k)

    def test_temperature_negative(self):
        with pytest.raises(ValidationError):
            NimSettings(temperature=-0.1)

    @pytest.mark.parametrize("top_p", [-0.1, 1.1])
    def test_top_p_out_of_range(self, top_p):
        with pytest.raises(ValidationError):
            NimSettings(top_p=top_p)

    @pytest.mark.parametrize("penalty", [-2.1, 2.1])
    def test_presence_penalty_out_of_range(self, penalty):
        with pytest.raises(ValidationError):
            NimSettings(presence_penalty=penalty)

    @pytest.mark.parametrize("penalty", [-2.1, 2.1])
    def test_frequency_penalty_out_of_range(self, penalty):
        with pytest.raises(ValidationError):
            NimSettings(frequency_penalty=penalty)

    @pytest.mark.parametrize("min_p", [-0.1, 1.1])
    def test_min_p_out_of_range(self, min_p):
        with pytest.raises(ValidationError):
            NimSettings(min_p=min_p)

    @pytest.mark.parametrize("max_tokens", [0, -1])
    def test_max_tokens_too_low(self, max_tokens):
        with pytest.raises(ValidationError):
            NimSettings(max_tokens=max_tokens)

    def test_min_tokens_negative(self):
        with pytest.raises(ValidationError):
            NimSettings(min_tokens=-1)


class TestNimSettingsValidators:
    """Test custom field validators in NimSettings."""

    def test_default_max_tokens_matches_shared_constant(self):
        assert NimSettings().max_tokens == ANTHROPIC_DEFAULT_MAX_OUTPUT_TOKENS

    @pytest.mark.parametrize(
        "seed_val,expected",
        [("", None), (None, None), ("42", 42), (42, 42)],
        ids=["empty_str", "none", "str_42", "int_42"],
    )
    def test_parse_optional_int(self, seed_val, expected):
        s = NimSettings(seed=seed_val)
        assert s.seed == expected

    @pytest.mark.parametrize(
        "stop_val,expected",
        [("", None), ("STOP", "STOP"), (None, None)],
        ids=["empty_str", "valid", "none"],
    )
    def test_parse_optional_str_stop(self, stop_val, expected):
        s = NimSettings(stop=stop_val)
        assert s.stop == expected

    @pytest.mark.parametrize(
        "chat_template_val,expected",
        [("", None), ("template", "template")],
        ids=["empty_str", "valid"],
    )
    def test_parse_optional_str_chat_template(self, chat_template_val, expected):
        s = NimSettings(chat_template=chat_template_val)
        assert s.chat_template == expected

    def test_extra_forbid_rejects_unknown_field(self):
        """NimSettings with extra='forbid' rejects unknown fields."""
        from typing import Any, cast

        with pytest.raises(ValidationError):
            NimSettings(**cast(Any, {"unknown_field": "value"}))

    def test_enable_thinking_field_removed(self):
        """NimSettings no longer accepts the removed thinking toggle."""
        from typing import Any, cast

        with pytest.raises(ValidationError):
            NimSettings(**cast(Any, {"enable_thinking": True}))


class TestSettingsOptionalStr:
    """Test Settings parse_optional_str validator."""

    def test_empty_telegram_token_to_none(self, monkeypatch):
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("TELEGRAM_BOT_TOKEN", "")
        s = Settings()
        assert s.telegram_bot_token is None

    def test_valid_telegram_token_preserved(self, monkeypatch):
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("TELEGRAM_BOT_TOKEN", "abc123")
        s = Settings()
        assert s.telegram_bot_token == "abc123"

    def test_empty_allowed_user_id_to_none(self, monkeypatch):
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("ALLOWED_TELEGRAM_USER_ID", "")
        s = Settings()
        assert s.allowed_telegram_user_id is None

    def test_discord_bot_token_from_env(self, monkeypatch):
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("DISCORD_BOT_TOKEN", "discord_token_123")
        s = Settings()
        assert s.discord_bot_token == "discord_token_123"

    def test_empty_discord_bot_token_to_none(self, monkeypatch):
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("DISCORD_BOT_TOKEN", "")
        s = Settings()
        assert s.discord_bot_token is None

    def test_allowed_discord_channels_from_env(self, monkeypatch):
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("ALLOWED_DISCORD_CHANNELS", "111,222,333")
        s = Settings()
        assert s.allowed_discord_channels == "111,222,333"

    def test_messaging_platform_from_env(self, monkeypatch):
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("MESSAGING_PLATFORM", "discord")
        s = Settings()
        assert s.messaging_platform == "discord"

    def test_whisper_device_auto_rejected(self, monkeypatch):
        """WHISPER_DEVICE=auto raises ValidationError (auto removed)."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("WHISPER_DEVICE", "auto")
        with pytest.raises(ValidationError, match="whisper_device"):
            Settings()

    @pytest.mark.parametrize("device", ["cpu", "cuda"])
    def test_whisper_device_valid(self, monkeypatch, device):
        """Valid whisper_device values are accepted."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("WHISPER_DEVICE", device)
        s = Settings()
        assert s.whisper_device == device


class TestPerModelMapping:
    """Test per-model settings and model-ref helpers."""

    def test_model_fields_default_none(self):
        """Per-model fields default to None."""
        from free_claude_code.config.settings import Settings

        s = Settings()
        assert s.model_fable is None
        assert s.model_opus is None
        assert s.model_sonnet is None
        assert s.model_haiku is None

    def test_model_opus_from_env(self, monkeypatch):
        """MODEL_OPUS env var is loaded."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("MODEL_OPUS", "open_router/deepseek/deepseek-r1")
        s = Settings()
        assert s.model_opus == "open_router/deepseek/deepseek-r1"

    def test_model_fable_from_env(self, monkeypatch):
        """MODEL_FABLE env var is loaded."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("MODEL_FABLE", "open_router/anthropic/claude-fable-5")
        s = Settings()
        assert s.model_fable == "open_router/anthropic/claude-fable-5"

    @pytest.mark.parametrize(
        "env_var", ["MODEL_FABLE", "MODEL_OPUS", "MODEL_SONNET", "MODEL_HAIKU"]
    )
    def test_empty_model_override_env_is_unset(self, monkeypatch, env_var):
        """Empty per-model override env vars are treated as unset."""
        from free_claude_code.application.routing import ModelRouter
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv(env_var, "")
        s = Settings()
        assert getattr(s, env_var.lower()) is None
        assert (
            ModelRouter(s)
            .resolve(f"claude-{env_var.removeprefix('MODEL_').lower()}-4")
            .provider_model_ref
            == s.model
        )

    @pytest.mark.parametrize(
        "env_vars,expected_model,expected_haiku",
        [
            (
                {"MODEL": "nvidia_nim/meta/llama3-70b-instruct"},
                "nvidia_nim/meta/llama3-70b-instruct",
                None,
            ),
            (
                {
                    "MODEL": "open_router/anthropic/claude-3-opus",
                    "MODEL_HAIKU": "open_router/anthropic/claude-3-haiku",
                },
                "open_router/anthropic/claude-3-opus",
                "open_router/anthropic/claude-3-haiku",
            ),
            ({"MODEL": "deepseek/deepseek-chat"}, "deepseek/deepseek-chat", None),
            ({"MODEL": "wafer/DeepSeek-V4-Pro"}, "wafer/DeepSeek-V4-Pro", None),
            (
                {"MODEL": "cloudflare/@cf/moonshotai/kimi-k2.6"},
                "cloudflare/@cf/moonshotai/kimi-k2.6",
                None,
            ),
            (
                {"MODEL": "github_models/openai/gpt-4.1"},
                "github_models/openai/gpt-4.1",
                None,
            ),
            (
                {"MODEL": "sambanova/Meta-Llama-3.3-70B-Instruct"},
                "sambanova/Meta-Llama-3.3-70B-Instruct",
                None,
            ),
            ({"MODEL": "lmstudio/qwen2.5-7b"}, "lmstudio/qwen2.5-7b", None),
            ({"MODEL": "llamacpp/local-model"}, "llamacpp/local-model", None),
            ({"MODEL": "ollama/llama3.1"}, "ollama/llama3.1", None),
            (
                {"MODEL": "ollama_cloud/qwen3-coder:480b"},
                "ollama_cloud/qwen3-coder:480b",
                None,
            ),
        ],
    )
    def test_settings_models_from_env(
        self, env_vars, expected_model, expected_haiku, monkeypatch
    ):
        """Test environment variables override model defaults."""
        from free_claude_code.config.settings import Settings

        for k, v in env_vars.items():
            monkeypatch.setenv(k, v)

        s = Settings()
        assert s.model == expected_model
        assert s.model_haiku == expected_haiku

    def test_model_sonnet_from_env(self, monkeypatch):
        """MODEL_SONNET env var is loaded."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("MODEL_SONNET", "nvidia_nim/meta/llama-3.3-70b-instruct")
        s = Settings()
        assert s.model_sonnet == "nvidia_nim/meta/llama-3.3-70b-instruct"

    def test_model_haiku_from_env(self, monkeypatch):
        """MODEL_HAIKU env var is loaded."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("MODEL_HAIKU", "lmstudio/qwen2.5-7b")
        s = Settings()
        assert s.model_haiku == "lmstudio/qwen2.5-7b"

    def test_model_opus_invalid_provider_raises(self, monkeypatch):
        """MODEL_OPUS with invalid provider prefix raises ValidationError."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("MODEL_OPUS", "bad_provider/some-model")
        with pytest.raises(ValidationError, match="Invalid provider"):
            Settings()

    def test_model_opus_no_slash_raises(self, monkeypatch):
        """MODEL_OPUS without provider prefix raises ValidationError."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("MODEL_OPUS", "noprefix")
        with pytest.raises(ValidationError, match="provider type"):
            Settings()

    def test_model_haiku_invalid_provider_raises(self, monkeypatch):
        """MODEL_HAIKU with invalid provider prefix raises ValidationError."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("MODEL_HAIKU", "invalid/model")
        with pytest.raises(ValidationError, match="Invalid provider"):
            Settings()

    def test_model_fable_invalid_provider_raises(self, monkeypatch):
        """MODEL_FABLE with invalid provider prefix raises ValidationError."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("MODEL_FABLE", "invalid/model")
        with pytest.raises(ValidationError, match="Invalid provider"):
            Settings()

    def test_resolve_model_fable_override(self):
        """ModelRouter returns model_fable for Fable model names."""
        from free_claude_code.application.routing import ModelRouter
        from free_claude_code.config.settings import Settings

        s = Settings()
        s.model_fable = "open_router/anthropic/claude-fable-5"
        assert (
            ModelRouter(s).resolve("claude-fable-5").provider_model_ref
            == "open_router/anthropic/claude-fable-5"
        )

    def test_resolve_model_opus_override(self):
        """ModelRouter returns model_opus for opus model names."""
        from free_claude_code.application.routing import ModelRouter
        from free_claude_code.config.settings import Settings

        s = Settings()
        s.model_opus = "open_router/deepseek/deepseek-r1"
        router = ModelRouter(s)
        assert (
            router.resolve("claude-opus-4-20250514").provider_model_ref
            == "open_router/deepseek/deepseek-r1"
        )
        assert (
            router.resolve("claude-3-opus").provider_model_ref
            == "open_router/deepseek/deepseek-r1"
        )
        assert (
            router.resolve("claude-3-opus-20240229").provider_model_ref
            == "open_router/deepseek/deepseek-r1"
        )

    def test_resolve_model_sonnet_override(self):
        """ModelRouter returns model_sonnet for sonnet model names."""
        from free_claude_code.application.routing import ModelRouter
        from free_claude_code.config.settings import Settings

        s = Settings()
        s.model_sonnet = "nvidia_nim/meta/llama-3.3-70b-instruct"
        router = ModelRouter(s)
        assert (
            router.resolve("claude-sonnet-4-20250514").provider_model_ref
            == "nvidia_nim/meta/llama-3.3-70b-instruct"
        )
        assert (
            router.resolve("claude-3-5-sonnet-20241022").provider_model_ref
            == "nvidia_nim/meta/llama-3.3-70b-instruct"
        )

    def test_resolve_model_haiku_override(self):
        """ModelRouter returns model_haiku for haiku model names."""
        from free_claude_code.application.routing import ModelRouter
        from free_claude_code.config.settings import Settings

        s = Settings()
        s.model_haiku = "lmstudio/qwen2.5-7b"
        router = ModelRouter(s)
        assert (
            router.resolve("claude-3-haiku-20240307").provider_model_ref
            == "lmstudio/qwen2.5-7b"
        )
        assert (
            router.resolve("claude-3-5-haiku-20241022").provider_model_ref
            == "lmstudio/qwen2.5-7b"
        )
        assert (
            router.resolve("claude-haiku-4-20250514").provider_model_ref
            == "lmstudio/qwen2.5-7b"
        )

    def test_resolve_model_fallback_when_override_not_set(self):
        """ModelRouter falls back to MODEL when model override is None."""
        from free_claude_code.application.routing import ModelRouter
        from free_claude_code.config.settings import Settings

        s = Settings()
        s.model = "nvidia_nim/fallback-model"
        router = ModelRouter(s)
        assert (
            router.resolve("claude-fable-5").provider_model_ref
            == "nvidia_nim/fallback-model"
        )
        assert (
            router.resolve("claude-opus-4-20250514").provider_model_ref
            == "nvidia_nim/fallback-model"
        )
        assert (
            router.resolve("claude-sonnet-4-20250514").provider_model_ref
            == "nvidia_nim/fallback-model"
        )
        assert (
            router.resolve("claude-3-haiku-20240307").provider_model_ref
            == "nvidia_nim/fallback-model"
        )

    def test_resolve_model_unknown_model_falls_back(self):
        """ModelRouter falls back to MODEL for unrecognized model names."""
        from free_claude_code.application.routing import ModelRouter
        from free_claude_code.config.settings import Settings

        s = Settings()
        s.model = "nvidia_nim/fallback-model"
        s.model_opus = "open_router/opus-model"
        router = ModelRouter(s)
        assert router.resolve("claude-2.1").provider_model_ref == (
            "nvidia_nim/fallback-model"
        )
        assert router.resolve("some-unknown-model").provider_model_ref == (
            "nvidia_nim/fallback-model"
        )

    def test_resolve_model_case_insensitive(self):
        """Model classification is case-insensitive."""
        from free_claude_code.application.routing import ModelRouter
        from free_claude_code.config.settings import Settings

        s = Settings()
        s.model_opus = "open_router/opus-model"
        assert (
            ModelRouter(s).resolve("Claude-OPUS-4").provider_model_ref
            == "open_router/opus-model"
        )

    def test_parse_provider_type(self):
        """parse_provider_type extracts provider from model string."""

        assert parse_provider_type("nvidia_nim/meta/llama") == "nvidia_nim"
        assert parse_provider_type("open_router/deepseek/r1") == "open_router"
        assert parse_provider_type("mistral/devstral-small-latest") == "mistral"
        assert (
            parse_provider_type("mistral_codestral/codestral-latest")
            == "mistral_codestral"
        )
        assert parse_provider_type("deepseek/deepseek-chat") == "deepseek"
        assert parse_provider_type("lmstudio/qwen") == "lmstudio"
        assert parse_provider_type("llamacpp/model") == "llamacpp"
        assert parse_provider_type("ollama/llama3.1") == "ollama"
        assert parse_provider_type("ollama_cloud/qwen3-coder:480b") == "ollama_cloud"
        assert parse_provider_type("wafer/DeepSeek-V4-Pro") == "wafer"
        assert parse_provider_type("minimax/MiniMax-M3") == "minimax"
        assert (
            parse_provider_type("cloudflare/@cf/moonshotai/kimi-k2.6") == "cloudflare"
        )
        assert parse_provider_type("vercel/openai/gpt-5.5") == "vercel"
        assert (
            parse_provider_type("huggingface/openai/gpt-oss-120b:fastest")
            == "huggingface"
        )
        assert parse_provider_type("cohere/command-a-plus-05-2026") == "cohere"
        assert parse_provider_type("github_models/openai/gpt-4.1") == ("github_models")
        assert parse_provider_type("gemini/models/gemini-3.1-flash-lite") == "gemini"
        assert parse_provider_type("groq/llama-3.3-70b-versatile") == "groq"
        assert (
            parse_provider_type("sambanova/Meta-Llama-3.3-70B-Instruct") == "sambanova"
        )
        assert parse_provider_type("cerebras/llama3.1-8b") == "cerebras"

    def test_parse_model_name(self):
        """parse_model_name extracts model name from model string."""

        assert parse_model_name("nvidia_nim/meta/llama") == "meta/llama"
        assert parse_model_name("mistral/devstral-small-latest") == (
            "devstral-small-latest"
        )
        assert (
            parse_model_name("mistral_codestral/codestral-latest") == "codestral-latest"
        )
        assert parse_model_name("deepseek/deepseek-chat") == "deepseek-chat"
        assert parse_model_name("lmstudio/qwen") == "qwen"
        assert parse_model_name("llamacpp/model") == "model"
        assert parse_model_name("ollama/llama3.1") == "llama3.1"
        assert parse_model_name("ollama_cloud/qwen3-coder:480b") == "qwen3-coder:480b"
        assert parse_model_name("wafer/DeepSeek-V4-Pro") == "DeepSeek-V4-Pro"
        assert parse_model_name("minimax/MiniMax-M3") == "MiniMax-M3"
        assert (
            parse_model_name("cloudflare/@cf/moonshotai/kimi-k2.6")
            == "@cf/moonshotai/kimi-k2.6"
        )
        assert parse_model_name("vercel/openai/gpt-5.5") == "openai/gpt-5.5"
        assert (
            parse_model_name("huggingface/openai/gpt-oss-120b:fastest")
            == "openai/gpt-oss-120b:fastest"
        )
        assert parse_model_name("cohere/command-a-plus-05-2026") == (
            "command-a-plus-05-2026"
        )
        assert parse_model_name("github_models/openai/gpt-4.1") == "openai/gpt-4.1"
        assert (
            parse_model_name("gemini/models/gemini-3.1-flash-lite")
            == "models/gemini-3.1-flash-lite"
        )
        assert (
            parse_model_name("groq/llama-3.3-70b-versatile")
            == "llama-3.3-70b-versatile"
        )
        assert (
            parse_model_name("sambanova/Meta-Llama-3.3-70B-Instruct")
            == "Meta-Llama-3.3-70B-Instruct"
        )
        assert parse_model_name("cerebras/llama3.1-8b") == "llama3.1-8b"

    def test_configured_chat_model_refs_collects_unique_models(self, monkeypatch):
        """Model discovery is limited to configured chat references."""
        from free_claude_code.config.settings import Settings

        monkeypatch.setenv("FCC_SMOKE_MODEL_NVIDIA_NIM", "nvidia_nim/smoke")
        monkeypatch.setenv("WHISPER_MODEL", "openai/whisper-large-v3")
        s = Settings()
        s.model = "nvidia_nim/fallback"
        s.model_fable = "open_router/anthropic/claude-fable-5"
        s.model_opus = "open_router/anthropic/claude-opus"
        s.model_sonnet = "nvidia_nim/fallback"
        s.model_haiku = None

        refs = configured_chat_model_refs(s)

        assert [ref.model_ref for ref in refs] == [
            "nvidia_nim/fallback",
            "open_router/anthropic/claude-fable-5",
            "open_router/anthropic/claude-opus",
        ]
        assert refs[0].provider_id == "nvidia_nim"
        assert refs[0].model_id == "fallback"
        assert refs[1].provider_id == "open_router"
        assert refs[1].model_id == "anthropic/claude-fable-5"
        assert refs[2].provider_id == "open_router"
        assert refs[2].model_id == "anthropic/claude-opus"