"""Tests for config.yaml structure validation (validate_config_structure)."""


from hermes_cli.config import (
    DEFAULT_CONFIG,
    _EXTRA_KNOWN_ROOT_KEYS,
    _KNOWN_ROOT_KEYS,
    validate_config_structure,
    ConfigIssue,
)


class TestCustomProvidersValidation:
    """custom_providers must be a YAML list, not a dict."""

    def test_dict_instead_of_list(self):
        """The exact Discord user scenario — custom_providers as flat dict."""
        issues = validate_config_structure({
            "custom_providers": {
                "name": "Generativelanguage.googleapis.com",
                "base_url": "https://generativelanguage.googleapis.com/v1beta",
                "api_key": "xxx",
                "model": "models/gemini-2.5-flash",
                "rate_limit_delay": 2.0,
                "fallback_model": {
                    "provider": "openrouter",
                    "model": "qwen/qwen3.6-plus:free",
                },
            },
            "fallback_providers": [],
        })
        errors = [i for i in issues if i.severity == "error"]
        assert any("dict" in i.message and "list" in i.message for i in errors), (
            "Should detect custom_providers as dict instead of list"
        )

    def test_dict_detects_misplaced_fields(self):
        """When custom_providers is a dict, detect fields that look misplaced."""
        issues = validate_config_structure({
            "custom_providers": {
                "name": "test",
                "base_url": "https://example.com",
                "api_key": "xxx",
            },
        })
        warnings = [i for i in issues if i.severity == "warning"]
        # Should flag base_url, api_key as looking like custom_providers entry fields
        misplaced = [i for i in warnings if "custom_providers entry fields" in i.message]
        assert len(misplaced) == 1

    def test_dict_detects_nested_fallback(self):
        """When fallback_model gets swallowed into custom_providers dict."""
        issues = validate_config_structure({
            "custom_providers": {
                "name": "test",
                "fallback_model": {"provider": "openrouter", "model": "test"},
            },
        })
        errors = [i for i in issues if i.severity == "error"]
        assert any("fallback_model" in i.message and "inside" in i.message for i in errors)

    def test_valid_list_no_issues(self):
        """Properly formatted custom_providers should produce no issues."""
        issues = validate_config_structure({
            "custom_providers": [
                {"name": "gemini", "base_url": "https://example.com/v1"},
            ],
            "model": {"provider": "custom", "default": "test"},
        })
        assert len(issues) == 0

    def test_list_entry_missing_name(self):
        """List entry without name should warn."""
        issues = validate_config_structure({
            "custom_providers": [{"base_url": "https://example.com/v1"}],
            "model": {"provider": "custom"},
        })
        assert any("missing 'name'" in i.message for i in issues)

    def test_list_entry_missing_base_url(self):
        """List entry without base_url should warn."""
        issues = validate_config_structure({
            "custom_providers": [{"name": "test"}],
            "model": {"provider": "custom"},
        })
        assert any("missing 'base_url'" in i.message for i in issues)

    def test_list_entry_not_dict(self):
        """Non-dict list entries should warn."""
        issues = validate_config_structure({
            "custom_providers": ["not-a-dict"],
            "model": {"provider": "custom"},
        })
        assert any("not a dict" in i.message for i in issues)

    def test_none_custom_providers_no_issues(self):
        """No custom_providers at all should be fine."""
        issues = validate_config_structure({
            "model": {"provider": "openrouter"},
        })
        assert len(issues) == 0


class TestFallbackModelValidation:
    """fallback_model should be a top-level dict with provider + model."""

    def test_missing_provider(self):
        issues = validate_config_structure({
            "fallback_model": {"model": "anthropic/claude-sonnet-4"},
        })
        assert any("missing 'provider'" in i.message for i in issues)

    def test_missing_model(self):
        issues = validate_config_structure({
            "fallback_model": {"provider": "openrouter"},
        })
        assert any("missing 'model'" in i.message for i in issues)

    def test_valid_fallback(self):
        issues = validate_config_structure({
            "fallback_model": {
                "provider": "openrouter",
                "model": "anthropic/claude-sonnet-4",
            },
        })
        # Only fallback-related issues should be absent
        fb_issues = [i for i in issues if "fallback" in i.message.lower()]
        assert len(fb_issues) == 0

    def test_non_dict_fallback(self):
        issues = validate_config_structure({
            "fallback_model": "openrouter:anthropic/claude-sonnet-4",
        })
        assert any("should be a dict" in i.message for i in issues)

    def test_empty_fallback_dict_no_issues(self):
        """Empty fallback_model dict means disabled — no warnings needed."""
        issues = validate_config_structure({
            "fallback_model": {},
        })
        fb_issues = [i for i in issues if "fallback" in i.message.lower()]
        assert len(fb_issues) == 0

    def test_valid_fallback_list(self):
        """List-form fallback_model (chain) should validate when every entry has provider+model."""
        issues = validate_config_structure({
            "fallback_model": [
                {"provider": "openrouter", "model": "anthropic/claude-sonnet-4"},
                {"provider": "anthropic", "model": "claude-sonnet-4-6"},
            ],
        })
        fb_issues = [i for i in issues if "fallback" in i.message.lower()]
        assert len(fb_issues) == 0

    def test_fallback_list_entry_missing_provider(self):
        issues = validate_config_structure({
            "fallback_model": [
                {"provider": "openrouter", "model": "anthropic/claude-sonnet-4"},
                {"model": "claude-sonnet-4-6"},
            ],
        })
        assert any("fallback_model[1]" in i.message and "provider" in i.message for i in issues)

    def test_fallback_list_entry_missing_model(self):
        issues = validate_config_structure({
            "fallback_model": [
                {"provider": "openrouter"},
            ],
        })
        assert any("fallback_model[0]" in i.message and "model" in i.message for i in issues)

    def test_fallback_list_entry_not_a_dict(self):
        issues = validate_config_structure({
            "fallback_model": ["openrouter:anthropic/claude-sonnet-4"],
        })
        assert any("fallback_model[0]" in i.message and "should be a dict" in i.message for i in issues)


class TestMissingModelSection:
    """Warn when custom_providers exists but model section is missing."""

    def test_custom_providers_without_model(self):
        issues = validate_config_structure({
            "custom_providers": [
                {"name": "test", "base_url": "https://example.com/v1"},
            ],
        })
        assert any("no 'model' section" in i.message for i in issues)

    def test_custom_providers_with_model(self):
        issues = validate_config_structure({
            "custom_providers": [
                {"name": "test", "base_url": "https://example.com/v1"},
            ],
            "model": {"provider": "custom", "default": "test-model"},
        })
        # Should not warn about missing model section
        assert not any("no 'model' section" in i.message for i in issues)


class TestConfigIssueDataclass:
    """ConfigIssue should be a proper dataclass."""

    def test_fields(self):
        issue = ConfigIssue(severity="error", message="test msg", hint="test hint")
        assert issue.severity == "error"
        assert issue.message == "test msg"
        assert issue.hint == "test hint"

    def test_equality(self):
        a = ConfigIssue("error", "msg", "hint")
        b = ConfigIssue("error", "msg", "hint")
        assert a == b


class TestUnknownTopLevelKeys:
    """Arbitrary top-level keys must NOT warn — they are bridged to os.environ.

    Top-level scalars in config.yaml are forwarded into the environment
    (gateway/run.py, hermes send) so users can feed skills and external apps
    env-style keys like DISCORD_HOME_CHANNEL or MY_APP_TOKEN. A closed-world
    allowlist can never enumerate those, so no "Unknown top-level config key"
    warning may exist.
    """

    def test_arbitrary_top_level_keys_stay_silent(self):
        """Env-style and custom keys must produce no unknown-key warnings."""
        issues = validate_config_structure({
            "model": {"provider": "openrouter"},
            "DISCORD_HOME_CHANNEL": "12345",
            "TELEGRAM_HOME_CHANNEL": "-100987",
            "DISCORD_ALLOW_ALL_USERS": True,
            "MY_CUSTOM_SKILL_VAR": "hello",
            "skillz": {"enabled": True},
        })
        assert not any("Unknown top-level config key" in i.message for i in issues)
        assert issues == []

    def test_known_root_keys_derived_from_default_config(self):
        """_KNOWN_ROOT_KEYS must be DEFAULT_CONFIG.keys() plus extras — single source of truth."""
        assert set(DEFAULT_CONFIG.keys()).issubset(_KNOWN_ROOT_KEYS)
        assert _EXTRA_KNOWN_ROOT_KEYS.issubset(_KNOWN_ROOT_KEYS)
        assert _KNOWN_ROOT_KEYS == frozenset(DEFAULT_CONFIG.keys()) | _EXTRA_KNOWN_ROOT_KEYS

    def test_provider_like_unknown_root_keeps_misplaced_message(self):
        """Preserve existing base_url/api_key root-level guidance."""
        issues = validate_config_structure({
            "base_url": "https://example.com/v1",
            "api_key": "secret",
        })
        misplaced = [
            i for i in issues
            if i.severity == "warning" and "looks misplaced" in i.message
        ]
        assert any("base_url" in i.message for i in misplaced)
        assert any("api_key" in i.message for i in misplaced)

    def test_private_underscore_keys_not_flagged(self):
        """Internal keys starting with _ remain ignored."""
        issues = validate_config_structure({
            "_internal_scratch": True,
            "model": {"provider": "openrouter"},
        })
        assert issues == []