"""Unit tests for the LLM capability table."""

import pytest

from tradingagents.llm_clients.capabilities import (
    ModelCapabilities,
    get_capabilities,
)


@pytest.mark.unit
class TestExactIdMatches:
    def test_deepseek_chat_supports_tool_choice(self):
        caps = get_capabilities("deepseek-chat")
        assert caps.supports_tool_choice is True

    def test_deepseek_reasoner_rejects_tool_choice(self):
        caps = get_capabilities("deepseek-reasoner")
        assert caps.supports_tool_choice is False
        assert caps.requires_reasoning_content_roundtrip is True

    def test_deepseek_v4_flash_rejects_tool_choice(self):
        caps = get_capabilities("deepseek-v4-flash")
        assert caps.supports_tool_choice is False
        assert caps.requires_reasoning_content_roundtrip is True

    def test_deepseek_v4_pro_rejects_tool_choice(self):
        caps = get_capabilities("deepseek-v4-pro")
        assert caps.supports_tool_choice is False
        assert caps.requires_reasoning_content_roundtrip is True


@pytest.mark.unit
class TestPatternMatches:
    """Forward-compat regex patterns catch unknown DeepSeek variants."""

    def test_future_deepseek_v5_inherits_thinking_quirks(self):
        caps = get_capabilities("deepseek-v5-flash")
        assert caps.supports_tool_choice is False
        assert caps.requires_reasoning_content_roundtrip is True

    def test_future_deepseek_v9_inherits_thinking_quirks(self):
        caps = get_capabilities("deepseek-v9-anything")
        assert caps.supports_tool_choice is False

    def test_reasoner_variant_inherits_thinking_quirks(self):
        caps = get_capabilities("deepseek-reasoner-pro")
        assert caps.supports_tool_choice is False


@pytest.mark.unit
class TestDefault:
    """Unknown / non-DeepSeek models get the permissive default."""

    def test_gpt_default(self):
        caps = get_capabilities("gpt-4.1")
        assert caps.supports_tool_choice is True
        assert caps.preferred_structured_method == "function_calling"

    def test_grok_default(self):
        caps = get_capabilities("grok-4-0709")
        assert caps.supports_tool_choice is True

    def test_unknown_model_default(self):
        caps = get_capabilities("totally-made-up-model-id")
        assert caps.supports_tool_choice is True

    def test_exact_match_precedes_pattern(self):
        """deepseek-chat must NOT match the v\\d regex."""
        caps = get_capabilities("deepseek-chat")
        assert caps.supports_tool_choice is True


@pytest.mark.unit
def test_capabilities_dataclass_is_frozen():
    """Capability rows are immutable so they can be safely shared."""
    caps = get_capabilities("deepseek-chat")
    with pytest.raises(Exception):
        caps.supports_tool_choice = False  # type: ignore[misc]