"""
Integration tests for model enumeration across all provider combinations.

These tests ensure that the _get_available_models() method correctly returns
all expected models based on which providers are configured via environment variables.
"""

import importlib
import os

import pytest

from providers.registry import ModelProviderRegistry
from tools.analyze import AnalyzeTool


@pytest.mark.no_mock_provider
class TestModelEnumeration:
    """Test model enumeration with various provider configurations"""

    def setup_method(self):
        """Set up clean state before each test."""
        # Save original environment state
        self._original_env = {
            "DEFAULT_MODEL": os.environ.get("DEFAULT_MODEL", ""),
            "GEMINI_API_KEY": os.environ.get("GEMINI_API_KEY", ""),
            "OPENAI_API_KEY": os.environ.get("OPENAI_API_KEY", ""),
            "XAI_API_KEY": os.environ.get("XAI_API_KEY", ""),
            "OPENROUTER_API_KEY": os.environ.get("OPENROUTER_API_KEY", ""),
            "CUSTOM_API_URL": os.environ.get("CUSTOM_API_URL", ""),
        }

        # Clear provider registry
        ModelProviderRegistry._instance = None

    def teardown_method(self):
        """Clean up after each test."""
        # Restore original environment
        for key, value in self._original_env.items():
            if value:
                os.environ[key] = value
            elif key in os.environ:
                del os.environ[key]

        # Reload config
        import config

        importlib.reload(config)

        # Clear provider registry
        ModelProviderRegistry._instance = None

    def _setup_environment(self, provider_config):
        """Helper to set up environment variables for testing."""
        # Clear all provider-related env vars first
        for key in ["GEMINI_API_KEY", "OPENAI_API_KEY", "XAI_API_KEY", "OPENROUTER_API_KEY", "CUSTOM_API_URL"]:
            if key in os.environ:
                del os.environ[key]

        # Set new values
        for key, value in provider_config.items():
            if value is not None:
                os.environ[key] = value

        # Always set auto mode for these tests
        os.environ["DEFAULT_MODEL"] = "auto"

        # Reload config to pick up changes
        import config

        importlib.reload(config)

        # Reload tools.base to ensure fresh state
        import tools.base

        importlib.reload(tools.base)

    def test_native_models_always_included(self):
        """Test that native models from MODEL_CAPABILITIES_DESC are always included."""
        self._setup_environment({})  # No providers configured

        tool = AnalyzeTool()
        models = tool._get_available_models()

        # All native models should be present
        native_models = [
            "flash",
            "pro",  # Gemini aliases
            "o3",
            "o3-mini",
            "o3-pro",
            "o4-mini",
            "o4-mini-high",  # OpenAI models
            "grok",
            "grok-3",
            "grok-3-fast",
            "grok3",
            "grokfast",  # X.AI models
            "gemini-2.5-flash-preview-05-20",
            "gemini-2.5-pro-preview-06-05",  # Full Gemini names
        ]

        for model in native_models:
            assert model in models, f"Native model {model} should always be in enum"

    def test_openrouter_models_with_api_key(self):
        """Test that OpenRouter models are included when API key is configured."""
        self._setup_environment({"OPENROUTER_API_KEY": "test-key"})

        tool = AnalyzeTool()
        models = tool._get_available_models()

        # Check for some known OpenRouter model aliases
        openrouter_models = ["opus", "sonnet", "haiku", "mistral-large", "deepseek"]
        found_count = sum(1 for m in openrouter_models if m in models)

        assert found_count >= 3, f"Expected at least 3 OpenRouter models, found {found_count}"
        assert len(models) > 20, f"With OpenRouter, should have many models, got {len(models)}"

    def test_openrouter_models_without_api_key(self):
        """Test that OpenRouter models are NOT included when API key is not configured."""
        self._setup_environment({})  # No OpenRouter key

        tool = AnalyzeTool()
        models = tool._get_available_models()

        # OpenRouter-specific models should NOT be present
        openrouter_only_models = ["opus", "sonnet", "haiku"]
        found_count = sum(1 for m in openrouter_only_models if m in models)

        assert found_count == 0, "OpenRouter models should not be included without API key"

    def test_custom_models_with_custom_url(self):
        """Test that custom models are included when CUSTOM_API_URL is configured."""
        self._setup_environment({"CUSTOM_API_URL": "http://localhost:11434"})

        tool = AnalyzeTool()
        models = tool._get_available_models()

        # Check for custom models (marked with is_custom=true)
        custom_models = ["local-llama", "llama3.2"]
        found_count = sum(1 for m in custom_models if m in models)

        assert found_count >= 1, f"Expected at least 1 custom model, found {found_count}"

    def test_custom_models_without_custom_url(self):
        """Test that custom models are NOT included when CUSTOM_API_URL is not configured."""
        self._setup_environment({})  # No custom URL

        tool = AnalyzeTool()
        models = tool._get_available_models()

        # Custom-only models should NOT be present
        custom_only_models = ["local-llama", "llama3.2"]
        found_count = sum(1 for m in custom_only_models if m in models)

        assert found_count == 0, "Custom models should not be included without CUSTOM_API_URL"

    def test_all_providers_combined(self):
        """Test that all models are included when all providers are configured."""
        self._setup_environment(
            {
                "GEMINI_API_KEY": "test-key",
                "OPENAI_API_KEY": "test-key",
                "XAI_API_KEY": "test-key",
                "OPENROUTER_API_KEY": "test-key",
                "CUSTOM_API_URL": "http://localhost:11434",
            }
        )

        tool = AnalyzeTool()
        models = tool._get_available_models()

        # Should have all types of models
        assert "flash" in models  # Gemini
        assert "o3" in models  # OpenAI
        assert "grok" in models  # X.AI
        assert "opus" in models or "sonnet" in models  # OpenRouter
        assert "local-llama" in models or "llama3.2" in models  # Custom

        # Should have many models total
        assert len(models) > 50, f"With all providers, should have 50+ models, got {len(models)}"

        # No duplicates
        assert len(models) == len(set(models)), "Should have no duplicate models"

    def test_mixed_provider_combinations(self):
        """Test various mixed provider configurations."""
        test_cases = [
            # (provider_config, expected_model_samples, min_count)
            (
                {"GEMINI_API_KEY": "test", "OPENROUTER_API_KEY": "test"},
                ["flash", "pro", "opus"],  # Gemini + OpenRouter models
                30,
            ),
            (
                {"OPENAI_API_KEY": "test", "CUSTOM_API_URL": "http://localhost"},
                ["o3", "o4-mini", "local-llama"],  # OpenAI + Custom models
                18,  # 14 native + ~4 custom models
            ),
            (
                {"XAI_API_KEY": "test", "OPENROUTER_API_KEY": "test"},
                ["grok", "grok-3", "opus"],  # X.AI + OpenRouter models
                30,
            ),
        ]

        for provider_config, expected_samples, min_count in test_cases:
            self._setup_environment(provider_config)

            tool = AnalyzeTool()
            models = tool._get_available_models()

            # Check expected models are present
            for model in expected_samples:
                if model in ["local-llama", "llama3.2"]:  # Custom models might not all be present
                    continue
                assert model in models, f"Expected {model} with config {provider_config}"

            # Check minimum count
            assert (
                len(models) >= min_count
            ), f"Expected at least {min_count} models with {provider_config}, got {len(models)}"

    def test_no_duplicates_with_overlapping_providers(self):
        """Test that models aren't duplicated when multiple providers offer the same model."""
        self._setup_environment(
            {
                "OPENAI_API_KEY": "test",
                "OPENROUTER_API_KEY": "test",  # OpenRouter also offers OpenAI models
            }
        )

        tool = AnalyzeTool()
        models = tool._get_available_models()

        # Count occurrences of each model
        model_counts = {}
        for model in models:
            model_counts[model] = model_counts.get(model, 0) + 1

        # Check no duplicates
        duplicates = {m: count for m, count in model_counts.items() if count > 1}
        assert len(duplicates) == 0, f"Found duplicate models: {duplicates}"

    def test_schema_enum_matches_get_available_models(self):
        """Test that the schema enum matches what _get_available_models returns."""
        self._setup_environment({"OPENROUTER_API_KEY": "test", "CUSTOM_API_URL": "http://localhost:11434"})

        tool = AnalyzeTool()

        # Get models from both methods
        available_models = tool._get_available_models()
        schema = tool.get_input_schema()
        schema_enum = schema["properties"]["model"]["enum"]

        # They should match exactly
        assert set(available_models) == set(schema_enum), "Schema enum should match _get_available_models output"
        assert len(available_models) == len(schema_enum), "Should have same number of models (no duplicates)"

    @pytest.mark.parametrize(
        "model_name,should_exist",
        [
            ("flash", True),  # Native Gemini
            ("o3", True),  # Native OpenAI
            ("grok", True),  # Native X.AI
            ("gemini-2.5-flash-preview-05-20", True),  # Full native name
            ("o4-mini-high", True),  # Native OpenAI variant
            ("grok-3-fast", True),  # Native X.AI variant
        ],
    )
    def test_specific_native_models_always_present(self, model_name, should_exist):
        """Test that specific native models are always present regardless of configuration."""
        self._setup_environment({})  # No providers

        tool = AnalyzeTool()
        models = tool._get_available_models()

        if should_exist:
            assert model_name in models, f"Native model {model_name} should always be present"
        else:
            assert model_name not in models, f"Model {model_name} should not be present"