"""
Comprehensive coverage tests for whispercpp_model_info module.

Tests all functions and constants in the module.
"""

import subprocess
import unittest
from unittest.mock import MagicMock, patch


class TestComputeBackendClass(unittest.TestCase):
    """Test cases for ComputeBackend class."""

    def test_compute_backend_has_vulkan_constant(self):
        """Test that ComputeBackend has VULKAN constant."""
        from vocalinux.utils.whispercpp_model_info import ComputeBackend

        self.assertTrue(hasattr(ComputeBackend, "VULKAN"))
        self.assertEqual(ComputeBackend.VULKAN, "vulkan")

    def test_compute_backend_has_cuda_constant(self):
        """Test that ComputeBackend has CUDA constant."""
        from vocalinux.utils.whispercpp_model_info import ComputeBackend

        self.assertTrue(hasattr(ComputeBackend, "CUDA"))
        self.assertEqual(ComputeBackend.CUDA, "cuda")

    def test_compute_backend_has_cpu_constant(self):
        """Test that ComputeBackend has CPU constant."""
        from vocalinux.utils.whispercpp_model_info import ComputeBackend

        self.assertTrue(hasattr(ComputeBackend, "CPU"))
        self.assertEqual(ComputeBackend.CPU, "cpu")


class TestModelInfo(unittest.TestCase):
    """Test cases for model information constants."""

    def test_whispercpp_model_info_exists(self):
        """Test that WHISPERCPP_MODEL_INFO is defined."""
        from vocalinux.utils.whispercpp_model_info import WHISPERCPP_MODEL_INFO

        self.assertIsInstance(WHISPERCPP_MODEL_INFO, dict)
        self.assertGreater(len(WHISPERCPP_MODEL_INFO), 0)

    def test_whispercpp_model_info_contains_tiny(self):
        """Test that WHISPERCPP_MODEL_INFO contains tiny model."""
        from vocalinux.utils.whispercpp_model_info import WHISPERCPP_MODEL_INFO

        self.assertIn("tiny", WHISPERCPP_MODEL_INFO)

    def test_whispercpp_model_info_contains_base(self):
        """Test that WHISPERCPP_MODEL_INFO contains base model."""
        from vocalinux.utils.whispercpp_model_info import WHISPERCPP_MODEL_INFO

        self.assertIn("base", WHISPERCPP_MODEL_INFO)

    def test_whispercpp_model_info_contains_small(self):
        """Test that WHISPERCPP_MODEL_INFO contains small model."""
        from vocalinux.utils.whispercpp_model_info import WHISPERCPP_MODEL_INFO

        self.assertIn("small", WHISPERCPP_MODEL_INFO)

    def test_whispercpp_model_info_contains_medium(self):
        """Test that WHISPERCPP_MODEL_INFO contains medium model."""
        from vocalinux.utils.whispercpp_model_info import WHISPERCPP_MODEL_INFO

        self.assertIn("medium", WHISPERCPP_MODEL_INFO)

    def test_whispercpp_model_info_contains_large(self):
        """Test that WHISPERCPP_MODEL_INFO contains large model."""
        from vocalinux.utils.whispercpp_model_info import WHISPERCPP_MODEL_INFO

        self.assertIn("large", WHISPERCPP_MODEL_INFO)

    def test_model_info_has_size_mb(self):
        """Test that each model has size_mb field."""
        from vocalinux.utils.whispercpp_model_info import WHISPERCPP_MODEL_INFO

        for model_name, model_info in WHISPERCPP_MODEL_INFO.items():
            self.assertIn("size_mb", model_info, f"{model_name} missing size_mb")
            self.assertIsInstance(model_info["size_mb"], int)
            self.assertGreater(model_info["size_mb"], 0)

    def test_model_info_has_params(self):
        """Test that each model has params field."""
        from vocalinux.utils.whispercpp_model_info import WHISPERCPP_MODEL_INFO

        for model_name, model_info in WHISPERCPP_MODEL_INFO.items():
            self.assertIn("params", model_info, f"{model_name} missing params")
            self.assertIsInstance(model_info["params"], str)

    def test_model_info_has_desc(self):
        """Test that each model has desc field."""
        from vocalinux.utils.whispercpp_model_info import WHISPERCPP_MODEL_INFO

        for model_name, model_info in WHISPERCPP_MODEL_INFO.items():
            self.assertIn("desc", model_info, f"{model_name} missing desc")
            self.assertIsInstance(model_info["desc"], str)

    def test_model_info_has_url(self):
        """Test that each model has url field."""
        from vocalinux.utils.whispercpp_model_info import WHISPERCPP_MODEL_INFO

        for model_name, model_info in WHISPERCPP_MODEL_INFO.items():
            self.assertIn("url", model_info, f"{model_name} missing url")
            self.assertIsInstance(model_info["url"], str)
            self.assertTrue(model_info["url"].startswith("https://"))

    def test_available_models_list_exists(self):
        """Test that AVAILABLE_MODELS list exists."""
        from vocalinux.utils.whispercpp_model_info import AVAILABLE_MODELS

        self.assertIsInstance(AVAILABLE_MODELS, list)
        self.assertGreater(len(AVAILABLE_MODELS), 0)

    def test_available_models_contains_all_models(self):
        """Test that AVAILABLE_MODELS contains all defined models."""
        from vocalinux.utils.whispercpp_model_info import (
            AVAILABLE_MODELS,
            WHISPERCPP_MODEL_INFO,
        )

        self.assertEqual(set(AVAILABLE_MODELS), set(WHISPERCPP_MODEL_INFO.keys()))


class TestDetectVulkanSupport(unittest.TestCase):
    """Test cases for detect_vulkan_support function."""

    def test_detect_vulkan_support_returns_tuple(self):
        """Test that detect_vulkan_support returns a tuple."""
        from vocalinux.utils.whispercpp_model_info import detect_vulkan_support

        result = detect_vulkan_support()
        self.assertIsInstance(result, tuple)
        self.assertEqual(len(result), 2)

    def test_detect_vulkan_support_when_available(self):
        """Test Vulkan detection when vulkaninfo is available."""
        with patch("subprocess.run") as mock_run:
            mock_run.return_value = MagicMock(returncode=0, stdout="deviceName: Intel Arc\n")

            from vocalinux.utils.whispercpp_model_info import detect_vulkan_support

            is_available, device_name = detect_vulkan_support()

            self.assertTrue(is_available)
            self.assertIsNotNone(device_name)

    def test_detect_vulkan_support_when_unavailable(self):
        """Test Vulkan detection when vulkaninfo is not available."""
        with patch("subprocess.run") as mock_run:
            mock_run.side_effect = FileNotFoundError("vulkaninfo not found")

            from vocalinux.utils.whispercpp_model_info import detect_vulkan_support

            is_available, device_name = detect_vulkan_support()

            self.assertFalse(is_available)
            self.assertIsNone(device_name)

    def test_detect_vulkan_support_on_timeout(self):
        """Test Vulkan detection when command times out."""
        with patch("subprocess.run") as mock_run:
            mock_run.side_effect = subprocess.TimeoutExpired("vulkaninfo", 5)

            from vocalinux.utils.whispercpp_model_info import detect_vulkan_support

            is_available, device_name = detect_vulkan_support()

            self.assertFalse(is_available)
            self.assertIsNone(device_name)

    def test_detect_vulkan_support_on_error(self):
        """Test Vulkan detection when command returns error."""
        with patch("subprocess.run") as mock_run:
            mock_run.return_value = MagicMock(returncode=1, stdout="")

            from vocalinux.utils.whispercpp_model_info import detect_vulkan_support

            is_available, device_name = detect_vulkan_support()

            self.assertFalse(is_available)
            self.assertIsNone(device_name)


class TestDetectCudaSupport(unittest.TestCase):
    """Test cases for detect_cuda_support function."""

    def test_detect_cuda_support_returns_tuple(self):
        """Test that detect_cuda_support returns a tuple."""
        from vocalinux.utils.whispercpp_model_info import detect_cuda_support

        result = detect_cuda_support()
        self.assertIsInstance(result, tuple)
        self.assertEqual(len(result), 2)

    def test_detect_cuda_support_when_available(self):
        """Test CUDA detection when nvidia-smi is available."""
        with patch("subprocess.run") as mock_run:
            mock_run.return_value = MagicMock(returncode=0, stdout="NVIDIA RTX 3080, 10240 MiB\n")

            from vocalinux.utils.whispercpp_model_info import detect_cuda_support

            is_available, device_info = detect_cuda_support()

            self.assertTrue(is_available)
            self.assertIsNotNone(device_info)
            self.assertIn("RTX 3080", device_info)

    def test_detect_cuda_support_when_unavailable(self):
        """Test CUDA detection when nvidia-smi is not available."""
        with patch("subprocess.run") as mock_run:
            mock_run.side_effect = FileNotFoundError("nvidia-smi not found")

            from vocalinux.utils.whispercpp_model_info import detect_cuda_support

            is_available, device_info = detect_cuda_support()

            self.assertFalse(is_available)
            self.assertIsNone(device_info)

    def test_detect_cuda_support_on_timeout(self):
        """Test CUDA detection when command times out."""
        with patch("subprocess.run") as mock_run:
            mock_run.side_effect = subprocess.TimeoutExpired("nvidia-smi", 5)

            from vocalinux.utils.whispercpp_model_info import detect_cuda_support

            is_available, device_info = detect_cuda_support()

            self.assertFalse(is_available)
            self.assertIsNone(device_info)


class TestDetectCPUInfo(unittest.TestCase):
    """Test cases for detect_cpu_info function."""

    def test_detect_cpu_info_returns_string(self):
        """Test that detect_cpu_info returns a string."""
        from vocalinux.utils.whispercpp_model_info import detect_cpu_info

        result = detect_cpu_info()
        self.assertIsInstance(result, str)
        self.assertGreater(len(result), 0)

    def test_detect_cpu_info_from_proc_cpuinfo(self):
        """Test CPU detection from /proc/cpuinfo."""
        cpu_info_content = "model name : Intel(R) Core(TM) i7-10700K CPU @ 3.80GHz\n"

        with patch("builtins.open", create=True) as mock_open:
            mock_open.return_value.__enter__.return_value = iter([cpu_info_content])

            from vocalinux.utils.whispercpp_model_info import detect_cpu_info

            result = detect_cpu_info()

            self.assertIsInstance(result, str)
            self.assertGreater(len(result), 0)

    def test_detect_cpu_info_fallback_to_nproc(self):
        """Test CPU detection falls back to nproc."""
        with (
            patch("builtins.open", create=True, side_effect=Exception("No /proc/cpuinfo")),
            patch("subprocess.run") as mock_run,
        ):

            mock_run.return_value = MagicMock(returncode=0, stdout="8\n")

            from vocalinux.utils.whispercpp_model_info import detect_cpu_info

            result = detect_cpu_info()

            self.assertIsInstance(result, str)

    def test_detect_cpu_info_default_fallback(self):
        """Test CPU detection returns default when all methods fail."""
        with (
            patch("builtins.open", create=True, side_effect=Exception()),
            patch("subprocess.run", side_effect=Exception()),
        ):

            from vocalinux.utils.whispercpp_model_info import detect_cpu_info

            result = detect_cpu_info()

            self.assertEqual(result, "CPU")


class TestDetectComputeBackend(unittest.TestCase):
    """Test cases for detect_compute_backend function."""

    def test_detect_compute_backend_returns_tuple(self):
        """Test that detect_compute_backend returns a tuple."""
        from vocalinux.utils.whispercpp_model_info import detect_compute_backend

        result = detect_compute_backend()
        self.assertIsInstance(result, tuple)
        self.assertEqual(len(result), 2)

    def test_detect_compute_backend_prefers_vulkan(self):
        """Test that detect_compute_backend prefers Vulkan."""
        with (
            patch("vocalinux.utils.whispercpp_model_info.detect_vulkan_support") as mock_vulkan,
            patch("vocalinux.utils.whispercpp_model_info.detect_cuda_support") as mock_cuda,
        ):

            mock_vulkan.return_value = (True, "Intel Arc GPU")
            mock_cuda.return_value = (True, "NVIDIA RTX 3080 (10GB)")

            from vocalinux.utils.whispercpp_model_info import (
                ComputeBackend,
                detect_compute_backend,
            )

            backend, info = detect_compute_backend()

            self.assertEqual(backend, ComputeBackend.VULKAN)

    def test_detect_compute_backend_falls_back_to_cuda(self):
        """Test that detect_compute_backend falls back to CUDA."""
        with (
            patch("vocalinux.utils.whispercpp_model_info.detect_vulkan_support") as mock_vulkan,
            patch("vocalinux.utils.whispercpp_model_info.detect_cuda_support") as mock_cuda,
        ):

            mock_vulkan.return_value = (False, None)
            mock_cuda.return_value = (True, "NVIDIA RTX 3080 (10GB)")

            from vocalinux.utils.whispercpp_model_info import (
                ComputeBackend,
                detect_compute_backend,
            )

            backend, info = detect_compute_backend()

            self.assertEqual(backend, ComputeBackend.CUDA)

    def test_detect_compute_backend_falls_back_to_cpu(self):
        """Test that detect_compute_backend falls back to CPU."""
        with (
            patch("vocalinux.utils.whispercpp_model_info.detect_vulkan_support") as mock_vulkan,
            patch("vocalinux.utils.whispercpp_model_info.detect_cuda_support") as mock_cuda,
            patch("vocalinux.utils.whispercpp_model_info.detect_cpu_info") as mock_cpu,
        ):

            mock_vulkan.return_value = (False, None)
            mock_cuda.return_value = (False, None)
            mock_cpu.return_value = "Intel Core i7"

            from vocalinux.utils.whispercpp_model_info import (
                ComputeBackend,
                detect_compute_backend,
            )

            backend, info = detect_compute_backend()

            self.assertEqual(backend, ComputeBackend.CPU)


class TestGetRecommendedModel(unittest.TestCase):
    """Test cases for get_recommended_model function."""

    def test_get_recommended_model_returns_tuple(self):
        """Test that get_recommended_model returns a tuple."""
        mock_psutil = MagicMock()
        mock_psutil.virtual_memory.return_value = MagicMock(total=8 * (1024**3))
        with patch.dict("sys.modules", {"psutil": mock_psutil}):
            with patch(
                "vocalinux.utils.whispercpp_model_info.detect_compute_backend",
                return_value=("cpu", "Intel Core i7"),
            ):
                import importlib

                import vocalinux.utils.whispercpp_model_info as mod

                importlib.reload(mod)
                result = mod.get_recommended_model()
                self.assertIsInstance(result, tuple)
                self.assertEqual(len(result), 2)

    def test_get_recommended_model_with_vulkan_high_ram(self):
        """Test model recommendation with Vulkan and 8GB+ RAM."""
        import sys

        # Create a mock psutil module
        mock_psutil = MagicMock()
        mock_psutil.virtual_memory.return_value = MagicMock(total=8 * (1024**3))

        with patch.dict("sys.modules", {"psutil": mock_psutil}):
            with patch(
                "vocalinux.utils.whispercpp_model_info.detect_compute_backend"
            ) as mock_backend:
                mock_backend.return_value = ("vulkan", "Intel Arc A770")

                from vocalinux.utils.whispercpp_model_info import get_recommended_model

                model, reason = get_recommended_model()

                self.assertEqual(model, "small")

    def test_get_recommended_model_with_cuda_high_vram(self):
        """Test model recommendation with CUDA and high VRAM."""
        import sys

        mock_psutil = MagicMock()
        mock_psutil.virtual_memory.return_value = MagicMock(total=16 * (1024**3))

        with patch.dict("sys.modules", {"psutil": mock_psutil}):
            with patch(
                "vocalinux.utils.whispercpp_model_info.detect_compute_backend"
            ) as mock_backend:
                mock_backend.return_value = ("cuda", "NVIDIA RTX 4090 (24GB)")

                from vocalinux.utils.whispercpp_model_info import get_recommended_model

                model, reason = get_recommended_model()

                # High VRAM should recommend medium or higher
                self.assertIn(model, ["medium", "large", "small"])

    def test_get_recommended_model_with_cpu_high_ram(self):
        """Test model recommendation with CPU and 16GB+ RAM."""
        import sys

        mock_psutil = MagicMock()
        mock_psutil.virtual_memory.return_value = MagicMock(total=16 * (1024**3))

        with patch.dict("sys.modules", {"psutil": mock_psutil}):
            with patch(
                "vocalinux.utils.whispercpp_model_info.detect_compute_backend"
            ) as mock_backend:
                mock_backend.return_value = ("cpu", "Intel Core i7")

                from vocalinux.utils.whispercpp_model_info import get_recommended_model

                model, reason = get_recommended_model()

                self.assertEqual(model, "base")

    def test_get_recommended_model_with_cpu_medium_ram(self):
        """Test model recommendation with CPU and 8GB RAM."""
        import sys

        mock_psutil = MagicMock()
        mock_psutil.virtual_memory.return_value = MagicMock(total=8 * (1024**3))

        with patch.dict("sys.modules", {"psutil": mock_psutil}):
            with patch(
                "vocalinux.utils.whispercpp_model_info.detect_compute_backend"
            ) as mock_backend:
                mock_backend.return_value = ("cpu", "AMD Ryzen 5")

                from vocalinux.utils.whispercpp_model_info import get_recommended_model

                model, reason = get_recommended_model()

                self.assertEqual(model, "tiny")

    def test_get_recommended_model_with_cpu_low_ram(self):
        """Test model recommendation with CPU and 4GB RAM."""
        import sys

        mock_psutil = MagicMock()
        mock_psutil.virtual_memory.return_value = MagicMock(total=4 * (1024**3))

        with patch.dict("sys.modules", {"psutil": mock_psutil}):
            with patch(
                "vocalinux.utils.whispercpp_model_info.detect_compute_backend"
            ) as mock_backend:
                mock_backend.return_value = ("cpu", "Intel Atom")

                from vocalinux.utils.whispercpp_model_info import get_recommended_model

                model, reason = get_recommended_model()

                self.assertEqual(model, "tiny")

    def test_get_recommended_model_returns_valid_model_name(self):
        """Test that get_recommended_model returns a valid model name."""
        mock_psutil = MagicMock()
        mock_psutil.virtual_memory.return_value = MagicMock(total=8 * (1024**3))
        with patch.dict("sys.modules", {"psutil": mock_psutil}):
            with patch(
                "vocalinux.utils.whispercpp_model_info.detect_compute_backend",
                return_value=("cpu", "Intel Core i7"),
            ):
                import importlib

                import vocalinux.utils.whispercpp_model_info as mod

                importlib.reload(mod)
                model, reason = mod.get_recommended_model()
                self.assertIn(model, mod.AVAILABLE_MODELS)

    def test_get_recommended_model_returns_reason_string(self):
        """Test that get_recommended_model returns a reason string."""
        mock_psutil = MagicMock()
        mock_psutil.virtual_memory.return_value = MagicMock(total=8 * (1024**3))
        with patch.dict("sys.modules", {"psutil": mock_psutil}):
            with patch(
                "vocalinux.utils.whispercpp_model_info.detect_compute_backend",
                return_value=("cpu", "Intel Core i7"),
            ):
                import importlib

                import vocalinux.utils.whispercpp_model_info as mod

                importlib.reload(mod)
                model, reason = mod.get_recommended_model()
                self.assertIsInstance(reason, str)
                self.assertGreater(len(reason), 0)


class TestGetModelPath(unittest.TestCase):
    """Test cases for get_model_path function."""

    def test_get_model_path_returns_string(self):
        """Test that get_model_path returns a string."""
        from vocalinux.utils.whispercpp_model_info import get_model_path

        result = get_model_path("tiny")
        self.assertIsInstance(result, str)
        self.assertGreater(len(result), 0)

    def test_get_model_path_tiny(self):
        """Test get_model_path for tiny model."""
        from vocalinux.utils.whispercpp_model_info import get_model_path

        path = get_model_path("tiny")
        self.assertIn("ggml-tiny.bin", path)

    def test_get_model_path_base(self):
        """Test get_model_path for base model."""
        from vocalinux.utils.whispercpp_model_info import get_model_path

        path = get_model_path("base")
        self.assertIn("ggml-base.bin", path)

    def test_get_model_path_small(self):
        """Test get_model_path for small model."""
        from vocalinux.utils.whispercpp_model_info import get_model_path

        path = get_model_path("small")
        self.assertIn("ggml-small.bin", path)

    def test_get_model_path_medium(self):
        """Test get_model_path for medium model."""
        from vocalinux.utils.whispercpp_model_info import get_model_path

        path = get_model_path("medium")
        self.assertIn("ggml-medium.bin", path)

    def test_get_model_path_large_uses_v3(self):
        """Test get_model_path for large model uses v3 variant."""
        from vocalinux.utils.whispercpp_model_info import get_model_path

        path = get_model_path("large")
        self.assertIn("ggml-large-v3.bin", path)


class TestIsModelDownloaded(unittest.TestCase):
    """Test cases for is_model_downloaded function."""

    def test_is_model_downloaded_returns_bool(self):
        """Test that is_model_downloaded returns a boolean."""
        from vocalinux.utils.whispercpp_model_info import is_model_downloaded

        result = is_model_downloaded("tiny")
        self.assertIsInstance(result, bool)

    def test_is_model_downloaded_when_exists(self):
        """Test is_model_downloaded when model file exists."""
        with patch("os.path.exists", return_value=True):
            from vocalinux.utils.whispercpp_model_info import is_model_downloaded

            result = is_model_downloaded("base")
            self.assertTrue(result)

    def test_is_model_downloaded_when_not_exists(self):
        """Test is_model_downloaded when model file does not exist."""
        with patch("os.path.exists", return_value=False):
            from vocalinux.utils.whispercpp_model_info import is_model_downloaded

            result = is_model_downloaded("base")
            self.assertFalse(result)


class TestGetBackendDisplayName(unittest.TestCase):
    """Test cases for get_backend_display_name function."""

    def test_get_backend_display_name_returns_string(self):
        """Test that get_backend_display_name returns a string."""
        from vocalinux.utils.whispercpp_model_info import (
            ComputeBackend,
            get_backend_display_name,
        )

        result = get_backend_display_name(ComputeBackend.CPU)
        self.assertIsInstance(result, str)
        self.assertGreater(len(result), 0)

    def test_get_backend_display_name_vulkan(self):
        """Test display name for Vulkan backend."""
        from vocalinux.utils.whispercpp_model_info import (
            ComputeBackend,
            get_backend_display_name,
        )

        result = get_backend_display_name(ComputeBackend.VULKAN)
        self.assertEqual(result, "Vulkan GPU")

    def test_get_backend_display_name_cuda(self):
        """Test display name for CUDA backend."""
        from vocalinux.utils.whispercpp_model_info import (
            ComputeBackend,
            get_backend_display_name,
        )

        result = get_backend_display_name(ComputeBackend.CUDA)
        self.assertEqual(result, "NVIDIA CUDA")

    def test_get_backend_display_name_cpu(self):
        """Test display name for CPU backend."""
        from vocalinux.utils.whispercpp_model_info import (
            ComputeBackend,
            get_backend_display_name,
        )

        result = get_backend_display_name(ComputeBackend.CPU)
        self.assertEqual(result, "CPU")

    def test_get_backend_display_name_unknown(self):
        """Test display name for unknown backend."""
        from vocalinux.utils.whispercpp_model_info import get_backend_display_name

        result = get_backend_display_name("rocm")
        self.assertEqual(result, "ROCM")


if __name__ == "__main__":
    unittest.main()