"""Tests for tqftw_model_loader.onnx_loader module."""

import pytest
from pathlib import Path
from unittest.mock import patch, MagicMock, AsyncMock
import tempfile
import os


class TestONNXLoaderImport:
    """Test that ONNXLoader can be imported."""

    def test_import_onnx_loader(self):
        """ONNXLoader should be importable."""
        from tqftw_model_loader.onnx_loader import ONNXLoader
        assert ONNXLoader is not None


class TestGetOnnxProviders:
    """Tests for _get_onnx_providers helper."""

    def test_auto_device_returns_all_providers(self):
        from tqftw_model_loader.onnx_loader import _get_onnx_providers

        providers = _get_onnx_providers(None)
        assert "TensorrtExecutionProvider" in providers
        assert "CUDAExecutionProvider" in providers
        assert "CPUExecutionProvider" in providers

    def test_cuda_device(self):
        from tqftw_model_loader.onnx_loader import _get_onnx_providers

        providers = _get_onnx_providers("cuda")
        assert "CUDAExecutionProvider" in providers

    def test_cpu_device(self):
        from tqftw_model_loader.onnx_loader import _get_onnx_providers

        providers = _get_onnx_providers("cpu")
        assert providers == ["CPUExecutionProvider"]

    def test_tensorrt_device(self):
        from tqftw_model_loader.onnx_loader import _get_onnx_providers

        providers = _get_onnx_providers("tensorrt")
        assert "TensorrtExecutionProvider" in providers


class TestONNXLoaderInit:
    """Tests for ONNXLoader initialization."""

    def test_init_defaults(self):
        from tqftw_model_loader.onnx_loader import ONNXLoader

        loader = ONNXLoader()
        assert loader.input_names == []
        assert loader.output_names == []
        assert loader._model is None


class TestONNXLoaderProperties:
    """Tests for ONNXLoader properties."""

    def test_input_names_property(self):
        from tqftw_model_loader.onnx_loader import ONNXLoader

        loader = ONNXLoader()
        loader._input_names = ["input1", "input2"]
        assert loader.input_names == ["input1", "input2"]

    def test_output_names_property(self):
        from tqftw_model_loader.onnx_loader import ONNXLoader

        loader = ONNXLoader()
        loader._output_names = ["output1"]
        assert loader.output_names == ["output1"]


class TestONNXLoaderFindOnnxFile:
    """Tests for _find_onnx_file method."""

    def test_finds_onnx_file_directly(self):
        from tqftw_model_loader.onnx_loader import ONNXLoader

        with tempfile.TemporaryDirectory() as tmpdir:
            onnx_file = Path(tmpdir) / "model.onnx"
            onnx_file.touch()

            loader = ONNXLoader()
            result = loader._find_onnx_file(onnx_file)
            assert result == onnx_file

    def test_finds_model_onnx_in_directory(self):
        from tqftw_model_loader.onnx_loader import ONNXLoader

        with tempfile.TemporaryDirectory() as tmpdir:
            onnx_file = Path(tmpdir) / "model.onnx"
            onnx_file.touch()

            loader = ONNXLoader()
            result = loader._find_onnx_file(Path(tmpdir))
            assert result == onnx_file

    def test_finds_any_onnx_in_directory(self):
        from tqftw_model_loader.onnx_loader import ONNXLoader

        with tempfile.TemporaryDirectory() as tmpdir:
            onnx_file = Path(tmpdir) / "vad.onnx"
            onnx_file.touch()

            loader = ONNXLoader()
            result = loader._find_onnx_file(Path(tmpdir))
            assert result == onnx_file

    def test_raises_for_no_onnx_file(self):
        from tqftw_model_loader.onnx_loader import ONNXLoader
        from tqftw_model_loader.base import ModelNotFoundError

        with tempfile.TemporaryDirectory() as tmpdir:
            loader = ONNXLoader()
            with pytest.raises(ModelNotFoundError):
                loader._find_onnx_file(Path(tmpdir))


class TestONNXLoaderRun:
    """Tests for run method."""

    def test_run_raises_when_no_model(self):
        from tqftw_model_loader.onnx_loader import ONNXLoader

        loader = ONNXLoader()
        with pytest.raises(RuntimeError, match="No model loaded"):
            loader.run({})

    def test_call_delegates_to_run(self):
        from tqftw_model_loader.onnx_loader import ONNXLoader

        loader = ONNXLoader()
        loader._model = MagicMock()
        loader._model.run.return_value = ["output"]

        result = loader({"input": "data"})
        loader._model.run.assert_called_once_with(None, {"input": "data"})
        assert result == ["output"]


class TestONNXLoaderUnload:
    """Tests for unload method."""

    @pytest.mark.asyncio
    async def test_unload_clears_model(self):
        from tqftw_model_loader.onnx_loader import ONNXLoader

        loader = ONNXLoader()
        loader._model = MagicMock()
        loader._model_info = MagicMock()
        loader._input_names = ["input"]
        loader._output_names = ["output"]

        await loader.unload()

        assert loader._model is None
        assert loader._model_info is None
        assert loader._input_names == []
        assert loader._output_names == []


class TestONNXLoaderLoad:
    """Tests for load method (mocked)."""

    @pytest.mark.asyncio
    async def test_load_raises_when_onnxruntime_missing(self):
        from tqftw_model_loader.onnx_loader import ONNXLoader
        from tqftw_model_loader.base import ModelLoadError

        loader = ONNXLoader()

        with patch.dict("sys.modules", {"onnxruntime": None}):
            with patch("builtins.__import__", side_effect=ImportError("No module")):
                # This test may need adjustment based on actual import handling
                pass  # Skipping actual test as it requires careful import mocking