package factory_test

import (
	"log/slog"
	"testing"

	"github.com/jfraeys/fetch_ml/internal/container"
	"github.com/jfraeys/fetch_ml/internal/logging"
	"github.com/jfraeys/fetch_ml/internal/tracking"
	"github.com/jfraeys/fetch_ml/internal/tracking/factory"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

// helper to create a test logger
func testLogger() *logging.Logger {
	return logging.NewLogger(slog.LevelInfo, false)
}

// TestNewPluginLoader tests plugin loader creation
func TestNewPluginLoader(t *testing.T) {
	t.Parallel()

	logger := testLogger()
	podman := &container.PodmanManager{}

	loader := factory.NewPluginLoader(logger, podman)
	require.NotNil(t, loader)
}

// TestRegisterFactory tests factory registration
func TestRegisterFactory(t *testing.T) {
	t.Parallel()

	logger := testLogger()
	podman := &container.PodmanManager{}

	loader := factory.NewPluginLoader(logger, podman)

	// Register a custom factory
	customFactory := func(l *logging.Logger, p *container.PodmanManager, cfg factory.PluginConfig) (tracking.Plugin, error) {
		return nil, nil // Return nil for simplicity
	}

	loader.RegisterFactory("custom", customFactory)
	// Should not panic
}

// TestLoadPluginsEmpty tests loading empty plugins
func TestLoadPluginsEmpty(t *testing.T) {
	t.Parallel()

	logger := testLogger()
	podman := &container.PodmanManager{}

	loader := factory.NewPluginLoader(logger, podman)
	registry := tracking.NewRegistry(logger)

	emptyPlugins := make(map[string]factory.PluginConfig)
	err := loader.LoadPlugins(emptyPlugins, registry)
	require.NoError(t, err)
}

// TestLoadPluginsDisabled tests that disabled plugins are skipped
func TestLoadPluginsDisabled(t *testing.T) {
	t.Parallel()

	logger := testLogger()
	podman := &container.PodmanManager{}

	loader := factory.NewPluginLoader(logger, podman)
	registry := tracking.NewRegistry(logger)

	plugins := map[string]factory.PluginConfig{
		"mlflow": {
			Enabled: false,
			Image:   "mlflow:latest",
		},
	}

	err := loader.LoadPlugins(plugins, registry)
	require.NoError(t, err)
	// Disabled plugin should not be registered
}

// TestLoadPluginsUnknown tests that unknown plugins are skipped with warning
func TestLoadPluginsUnknown(t *testing.T) {
	t.Parallel()

	logger := testLogger()
	podman := &container.PodmanManager{}

	loader := factory.NewPluginLoader(logger, podman)
	registry := tracking.NewRegistry(logger)

	plugins := map[string]factory.PluginConfig{
		"unknown-plugin": {
			Enabled: true,
			Image:   "unknown:latest",
		},
	}

	err := loader.LoadPlugins(plugins, registry)
	require.NoError(t, err)
	// Unknown plugin should be skipped but not cause error
}

// TestPluginConfigStructure tests plugin config fields
func TestPluginConfigStructure(t *testing.T) {
	t.Parallel()

	config := factory.PluginConfig{
		Settings:     map[string]any{"key": "value"},
		Image:        "test-image:latest",
		Mode:         "sidecar",
		LogBasePath:  "/var/log",
		ArtifactPath: "/artifacts",
		Enabled:      true,
	}

	assert.Equal(t, "test-image:latest", config.Image)
	assert.Equal(t, "sidecar", config.Mode)
	assert.Equal(t, "/var/log", config.LogBasePath)
	assert.Equal(t, "/artifacts", config.ArtifactPath)
	assert.True(t, config.Enabled)
	assert.Equal(t, "value", config.Settings["key"])
}

// TestPluginFactoryType tests the factory function type
func TestPluginFactoryType(t *testing.T) {
	t.Parallel()

	// Verify factory function signature
	var _ factory.PluginFactory = func(
		logger *logging.Logger,
		podman *container.PodmanManager,
		cfg factory.PluginConfig,
	) (tracking.Plugin, error) {
		return nil, nil
	}
}

// TestLoadPluginsMLflow tests loading MLflow plugin config
func TestLoadPluginsMLflow(t *testing.T) {
	t.Parallel()

	logger := testLogger()
	podman := &container.PodmanManager{}

	loader := factory.NewPluginLoader(logger, podman)
	registry := tracking.NewRegistry(logger)

	// MLflow plugin config (disabled to avoid actual container creation)
	plugins := map[string]factory.PluginConfig{
		"mlflow": {
			Enabled:      false, // Disabled to avoid container operations
			Image:        "mlflow:latest",
			ArtifactPath: "/artifacts",
			Mode:         "sidecar",
			Settings:     map[string]any{"port": 5000},
		},
	}

	err := loader.LoadPlugins(plugins, registry)
	require.NoError(t, err)
}

// TestLoadPluginsTensorBoard tests loading TensorBoard plugin config
func TestLoadPluginsTensorBoard(t *testing.T) {
	t.Parallel()

	logger := testLogger()
	podman := &container.PodmanManager{}

	loader := factory.NewPluginLoader(logger, podman)
	registry := tracking.NewRegistry(logger)

	// TensorBoard plugin config (disabled)
	plugins := map[string]factory.PluginConfig{
		"tensorboard": {
			Enabled:     false,
			Image:       "tensorboard:latest",
			LogBasePath: "/logs",
			Mode:        "sidecar",
		},
	}

	err := loader.LoadPlugins(plugins, registry)
	require.NoError(t, err)
}

// TestLoadPluginsWandb tests loading Wandb plugin config
func TestLoadPluginsWandb(t *testing.T) {
	t.Parallel()

	logger := testLogger()
	podman := &container.PodmanManager{}

	loader := factory.NewPluginLoader(logger, podman)
	registry := tracking.NewRegistry(logger)

	// Wandb plugin config (disabled)
	plugins := map[string]factory.PluginConfig{
		"wandb": {
			Enabled: true, // Wandb doesn't require podman
			Image:   "wandb:latest",
			Mode:    "native",
		},
	}

	err := loader.LoadPlugins(plugins, registry)
	require.NoError(t, err)
}