package tests

import (
	"os"
	"path/filepath"
	"testing"

	"github.com/jfraeys/fetch_ml/internal/fileutil"
	tests "github.com/jfraeys/fetch_ml/tests/fixtures"
)

// TestMLProjectVariants tests different types of ML projects with zero-install workflow
func TestMLProjectVariants(t *testing.T) {
	testDir := t.TempDir()

	// Test 1: Scikit-learn project
	t.Run("ScikitLearnProject", func(t *testing.T) {
		tests.CreateMLProject(t, testDir, "sklearn_experiment", tests.ScikitLearnTemplate())
	})

	// Test 2: XGBoost project
	t.Run("XGBoostProject", func(t *testing.T) {
		tests.CreateMLProject(t, testDir, "xgboost_experiment", tests.XGBoostTemplate())
	})

	// Test 3: PyTorch project (deep learning)
	t.Run("PyTorchProject", func(t *testing.T) {
		tests.CreateMLProject(t, testDir, "pytorch_experiment", tests.PyTorchTemplate())
	})

	// Test 5: Traditional ML (statsmodels)
	t.Run("StatsModelsProject", func(t *testing.T) {
		tests.CreateMLProject(t, testDir, "statsmodels_experiment", tests.StatsModelsTemplate())
	})
}

// TestMLProjectCompatibility tests that all project types work with zero-install workflow
func TestMLProjectCompatibility(t *testing.T) {
	testDir := t.TempDir()

	// Test that all project types can be uploaded and processed
	projectTypes := []string{
		"sklearn_experiment",
		"xgboost_experiment",
		"pytorch_experiment",
		"tensorflow_experiment",
		"statsmodels_experiment",
	}

	for _, projectType := range projectTypes {
		t.Run(projectType+"_UploadTest", func(t *testing.T) {
			// Create experiment directory
			experimentDir := filepath.Join(testDir, projectType)
			if err := os.MkdirAll(experimentDir, 0750); err != nil {
				t.Fatalf("Failed to create experiment directory: %v", err)
			}

			// Create minimal files
			tEntrypoint := filepath.Join(experimentDir, "train.py")
			trainCode := `#!/usr/bin/env python3
import argparse, json, logging, time
from pathlib import Path

def main():
    parser = argparse.ArgumentParser()
    parser.add_argument("--output_dir", type=str, required=True)
    args = parser.parse_args()
    
    logging.basicConfig(level=logging.INFO)
    logger = logging.getLogger(__name__)
    
    logger.info(f"Training {projectType} model...")
    
    # Simulate training
    for epoch in range(3):
        logger.info(f"Epoch {epoch + 1}: training...")
        time.sleep(0.01)
    
    results = {"model_type": projectType, "status": "completed"}
    
    output_dir = Path(args.output_dir)
    output_dir.mkdir(parents=True, exist_ok=True)
    
    with open(output_dir / "results.json", "w") as f:
        json.dump(results, f)
    
    logger.info("Training complete!")

if __name__ == "__main__":
    main()
`

			if err := os.WriteFile(tEntrypoint, []byte(trainCode), 0600); err != nil {
				t.Fatalf("Failed to create train.py: %v", err)
			}

			// Create requirements.txt
			requirementsFile := filepath.Join(experimentDir, "requirements.txt")
			requirements := "# Framework-specific dependencies\n"
			if err := os.WriteFile(requirementsFile, []byte(requirements), 0600); err != nil {
				t.Fatalf("Failed to create requirements.txt: %v", err)
			}

			// Simulate upload process
			serverDir := filepath.Join(testDir, "server", "home", "mluser", "ml_jobs", "pending")
			jobDir := filepath.Join(serverDir, projectType+"_20231201_143022")

			if err := os.MkdirAll(jobDir, 0750); err != nil {
				t.Fatalf("Failed to create server directories: %v", err)
			}

			// Copy files
			files := []string{"train.py", "requirements.txt"}
			for _, file := range files {
				src := filepath.Join(experimentDir, file)
				dst := filepath.Join(jobDir, file)

				data, err := fileutil.SecureFileRead(src)
				if err != nil {
					t.Fatalf("Failed to read %s: %v", file, err)
				}

				if err := os.WriteFile(dst, data, 0600); err != nil {
					t.Fatalf("Failed to copy %s: %v", file, err)
				}
			}

			// Verify upload
			for _, file := range files {
				dst := filepath.Join(jobDir, file)
				if _, err := os.Stat(dst); os.IsNotExist(err) {
					t.Errorf("Uploaded file %s should exist for %s", file, projectType)
				}
			}
		})
	}
}