package app

import (
	"encoding/json"
	"math/rand"
	"os"
	"os/exec"
	"path/filepath"
	"testing"

	"headshed/infctl-cli/config"
)

func TestMain(m *testing.M) {
	// Setup: Set TEST_ENV=true for all tests
	err := os.Setenv("TEST_ENV", "true")
	if err != nil {
		panic("Failed to set TEST_ENV")
	}

	// Run all tests
	code := m.Run()

	// Teardown: Unset TEST_ENV after all tests
	os.Unsetenv("TEST_ENV")

	// Exit with the test result code
	os.Exit(code)
}

func TestRunPipeline(t *testing.T) {
	// Create a temporary directory for test assets
	tempDir, err := os.MkdirTemp("", "smoke-test")
	if err != nil {
		t.Fatalf("Failed to create temp directory: %v", err)
	}
	defer os.RemoveAll(tempDir) // Cleanup after test

	// Create test scripts
	scripts := map[string]string{
		"good.sh":    "#!/bin/bash\necho 'Good script executed'\nexit 0",
		"warning.sh": "#!/bin/bash\necho 'Warning script executed'\nexit 0",
		"error.sh":   "#!/bin/bash\necho 'Error script executed'\nexit 1",
	}

	for name, content := range scripts {
		scriptPath := filepath.Join(tempDir, name)
		if err := os.WriteFile(scriptPath, []byte(content), 0755); err != nil {
			t.Fatalf("Failed to create script %s: %v", name, err)
		}
	}

	// Create a test JSON pipeline file
	pipeline := []PipelineStep{
		{Name: "Good Step", Function: "RunCommand", Params: []string{filepath.Join(tempDir, "good.sh")}, RetryCount: 0, ShouldAbort: false},
		{Name: "Warning Step", Function: "RunCommand", Params: []string{filepath.Join(tempDir, "warning.sh")}, RetryCount: 0, ShouldAbort: false},
		{Name: "Error Step", Function: "RunCommand", Params: []string{filepath.Join(tempDir, "error.sh")}, RetryCount: 0, ShouldAbort: true},
	}

	pipelineFile := filepath.Join(tempDir, "pipeline.json")
	pipelineData, err := json.Marshal(pipeline)
	if err != nil {
		t.Fatalf("Failed to marshal pipeline: %v", err)
	}
	if err := os.WriteFile(pipelineFile, pipelineData, 0644); err != nil {
		t.Fatalf("Failed to write pipeline file: %v", err)
	}

	// Set up AppState
	app := &AppState{
		Config: config.BaseConfig{
			DeploymentFile: pipelineFile,
		},
	}

	// Run the pipeline
	err = app.runPipeline(pipeline)
	if err == nil {
		t.Errorf("Expected error due to 'Error Step', but got none")
	}
}

func randomString(length int) string {
	const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
	b := make([]byte, length)
	for i := range b {
		b[i] = charset[rand.Intn(len(charset))]
	}
	return string(b)
}

func TestK3DNamespaceCreation(t *testing.T) {
	// Check if k3d is installed
	_, err := exec.LookPath("k3d")
	if err != nil {
		t.Fatal("k3d is not installed. Please install k3d to run this test.")
	}

	// Create a test cluster
	clusterName := "test-" + randomString(6)

	cmd := exec.Command("k3d", "cluster", "create", clusterName, "--servers", "1")
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	if err := cmd.Run(); err != nil {
		t.Fatalf("Failed to create k3d cluster: %v", err)
	}
	defer func() {
		// Clean up the test cluster
		cmd := exec.Command("k3d", "cluster", "delete", clusterName)
		cmd.Stdout = os.Stdout
		cmd.Stderr = os.Stderr
		if err := cmd.Run(); err != nil {
			t.Errorf("Failed to delete k3d cluster: %v", err)
		}
	}()

	// Create a temporary directory for the pipeline config
	tempDir, err := os.MkdirTemp("", "k3d-test")
	if err != nil {
		t.Fatalf("Failed to create temp directory: %v", err)
	}
	defer os.RemoveAll(tempDir)

	// Create a test JSON pipeline file
	pipeline := []PipelineStep{
		{Name: "Ensure Namespace Exists", Function: "k8sNamespaceExists", Params: []string{"test-namespace"}, RetryCount: 0, ShouldAbort: true},
	}
	pipelineFile := filepath.Join(tempDir, "pipeline.json")
	pipelineData, err := json.Marshal(pipeline)
	if err != nil {
		t.Fatalf("Failed to marshal pipeline: %v", err)
	}
	if err := os.WriteFile(pipelineFile, pipelineData, 0644); err != nil {
		t.Fatalf("Failed to write pipeline file: %v", err)
	}

	// Set up AppState
	app := &AppState{
		Config: config.BaseConfig{
			DeploymentFile: pipelineFile,
		},
	}

	// Run the pipeline
	err = app.runPipeline(pipeline)
	if err != nil {
		t.Fatalf("Pipeline execution failed: %v", err)
	}

	// Verify the namespace exists
	cmd = exec.Command("kubectl", "get", "ns", "test-namespace")
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	if err := cmd.Run(); err != nil {
		t.Fatalf("Namespace 'test-namespace' was not created: %v", err)
	}
}