package e2e

import (
	"fmt"
	"os"
	"os/exec"
	"strings"
	"testing"
)

func TestConfigPropagation(t *testing.T) {
	binaryPath, err := GetBinaryPath()
	if err != nil {
		t.Skipf("Skipping test: %v", err)
	}

	tmpRuntimeDir := t.TempDir()
	profile := "config-test-vpn"

	// Test 1: Non-isolated configuration
	cmd := exec.Command(binaryPath, "show-config", "--profile", profile)
	cmd.Env = append(os.Environ(), fmt.Sprintf("XDG_RUNTIME_DIR=%s", tmpRuntimeDir))
	out, err := cmd.CombinedOutput()
	if err != nil {
		t.Fatalf("show-config failed: %v\nOutput: %s", err, string(out))
	}

	output := string(out)
	expectedBase := tmpRuntimeDir
	expectedPids := fmt.Sprintf("%s/profiles/%s/pids", tmpRuntimeDir, profile)

	if !strings.Contains(output, fmt.Sprintf("Runtime Base:  %s", expectedBase)) {
		t.Errorf("Expected Runtime Base %s in output: %s", expectedBase, output)
	}
	if !strings.Contains(output, fmt.Sprintf("PIDs Path:     %s", expectedPids)) {
		t.Errorf("Expected PIDs Path %s in output: %s", expectedPids, output)
	}

	// Test 2: Configuration after bootstrap (Isolated)
	// We use 'test-ns' as a way to run a command that we know is isolated.
	// Actually, we can just run 'show-config' but the current 'Route'
	// handles 'show-config' BEFORE the bootstrap.
	// To test isolated config, we can't use 'show-config' because it's a diagnostic
	// command designed to run outside isolation.

	// To verify what an isolated process sees, we can use a target command
	// that prints the environment.
	cmdIsolated := exec.Command(binaryPath, "--profile", profile, "--", "sh", "-c", "echo $XDG_RUNTIME_DIR")
	cmdIsolated.Env = append(os.Environ(), fmt.Sprintf("XDG_RUNTIME_DIR=%s", tmpRuntimeDir))
	outIso, err := cmdIsolated.CombinedOutput()
	if err != nil {
		t.Fatalf("Isolated command failed: %v\nOutput: %s", err, string(outIso))
	}

	if !strings.Contains(string(outIso), expectedBase) {
		t.Errorf("Expected isolated process to see XDG_RUNTIME_DIR=%s, got: %s", expectedBase, string(outIso))
	}
}