package execx

import (
	"bytes"
	"context"
	"log"
	"strings"
	"testing"
)

// TestRunnerDryRun runs one orchestration or CLI step.
// Signature: TestRunnerDryRun(t *testing.T).
// Why: keeps behavior explicit so startup/shutdown workflows remain maintainable as services evolve.
func TestRunnerDryRun(t *testing.T) {
	var buf bytes.Buffer
	r := &Runner{
		DryRun: true,
		Logger: log.New(&buf, "", 0),
	}
	out, err := r.Run(context.Background(), "echo", "hello")
	if err != nil {
		t.Fatalf("dry-run should not fail: %v", err)
	}
	if out != "" {
		t.Fatalf("expected empty dry-run output, got %q", out)
	}
	if !strings.Contains(buf.String(), "DRY-RUN: echo hello") {
		t.Fatalf("expected dry-run log entry, got %q", buf.String())
	}
}

// TestRunnerRunSuccess runs one orchestration or CLI step.
// Signature: TestRunnerRunSuccess(t *testing.T).
// Why: keeps behavior explicit so startup/shutdown workflows remain maintainable as services evolve.
func TestRunnerRunSuccess(t *testing.T) {
	r := &Runner{}
	out, err := r.Run(context.Background(), "sh", "-c", "printf ok")
	if err != nil {
		t.Fatalf("expected command success: %v", err)
	}
	if out != "ok" {
		t.Fatalf("expected output ok, got %q", out)
	}
}

// TestRunnerRunFailureIncludesOutput runs one orchestration or CLI step.
// Signature: TestRunnerRunFailureIncludesOutput(t *testing.T).
// Why: keeps behavior explicit so startup/shutdown workflows remain maintainable as services evolve.
func TestRunnerRunFailureIncludesOutput(t *testing.T) {
	r := &Runner{}
	out, err := r.Run(context.Background(), "sh", "-c", "echo boom >&2; exit 1")
	if err == nil {
		t.Fatalf("expected command failure")
	}
	if strings.TrimSpace(out) != "boom" {
		t.Fatalf("expected stderr to be preserved, got %q", out)
	}
}

// TestRunnerCommandExists runs one orchestration or CLI step.
// Signature: TestRunnerCommandExists(t *testing.T).
// Why: keeps behavior explicit so startup/shutdown workflows remain maintainable as services evolve.
func TestRunnerCommandExists(t *testing.T) {
	r := &Runner{}
	if !r.CommandExists("sh") {
		t.Fatalf("expected shell command to exist")
	}
}