package execx

import (
	"context"
	"fmt"
	"log"
	"os"
	"os/exec"
	"strings"
)

type Runner struct {
	DryRun     bool
	Kubeconfig string
	Logger     *log.Logger
}

func (r *Runner) Run(ctx context.Context, name string, args ...string) (string, error) {
	if r.DryRun {
		r.logf("DRY-RUN: %s %s", name, strings.Join(args, " "))
		return "", nil
	}

	cmd := exec.CommandContext(ctx, name, args...)
	cmd.Env = os.Environ()
	if r.Kubeconfig != "" {
		cmd.Env = append(cmd.Env, "KUBECONFIG="+r.Kubeconfig)
	}
	out, err := cmd.CombinedOutput()
	trimmed := strings.TrimSpace(string(out))
	if err != nil {
		if trimmed == "" {
			return "", fmt.Errorf("%s %s: %w", name, strings.Join(args, " "), err)
		}
		return trimmed, fmt.Errorf("%s %s: %w", name, strings.Join(args, " "), err)
	}
	return trimmed, nil
}

func (r *Runner) CommandExists(name string) bool {
	_, err := exec.LookPath(name)
	return err == nil
}

func (r *Runner) logf(format string, args ...any) {
	if r.Logger != nil {
		r.Logger.Printf(format, args...)
	}
}