package injection

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

// getClipboard retrieves the current clipboard content using wl-paste
func getClipboard(ctx context.Context, timeout time.Duration) (string, error) {
	ctx, cancel := context.WithTimeout(ctx, timeout)
	defer cancel()

	cmd := exec.CommandContext(ctx, "wl-paste", "--no-newline")
	output, err := cmd.Output()
	if err != nil {
		// wl-paste returns non-zero exit code if clipboard is empty or unavailable
		// This is normal behavior, so we return empty string instead of error
		return "", nil
	}

	return string(output), nil
}

// setClipboard sets the clipboard content using wl-copy
func setClipboard(ctx context.Context, text string, timeout time.Duration) error {
	ctx, cancel := context.WithTimeout(ctx, timeout)
	defer cancel()

	cmd := exec.CommandContext(ctx, "wl-copy")
	cmd.Stdin = strings.NewReader(text)

	if err := cmd.Run(); err != nil {
		return fmt.Errorf("wl-copy failed: %w", err)
	}

	return nil
}

// checkClipboardAvailable checks if wl-clipboard tools are available
func checkClipboardAvailable() error {
	if _, err := exec.LookPath("wl-copy"); err != nil {
		return fmt.Errorf("wl-copy not found: %w (install wl-clipboard)", err)
	}

	if _, err := exec.LookPath("wl-paste"); err != nil {
		return fmt.Errorf("wl-paste not found: %w (install wl-clipboard)", err)
	}

	return nil
}