package main

import (
	"log"
	"os"

	"golang.org/x/term"
)

// getTerminalWidth returns the width of the active terminal.
// If the output is not an interactive terminal (e.g., it's being piped to a file
// or another command), it returns a default width and false.
func getTerminalWidth() (int, bool) {
	// term.IsTerminal checks if the given file descriptor is connected to a terminal.
	// We use os.Stdout.Fd() to check the standard output.
	if term.IsTerminal(int(os.Stdout.Fd())) {
		// term.GetSize returns the dimensions of the given terminal.
		width, _, err := term.GetSize(int(os.Stdout.Fd()))
		if err != nil {
			// If we can't get the size for some reason, fall back to the default.
			log.Printf("could not get terminal size: %v", err)
			return 120, false
		}
		return width, true
	}

	// If it's not a terminal, return the default width.
	return 120, false
}

// truncateString shortens a string to the specified length, adding an ellipsis if truncated.
func truncateString(s string, maxLength int) string {
	if len(s) <= maxLength {
		return s
	}
	// Subtract 3 to make room for the ellipsis "..."
	if maxLength < 3 {
		return "..."
	}
	return s[:maxLength-3] + "..."
}