package main

import (
	"fmt"
	"time"
)

// simulateLongRunningOperation simulates a task that might take a while.
// It sends a result on the 'result' channel after a random delay.
func simulateLongRunningOperation(result chan<- string, id int) {
	delay := time.Duration(id%3+1) * time.Second // 1, 2, or 3 seconds
	time.Sleep(delay)
	result <- fmt.Sprintf("Operation %d completed in %v", id, delay)
}

func main() {
	fmt.Println("Starting operation timeout demonstration...")

	for i := 1; i <= 5; i++ {
		resultChan := make(chan string, 1) // Buffered channel for the result
		timeout := 2 * time.Second         // Set a timeout of 2 seconds for each operation

		go simulateLongRunningOperation(resultChan, i)

		select {
		case res := <-resultChan:
			fmt.Printf("  Operation %d: %s
", i, res)
		case <-time.After(timeout):
			fmt.Printf("  Operation %d: TIMEOUT after %v!
", i, timeout)
		}
		time.Sleep(100 * time.Millisecond) // Small delay between tests
	}

	fmt.Println("Demonstration finished.")
}