package main
import (
  "fmt"
  "math/rand"
  "time"
)

func main () {
  goRoutineTest()
}

func goRoutineTest() {

    workers := []Worker {{},{},{},{},{},{},{},{},{},{}}

    for i := 0; i < 10; i ++ {
        go count(i, &workers[i])                             // fires off 10 go-routines - count(i int, outside *Worker)
    }

    time.Sleep(time.Millisecond * 100000)                   // wait 100 seconds

    fmt.Println("\n\n")                                     // Print final result
    i := 0
    for i < 10 {
        fmt.Println(" Worker ", i, " : ", workers[i].counter, " counts  -",
                    " Time spent: ", workers[i].timeSpent, "\n")
        i++
    }
}

type Worker struct {                    // Struct declaration
    counter int
    timeSpent time.Duration
}

func NewWorker() Worker {               // constructor function
    worker := Worker{}
    worker.counter = 0
    worker.timeSpent = 0
    return worker
}

func count ( id int, outsider *Worker) {

    var tempTime time.Duration
    for outsider.counter < 1000 {
        fmt.Println("worker ", id, " : ", outsider.counter)

        tempTime = time.Millisecond *  time.Duration(rand.Intn(10000))  // Random wait for each thread
        time.Sleep(tempTime)

        outsider.timeSpent += tempTime      // Sum total time spent
        outsider.counter ++
    }
}