// file: gotop.go
package main

import (
	"log"
	"sort"
	// "time"

	"github.com/pkg/profile"
	"github.com/shirou/gopsutil/process"
)

type ProcInfo struct {
	Name  string
	Usage float64
}

type ByUsage []ProcInfo

func (a ByUsage) Len() int      { return len(a) }
func (a ByUsage) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a ByUsage) Less(i, j int) bool {
	return a[i].Usage > a[j].Usage
}

func main() {

	defer profile.Start(profile.CPUProfile).Stop()

	for i := 0; i < 2; i++ {

		processes, _ := process.Processes()

		var procinfos []ProcInfo
		for _, p := range processes {
			a, _ := p.CPUPercent()
			n, _ := p.Name()
			procinfos = append(procinfos, ProcInfo{n, a})
		}
		sort.Sort(ByUsage(procinfos))

		for _, p := range procinfos[:5] {
			log.Printf("   %s -> %f", p.Name, p.Usage)
		}
		//  time.Sleep(3 * time.Second)
	}
}