package gupta

import (
	"fmt"
	"testing"
)

func TestHello(t *testing.T) {
	got := Hello()
	want := fmt.Sprintf("Welcome to gupta version %s", version)

	if got != want {
		t.Errorf("got %q want %q", got, want)
	}
}

func TestRunGupta(t *testing.T) {
	// test that we get CPU load
	got := make([]float64, 3)
	got[0], got[1], got[2] = Run(true, true, true, "", "")
	want := []float64{0.2, 0.2, 70.0}

	for i, v := range got {
		if v != want[i] {
			t.Errorf("got %v want %v", v, want[i])
		}
	}
	// here it makes sense to return some kind of data structure
	// with properties filled.
	// having a data structure it would be possible to format
	// it to json ...
}

func TestGuptaHasReport(t *testing.T) {
	// test we can get some report struct from gupta
	report := GuptaReport{
		cpuLoad:     0.2,
		cpuUsage:    0.2,
		memoryUsage: 70.0,
	}

	got := report.GetCPULoad()
	want := "0.20"

	if got != want {
		t.Errorf("got %v want %v", got, want)
	}

}

func TestGetCPULoad(t *testing.T) {
	cpustat := CPUStat{}
	cpustat.ReadInfo([]string{
		"cpu",
		"4705",
		"356",
		"584",
		"3699",
		"23",
		"23",
		"0",
		"0",
		"0",
		"0"})

	if cpustat.user != 4705 {
		t.Errorf("got %v want %v", cpustat.user, 4705)
	}
}

func TestCalculateCPUUsage(t *testing.T) {
	//               0    1    2     3     4     5      6     7       8     9     10
	//               cpu user nice system idle iowait  irq  softirq steal guest guest_nice
	procstatLine := "cpu 4705 356  584    3699   23    23     0       0     0    0"
	cpustat := NewCPUStat(procstatLine)

	if cpustat.user != 4705 {
		t.Errorf("got %v want %v", cpustat.user, 4705)
	}
}