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// Copyright (c) 2013, SoundCloud Ltd.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Source code and contact info at http://github.com/soundcloud/visor

package visor

import (
"testing"
)

func visorSetup(root string) *Store {
s, err := DialUri(DefaultUri, root)
if err != nil {
panic(err)
}
err = s.reset()
if err != nil {
panic(err)
}
s, err = s.FastForward()
if err != nil {
panic(err)
}
s, err = s.Init()
if err != nil {
panic(err)
}

return s
}

func TestScaleErrors(t *testing.T) {
s := visorSetup("/scale-error-test")
scale := 5

app := genApp(s)
rev := genRevision(app)
proc := genProc(app, "web")
env := genEnv(app, "default", map[string]string{})

// Scale up

_, _, err := s.Scale("fnord", rev.Ref, proc.Name, env.Ref, scale)
if err == nil {
t.Error("expected error (bad arguments)")
}
_, _, err = s.Scale(app.Name, "fnord", proc.Name, env.Ref, scale)
if err == nil {
t.Error("expected error (bad arguments)")
}
_, _, err = s.Scale(app.Name, rev.Ref, "fnord", env.Ref, scale)
if err == nil {
t.Error("expected error (bad arguments)")
}
_, _, err = s.Scale(app.Name, rev.Ref, proc.Name, "fnord", scale)
if err == nil {
t.Error("expected error (bad arguments)")
}
}

func TestScaleUp(t *testing.T) {
s := visorSetup("/scale-test")
scale := 5

app := genApp(s)
rev := genRevision(app)
proc := genProc(app, "web")
env := genEnv(app, "default", map[string]string{})

_, current, err := s.Scale(app.Name, rev.Ref, proc.Name, env.Ref, scale)
if err != nil {
t.Fatal(err)
}
if current != 0 {
t.Fatalf("expected current scale to = 0, but is %d", current)
}
if err != nil {
t.Fatal(err)
}

scale1, _, err := s.GetScale(app.Name, rev.Ref, proc.Name)
if err != nil {
t.Fatal(err)
}
if scale1 != scale {
t.Fatalf("expected %d instances, got %d", scale, scale1)
}
}

func TestScaleDown(t *testing.T) {
s := visorSetup("/scale-test")
scale := 5

app := genApp(s)
rev := genRevision(app)
proc := genProc(app, "downer")
env1 := genEnv(app, "to-scale", map[string]string{})
env2 := genEnv(app, "not-to-scale", map[string]string{})

ins := []*Instance{}

for i := 0; i < scale; i++ {
i, err := s.RegisterInstance(app.Name, rev.Ref, proc.Name, env1.Ref)
if err != nil {
t.Fatal(err)
}
ins = append(ins, i)
}

for i := 0; i < 3; i++ {
i, err := s.RegisterInstance(app.Name, rev.Ref, proc.Name, env2.Ref)
if err != nil {
t.Fatal(err)
}
ins = append(ins, i)
}

err := setInstancesToStarted(ins)
if err != nil {
t.Fatal(err)
}

_, _, err = s.Scale(app.Name, rev.Ref, proc.Name, env1.Ref, -1)
if err == nil {
t.Error("expected error on a non-positive scaling factor")
}

tickets, _, err := s.Scale(app.Name, rev.Ref, proc.Name, env1.Ref, 0)
if err != nil {
t.Fatal(err)
}

if len(tickets) != scale {
t.Fatalf("expected %d instances, got %d", scale, len(tickets))
}

_, _, err = s.Scale(app.Name, rev.Ref, proc.Name, env1.Ref, 0)
if err == nil {
t.Fatal("expected error when scaling down instances twice")
}
}

func TestGetScale(t *testing.T) {
s := visorSetup("/getscale-test")
scale := 5

app := genApp(s)
rev := genRevision(app)
proc := genProc(app, "scaleproc")
env := genEnv(app, "default", map[string]string{})

scale, _, err := s.GetScale(app.Name, rev.Ref, proc.Name)
if err != nil {
t.Error(err)
}
if scale != 0 {
t.Error("expected initial scale of 0")
}

_, _, err = s.Scale(app.Name, rev.Ref, proc.Name, env.Ref, 9)
if err != nil {
t.Fatal(err)
}
s, err = s.FastForward()
if err != nil {
t.Fatal(err)
}

scale, _, err = s.GetScale(app.Name, rev.Ref, proc.Name)
if err != nil {
t.Error(err)
}
if scale != 9 {
t.Errorf("expected scale of 9, got %d", scale)
}

scale, _, err = s.GetScale("invalid-app", rev.Ref, proc.Name)
if scale != 0 {
t.Errorf("expected scale to be 0")
}
}

func TestValidateInput(t *testing.T) {
invalidInputs := []string{
"",
" ",
"with space",
"with_underscore",
}
for _, input := range invalidInputs {
err := validateInput(input)
if err == nil || !IsErrInvalidArgument(err) {
t.Errorf("expected '%s' to not validate: %s", input, err)
}
}

validInputs := []string{
"valid",
"valid-with-scores",
"valid.with.dots",
"0123456789",
}
for _, input := range validInputs {
err := validateInput(input)
if err != nil {
t.Errorf("expected '%s' to validate: %s", input, err)
}
}
}

func setInstancesToStarted(ins []*Instance) error {
host := "127.0.0.1"
hostname := "localhost"
port := 5000
tPort := 5001

for _, i := range ins {
i, err := i.Claim(host)
if err != nil {
return err
}
i, err = i.Started(host, hostname, port, tPort)
if err != nil {
return err
}
port += 1
}
return nil
}
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