/*
Copyright 2014 Google Inc. All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package openstack

import (
	"os"
	"strings"
	"testing"
)

func TestReadConfig(t *testing.T) {
	_, err := readConfig(nil)
	if err == nil {
		t.Errorf("Should fail when no config is provided: %s", err)
	}

	cfg, err := readConfig(strings.NewReader(`
[Global]
authurl = http://auth.url
username = user
`))
	if err != nil {
		t.Fatalf("Should succeed when a valid config is provided: %s", err)
	}
	if cfg.Global.AuthUrl != "http://auth.url" {
		t.Errorf("incorrect authurl: %s", cfg.Global.AuthUrl)
	}
}

func TestToAuthOptions(t *testing.T) {
	cfg := Config{}
	cfg.Global.Username = "user"
	// etc.

	ao := cfg.toAuthOptions()

	if !ao.AllowReauth {
		t.Errorf("Will need to be able to reauthenticate")
	}
	if ao.Username != cfg.Global.Username {
		t.Errorf("Username %s != %s", ao.Username, cfg.Global.Username)
	}
}

// This allows testing against an existing OpenStack install, using the
// standard OS_* OpenStack client environment variables.
func configFromEnv() (cfg Config, ok bool) {
	cfg.Global.AuthUrl = os.Getenv("OS_AUTH_URL")
	// gophercloud wants "provider" to point specifically at tokens URL
	if !strings.HasSuffix(cfg.Global.AuthUrl, "/tokens") {
		cfg.Global.AuthUrl += "/tokens"
	}

	cfg.Global.TenantId = os.Getenv("OS_TENANT_ID")
	// Rax/nova _insists_ that we don't specify both tenant ID and name
	if cfg.Global.TenantId == "" {
		cfg.Global.TenantName = os.Getenv("OS_TENANT_NAME")
	}

	cfg.Global.Username = os.Getenv("OS_USERNAME")
	cfg.Global.Password = os.Getenv("OS_PASSWORD")
	cfg.Global.ApiKey = os.Getenv("OS_API_KEY")
	cfg.Global.Region = os.Getenv("OS_REGION_NAME")

	ok = (cfg.Global.AuthUrl != "" &&
		cfg.Global.Username != "" &&
		(cfg.Global.Password != "" || cfg.Global.ApiKey != "") &&
		(cfg.Global.TenantId != "" || cfg.Global.TenantName != ""))

	return
}

func TestNewOpenStack(t *testing.T) {
	cfg, ok := configFromEnv()
	if !ok {
		t.Skipf("No config found in environment")
	}

	_, err := newOpenStack(cfg)
	if err != nil {
		t.Fatalf("Failed to construct/authenticate OpenStack: %s", err)
	}
}

func TestInstances(t *testing.T) {
	cfg, ok := configFromEnv()
	if !ok {
		t.Skipf("No config found in environment")
	}

	os, err := newOpenStack(cfg)
	if err != nil {
		t.Fatalf("Failed to construct/authenticate OpenStack: %s", err)
	}

	i, ok := os.Instances()
	if !ok {
		t.Fatalf("Instances() returned false")
	}

	srvs, err := i.List(".")
	if err != nil {
		t.Fatalf("Instances.List() failed: %s", err)
	}
	if len(srvs) == 0 {
		t.Fatalf("Instances.List() returned zero servers")
	}
	t.Logf("Found servers (%d): %s\n", len(srvs), srvs)

	ip, err := i.IPAddress(srvs[0])
	if err != nil {
		t.Fatalf("Instances.IPAddress(%s) failed: %s", srvs[0], err)
	}
	t.Logf("Found IPAddress(%s) = %s\n", srvs[0], ip)

	rsrcs, err := i.GetNodeResources(srvs[0])
	if err != nil {
		t.Fatalf("Instances.GetNodeResources(%s) failed: %s", srvs[0], err)
	}
	t.Logf("Found GetNodeResources(%s) = %s\n", srvs[0], rsrcs)
}