/*
   Copyright 2014 CoreOS, Inc.

   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 cloudsigma

import (
	"encoding/json"
	"reflect"
	"testing"
)

type fakeCepgoClient struct {
	raw  []byte
	meta map[string]string
	keys map[string]interface{}
	err  error
}

func (f *fakeCepgoClient) All() (interface{}, error) {
	return f.keys, f.err
}

func (f *fakeCepgoClient) Key(key string) (interface{}, error) {
	return f.keys[key], f.err
}

func (f *fakeCepgoClient) Meta() (map[string]string, error) {
	return f.meta, f.err
}

func (f *fakeCepgoClient) FetchRaw(key string) ([]byte, error) {
	return f.raw, f.err
}

func TestServerContextFetchMetadata(t *testing.T) {
	var metadata struct {
		Hostname   string            `json:"name"`
		PublicKeys map[string]string `json:"public_keys"`
		LocalIPv4  string            `json:"local-ipv4"`
		PublicIPv4 string            `json:"public-ipv4"`
	}
	client := new(fakeCepgoClient)
	scs := NewServerContextService()
	scs.client = client
	client.raw = []byte(`{
		"context": true,
		"cpu": 4000,
		"cpu_model": null,
		"cpus_instead_of_cores": false,
		"enable_numa": false,
		"grantees": [],
		"hv_relaxed": false,
		"hv_tsc": false,
		"jobs": [],
		"mem": 4294967296,
		"meta": {
			"base64_fields": "cloudinit-user-data",
			"cloudinit-user-data": "I2Nsb3VkLWNvbmZpZwoKaG9zdG5hbWU6IGNvcmVvczE=",
			"ssh_public_key": "ssh-rsa AAAAB3NzaC1yc2E.../hQ5D5 john@doe"
		},
		"name": "coreos",
		"nics": [
			{
				"runtime": {
					"interface_type": "public",
					"ip_v4": {
						"uuid": "31.171.251.74"
					},
					"ip_v6": null
				},
				"vlan": null
			}
		],
		"smp": 2,
		"status": "running",
		"uuid": "20a0059b-041e-4d0c-bcc6-9b2852de48b3"
	}`)

	metadataBytes, err := scs.FetchMetadata()
	if err != nil {
		t.Error(err.Error())
	}

	if err := json.Unmarshal(metadataBytes, &metadata); err != nil {
		t.Error(err.Error())
	}

	if metadata.Hostname != "coreos" {
		t.Errorf("Hostname is not 'coreos' but %s instead", metadata.Hostname)
	}

	if metadata.PublicKeys["john@doe"] != "ssh-rsa AAAAB3NzaC1yc2E.../hQ5D5 john@doe" {
		t.Error("Public SSH Keys are not being read properly")
	}

	if metadata.LocalIPv4 != "" {
		t.Errorf("Local IP is not empty but %s instead", metadata.LocalIPv4)
	}

	if metadata.PublicIPv4 != "31.171.251.74" {
		t.Errorf("Local IP is not 31.171.251.74 but %s instead", metadata.PublicIPv4)
	}
}

func TestServerContextFetchUserdata(t *testing.T) {
	client := new(fakeCepgoClient)
	scs := NewServerContextService()
	scs.client = client
	userdataSets := []struct {
		in  map[string]string
		err bool
		out []byte
	}{
		{map[string]string{
			"base64_fields":       "cloudinit-user-data",
			"cloudinit-user-data": "aG9zdG5hbWU6IGNvcmVvc190ZXN0",
		}, false, []byte("hostname: coreos_test")},
		{map[string]string{
			"cloudinit-user-data": "#cloud-config\\nhostname: coreos1",
		}, false, []byte("#cloud-config\\nhostname: coreos1")},
		{map[string]string{}, false, []byte{}},
	}

	for i, set := range userdataSets {
		client.meta = set.in
		got, err := scs.FetchUserdata()
		if (err != nil) != set.err {
			t.Errorf("case %d: bad error state (got %t, want %t)", i, err != nil, set.err)
		}

		if !reflect.DeepEqual(got, set.out) {
			t.Errorf("case %d: got %s, want %s", i, got, set.out)
		}
	}
}

func TestServerContextDecodingBase64UserData(t *testing.T) {
	base64Sets := []struct {
		in  string
		out bool
	}{
		{"cloudinit-user-data,foo,bar", true},
		{"bar,cloudinit-user-data,foo,bar", true},
		{"cloudinit-user-data", true},
		{"", false},
		{"foo", false},
	}

	for _, set := range base64Sets {
		userdata := map[string]string{"base64_fields": set.in}
		if isBase64Encoded("cloudinit-user-data", userdata) != set.out {
			t.Errorf("isBase64Encoded(cloudinit-user-data, %s) should be %t", userdata, set.out)
		}
	}
}