/*
   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 system

import (
	"errors"
	"io"
	"reflect"
	"strings"
	"testing"

	"github.com/coreos/coreos-cloudinit/config"
)

func testReadConfig(config string) func() (io.Reader, error) {
	return func() (io.Reader, error) {
		return strings.NewReader(config), nil
	}
}

func TestUpdateUnits(t *testing.T) {
	for _, tt := range []struct {
		config config.Update
		units  []Unit
		err    error
	}{
		{
			config: config.Update{},
		},
		{
			config: config.Update{Group: "master", Server: "http://foo.com"},
			units: []Unit{{config.Unit{
				Name:    "update-engine.service",
				Command: "restart",
			}}},
		},
		{
			config: config.Update{RebootStrategy: "best-effort"},
			units: []Unit{{config.Unit{
				Name:    "locksmithd.service",
				Command: "restart",
				Runtime: true,
			}}},
		},
		{
			config: config.Update{RebootStrategy: "etcd-lock"},
			units: []Unit{{config.Unit{
				Name:    "locksmithd.service",
				Command: "restart",
				Runtime: true,
			}}},
		},
		{
			config: config.Update{RebootStrategy: "reboot"},
			units: []Unit{{config.Unit{
				Name:    "locksmithd.service",
				Command: "restart",
				Runtime: true,
			}}},
		},
		{
			config: config.Update{RebootStrategy: "off"},
			units: []Unit{{config.Unit{
				Name:    "locksmithd.service",
				Command: "stop",
				Runtime: true,
				Mask:    true,
			}}},
		},
	} {
		units := Update{tt.config, testReadConfig("")}.Units()
		if !reflect.DeepEqual(tt.units, units) {
			t.Errorf("bad units (%q): want %#v, got %#v", tt.config, tt.units, units)
		}
	}
}

func TestUpdateFile(t *testing.T) {
	for _, tt := range []struct {
		config config.Update
		orig   string
		file   *File
		err    error
	}{
		{
			config: config.Update{},
		},
		{
			config: config.Update{RebootStrategy: "wizzlewazzle"},
			err:    errors.New("invalid value \"wizzlewazzle\" for option \"RebootStrategy\" (valid options: \"best-effort,etcd-lock,reboot,off\")"),
		},
		{
			config: config.Update{Group: "master", Server: "http://foo.com"},
			file: &File{config.File{
				Content:            "GROUP=master\nSERVER=http://foo.com\n",
				Path:               "etc/coreos/update.conf",
				RawFilePermissions: "0644",
			}},
		},
		{
			config: config.Update{RebootStrategy: "best-effort"},
			file: &File{config.File{
				Content:            "REBOOT_STRATEGY=best-effort\n",
				Path:               "etc/coreos/update.conf",
				RawFilePermissions: "0644",
			}},
		},
		{
			config: config.Update{RebootStrategy: "etcd-lock"},
			file: &File{config.File{
				Content:            "REBOOT_STRATEGY=etcd-lock\n",
				Path:               "etc/coreos/update.conf",
				RawFilePermissions: "0644",
			}},
		},
		{
			config: config.Update{RebootStrategy: "reboot"},
			file: &File{config.File{
				Content:            "REBOOT_STRATEGY=reboot\n",
				Path:               "etc/coreos/update.conf",
				RawFilePermissions: "0644",
			}},
		},
		{
			config: config.Update{RebootStrategy: "off"},
			file: &File{config.File{
				Content:            "REBOOT_STRATEGY=off\n",
				Path:               "etc/coreos/update.conf",
				RawFilePermissions: "0644",
			}},
		},
		{
			config: config.Update{RebootStrategy: "etcd-lock"},
			orig:   "SERVER=https://example.com\nGROUP=thegroupc\nREBOOT_STRATEGY=awesome",
			file: &File{config.File{
				Content:            "SERVER=https://example.com\nGROUP=thegroupc\nREBOOT_STRATEGY=etcd-lock\n",
				Path:               "etc/coreos/update.conf",
				RawFilePermissions: "0644",
			}},
		},
	} {
		file, err := Update{tt.config, testReadConfig(tt.orig)}.File()
		if !reflect.DeepEqual(tt.err, err) {
			t.Errorf("bad error (%q): want %q, got %q", tt.config, tt.err, err)
		}
		if !reflect.DeepEqual(tt.file, file) {
			t.Errorf("bad units (%q): want %#v, got %#v", tt.config, tt.file, file)
		}
	}
}