/*
   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 initialize

import (
	"reflect"
	"testing"

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

type TestUnitManager struct {
	placed   []string
	enabled  []string
	masked   []string
	unmasked []string
	commands []UnitAction
	reload   bool
}

type UnitAction struct {
	unit    string
	command string
}

func (tum *TestUnitManager) PlaceUnit(u system.Unit) error {
	tum.placed = append(tum.placed, u.Name)
	return nil
}
func (tum *TestUnitManager) PlaceUnitDropIn(u system.Unit, d config.UnitDropIn) error {
	tum.placed = append(tum.placed, u.Name+".d/"+d.Name)
	return nil
}
func (tum *TestUnitManager) EnableUnitFile(u system.Unit) error {
	tum.enabled = append(tum.enabled, u.Name)
	return nil
}
func (tum *TestUnitManager) RunUnitCommand(u system.Unit, c string) (string, error) {
	tum.commands = append(tum.commands, UnitAction{u.Name, c})
	return "", nil
}
func (tum *TestUnitManager) DaemonReload() error {
	tum.reload = true
	return nil
}
func (tum *TestUnitManager) MaskUnit(u system.Unit) error {
	tum.masked = append(tum.masked, u.Name)
	return nil
}
func (tum *TestUnitManager) UnmaskUnit(u system.Unit) error {
	tum.unmasked = append(tum.unmasked, u.Name)
	return nil
}

type mockInterface struct {
	name           string
	filename       string
	netdev         string
	link           string
	network        string
	kind           string
	modprobeParams string
}

func (i mockInterface) Name() string {
	return i.name
}

func (i mockInterface) Filename() string {
	return i.filename
}

func (i mockInterface) Netdev() string {
	return i.netdev
}

func (i mockInterface) Link() string {
	return i.link
}

func (i mockInterface) Network() string {
	return i.network
}

func (i mockInterface) Type() string {
	return i.kind
}

func (i mockInterface) ModprobeParams() string {
	return i.modprobeParams
}

func TestCreateNetworkingUnits(t *testing.T) {
	for _, tt := range []struct {
		interfaces []network.InterfaceGenerator
		expect     []system.Unit
	}{
		{nil, nil},
		{
			[]network.InterfaceGenerator{
				network.InterfaceGenerator(mockInterface{filename: "test"}),
			},
			nil,
		},
		{
			[]network.InterfaceGenerator{
				network.InterfaceGenerator(mockInterface{filename: "test1", netdev: "test netdev"}),
				network.InterfaceGenerator(mockInterface{filename: "test2", link: "test link"}),
				network.InterfaceGenerator(mockInterface{filename: "test3", network: "test network"}),
			},
			[]system.Unit{
				system.Unit{Unit: config.Unit{Name: "test1.netdev", Runtime: true, Content: "test netdev"}},
				system.Unit{Unit: config.Unit{Name: "test2.link", Runtime: true, Content: "test link"}},
				system.Unit{Unit: config.Unit{Name: "test3.network", Runtime: true, Content: "test network"}},
			},
		},
		{
			[]network.InterfaceGenerator{
				network.InterfaceGenerator(mockInterface{filename: "test", netdev: "test netdev", link: "test link", network: "test network"}),
			},
			[]system.Unit{
				system.Unit{Unit: config.Unit{Name: "test.netdev", Runtime: true, Content: "test netdev"}},
				system.Unit{Unit: config.Unit{Name: "test.link", Runtime: true, Content: "test link"}},
				system.Unit{Unit: config.Unit{Name: "test.network", Runtime: true, Content: "test network"}},
			},
		},
	} {
		units := createNetworkingUnits(tt.interfaces)
		if !reflect.DeepEqual(tt.expect, units) {
			t.Errorf("bad units (%+v): want %#v, got %#v", tt.interfaces, tt.expect, units)
		}
	}
}

func TestProcessUnits(t *testing.T) {
	tests := []struct {
		units []system.Unit

		result TestUnitManager
	}{
		{
			units: []system.Unit{
				system.Unit{Unit: config.Unit{
					Name: "foo",
					Mask: true,
				}},
			},
			result: TestUnitManager{
				masked: []string{"foo"},
			},
		},
		{
			units: []system.Unit{
				system.Unit{Unit: config.Unit{
					Name:    "baz.service",
					Content: "[Service]\nExecStart=/bin/baz",
					Command: "start",
				}},
				system.Unit{Unit: config.Unit{
					Name:    "foo.network",
					Content: "[Network]\nFoo=true",
				}},
				system.Unit{Unit: config.Unit{
					Name:    "bar.network",
					Content: "[Network]\nBar=true",
				}},
			},
			result: TestUnitManager{
				placed: []string{"baz.service", "foo.network", "bar.network"},
				commands: []UnitAction{
					UnitAction{"systemd-networkd.service", "restart"},
					UnitAction{"baz.service", "start"},
				},
				reload: true,
			},
		},
		{
			units: []system.Unit{
				system.Unit{Unit: config.Unit{
					Name:    "baz.service",
					Content: "[Service]\nExecStart=/bin/true",
				}},
			},
			result: TestUnitManager{
				placed: []string{"baz.service"},
				reload: true,
			},
		},
		{
			units: []system.Unit{
				system.Unit{Unit: config.Unit{
					Name:    "locksmithd.service",
					Runtime: true,
				}},
			},
			result: TestUnitManager{
				unmasked: []string{"locksmithd.service"},
			},
		},
		{
			units: []system.Unit{
				system.Unit{Unit: config.Unit{
					Name:   "woof",
					Enable: true,
				}},
			},
			result: TestUnitManager{
				enabled: []string{"woof"},
			},
		},
		{
			units: []system.Unit{
				system.Unit{Unit: config.Unit{
					Name:    "hi.service",
					Runtime: true,
					Content: "[Service]\nExecStart=/bin/echo hi",
					DropIns: []config.UnitDropIn{
						{
							Name:    "lo.conf",
							Content: "[Service]\nExecStart=/bin/echo lo",
						},
						{
							Name:    "bye.conf",
							Content: "[Service]\nExecStart=/bin/echo bye",
						},
					},
				}},
			},
			result: TestUnitManager{
				placed:   []string{"hi.service", "hi.service.d/lo.conf", "hi.service.d/bye.conf"},
				unmasked: []string{"hi.service"},
				reload:   true,
			},
		},
		{
			units: []system.Unit{
				system.Unit{Unit: config.Unit{
					DropIns: []config.UnitDropIn{
						{
							Name:    "lo.conf",
							Content: "[Service]\nExecStart=/bin/echo lo",
						},
					},
				}},
			},
			result: TestUnitManager{},
		},
		{
			units: []system.Unit{
				system.Unit{Unit: config.Unit{
					Name: "hi.service",
					DropIns: []config.UnitDropIn{
						{
							Content: "[Service]\nExecStart=/bin/echo lo",
						},
					},
				}},
			},
			result: TestUnitManager{},
		},
		{
			units: []system.Unit{
				system.Unit{Unit: config.Unit{
					Name: "hi.service",
					DropIns: []config.UnitDropIn{
						{
							Name: "lo.conf",
						},
					},
				}},
			},
			result: TestUnitManager{},
		},
	}

	for _, tt := range tests {
		tum := &TestUnitManager{}
		if err := processUnits(tt.units, "", tum); err != nil {
			t.Errorf("bad error (%+v): want nil, got %s", tt.units, err)
		}
		if !reflect.DeepEqual(tt.result, *tum) {
			t.Errorf("bad result (%+v): want %+v, got %+v", tt.units, tt.result, tum)
		}
	}
}