package deploy

import (
	"testing"

	"github.com/docker/docker/api/types/mount"
	"github.com/psviderski/uncloud/pkg/api"
	"github.com/stretchr/testify/assert"
)

func TestEvalContainerSpecChange_ContainerCPU(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name    string
		current api.CPUResources
		new     api.CPUResources
		want    ContainerSpecStatus
	}{
		{
			name:    "set limit",
			current: api.CPUResources{},
			new: api.CPUResources{
				Limit: 1000000000,
			},
			want: ContainerNeedsUpdate,
		},
		{
			name: "change limit",
			current: api.CPUResources{
				Limit: 1000000000,
			},
			new: api.CPUResources{
				Limit: 2000000000,
			},
			want: ContainerNeedsUpdate,
		},
		{
			name: "unset limit",
			current: api.CPUResources{
				Limit: 1000000000,
			},
			new:  api.CPUResources{},
			want: ContainerNeedsUpdate,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			currentSpec := api.ServiceSpec{
				Container: api.ContainerSpec{
					Image: "nginx:latest",
					CPU:   tt.current,
				},
			}
			newSpec := api.ServiceSpec{
				Container: api.ContainerSpec{
					Image: "nginx:latest",
					CPU:   tt.new,
				},
			}

			result := EvalContainerSpecChange(currentSpec, newSpec)
			assert.Equal(t, tt.want, result)
		})
	}
}

func TestEvalContainerSpecChange_ContainerImage(t *testing.T) {
	t.Parallel()

	currentSpec := api.ServiceSpec{
		Container: api.ContainerSpec{
			Image: "nginx:latest",
		},
	}
	newSpec := api.ServiceSpec{
		Container: api.ContainerSpec{
			Image: "nginx:latest",
		},
	}
	assert.Equal(t, ContainerUpToDate, EvalContainerSpecChange(currentSpec, newSpec))

	newSpec.Container.Image = "nginx:1.19"
	assert.Equal(t, ContainerNeedsRecreate, EvalContainerSpecChange(currentSpec, newSpec))
}

func TestEvalContainerSpecChange_ContainerLogDriver(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name    string
		current *api.LogDriver
		new     *api.LogDriver
		want    ContainerSpecStatus
	}{
		{
			name:    "set driver",
			current: nil,
			new: &api.LogDriver{
				Name: "json-file",
			},
			want: ContainerNeedsRecreate,
		},
		{
			name: "change driver",
			current: &api.LogDriver{
				Name: "json-file",
			},
			new: &api.LogDriver{
				Name: "syslog",
			},
			want: ContainerNeedsRecreate,
		},
		{
			name: "set empty options",
			current: &api.LogDriver{
				Name: "json-file",
			},
			new: &api.LogDriver{
				Name:    "json-file",
				Options: map[string]string{},
			},
			want: ContainerUpToDate,
		},
		{
			name: "set options",
			current: &api.LogDriver{
				Name: "json-file",
			},
			new: &api.LogDriver{
				Name: "json-file",
				Options: map[string]string{
					"max-size": "10m",
				},
			},
			want: ContainerNeedsRecreate,
		},
		{
			name: "change options",
			current: &api.LogDriver{
				Name: "json-file",
				Options: map[string]string{
					"max-size": "10m",
				},
			},
			new: &api.LogDriver{
				Name: "json-file",
				Options: map[string]string{
					"max-size": "20m",
				},
			},
			want: ContainerNeedsRecreate,
		},
		{
			name: "unset options",
			current: &api.LogDriver{
				Name: "json-file",
				Options: map[string]string{
					"max-size": "10m",
				},
			},
			new: &api.LogDriver{
				Name: "json-file",
			},
			want: ContainerNeedsRecreate,
		},
		{
			name: "unset driver",
			current: &api.LogDriver{
				Name: "json-file",
				Options: map[string]string{
					"max-size": "10m",
				},
			},
			new:  nil,
			want: ContainerNeedsRecreate,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			currentSpec := api.ServiceSpec{
				Container: api.ContainerSpec{
					Image:     "nginx:latest",
					LogDriver: tt.current,
				},
			}
			newSpec := api.ServiceSpec{
				Container: api.ContainerSpec{
					Image:     "nginx:latest",
					LogDriver: tt.new,
				},
			}

			result := EvalContainerSpecChange(currentSpec, newSpec)
			assert.Equal(t, tt.want, result)
		})
	}
}

func TestEvalContainerSpecChange_ContainerMemory(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name    string
		current api.MemoryResources
		new     api.MemoryResources
		want    ContainerSpecStatus
	}{
		{
			name:    "empty",
			current: api.MemoryResources{},
			new:     api.MemoryResources{},
			want:    ContainerUpToDate,
		},
		{
			name:    "equal limit",
			current: api.MemoryResources{Limit: 100 * 1024 * 1024},
			new:     api.MemoryResources{Limit: 100 * 1024 * 1024},
			want:    ContainerUpToDate,
		},
		{
			name:    "equal reservation",
			current: api.MemoryResources{Reservation: 50 * 1024 * 1024},
			new:     api.MemoryResources{Reservation: 50 * 1024 * 1024},
			want:    ContainerUpToDate,
		},
		{
			name:    "equal limit and reservation",
			current: api.MemoryResources{Limit: 100 * 1024 * 1024, Reservation: 50 * 1024 * 1024},
			new:     api.MemoryResources{Limit: 100 * 1024 * 1024, Reservation: 50 * 1024 * 1024},
			want:    ContainerUpToDate,
		},
		{
			name:    "set limit",
			current: api.MemoryResources{},
			new:     api.MemoryResources{Limit: 100 * 1024 * 1024},
			want:    ContainerNeedsUpdate,
		},
		{
			name:    "set reservation",
			current: api.MemoryResources{},
			new:     api.MemoryResources{Reservation: 50 * 1024 * 1024},
			want:    ContainerNeedsUpdate,
		},
		{
			name:    "set limit and reservation",
			current: api.MemoryResources{},
			new:     api.MemoryResources{Limit: 100 * 1024 * 1024, Reservation: 50 * 1024 * 1024},
			want:    ContainerNeedsUpdate,
		},
		{
			name:    "change limit",
			current: api.MemoryResources{Limit: 100 * 1024 * 1024},
			new:     api.MemoryResources{Limit: 200 * 1024 * 1024},
			want:    ContainerNeedsUpdate,
		},
		{
			name:    "change reservation",
			current: api.MemoryResources{Reservation: 50 * 1024 * 1024},
			new:     api.MemoryResources{Reservation: 100 * 1024 * 1024},
			want:    ContainerNeedsUpdate,
		},
		{
			name:    "change limit and reservation",
			current: api.MemoryResources{Limit: 100 * 1024 * 1024, Reservation: 50 * 1024 * 1024},
			new:     api.MemoryResources{Limit: 200 * 1024 * 1024, Reservation: 100 * 1024 * 1024},
			want:    ContainerNeedsUpdate,
		},
		{
			name:    "unset limit",
			current: api.MemoryResources{Limit: 100 * 1024 * 1024, Reservation: 50 * 1024 * 1024},
			new:     api.MemoryResources{Reservation: 50 * 1024 * 1024},
			want:    ContainerNeedsUpdate,
		},
		{
			name:    "unset reservation",
			current: api.MemoryResources{Limit: 100 * 1024 * 1024, Reservation: 50 * 1024 * 1024},
			new:     api.MemoryResources{Limit: 100 * 1024 * 1024},
			want:    ContainerNeedsUpdate,
		},
		{
			name:    "unset limit and reservation",
			current: api.MemoryResources{Limit: 100 * 1024 * 1024, Reservation: 50 * 1024 * 1024},
			new:     api.MemoryResources{},
			want:    ContainerNeedsUpdate,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			currentSpec := api.ServiceSpec{
				Container: api.ContainerSpec{
					Image:  "nginx:latest",
					Memory: tt.current,
				},
			}
			newSpec := api.ServiceSpec{
				Container: api.ContainerSpec{
					Image:  "nginx:latest",
					Memory: tt.new,
				},
			}

			result := EvalContainerSpecChange(currentSpec, newSpec)
			assert.Equal(t, tt.want, result)
		})
	}
}

func TestEvalContainerSpecChange_ContainerPrivileged(t *testing.T) {
	t.Parallel()

	currentSpec := api.ServiceSpec{
		Container: api.ContainerSpec{
			Image: "nginx:latest",
		},
	}
	newSpec := api.ServiceSpec{
		Container: api.ContainerSpec{
			Image:      "nginx:latest",
			Privileged: true,
		},
	}

	assert.Equal(t, ContainerNeedsRecreate, EvalContainerSpecChange(currentSpec, newSpec))
	assert.Equal(t, ContainerNeedsRecreate, EvalContainerSpecChange(newSpec, currentSpec))
}

func TestEvalContainerSpecChange_ContainerUser(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name    string
		current string
		new     string
		want    ContainerSpecStatus
	}{
		{
			name:    "empty",
			current: "",
			new:     "",
			want:    ContainerUpToDate,
		},
		{
			name:    "equal user",
			current: "user",
			new:     "user",
			want:    ContainerUpToDate,
		},
		{
			name:    "equal UID",
			current: "1000",
			new:     "1000",
			want:    ContainerUpToDate,
		},
		{
			name:    "equal user group",
			current: "user:group",
			new:     "user:group",
			want:    ContainerUpToDate,
		},
		{
			name:    "equal UID GID",
			current: "1000:1000",
			new:     "1000:1000",
			want:    ContainerUpToDate,
		},
		{
			name:    "set user",
			current: "",
			new:     "user",
			want:    ContainerNeedsRecreate,
		},
		{
			name:    "set UID",
			current: "",
			new:     "1000",
			want:    ContainerNeedsRecreate,
		},
		{
			name:    "set user group",
			current: "",
			new:     "user:group",
			want:    ContainerNeedsRecreate,
		},
		{
			name:    "set UID GID",
			current: "",
			new:     "1000:1000",
			want:    ContainerNeedsRecreate,
		},
		{
			name:    "change user",
			current: "user",
			new:     "another_user",
			want:    ContainerNeedsRecreate,
		},
		{
			name:    "change group",
			current: "user:group",
			new:     "user:another_group",
			want:    ContainerNeedsRecreate,
		},
		{
			name:    "change user group",
			current: "user:group",
			new:     "another_user:another_group",
			want:    ContainerNeedsRecreate,
		},
		{
			name:    "unser user",
			current: "user",
			new:     "",
			want:    ContainerNeedsRecreate,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			currentSpec := api.ServiceSpec{
				Container: api.ContainerSpec{
					Image: "nginx:latest",
					User:  tt.current,
				},
			}
			newSpec := api.ServiceSpec{
				Container: api.ContainerSpec{
					Image: "nginx:latest",
					User:  tt.new,
				},
			}

			result := EvalContainerSpecChange(currentSpec, newSpec)
			assert.Equal(t, tt.want, result)
		})
	}
}

func TestEvalContainerSpecChange_Placement(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name    string
		current api.Placement
		new     api.Placement
		want    ContainerSpecStatus
	}{
		{
			name:    "empty",
			current: api.Placement{},
			new:     api.Placement{},
			want:    ContainerUpToDate,
		},
		{
			name:    "empty machines",
			current: api.Placement{Machines: nil},
			new:     api.Placement{Machines: []string{}},
			want:    ContainerUpToDate,
		},
		{
			name:    "set machines",
			current: api.Placement{},
			new:     api.Placement{Machines: []string{"machine1"}},
			want:    ContainerNeedsRecreate,
		},
		{
			name:    "unset",
			current: api.Placement{Machines: []string{"machine1"}},
			new:     api.Placement{},
			want:    ContainerNeedsRecreate,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			currentSpec := api.ServiceSpec{
				Container: api.ContainerSpec{
					Image: "nginx:latest",
				},
				Placement: tt.current,
			}
			newSpec := api.ServiceSpec{
				Container: api.ContainerSpec{
					Image: "nginx:latest",
				},
				Placement: tt.new,
			}

			result := EvalContainerSpecChange(currentSpec, newSpec)
			assert.Equal(t, tt.want, result)
		})
	}
}

func TestEvalContainerSpecChange_Volumes(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name    string
		current api.ServiceSpec
		new     api.ServiceSpec
		want    ContainerSpecStatus
	}{
		// TODO: should all volumes that are defined but not used (no corresponding mounts) be simply ignored?
		{
			name: "identical volumes",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
				},
			},
			want: ContainerUpToDate,
		},
		{
			name: "volumes in different order but identical",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data1",
						Type: api.VolumeTypeVolume,
					},
					{
						Name: "data2",
						Type: api.VolumeTypeVolume,
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data2",
						Type: api.VolumeTypeVolume,
					},
					{
						Name: "data1",
						Type: api.VolumeTypeVolume,
					},
				},
			},
			want: ContainerUpToDate,
		},
		{
			name: "different number of volumes",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
					{
						Name: "config",
						Type: api.VolumeTypeVolume,
					},
				},
			},
			want: ContainerNeedsRecreate,
		},
		{
			name: "no volumes to one volume",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
				},
			},
			want: ContainerNeedsRecreate,
		},
		{
			name: "one volume to no volumes",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{},
			},
			want: ContainerNeedsRecreate,
		},
		{
			name: "change volume type",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeBind,
						BindOptions: &api.BindOptions{
							HostPath: "/host/path",
						},
					},
				},
			},
			want: ContainerNeedsRecreate,
		},
		{
			name: "change volume options",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
						VolumeOptions: &api.VolumeOptions{
							NoCopy: false,
						},
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
						VolumeOptions: &api.VolumeOptions{
							NoCopy: true,
						},
					},
				},
			},
			want: ContainerNeedsRecreate,
		},
		{
			name: "change volume options to defaults",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
						VolumeOptions: &api.VolumeOptions{
							Name: "data",
						},
					},
				},
			},
			want: ContainerUpToDate,
		},
		{
			name: "change volume driver to local",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
						VolumeOptions: &api.VolumeOptions{
							Name: "data",
							Driver: &mount.Driver{
								Name: api.VolumeDriverLocal,
							},
						},
					},
				},
			},
			// TODO: this doesn't really require a recreate, only a spec update would be sufficient.
			want: ContainerNeedsRecreate,
		},
		{
			name: "change volume driver to custom",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
						VolumeOptions: &api.VolumeOptions{
							Name: "data",
							Driver: &mount.Driver{
								Name: "custom",
							},
						},
					},
				},
			},
			// TODO: this doesn't really require a recreate, only a spec update would be sufficient.
			want: ContainerNeedsRecreate,
		},
		{
			name: "change bind option CreateHostPath",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "config",
						Type: api.VolumeTypeBind,
						BindOptions: &api.BindOptions{
							HostPath: "/host/path",
						},
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "config",
						Type: api.VolumeTypeBind,
						BindOptions: &api.BindOptions{
							HostPath:       "/host/path",
							CreateHostPath: true,
						},
					},
				},
			},
			// TODO: this doesn't really require a recreate, only a spec update would be sufficient.
			want: ContainerNeedsRecreate,
		},
		{
			name: "change bind option propagation",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "config",
						Type: api.VolumeTypeBind,
						BindOptions: &api.BindOptions{
							HostPath: "/host/path",
						},
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "config",
						Type: api.VolumeTypeBind,
						BindOptions: &api.BindOptions{
							HostPath:    "/host/path",
							Propagation: mount.PropagationRPrivate,
						},
					},
				},
			},
			// TODO: should we handle rprivate the same as empty propagation, hence up-to-date?
			want: ContainerNeedsRecreate,
		},
		{
			name: "change tmpfs options",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "temp",
						Type: api.VolumeTypeTmpfs,
						TmpfsOptions: &mount.TmpfsOptions{
							SizeBytes: 1024 * 1024,
						},
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "temp",
						Type: api.VolumeTypeTmpfs,
						TmpfsOptions: &mount.TmpfsOptions{
							SizeBytes: 2 * 1024 * 1024,
						},
					},
				},
			},
			want: ContainerNeedsRecreate,
		},
		{
			name: "changing volume name",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data-new",
						Type: api.VolumeTypeVolume,
					},
				},
			},
			want: ContainerNeedsRecreate,
		},
		// Tests for volume mounts
		{
			name: "identical volume mounts",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data",
							ContainerPath: "/data",
						},
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data",
							ContainerPath: "/data",
						},
					},
				},
			},
			want: ContainerUpToDate,
		},
		{
			name: "volume mounts in different order but identical",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data1",
						Type: api.VolumeTypeVolume,
					},
					{
						Name: "data2",
						Type: api.VolumeTypeVolume,
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data1",
							ContainerPath: "/data1",
						},
						{
							VolumeName:    "data2",
							ContainerPath: "/data2",
						},
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data1",
						Type: api.VolumeTypeVolume,
					},
					{
						Name: "data2",
						Type: api.VolumeTypeVolume,
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data2",
							ContainerPath: "/data2",
						},
						{
							VolumeName:    "data1",
							ContainerPath: "/data1",
						},
					},
				},
			},
			want: ContainerUpToDate,
		},
		{
			name: "volumes and volume mounts in different order but identical",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data1",
						Type: api.VolumeTypeVolume,
					},
					{
						Name: "data2",
						Type: api.VolumeTypeVolume,
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data1",
							ContainerPath: "/data1",
						},
						{
							VolumeName:    "data2",
							ContainerPath: "/data2",
						},
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data2",
						Type: api.VolumeTypeVolume,
					},
					{
						Name: "data1",
						Type: api.VolumeTypeVolume,
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data2",
							ContainerPath: "/data2",
						},
						{
							VolumeName:    "data1",
							ContainerPath: "/data1",
						},
					},
				},
			},
			want: ContainerUpToDate,
		},
		{
			name: "added volume mount",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
					{
						Name: "config",
						Type: api.VolumeTypeVolume,
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data",
							ContainerPath: "/data",
						},
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
					{
						Name: "config",
						Type: api.VolumeTypeVolume,
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data",
							ContainerPath: "/data",
						},
						{
							VolumeName:    "config",
							ContainerPath: "/config",
						},
					},
				},
			},
			want: ContainerNeedsRecreate,
		},
		{
			name: "removed volume mount",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
					{
						Name: "config",
						Type: api.VolumeTypeVolume,
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data",
							ContainerPath: "/data",
						},
						{
							VolumeName:    "config",
							ContainerPath: "/config",
						},
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
					{
						Name: "config",
						Type: api.VolumeTypeVolume,
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data",
							ContainerPath: "/data",
						},
					},
				},
			},
			want: ContainerNeedsRecreate,
		},
		{
			name: "changed volume mount container path",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data",
							ContainerPath: "/data",
						},
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data",
							ContainerPath: "/new/data/path",
						},
					},
				},
			},
			want: ContainerNeedsRecreate,
		},
		{
			name: "changed volume mount read-only flag",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data",
							ContainerPath: "/data",
							ReadOnly:      false,
						},
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data",
							ContainerPath: "/data",
							ReadOnly:      true,
						},
					},
				},
			},
			want: ContainerNeedsRecreate,
		},
		{
			name: "changed mounted volume type",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data",
							ContainerPath: "/data",
						},
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeBind,
						BindOptions: &api.BindOptions{
							HostPath: "/host/path",
						},
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data",
							ContainerPath: "/data",
						},
					},
				},
			},
			want: ContainerNeedsRecreate,
		},
		{
			name: "changed reference name in spec but preserved original volume name",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data",
							ContainerPath: "/data",
						},
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "new_name",
						Type: api.VolumeTypeVolume,
						VolumeOptions: &api.VolumeOptions{
							Name: "data",
						},
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "new_name",
							ContainerPath: "/data",
						},
					},
				},
			},
			// TODO: this doesn't really require a recreate, only a spec update would be sufficient.
			want: ContainerNeedsRecreate,
		},
		{
			name: "changed volumes, mounts and paths",
			current: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
					},
					{
						Name: "config",
						Type: api.VolumeTypeBind,
						BindOptions: &api.BindOptions{
							HostPath: "/etc/app/config",
						},
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data",
							ContainerPath: "/data",
						},
						{
							VolumeName:    "config",
							ContainerPath: "/app/config",
							ReadOnly:      true,
						},
					},
				},
			},
			new: api.ServiceSpec{
				Volumes: []api.VolumeSpec{
					{
						Name: "data",
						Type: api.VolumeTypeVolume,
						VolumeOptions: &api.VolumeOptions{
							NoCopy: true,
						},
					},
					{
						Name: "config",
						Type: api.VolumeTypeBind,
						BindOptions: &api.BindOptions{
							HostPath:       "/etc/app/new-config",
							CreateHostPath: true,
						},
					},
					{
						Name: "logs",
						Type: api.VolumeTypeVolume,
					},
				},
				Container: api.ContainerSpec{
					VolumeMounts: []api.VolumeMount{
						{
							VolumeName:    "data",
							ContainerPath: "/var/lib/app/data",
						},
						{
							VolumeName:    "config",
							ContainerPath: "/app/config",
							ReadOnly:      true,
						},
						{
							VolumeName:    "logs",
							ContainerPath: "/var/log/app",
						},
					},
				},
			},
			want: ContainerNeedsRecreate,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			result := EvalContainerSpecChange(tt.current, tt.new)
			assert.Equal(t, tt.want, result)
		})
	}
}

func TestEvalContainerSpecChange_Mixed(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name    string
		current api.ServiceSpec
		new     api.ServiceSpec
		want    ContainerSpecStatus
	}{

		{
			name: "mutable changes",
			current: api.ServiceSpec{
				Container: api.ContainerSpec{
					Image: "nginx:latest",
					Memory: api.MemoryResources{
						Limit: 100 * 1024 * 1024,
					},
				},
			},
			new: api.ServiceSpec{
				Container: api.ContainerSpec{
					Image: "nginx:latest",
					CPU: api.CPUResources{
						Limit: 1000000000,
					},
					Memory: api.MemoryResources{
						Limit:       200 * 1024 * 1024,
						Reservation: 100 * 1024 * 1024,
					},
				},
			},
			want: ContainerNeedsUpdate,
		},
		{
			name: "mutable and immutable changes",
			current: api.ServiceSpec{
				Container: api.ContainerSpec{
					Image: "nginx:latest",
				},
			},
			new: api.ServiceSpec{
				Container: api.ContainerSpec{
					Image: "nginx:latest",
					CPU: api.CPUResources{
						Limit: 1000000000,
					},
					User: "root",
				},
			},
			want: ContainerNeedsRecreate,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			result := EvalContainerSpecChange(tt.current, tt.new)
			assert.Equal(t, tt.want, result)
		})
	}
}