package container

import (
	"context"
	"fmt"
	"testing"
	"time"

	"github.com/docker/docker/api/types"
	"github.com/docker/docker/api/types/container"
	"github.com/docker/docker/integration-cli/daemon"
)

func TestDaemonRestartKillContainers(t *testing.T) {
	type testCase struct {
		desc       string
		config     *container.Config
		hostConfig *container.HostConfig

		xRunning            bool
		xRunningLiveRestore bool
	}

	for _, c := range []testCase{
		{
			desc:                "container without restart policy",
			config:              &container.Config{Image: "busybox", Cmd: []string{"top"}},
			xRunningLiveRestore: true,
		},
		{
			desc:                "container with restart=always",
			config:              &container.Config{Image: "busybox", Cmd: []string{"top"}},
			hostConfig:          &container.HostConfig{RestartPolicy: container.RestartPolicy{Name: "always"}},
			xRunning:            true,
			xRunningLiveRestore: true,
		},
	} {
		for _, liveRestoreEnabled := range []bool{false, true} {
			for fnName, stopDaemon := range map[string]func(*testing.T, *daemon.Daemon){
				"kill-daemon": func(t *testing.T, d *daemon.Daemon) {
					if err := d.Kill(); err != nil {
						t.Fatal(err)
					}
				},
				"stop-daemon": func(t *testing.T, d *daemon.Daemon) {
					d.Stop(t)
				},
			} {
				t.Run(fmt.Sprintf("live-restore=%v/%s/%s", liveRestoreEnabled, c.desc, fnName), func(t *testing.T) {
					c := c
					liveRestoreEnabled := liveRestoreEnabled
					stopDaemon := stopDaemon

					t.Parallel()

					d := daemon.New(t, "", "dockerd", daemon.Config{})
					client, err := d.NewClient()
					if err != nil {
						t.Fatal(err)
					}

					var args []string
					if liveRestoreEnabled {
						args = []string{"--live-restore"}
					}

					d.StartWithBusybox(t, args...)
					defer d.Stop(t)
					ctx := context.Background()

					resp, err := client.ContainerCreate(ctx, c.config, c.hostConfig, nil, "")
					if err != nil {
						t.Fatal(err)
					}
					defer client.ContainerRemove(ctx, resp.ID, types.ContainerRemoveOptions{Force: true})

					if err := client.ContainerStart(ctx, resp.ID, types.ContainerStartOptions{}); err != nil {
						t.Fatal(err)
					}

					stopDaemon(t, d)
					d.Start(t, args...)

					expected := c.xRunning
					if liveRestoreEnabled {
						expected = c.xRunningLiveRestore
					}

					var running bool
					for i := 0; i < 30; i++ {
						inspect, err := client.ContainerInspect(ctx, resp.ID)
						if err != nil {
							t.Fatal(err)
						}

						running = inspect.State.Running
						if running == expected {
							break
						}
						time.Sleep(2 * time.Second)

					}

					if running != expected {
						t.Fatalf("got unexpected running state, expected %v, got: %v", expected, running)
					}
					// TODO(cpuguy83): test pause states... this seems to be rather undefined currently
				})
			}
		}
	}
}