package container

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io/ioutil"
	"path"
	"reflect"
	"regexp"
	"strconv"
	"strings"
	"time"

	"github.com/docker/cli/cli/compose/loader"
	"github.com/docker/cli/opts"
	"github.com/docker/docker/api/types/container"
	networktypes "github.com/docker/docker/api/types/network"
	"github.com/docker/docker/api/types/strslice"
	"github.com/docker/docker/api/types/versions"
	"github.com/docker/docker/errdefs"
	"github.com/docker/docker/pkg/signal"
	"github.com/docker/go-connections/nat"
	"github.com/pkg/errors"
	"github.com/sirupsen/logrus"
	"github.com/spf13/pflag"
)

var (
	deviceCgroupRuleRegexp = regexp.MustCompile(`^[acb] ([0-9]+|\*):([0-9]+|\*) [rwm]{1,3}$`)
)

// containerOptions is a data object with all the options for creating a container
type containerOptions struct {
	attach             opts.ListOpts
	volumes            opts.ListOpts
	tmpfs              opts.ListOpts
	mounts             opts.MountOpt
	blkioWeightDevice  opts.WeightdeviceOpt
	deviceReadBps      opts.ThrottledeviceOpt
	deviceWriteBps     opts.ThrottledeviceOpt
	links              opts.ListOpts
	aliases            opts.ListOpts
	linkLocalIPs       opts.ListOpts
	deviceReadIOps     opts.ThrottledeviceOpt
	deviceWriteIOps    opts.ThrottledeviceOpt
	env                opts.ListOpts
	labels             opts.ListOpts
	deviceCgroupRules  opts.ListOpts
	devices            opts.ListOpts
	gpus               opts.GpuOpts
	ulimits            *opts.UlimitOpt
	sysctls            *opts.MapOpts
	publish            opts.ListOpts
	expose             opts.ListOpts
	dns                opts.ListOpts
	dnsSearch          opts.ListOpts
	dnsOptions         opts.ListOpts
	extraHosts         opts.ListOpts
	volumesFrom        opts.ListOpts
	envFile            opts.ListOpts
	capAdd             opts.ListOpts
	capDrop            opts.ListOpts
	groupAdd           opts.ListOpts
	securityOpt        opts.ListOpts
	storageOpt         opts.ListOpts
	labelsFile         opts.ListOpts
	loggingOpts        opts.ListOpts
	privileged         bool
	pidMode            string
	utsMode            string
	usernsMode         string
	publishAll         bool
	stdin              bool
	tty                bool
	oomKillDisable     bool
	oomScoreAdj        int
	containerIDFile    string
	entrypoint         string
	hostname           string
	domainname         string
	memory             opts.MemBytes
	memoryReservation  opts.MemBytes
	memorySwap         opts.MemSwapBytes
	kernelMemory       opts.MemBytes
	user               string
	workingDir         string
	cpuCount           int64
	cpuShares          int64
	cpuPercent         int64
	cpuPeriod          int64
	cpuRealtimePeriod  int64
	cpuRealtimeRuntime int64
	cpuQuota           int64
	cpus               opts.NanoCPUs
	cpusetCpus         string
	cpusetMems         string
	blkioWeight        uint16
	ioMaxBandwidth     opts.MemBytes
	ioMaxIOps          uint64
	swappiness         int64
	netMode            opts.NetworkOpt
	macAddress         string
	ipv4Address        string
	ipv6Address        string
	ipcMode            string
	pidsLimit          int64
	restartPolicy      string
	readonlyRootfs     bool
	loggingDriver      string
	cgroupParent       string
	volumeDriver       string
	stopSignal         string
	stopTimeout        int
	isolation          string
	shmSize            opts.MemBytes
	noHealthcheck      bool
	healthCmd          string
	healthInterval     time.Duration
	healthTimeout      time.Duration
	healthStartPeriod  time.Duration
	healthRetries      int
	runtime            string
	autoRemove         bool
	init               bool

	Image string
	Args  []string
}

// addFlags adds all command line flags that will be used by parse to the FlagSet
func addFlags(flags *pflag.FlagSet) *containerOptions {
	copts := &containerOptions{
		aliases:           opts.NewListOpts(nil),
		attach:            opts.NewListOpts(validateAttach),
		blkioWeightDevice: opts.NewWeightdeviceOpt(opts.ValidateWeightDevice),
		capAdd:            opts.NewListOpts(nil),
		capDrop:           opts.NewListOpts(nil),
		dns:               opts.NewListOpts(opts.ValidateIPAddress),
		dnsOptions:        opts.NewListOpts(nil),
		dnsSearch:         opts.NewListOpts(opts.ValidateDNSSearch),
		deviceCgroupRules: opts.NewListOpts(validateDeviceCgroupRule),
		deviceReadBps:     opts.NewThrottledeviceOpt(opts.ValidateThrottleBpsDevice),
		deviceReadIOps:    opts.NewThrottledeviceOpt(opts.ValidateThrottleIOpsDevice),
		deviceWriteBps:    opts.NewThrottledeviceOpt(opts.ValidateThrottleBpsDevice),
		deviceWriteIOps:   opts.NewThrottledeviceOpt(opts.ValidateThrottleIOpsDevice),
		devices:           opts.NewListOpts(nil), // devices can only be validated after we know the server OS
		env:               opts.NewListOpts(opts.ValidateEnv),
		envFile:           opts.NewListOpts(nil),
		expose:            opts.NewListOpts(nil),
		extraHosts:        opts.NewListOpts(opts.ValidateExtraHost),
		groupAdd:          opts.NewListOpts(nil),
		labels:            opts.NewListOpts(opts.ValidateLabel),
		labelsFile:        opts.NewListOpts(nil),
		linkLocalIPs:      opts.NewListOpts(nil),
		links:             opts.NewListOpts(opts.ValidateLink),
		loggingOpts:       opts.NewListOpts(nil),
		publish:           opts.NewListOpts(nil),
		securityOpt:       opts.NewListOpts(nil),
		storageOpt:        opts.NewListOpts(nil),
		sysctls:           opts.NewMapOpts(nil, opts.ValidateSysctl),
		tmpfs:             opts.NewListOpts(nil),
		ulimits:           opts.NewUlimitOpt(nil),
		volumes:           opts.NewListOpts(nil),
		volumesFrom:       opts.NewListOpts(nil),
	}

	// General purpose flags
	flags.VarP(&copts.attach, "attach", "a", "Attach to STDIN, STDOUT or STDERR")
	flags.Var(&copts.deviceCgroupRules, "device-cgroup-rule", "Add a rule to the cgroup allowed devices list")
	flags.Var(&copts.devices, "device", "Add a host device to the container")
	flags.Var(&copts.gpus, "gpus", "GPU devices to add to the container ('all' to pass all GPUs)")
	flags.SetAnnotation("gpus", "version", []string{"1.40"})
	flags.VarP(&copts.env, "env", "e", "Set environment variables")
	flags.Var(&copts.envFile, "env-file", "Read in a file of environment variables")
	flags.StringVar(&copts.entrypoint, "entrypoint", "", "Overwrite the default ENTRYPOINT of the image")
	flags.Var(&copts.groupAdd, "group-add", "Add additional groups to join")
	flags.StringVarP(&copts.hostname, "hostname", "h", "", "Container host name")
	flags.StringVar(&copts.domainname, "domainname", "", "Container NIS domain name")
	flags.BoolVarP(&copts.stdin, "interactive", "i", false, "Keep STDIN open even if not attached")
	flags.VarP(&copts.labels, "label", "l", "Set meta data on a container")
	flags.Var(&copts.labelsFile, "label-file", "Read in a line delimited file of labels")
	flags.BoolVar(&copts.readonlyRootfs, "read-only", false, "Mount the container's root filesystem as read only")
	flags.StringVar(&copts.restartPolicy, "restart", "no", "Restart policy to apply when a container exits")
	flags.StringVar(&copts.stopSignal, "stop-signal", signal.DefaultStopSignal, "Signal to stop a container")
	flags.IntVar(&copts.stopTimeout, "stop-timeout", 0, "Timeout (in seconds) to stop a container")
	flags.SetAnnotation("stop-timeout", "version", []string{"1.25"})
	flags.Var(copts.sysctls, "sysctl", "Sysctl options")
	flags.BoolVarP(&copts.tty, "tty", "t", false, "Allocate a pseudo-TTY")
	flags.Var(copts.ulimits, "ulimit", "Ulimit options")
	flags.StringVarP(&copts.user, "user", "u", "", "Username or UID (format: <name|uid>[:<group|gid>])")
	flags.StringVarP(&copts.workingDir, "workdir", "w", "", "Working directory inside the container")
	flags.BoolVar(&copts.autoRemove, "rm", false, "Automatically remove the container when it exits")

	// Security
	flags.Var(&copts.capAdd, "cap-add", "Add Linux capabilities")
	flags.Var(&copts.capDrop, "cap-drop", "Drop Linux capabilities")
	flags.BoolVar(&copts.privileged, "privileged", false, "Give extended privileges to this container")
	flags.Var(&copts.securityOpt, "security-opt", "Security Options")
	flags.StringVar(&copts.usernsMode, "userns", "", "User namespace to use")

	// Network and port publishing flag
	flags.Var(&copts.extraHosts, "add-host", "Add a custom host-to-IP mapping (host:ip)")
	flags.Var(&copts.dns, "dns", "Set custom DNS servers")
	// We allow for both "--dns-opt" and "--dns-option", although the latter is the recommended way.
	// This is to be consistent with service create/update
	flags.Var(&copts.dnsOptions, "dns-opt", "Set DNS options")
	flags.Var(&copts.dnsOptions, "dns-option", "Set DNS options")
	flags.MarkHidden("dns-opt")
	flags.Var(&copts.dnsSearch, "dns-search", "Set custom DNS search domains")
	flags.Var(&copts.expose, "expose", "Expose a port or a range of ports")
	flags.StringVar(&copts.ipv4Address, "ip", "", "IPv4 address (e.g., 172.30.100.104)")
	flags.StringVar(&copts.ipv6Address, "ip6", "", "IPv6 address (e.g., 2001:db8::33)")
	flags.Var(&copts.links, "link", "Add link to another container")
	flags.Var(&copts.linkLocalIPs, "link-local-ip", "Container IPv4/IPv6 link-local addresses")
	flags.StringVar(&copts.macAddress, "mac-address", "", "Container MAC address (e.g., 92:d0:c6:0a:29:33)")
	flags.VarP(&copts.publish, "publish", "p", "Publish a container's port(s) to the host")
	flags.BoolVarP(&copts.publishAll, "publish-all", "P", false, "Publish all exposed ports to random ports")
	// We allow for both "--net" and "--network", although the latter is the recommended way.
	flags.Var(&copts.netMode, "net", "Connect a container to a network")
	flags.Var(&copts.netMode, "network", "Connect a container to a network")
	flags.MarkHidden("net")
	// We allow for both "--net-alias" and "--network-alias", although the latter is the recommended way.
	flags.Var(&copts.aliases, "net-alias", "Add network-scoped alias for the container")
	flags.Var(&copts.aliases, "network-alias", "Add network-scoped alias for the container")
	flags.MarkHidden("net-alias")

	// Logging and storage
	flags.StringVar(&copts.loggingDriver, "log-driver", "", "Logging driver for the container")
	flags.StringVar(&copts.volumeDriver, "volume-driver", "", "Optional volume driver for the container")
	flags.Var(&copts.loggingOpts, "log-opt", "Log driver options")
	flags.Var(&copts.storageOpt, "storage-opt", "Storage driver options for the container")
	flags.Var(&copts.tmpfs, "tmpfs", "Mount a tmpfs directory")
	flags.Var(&copts.volumesFrom, "volumes-from", "Mount volumes from the specified container(s)")
	flags.VarP(&copts.volumes, "volume", "v", "Bind mount a volume")
	flags.Var(&copts.mounts, "mount", "Attach a filesystem mount to the container")

	// Health-checking
	flags.StringVar(&copts.healthCmd, "health-cmd", "", "Command to run to check health")
	flags.DurationVar(&copts.healthInterval, "health-interval", 0, "Time between running the check (ms|s|m|h) (default 0s)")
	flags.IntVar(&copts.healthRetries, "health-retries", 0, "Consecutive failures needed to report unhealthy")
	flags.DurationVar(&copts.healthTimeout, "health-timeout", 0, "Maximum time to allow one check to run (ms|s|m|h) (default 0s)")
	flags.DurationVar(&copts.healthStartPeriod, "health-start-period", 0, "Start period for the container to initialize before starting health-retries countdown (ms|s|m|h) (default 0s)")
	flags.SetAnnotation("health-start-period", "version", []string{"1.29"})
	flags.BoolVar(&copts.noHealthcheck, "no-healthcheck", false, "Disable any container-specified HEALTHCHECK")

	// Resource management
	flags.Uint16Var(&copts.blkioWeight, "blkio-weight", 0, "Block IO (relative weight), between 10 and 1000, or 0 to disable (default 0)")
	flags.Var(&copts.blkioWeightDevice, "blkio-weight-device", "Block IO weight (relative device weight)")
	flags.StringVar(&copts.containerIDFile, "cidfile", "", "Write the container ID to the file")
	flags.StringVar(&copts.cpusetCpus, "cpuset-cpus", "", "CPUs in which to allow execution (0-3, 0,1)")
	flags.StringVar(&copts.cpusetMems, "cpuset-mems", "", "MEMs in which to allow execution (0-3, 0,1)")
	flags.Int64Var(&copts.cpuCount, "cpu-count", 0, "CPU count (Windows only)")
	flags.SetAnnotation("cpu-count", "ostype", []string{"windows"})
	flags.Int64Var(&copts.cpuPercent, "cpu-percent", 0, "CPU percent (Windows only)")
	flags.SetAnnotation("cpu-percent", "ostype", []string{"windows"})
	flags.Int64Var(&copts.cpuPeriod, "cpu-period", 0, "Limit CPU CFS (Completely Fair Scheduler) period")
	flags.Int64Var(&copts.cpuQuota, "cpu-quota", 0, "Limit CPU CFS (Completely Fair Scheduler) quota")
	flags.Int64Var(&copts.cpuRealtimePeriod, "cpu-rt-period", 0, "Limit CPU real-time period in microseconds")
	flags.SetAnnotation("cpu-rt-period", "version", []string{"1.25"})
	flags.Int64Var(&copts.cpuRealtimeRuntime, "cpu-rt-runtime", 0, "Limit CPU real-time runtime in microseconds")
	flags.SetAnnotation("cpu-rt-runtime", "version", []string{"1.25"})
	flags.Int64VarP(&copts.cpuShares, "cpu-shares", "c", 0, "CPU shares (relative weight)")
	flags.Var(&copts.cpus, "cpus", "Number of CPUs")
	flags.SetAnnotation("cpus", "version", []string{"1.25"})
	flags.Var(&copts.deviceReadBps, "device-read-bps", "Limit read rate (bytes per second) from a device")
	flags.Var(&copts.deviceReadIOps, "device-read-iops", "Limit read rate (IO per second) from a device")
	flags.Var(&copts.deviceWriteBps, "device-write-bps", "Limit write rate (bytes per second) to a device")
	flags.Var(&copts.deviceWriteIOps, "device-write-iops", "Limit write rate (IO per second) to a device")
	flags.Var(&copts.ioMaxBandwidth, "io-maxbandwidth", "Maximum IO bandwidth limit for the system drive (Windows only)")
	flags.SetAnnotation("io-maxbandwidth", "ostype", []string{"windows"})
	flags.Uint64Var(&copts.ioMaxIOps, "io-maxiops", 0, "Maximum IOps limit for the system drive (Windows only)")
	flags.SetAnnotation("io-maxiops", "ostype", []string{"windows"})
	flags.Var(&copts.kernelMemory, "kernel-memory", "Kernel memory limit")
	flags.VarP(&copts.memory, "memory", "m", "Memory limit")
	flags.Var(&copts.memoryReservation, "memory-reservation", "Memory soft limit")
	flags.Var(&copts.memorySwap, "memory-swap", "Swap limit equal to memory plus swap: '-1' to enable unlimited swap")
	flags.Int64Var(&copts.swappiness, "memory-swappiness", -1, "Tune container memory swappiness (0 to 100)")
	flags.BoolVar(&copts.oomKillDisable, "oom-kill-disable", false, "Disable OOM Killer")
	flags.IntVar(&copts.oomScoreAdj, "oom-score-adj", 0, "Tune host's OOM preferences (-1000 to 1000)")
	flags.Int64Var(&copts.pidsLimit, "pids-limit", 0, "Tune container pids limit (set -1 for unlimited)")

	// Low-level execution (cgroups, namespaces, ...)
	flags.StringVar(&copts.cgroupParent, "cgroup-parent", "", "Optional parent cgroup for the container")
	flags.StringVar(&copts.ipcMode, "ipc", "", "IPC mode to use")
	flags.StringVar(&copts.isolation, "isolation", "", "Container isolation technology")
	flags.StringVar(&copts.pidMode, "pid", "", "PID namespace to use")
	flags.Var(&copts.shmSize, "shm-size", "Size of /dev/shm")
	flags.StringVar(&copts.utsMode, "uts", "", "UTS namespace to use")
	flags.StringVar(&copts.runtime, "runtime", "", "Runtime to use for this container")

	flags.BoolVar(&copts.init, "init", false, "Run an init inside the container that forwards signals and reaps processes")
	flags.SetAnnotation("init", "version", []string{"1.25"})
	return copts
}

type containerConfig struct {
	Config           *container.Config
	HostConfig       *container.HostConfig
	NetworkingConfig *networktypes.NetworkingConfig
}

// parse parses the args for the specified command and generates a Config,
// a HostConfig and returns them with the specified command.
// If the specified args are not valid, it will return an error.
// nolint: gocyclo
func parse(flags *pflag.FlagSet, copts *containerOptions, serverOS string) (*containerConfig, error) {
	var (
		attachStdin  = copts.attach.Get("stdin")
		attachStdout = copts.attach.Get("stdout")
		attachStderr = copts.attach.Get("stderr")
	)

	// Validate the input mac address
	if copts.macAddress != "" {
		if _, err := opts.ValidateMACAddress(copts.macAddress); err != nil {
			return nil, errors.Errorf("%s is not a valid mac address", copts.macAddress)
		}
	}
	if copts.stdin {
		attachStdin = true
	}
	// If -a is not set, attach to stdout and stderr
	if copts.attach.Len() == 0 {
		attachStdout = true
		attachStderr = true
	}

	var err error

	swappiness := copts.swappiness
	if swappiness != -1 && (swappiness < 0 || swappiness > 100) {
		return nil, errors.Errorf("invalid value: %d. Valid memory swappiness range is 0-100", swappiness)
	}

	mounts := copts.mounts.Value()
	if len(mounts) > 0 && copts.volumeDriver != "" {
		logrus.Warn("`--volume-driver` is ignored for volumes specified via `--mount`. Use `--mount type=volume,volume-driver=...` instead.")
	}
	var binds []string
	volumes := copts.volumes.GetMap()
	// add any bind targets to the list of container volumes
	for bind := range copts.volumes.GetMap() {
		parsed, _ := loader.ParseVolume(bind)
		if parsed.Source != "" {
			// after creating the bind mount we want to delete it from the copts.volumes values because
			// we do not want bind mounts being committed to image configs
			binds = append(binds, bind)
			// We should delete from the map (`volumes`) here, as deleting from copts.volumes will not work if
			// there are duplicates entries.
			delete(volumes, bind)
		}
	}

	// Can't evaluate options passed into --tmpfs until we actually mount
	tmpfs := make(map[string]string)
	for _, t := range copts.tmpfs.GetAll() {
		if arr := strings.SplitN(t, ":", 2); len(arr) > 1 {
			tmpfs[arr[0]] = arr[1]
		} else {
			tmpfs[arr[0]] = ""
		}
	}

	var (
		runCmd     strslice.StrSlice
		entrypoint strslice.StrSlice
	)

	if len(copts.Args) > 0 {
		runCmd = strslice.StrSlice(copts.Args)
	}

	if copts.entrypoint != "" {
		entrypoint = strslice.StrSlice{copts.entrypoint}
	} else if flags.Changed("entrypoint") {
		// if `--entrypoint=` is parsed then Entrypoint is reset
		entrypoint = []string{""}
	}

	publishOpts := copts.publish.GetAll()
	var ports map[nat.Port]struct{}
	var portBindings map[nat.Port][]nat.PortBinding

	ports, portBindings, err = nat.ParsePortSpecs(publishOpts)

	// If simple port parsing fails try to parse as long format
	if err != nil {
		publishOpts, err = parsePortOpts(publishOpts)
		if err != nil {
			return nil, err
		}

		ports, portBindings, err = nat.ParsePortSpecs(publishOpts)

		if err != nil {
			return nil, err
		}
	}

	// Merge in exposed ports to the map of published ports
	for _, e := range copts.expose.GetAll() {
		if strings.Contains(e, ":") {
			return nil, errors.Errorf("invalid port format for --expose: %s", e)
		}
		//support two formats for expose, original format <portnum>/[<proto>] or <startport-endport>/[<proto>]
		proto, port := nat.SplitProtoPort(e)
		//parse the start and end port and create a sequence of ports to expose
		//if expose a port, the start and end port are the same
		start, end, err := nat.ParsePortRange(port)
		if err != nil {
			return nil, errors.Errorf("invalid range format for --expose: %s, error: %s", e, err)
		}
		for i := start; i <= end; i++ {
			p, err := nat.NewPort(proto, strconv.FormatUint(i, 10))
			if err != nil {
				return nil, err
			}
			if _, exists := ports[p]; !exists {
				ports[p] = struct{}{}
			}
		}
	}

	// validate and parse device mappings. Note we do late validation of the
	// device path (as opposed to during flag parsing), as at the time we are
	// parsing flags, we haven't yet sent a _ping to the daemon to determine
	// what operating system it is.
	deviceMappings := []container.DeviceMapping{}
	for _, device := range copts.devices.GetAll() {
		var (
			validated     string
			deviceMapping container.DeviceMapping
			err           error
		)
		validated, err = validateDevice(device, serverOS)
		if err != nil {
			return nil, err
		}
		deviceMapping, err = parseDevice(validated, serverOS)
		if err != nil {
			return nil, err
		}
		deviceMappings = append(deviceMappings, deviceMapping)
	}

	// collect all the environment variables for the container
	envVariables, err := opts.ReadKVEnvStrings(copts.envFile.GetAll(), copts.env.GetAll())
	if err != nil {
		return nil, err
	}

	// collect all the labels for the container
	labels, err := opts.ReadKVStrings(copts.labelsFile.GetAll(), copts.labels.GetAll())
	if err != nil {
		return nil, err
	}

	pidMode := container.PidMode(copts.pidMode)
	if !pidMode.Valid() {
		return nil, errors.Errorf("--pid: invalid PID mode")
	}

	utsMode := container.UTSMode(copts.utsMode)
	if !utsMode.Valid() {
		return nil, errors.Errorf("--uts: invalid UTS mode")
	}

	usernsMode := container.UsernsMode(copts.usernsMode)
	if !usernsMode.Valid() {
		return nil, errors.Errorf("--userns: invalid USER mode")
	}

	restartPolicy, err := opts.ParseRestartPolicy(copts.restartPolicy)
	if err != nil {
		return nil, err
	}

	loggingOpts, err := parseLoggingOpts(copts.loggingDriver, copts.loggingOpts.GetAll())
	if err != nil {
		return nil, err
	}

	securityOpts, err := parseSecurityOpts(copts.securityOpt.GetAll())
	if err != nil {
		return nil, err
	}

	securityOpts, maskedPaths, readonlyPaths := parseSystemPaths(securityOpts)

	storageOpts, err := parseStorageOpts(copts.storageOpt.GetAll())
	if err != nil {
		return nil, err
	}

	// Healthcheck
	var healthConfig *container.HealthConfig
	haveHealthSettings := copts.healthCmd != "" ||
		copts.healthInterval != 0 ||
		copts.healthTimeout != 0 ||
		copts.healthStartPeriod != 0 ||
		copts.healthRetries != 0
	if copts.noHealthcheck {
		if haveHealthSettings {
			return nil, errors.Errorf("--no-healthcheck conflicts with --health-* options")
		}
		test := strslice.StrSlice{"NONE"}
		healthConfig = &container.HealthConfig{Test: test}
	} else if haveHealthSettings {
		var probe strslice.StrSlice
		if copts.healthCmd != "" {
			args := []string{"CMD-SHELL", copts.healthCmd}
			probe = strslice.StrSlice(args)
		}
		if copts.healthInterval < 0 {
			return nil, errors.Errorf("--health-interval cannot be negative")
		}
		if copts.healthTimeout < 0 {
			return nil, errors.Errorf("--health-timeout cannot be negative")
		}
		if copts.healthRetries < 0 {
			return nil, errors.Errorf("--health-retries cannot be negative")
		}
		if copts.healthStartPeriod < 0 {
			return nil, fmt.Errorf("--health-start-period cannot be negative")
		}

		healthConfig = &container.HealthConfig{
			Test:        probe,
			Interval:    copts.healthInterval,
			Timeout:     copts.healthTimeout,
			StartPeriod: copts.healthStartPeriod,
			Retries:     copts.healthRetries,
		}
	}

	resources := container.Resources{
		CgroupParent:         copts.cgroupParent,
		Memory:               copts.memory.Value(),
		MemoryReservation:    copts.memoryReservation.Value(),
		MemorySwap:           copts.memorySwap.Value(),
		MemorySwappiness:     &copts.swappiness,
		KernelMemory:         copts.kernelMemory.Value(),
		OomKillDisable:       &copts.oomKillDisable,
		NanoCPUs:             copts.cpus.Value(),
		CPUCount:             copts.cpuCount,
		CPUPercent:           copts.cpuPercent,
		CPUShares:            copts.cpuShares,
		CPUPeriod:            copts.cpuPeriod,
		CpusetCpus:           copts.cpusetCpus,
		CpusetMems:           copts.cpusetMems,
		CPUQuota:             copts.cpuQuota,
		CPURealtimePeriod:    copts.cpuRealtimePeriod,
		CPURealtimeRuntime:   copts.cpuRealtimeRuntime,
		PidsLimit:            &copts.pidsLimit,
		BlkioWeight:          copts.blkioWeight,
		BlkioWeightDevice:    copts.blkioWeightDevice.GetList(),
		BlkioDeviceReadBps:   copts.deviceReadBps.GetList(),
		BlkioDeviceWriteBps:  copts.deviceWriteBps.GetList(),
		BlkioDeviceReadIOps:  copts.deviceReadIOps.GetList(),
		BlkioDeviceWriteIOps: copts.deviceWriteIOps.GetList(),
		IOMaximumIOps:        copts.ioMaxIOps,
		IOMaximumBandwidth:   uint64(copts.ioMaxBandwidth),
		Ulimits:              copts.ulimits.GetList(),
		DeviceCgroupRules:    copts.deviceCgroupRules.GetAll(),
		Devices:              deviceMappings,
		DeviceRequests:       copts.gpus.Value(),
	}

	config := &container.Config{
		Hostname:     copts.hostname,
		Domainname:   copts.domainname,
		ExposedPorts: ports,
		User:         copts.user,
		Tty:          copts.tty,
		// TODO: deprecated, it comes from -n, --networking
		// it's still needed internally to set the network to disabled
		// if e.g. bridge is none in daemon opts, and in inspect
		NetworkDisabled: false,
		OpenStdin:       copts.stdin,
		AttachStdin:     attachStdin,
		AttachStdout:    attachStdout,
		AttachStderr:    attachStderr,
		Env:             envVariables,
		Cmd:             runCmd,
		Image:           copts.Image,
		Volumes:         volumes,
		MacAddress:      copts.macAddress,
		Entrypoint:      entrypoint,
		WorkingDir:      copts.workingDir,
		Labels:          opts.ConvertKVStringsToMap(labels),
		Healthcheck:     healthConfig,
	}
	if flags.Changed("stop-signal") {
		config.StopSignal = copts.stopSignal
	}
	if flags.Changed("stop-timeout") {
		config.StopTimeout = &copts.stopTimeout
	}

	hostConfig := &container.HostConfig{
		Binds:           binds,
		ContainerIDFile: copts.containerIDFile,
		OomScoreAdj:     copts.oomScoreAdj,
		AutoRemove:      copts.autoRemove,
		Privileged:      copts.privileged,
		PortBindings:    portBindings,
		Links:           copts.links.GetAll(),
		PublishAllPorts: copts.publishAll,
		// Make sure the dns fields are never nil.
		// New containers don't ever have those fields nil,
		// but pre created containers can still have those nil values.
		// See https://github.com/docker/docker/pull/17779
		// for a more detailed explanation on why we don't want that.
		DNS:            copts.dns.GetAllOrEmpty(),
		DNSSearch:      copts.dnsSearch.GetAllOrEmpty(),
		DNSOptions:     copts.dnsOptions.GetAllOrEmpty(),
		ExtraHosts:     copts.extraHosts.GetAll(),
		VolumesFrom:    copts.volumesFrom.GetAll(),
		IpcMode:        container.IpcMode(copts.ipcMode),
		NetworkMode:    container.NetworkMode(copts.netMode.NetworkMode()),
		PidMode:        pidMode,
		UTSMode:        utsMode,
		UsernsMode:     usernsMode,
		CapAdd:         strslice.StrSlice(copts.capAdd.GetAll()),
		CapDrop:        strslice.StrSlice(copts.capDrop.GetAll()),
		GroupAdd:       copts.groupAdd.GetAll(),
		RestartPolicy:  restartPolicy,
		SecurityOpt:    securityOpts,
		StorageOpt:     storageOpts,
		ReadonlyRootfs: copts.readonlyRootfs,
		LogConfig:      container.LogConfig{Type: copts.loggingDriver, Config: loggingOpts},
		VolumeDriver:   copts.volumeDriver,
		Isolation:      container.Isolation(copts.isolation),
		ShmSize:        copts.shmSize.Value(),
		Resources:      resources,
		Tmpfs:          tmpfs,
		Sysctls:        copts.sysctls.GetAll(),
		Runtime:        copts.runtime,
		Mounts:         mounts,
		MaskedPaths:    maskedPaths,
		ReadonlyPaths:  readonlyPaths,
	}

	if copts.autoRemove && !hostConfig.RestartPolicy.IsNone() {
		return nil, errors.Errorf("Conflicting options: --restart and --rm")
	}

	// only set this value if the user provided the flag, else it should default to nil
	if flags.Changed("init") {
		hostConfig.Init = &copts.init
	}

	// When allocating stdin in attached mode, close stdin at client disconnect
	if config.OpenStdin && config.AttachStdin {
		config.StdinOnce = true
	}

	networkingConfig := &networktypes.NetworkingConfig{
		EndpointsConfig: make(map[string]*networktypes.EndpointSettings),
	}

	networkingConfig.EndpointsConfig, err = parseNetworkOpts(copts)
	if err != nil {
		return nil, err
	}

	return &containerConfig{
		Config:           config,
		HostConfig:       hostConfig,
		NetworkingConfig: networkingConfig,
	}, nil
}

// parseNetworkOpts converts --network advanced options to endpoint-specs, and combines
// them with the old --network-alias and --links. If returns an error if conflicting options
// are found.
//
// this function may return _multiple_ endpoints, which is not currently supported
// by the daemon, but may be in future; it's up to the daemon to produce an error
// in case that is not supported.
func parseNetworkOpts(copts *containerOptions) (map[string]*networktypes.EndpointSettings, error) {
	var (
		endpoints                         = make(map[string]*networktypes.EndpointSettings, len(copts.netMode.Value()))
		hasUserDefined, hasNonUserDefined bool
	)

	for i, n := range copts.netMode.Value() {
		if container.NetworkMode(n.Target).IsUserDefined() {
			hasUserDefined = true
		} else {
			hasNonUserDefined = true
		}
		if i == 0 {
			// The first network corresponds with what was previously the "only"
			// network, and what would be used when using the non-advanced syntax
			// `--network-alias`, `--link`, `--ip`, `--ip6`, and `--link-local-ip`
			// are set on this network, to preserve backward compatibility with
			// the non-advanced notation
			if err := applyContainerOptions(&n, copts); err != nil {
				return nil, err
			}
		}
		ep, err := parseNetworkAttachmentOpt(n)
		if err != nil {
			return nil, err
		}
		if _, ok := endpoints[n.Target]; ok {
			return nil, errdefs.InvalidParameter(errors.Errorf("network %q is specified multiple times", n.Target))
		}

		// For backward compatibility: if no custom options are provided for the network,
		// and only a single network is specified, omit the endpoint-configuration
		// on the client (the daemon will still create it when creating the container)
		if i == 0 && len(copts.netMode.Value()) == 1 {
			if ep == nil || reflect.DeepEqual(*ep, networktypes.EndpointSettings{}) {
				continue
			}
		}
		endpoints[n.Target] = ep
	}
	if hasUserDefined && hasNonUserDefined {
		return nil, errdefs.InvalidParameter(errors.New("conflicting options: cannot attach both user-defined and non-user-defined network-modes"))
	}
	return endpoints, nil
}

func applyContainerOptions(n *opts.NetworkAttachmentOpts, copts *containerOptions) error {
	// TODO should copts.MacAddress actually be set on the first network? (currently it's not)
	// TODO should we error if _any_ advanced option is used? (i.e. forbid to combine advanced notation with the "old" flags (`--network-alias`, `--link`, `--ip`, `--ip6`)?
	if len(n.Aliases) > 0 && copts.aliases.Len() > 0 {
		return errdefs.InvalidParameter(errors.New("conflicting options: cannot specify both --network-alias and per-network alias"))
	}
	if len(n.Links) > 0 && copts.links.Len() > 0 {
		return errdefs.InvalidParameter(errors.New("conflicting options: cannot specify both --link and per-network links"))
	}
	if copts.aliases.Len() > 0 {
		n.Aliases = make([]string, copts.aliases.Len())
		copy(n.Aliases, copts.aliases.GetAll())
	}
	if copts.links.Len() > 0 {
		n.Links = make([]string, copts.links.Len())
		copy(n.Links, copts.links.GetAll())
	}

	// TODO add IPv4/IPv6 options to the csv notation for --network, and error-out in case of conflicting options
	n.IPv4Address = copts.ipv4Address
	n.IPv6Address = copts.ipv6Address

	// TODO should linkLocalIPs be added to the _first_ network only, or to _all_ networks? (should this be a per-network option as well?)
	if copts.linkLocalIPs.Len() > 0 {
		n.LinkLocalIPs = make([]string, copts.linkLocalIPs.Len())
		copy(n.LinkLocalIPs, copts.linkLocalIPs.GetAll())
	}
	return nil
}

func parseNetworkAttachmentOpt(ep opts.NetworkAttachmentOpts) (*networktypes.EndpointSettings, error) {
	if strings.TrimSpace(ep.Target) == "" {
		return nil, errors.New("no name set for network")
	}
	if !container.NetworkMode(ep.Target).IsUserDefined() {
		if len(ep.Aliases) > 0 {
			return nil, errors.New("network-scoped aliases are only supported for user-defined networks")
		}
		if len(ep.Links) > 0 {
			return nil, errors.New("links are only supported for user-defined networks")
		}
	}

	epConfig := &networktypes.EndpointSettings{}
	epConfig.Aliases = append(epConfig.Aliases, ep.Aliases...)
	if len(ep.DriverOpts) > 0 {
		epConfig.DriverOpts = make(map[string]string)
		epConfig.DriverOpts = ep.DriverOpts
	}
	if len(ep.Links) > 0 {
		epConfig.Links = ep.Links
	}
	if ep.IPv4Address != "" || ep.IPv6Address != "" || len(ep.LinkLocalIPs) > 0 {
		epConfig.IPAMConfig = &networktypes.EndpointIPAMConfig{
			IPv4Address:  ep.IPv4Address,
			IPv6Address:  ep.IPv6Address,
			LinkLocalIPs: ep.LinkLocalIPs,
		}
	}
	return epConfig, nil
}

func parsePortOpts(publishOpts []string) ([]string, error) {
	optsList := []string{}
	for _, publish := range publishOpts {
		params := map[string]string{"protocol": "tcp"}
		for _, param := range strings.Split(publish, ",") {
			opt := strings.Split(param, "=")
			if len(opt) < 2 {
				return optsList, errors.Errorf("invalid publish opts format (should be name=value but got '%s')", param)
			}

			params[opt[0]] = opt[1]
		}
		optsList = append(optsList, fmt.Sprintf("%s:%s/%s", params["published"], params["target"], params["protocol"]))
	}
	return optsList, nil
}

func parseLoggingOpts(loggingDriver string, loggingOpts []string) (map[string]string, error) {
	loggingOptsMap := opts.ConvertKVStringsToMap(loggingOpts)
	if loggingDriver == "none" && len(loggingOpts) > 0 {
		return map[string]string{}, errors.Errorf("invalid logging opts for driver %s", loggingDriver)
	}
	return loggingOptsMap, nil
}

// takes a local seccomp daemon, reads the file contents for sending to the daemon
func parseSecurityOpts(securityOpts []string) ([]string, error) {
	for key, opt := range securityOpts {
		con := strings.SplitN(opt, "=", 2)
		if len(con) == 1 && con[0] != "no-new-privileges" {
			if strings.Contains(opt, ":") {
				con = strings.SplitN(opt, ":", 2)
			} else {
				return securityOpts, errors.Errorf("Invalid --security-opt: %q", opt)
			}
		}
		if con[0] == "seccomp" && con[1] != "unconfined" {
			f, err := ioutil.ReadFile(con[1])
			if err != nil {
				return securityOpts, errors.Errorf("opening seccomp profile (%s) failed: %v", con[1], err)
			}
			b := bytes.NewBuffer(nil)
			if err := json.Compact(b, f); err != nil {
				return securityOpts, errors.Errorf("compacting json for seccomp profile (%s) failed: %v", con[1], err)
			}
			securityOpts[key] = fmt.Sprintf("seccomp=%s", b.Bytes())
		}
	}

	return securityOpts, nil
}

// parseSystemPaths checks if `systempaths=unconfined` security option is set,
// and returns the `MaskedPaths` and `ReadonlyPaths` accordingly. An updated
// list of security options is returned with this option removed, because the
// `unconfined` option is handled client-side, and should not be sent to the
// daemon.
func parseSystemPaths(securityOpts []string) (filtered, maskedPaths, readonlyPaths []string) {
	filtered = securityOpts[:0]
	for _, opt := range securityOpts {
		if opt == "systempaths=unconfined" {
			maskedPaths = []string{}
			readonlyPaths = []string{}
		} else {
			filtered = append(filtered, opt)
		}
	}

	return filtered, maskedPaths, readonlyPaths
}

// parses storage options per container into a map
func parseStorageOpts(storageOpts []string) (map[string]string, error) {
	m := make(map[string]string)
	for _, option := range storageOpts {
		if strings.Contains(option, "=") {
			opt := strings.SplitN(option, "=", 2)
			m[opt[0]] = opt[1]
		} else {
			return nil, errors.Errorf("invalid storage option")
		}
	}
	return m, nil
}

// parseDevice parses a device mapping string to a container.DeviceMapping struct
func parseDevice(device, serverOS string) (container.DeviceMapping, error) {
	switch serverOS {
	case "linux":
		return parseLinuxDevice(device)
	case "windows":
		return parseWindowsDevice(device)
	}
	return container.DeviceMapping{}, errors.Errorf("unknown server OS: %s", serverOS)
}

// parseLinuxDevice parses a device mapping string to a container.DeviceMapping struct
// knowing that the target is a Linux daemon
func parseLinuxDevice(device string) (container.DeviceMapping, error) {
	src := ""
	dst := ""
	permissions := "rwm"
	arr := strings.Split(device, ":")
	switch len(arr) {
	case 3:
		permissions = arr[2]
		fallthrough
	case 2:
		if validDeviceMode(arr[1]) {
			permissions = arr[1]
		} else {
			dst = arr[1]
		}
		fallthrough
	case 1:
		src = arr[0]
	default:
		return container.DeviceMapping{}, errors.Errorf("invalid device specification: %s", device)
	}

	if dst == "" {
		dst = src
	}

	deviceMapping := container.DeviceMapping{
		PathOnHost:        src,
		PathInContainer:   dst,
		CgroupPermissions: permissions,
	}
	return deviceMapping, nil
}

// parseWindowsDevice parses a device mapping string to a container.DeviceMapping struct
// knowing that the target is a Windows daemon
func parseWindowsDevice(device string) (container.DeviceMapping, error) {
	return container.DeviceMapping{PathOnHost: device}, nil
}

// validateDeviceCgroupRule validates a device cgroup rule string format
// It will make sure 'val' is in the form:
//    'type major:minor mode'
func validateDeviceCgroupRule(val string) (string, error) {
	if deviceCgroupRuleRegexp.MatchString(val) {
		return val, nil
	}

	return val, errors.Errorf("invalid device cgroup format '%s'", val)
}

// validDeviceMode checks if the mode for device is valid or not.
// Valid mode is a composition of r (read), w (write), and m (mknod).
func validDeviceMode(mode string) bool {
	var legalDeviceMode = map[rune]bool{
		'r': true,
		'w': true,
		'm': true,
	}
	if mode == "" {
		return false
	}
	for _, c := range mode {
		if !legalDeviceMode[c] {
			return false
		}
		legalDeviceMode[c] = false
	}
	return true
}

// validateDevice validates a path for devices
func validateDevice(val string, serverOS string) (string, error) {
	switch serverOS {
	case "linux":
		return validateLinuxPath(val, validDeviceMode)
	case "windows":
		// Windows does validation entirely server-side
		return val, nil
	}
	return "", errors.Errorf("unknown server OS: %s", serverOS)
}

// validateLinuxPath is the implementation of validateDevice knowing that the
// target server operating system is a Linux daemon.
// It will make sure 'val' is in the form:
//    [host-dir:]container-path[:mode]
// It also validates the device mode.
func validateLinuxPath(val string, validator func(string) bool) (string, error) {
	var containerPath string
	var mode string

	if strings.Count(val, ":") > 2 {
		return val, errors.Errorf("bad format for path: %s", val)
	}

	split := strings.SplitN(val, ":", 3)
	if split[0] == "" {
		return val, errors.Errorf("bad format for path: %s", val)
	}
	switch len(split) {
	case 1:
		containerPath = split[0]
		val = path.Clean(containerPath)
	case 2:
		if isValid := validator(split[1]); isValid {
			containerPath = split[0]
			mode = split[1]
			val = fmt.Sprintf("%s:%s", path.Clean(containerPath), mode)
		} else {
			containerPath = split[1]
			val = fmt.Sprintf("%s:%s", split[0], path.Clean(containerPath))
		}
	case 3:
		containerPath = split[1]
		mode = split[2]
		if isValid := validator(split[2]); !isValid {
			return val, errors.Errorf("bad mode specified: %s", mode)
		}
		val = fmt.Sprintf("%s:%s:%s", split[0], containerPath, mode)
	}

	if !path.IsAbs(containerPath) {
		return val, errors.Errorf("%s is not an absolute path", containerPath)
	}
	return val, nil
}

// validateAttach validates that the specified string is a valid attach option.
func validateAttach(val string) (string, error) {
	s := strings.ToLower(val)
	for _, str := range []string{"stdin", "stdout", "stderr"} {
		if s == str {
			return s, nil
		}
	}
	return val, errors.Errorf("valid streams are STDIN, STDOUT and STDERR")
}

func validateAPIVersion(c *containerConfig, serverAPIVersion string) error {
	for _, m := range c.HostConfig.Mounts {
		if m.BindOptions != nil && m.BindOptions.NonRecursive && versions.LessThan(serverAPIVersion, "1.40") {
			return errors.Errorf("bind-nonrecursive requires API v1.40 or later")
		}
	}
	return nil
}
