package agent

import (
	"strings"

	"github.com/mitchellh/cli"
)

// Command is a Command implementation that runs a Consul agent.
// The command will not end unless a shutdown message is sent on the
// ShutdownCh. If two messages are sent on the ShutdownCh it will forcibly
// exit.
type Command struct {
	Revision          string
	Version           string
	VersionPrerelease string
	Ui                cli.Ui
	ShutdownCh        <-chan struct{}
}

func (c *Command) Run(args []string) int {
	c.Ui = &cli.PrefixedUi{
		OutputPrefix: "==> ",
		InfoPrefix:   "    ",
		ErrorPrefix:  "==> ",
		Ui:           c.Ui,
	}
	return 0
}

func (c *Command) Synopsis() string {
	return "Runs a Nomad agent"
}

func (c *Command) Help() string {
	helpText := `
Usage: nomad agent [options]

  Starts the Nomad agent and runs until an interrupt is received.
  The agent may be a client and/or server.

Options:

  -advertise=addr          Sets the advertise address to use
  -atlas=org/name          Sets the Atlas infrastructure name, enables SCADA.
  -atlas-join              Enables auto-joining the Atlas cluster
  -atlas-token=token       Provides the Atlas API token
  -bootstrap               Sets server to bootstrap mode
  -bind=0.0.0.0            Sets the bind address for cluster communication
  -bootstrap-expect=0      Sets server to expect bootstrap mode.
  -client=127.0.0.1        Sets the address to bind for client access.
                           This includes RPC, DNS, HTTP and HTTPS (if configured)
  -config-file=foo         Path to a JSON file to read configuration from.
                           This can be specified multiple times.
  -config-dir=foo          Path to a directory to read configuration files
                           from. This will read every file ending in ".json"
                           as configuration in this directory in alphabetical
                           order. This can be specified multiple times.
  -data-dir=path           Path to a data directory to store agent state
  -recursor=1.2.3.4        Address of an upstream DNS server.
                           Can be specified multiple times.
  -dc=east-aws             Datacenter of the agent
  -encrypt=key             Provides the gossip encryption key
  -join=1.2.3.4            Address of an agent to join at start time.
                           Can be specified multiple times.
  -join-wan=1.2.3.4        Address of an agent to join -wan at start time.
                           Can be specified multiple times.
  -retry-join=1.2.3.4      Address of an agent to join at start time with
                           retries enabled. Can be specified multiple times.
  -retry-interval=30s      Time to wait between join attempts.
  -retry-max=0             Maximum number of join attempts. Defaults to 0, which
                           will retry indefinitely.
  -retry-join-wan=1.2.3.4  Address of an agent to join -wan at start time with
                           retries enabled. Can be specified multiple times.
  -retry-interval-wan=30s  Time to wait between join -wan attempts.
  -retry-max-wan=0         Maximum number of join -wan attempts. Defaults to 0, which
                           will retry indefinitely.
  -log-level=info          Log level of the agent.
  -node=hostname           Name of this node. Must be unique in the cluster
  -protocol=N              Sets the protocol version. Defaults to latest.
  -rejoin                  Ignores a previous leave and attempts to rejoin the cluster.
  -server                  Switches agent to server mode.
  -syslog                  Enables logging to syslog
  -ui-dir=path             Path to directory containing the Web UI resources
  -pid-file=path           Path to file to store agent PID
 `
	return strings.TrimSpace(helpText)
}