package command

import (
	"fmt"
	"io"
	"os"
	"strings"

	"github.com/hashicorp/vault/helper/kv-builder"
)

// WriteCommand is a Command that puts data into the Vault.
type WriteCommand struct {
	Meta

	// The fields below can be overwritten for tests
	testStdin io.Reader
}

func (c *WriteCommand) Run(args []string) int {
	var format string
	var force bool
	flags := c.Meta.FlagSet("write", FlagSetDefault)
	flags.StringVar(&format, "format", "table", "")
	flags.BoolVar(&force, "force", false, "")
	flags.BoolVar(&force, "f", false, "")
	flags.Usage = func() { c.Ui.Error(c.Help()) }
	if err := flags.Parse(args); err != nil {
		return 1
	}

	args = flags.Args()
	if len(args) < 2 && !force {
		c.Ui.Error("write expects at least two arguments")
		flags.Usage()
		return 1
	}

	path := args[0]
	if path[0] == '/' {
		path = path[1:]
	}

	data, err := c.parseData(args[1:])
	if err != nil {
		c.Ui.Error(fmt.Sprintf(
			"Error loading data: %s", err))
		return 1
	}

	client, err := c.Client()
	if err != nil {
		c.Ui.Error(fmt.Sprintf(
			"Error initializing client: %s", err))
		return 2
	}

	secret, err := client.Logical().Write(path, data)
	if err != nil {
		c.Ui.Error(fmt.Sprintf(
			"Error writing data to %s: %s", path, err))
		return 1
	}

	if secret == nil {
		c.Ui.Output(fmt.Sprintf("Success! Data written to: %s", path))
		return 0
	}

	return OutputSecret(c.Ui, format, secret)
}

func (c *WriteCommand) parseData(args []string) (map[string]interface{}, error) {
	var stdin io.Reader = os.Stdin
	if c.testStdin != nil {
		stdin = c.testStdin
	}

	builder := &kvbuilder.Builder{Stdin: stdin}
	if err := builder.Add(args...); err != nil {
		return nil, err
	}

	return builder.Map(), nil
}

func (c *WriteCommand) Synopsis() string {
	return "Write secrets or configuration into Vault"
}

func (c *WriteCommand) Help() string {
	helpText := `
Usage: vault write [options] path [data]

  Write data (secrets or configuration) into Vault.

  Write sends data into Vault at the given path. The behavior of the write
  is determined by the backend at the given path. For example, writing
  to "aws/policy/ops" will create an "ops" IAM policy for the AWS backend
  (configuration), but writing to "consul/foo" will write a value directly
  into Consul at that key. Check the documentation of the logical backend
  you're using for more information on key structure.

  Data is sent via additional arguments in "key=value" pairs. If value
  begins with an "@", then it is loaded from a file. Write expects data in the
	file to be in JSON format. If you want to start the value with a literal "@",
	then prefix the "@" with a slash: "\@".

General Options:

  ` + generalOptionsUsage() + `

Write Options:

  -f | -force             Force the write to continue without any data values
                          specified. This allows writing to keys that do not
                          need or expect any fields to be specified.

`
	return strings.TrimSpace(helpText)
}