package publish

import (
	"fmt"

	"github.com/drone/drone/shared/build/buildfile"
)

// use npm trick instead of running npm adduser that requires stdin
var npmLoginCmd = `
cat <<EOF > ~/.npmrc
_auth = $(echo "%s:%s" | tr -d "\r\n" | base64)
email = %s
EOF
`

type NPM struct {
	// The Email address used by NPM to connect
	// and publish to a repository
	Email string `yaml:"email,omitempty"`

	// The Username used by NPM to connect
	// and publish to a repository
	Username string `yaml:"username,omitempty"`

	// The Password used by NPM to connect
	// and publish to a repository
	Password string `yaml:"password,omitempty"`

	// Fails if the package name and version combination already
	// exists in the registry. Overwrites when the "--force" flag is set.
	Force bool `yaml:"force"`

	// The registry URL of custom npm repository
	Registry string `yaml:"registry,omitempty"`

	// A folder containing the package.json file
	Folder string `yaml:"folder,omitempty"`

	// Registers the published package with the given tag
	Tag string `yaml:"tag,omitempty"`

	Branch string `yaml:"branch,omitempty"`
}

func (n *NPM) Write(f *buildfile.Buildfile) {

	if len(n.Email) == 0 || len(n.Username) == 0 || len(n.Password) == 0 {
		return
	}

	npmPublishCmd := "npm publish %s"

	if n.Tag != "" {
		npmPublishCmd += fmt.Sprintf(" --tag %s", n.Tag)
	}

	if n.Force {
		npmPublishCmd += " --force"
	}

	f.WriteCmdSilent("echo 'publishing to NPM ...'")

	// Login to registry
	f.WriteCmdSilent(fmt.Sprintf(npmLoginCmd, n.Username, n.Password, n.Email))

	// Setup custom npm registry
	if n.Registry != "" {
		f.WriteCmdSilent(fmt.Sprintf("npm config set registry %s", n.Registry))
	}

	f.WriteCmd(fmt.Sprintf(npmPublishCmd, n.Folder))
}