// keybase/api implements an interface for interacting with the Keybase Chat, Team, and Wallet APIs
package keybase

import (
	"encoding/json"
	"os/exec"
)

type Keybase struct {
	path string
}

type keybase interface {
	ChatSendText(user string, message ...string) (chatOutResultResult, error)
	ChatSendTextTeam(team, channel, message string) (chatOutResultResult, error)
	ChatSendReaction(user, reaction string, messageId int) (chatOutResultResult, error)
	ChatSendReactionTeam(team, channel, reaction string, messageId int) (chatOutResultResult, error)
	ChatDeleteMessage(user string, messageId int) (chatOutResultResult, error)
	ChatDeleteMessageTeam(team, channel string, messageId int) (chatOutResultResult, error)
	ChatList() ([]chatOutResultConversations, error)
	LoggedIn() bool
	Username() string
	Version() string
}

type status struct {
	Username string `json:"Username"`
	LoggedIn bool   `json:"LoggedIn"`
}

// New() returns a new instance of Keybase object. Optionally, you can pass a string containing the path to the Keybase executable as the first argument.
func New(path ...string) Keybase {
	if len(path) < 1 {
		return Keybase{path: "/usr/bin/keybase"}
	}
	return Keybase{path: path[0]}
}

// Username() returns the username of the currently logged-in Keybase user.
func (k Keybase) Username() string {
	cmd := exec.Command(k.path, "status", "-j")
	cmdOut, err := cmd.Output()
	if err != nil {
		return ""
	}

	var s status
	json.Unmarshal(cmdOut, &s)

	return s.Username
}

// LoggedIn() returns true if Keybase is currently logged in, otherwise returns false.
func (k Keybase) LoggedIn() bool {
	cmd := exec.Command(k.path, "status", "-j")
	cmdOut, err := cmd.Output()
	if err != nil {
		return false
	}

	var s status
	json.Unmarshal(cmdOut, &s)

	return s.LoggedIn
}

// Version() returns the version string of the client.
func (k Keybase) Version() string {
	cmd := exec.Command(k.path, "version", "-S", "-f", "s")
	cmdOut, err := cmd.Output()
	if err != nil {
		return ""
	}

	return string(cmdOut)
}