package discordgo

import (
	"fmt"
	"strings"
)

// A User stores all data for an individual Discord user.
type User struct {
	ID            string `json:"id"`
	Email         string `json:"email"`
	Username      string `json:"username"`
	Avatar        string `json:"avatar"`
	Discriminator string `json:"discriminator"`
	Token         string `json:"token"`
	Verified      bool   `json:"verified"`
	MFAEnabled    bool   `json:"mfa_enabled"`
	Bot           bool   `json:"bot"`
}

// String returns a unique identifier of the form username#discriminator
func (u *User) String() string {
	return fmt.Sprintf("%s#%s", u.Username, u.Discriminator)
}

// Mention return a string which mentions the user
func (u *User) Mention() string {
	return fmt.Sprintf("<@%s>", u.ID)
}

// AvatarURL returns a URL to the user's avatar.
//    size:    The size of the user's avatar as a power of two
//             if size is an empty string, no size parameter will
//             be added to the URL.
func (u *User) AvatarURL(size string) string {
	var URL string
	if strings.HasPrefix(u.Avatar, "a_") {
		URL = EndpointUserAvatarAnimated(u.ID, u.Avatar)
	} else {
		URL = EndpointUserAvatar(u.ID, u.Avatar)
	}

	if size != "" {
		return URL + "?size=" + size
	}
	return URL
}