package telegram

import "strings"

// IsPrivate checks that the current chat is a private chat with single user.
func (c *Chat) IsPrivate() bool {
	return c != nil && strings.EqualFold(c.Type, ChatPrivate)
}

// IsGroup checks that the current chat is a group.
func (c *Chat) IsGroup() bool {
	return c != nil && strings.EqualFold(c.Type, ChatGroup)
}

// IsSuperGroup checks that the current chat is a supergroup.
func (c *Chat) IsSuperGroup() bool {
	return c != nil && strings.EqualFold(c.Type, ChatSuperGroup)
}

// IsChannel checks that the current chat is a channel.
func (c *Chat) IsChannel() bool {
	return c != nil && strings.EqualFold(c.Type, ChatChannel)
}

// HasPinnedMessage checks that the current chat has a pinned message.
func (c *Chat) HasPinnedMessage() bool {
	return c != nil && c.PinnedMessage != nil
}

// HasStickerSet checks that the current chat has a sticker set.
func (c *Chat) HasStickerSet() bool {
	return c != nil && c.StickerSetName != ""
}

// StickerSet return StickerSet structure if StickerSetName is available.
func (c *Chat) StickerSet(bot *Bot) *StickerSet {
	if !c.HasStickerSet() || bot == nil {
		return nil
	}

	set, err := bot.GetStickerSet(c.StickerSetName)
	if err != nil {
		return nil
	}

	return set
}

// FullName returns the full name of chat or FirstName if LastName is not available.
func (c *Chat) FullName() string {
	if c == nil {
		return ""
	}

	if c.HasLastName() {
		return c.FirstName + " " + c.LastName
	}

	return c.FirstName
}

// HaveLastName checks what the current user has a LastName.
func (c *Chat) HasLastName() bool {
	return c != nil && c.LastName != ""
}

// HaveUsername checks what the current user has a username.
func (c *Chat) HasUsername() bool {
	return c != nil && c.Username != ""
}

func (c *Chat) HasDescription() bool {
	return c != nil && c.Description != ""
}

func (c *Chat) HasInviteLink() bool {
	return c != nil && c.InviteLink != ""
}