package telegram

import "net/url"

func (entity *MessageEntity) ParseURL(messageText string) *url.URL {
	if entity == nil {
		return nil
	}

	var err error
	parsedURL := new(url.URL)
	switch {
	case entity.IsTextLink():
		parsedURL, err = url.Parse(entity.URL)
	case entity.IsURL():
		if messageText == "" {
			return nil
		}

		rawMessageText := []rune(messageText)
		if len(rawMessageText) < (entity.Offset + entity.Length) {
			return nil
		}

		from := entity.Offset
		to := from + entity.Length
		parsedURL, err = url.Parse(string([]rune(messageText)[from:to]))
	}
	if err != nil {
		return nil
	}

	return parsedURL
}

func (entity *MessageEntity) IsBold() bool {
	if entity == nil {
		return false
	}

	return entity.Type == EntityBold
}

func (entity *MessageEntity) IsBotCommand() bool {
	if entity == nil {
		return false
	}

	return entity.Type == EntityBotCommand
}

func (entity *MessageEntity) IsCode() bool {
	if entity == nil {
		return false
	}

	return entity.Type == EntityCode
}

func (entity *MessageEntity) IsEmail() bool {
	if entity == nil {
		return false
	}

	return entity.Type == EntityEmail
}

func (entity *MessageEntity) IsHashTag() bool {
	if entity == nil {
		return false
	}

	return entity.Type == EntityHashtag
}

func (entity *MessageEntity) IsItalic() bool {
	if entity == nil {
		return false
	}

	return entity.Type == EntityItalic
}

func (entity *MessageEntity) IsMention() bool {
	if entity == nil {
		return false
	}

	return entity.Type == EntityMention
}

func (entity *MessageEntity) IsPre() bool {
	if entity == nil {
		return false
	}

	return entity.Type == EntityPre
}

func (entity *MessageEntity) IsTextLink() bool {
	if entity == nil {
		return false
	}

	return entity.Type == EntityTextLink
}

func (entity *MessageEntity) IsTextMention() bool {
	if entity == nil {
		return false
	}

	return entity.Type == EntityTextMention
}

func (entity *MessageEntity) IsURL() bool {
	if entity == nil {
		return false
	}

	return entity.Type == EntityURL
}