package telegram

import (
	"strconv"

	json "github.com/pquerna/ffjson/ffjson"
	http "github.com/valyala/fasthttp"
)

// SendPhotoParameters represents data for SendPhoto method.
type SendPhotoParameters struct {
	// Unique identifier for the target chat
	ChatID int64 `json:"chat_id"`

	// Photo to send. Pass a file_id as String to send a photo that exists on the
	// Telegram servers (recommended), pass an HTTP URL as a String for Telegram
	// to get a photo from the Internet, or upload a new photo using
	// multipart/form-data.
	Photo InputFile `json:"photo"`

	// Photo caption (may also be used when resending photos by file_id), 0-200
	// characters
	Caption string `json:"caption,omitempty"`

	// Send Markdown or HTML, if you want Telegram apps to show bold, italic,
	// fixed-width text or inline URLs in the media caption.
	ParseMode string `json:"parse_mode,omitempty"`

	// Disables link previews for links in this message
	DisableWebPagePreview bool `json:"disable_web_page_preview,omitempty"`

	// Sends the message silently. Users will receive a notification with no
	// sound.
	DisableNotification bool `json:"disable_notification,omitempty"`

	// If the message is a reply, ID of the original message
	ReplyToMessageID int `json:"reply_to_message_id,omitempty"`

	// Additional interface options. A JSON-serialized object for an inline
	// keyboard, custom reply keyboard, instructions to remove reply keyboard or
	// to force a reply from the user.
	ReplyMarkup interface{} `json:"reply_markup,omitempty"`
}

// NewPhoto creates SendPhotoParameters only with required parameters.
func NewPhoto(chatID int64, photo interface{}) *SendPhotoParameters {
	return &SendPhotoParameters{
		ChatID: chatID,
		Photo:  photo,
	}
}

// SendPhoto send photos. On success, the sent Message is returned.
func (bot *Bot) SendPhoto(params *SendPhotoParameters) (msg *Message, err error) {
	args := http.AcquireArgs()
	defer http.ReleaseArgs(args)
	args.Add("chat_id", strconv.FormatInt(params.ChatID, 10))

	if params.Caption != "" {
		args.Add("caption", params.Caption)
	}

	if params.ReplyMarkup != nil {
		dst, err := json.Marshal(params.ReplyMarkup)
		if err != nil {
			return nil, err
		}
		args.Add("reply_markup", string(dst))
	}

	if params.ReplyToMessageID != 0 {
		args.Add("reply_to_message_id", strconv.Itoa(params.ReplyToMessageID))
	}

	args.Add("disable_notification", strconv.FormatBool(params.DisableNotification))

	resp, err := bot.Upload(MethodSendPhoto, "photo", "", params.Photo, args)
	if err != nil {
		return
	}

	msg = new(Message)
	err = json.Unmarshal(*resp.Result, msg)
	return
}