package moon

import (
	"github.com/NicoNex/echotron/v3"
	"github.com/davecgh/go-spew/spew"
)

// Telegram основная горутинка, реализующая бота.
func Telegram(cfg MyConfig) {
	Tg = echotron.NewAPI(cfg.Token)

	for u := range echotron.PollingUpdates(cfg.Token) {
		telegramMsgParser(u)
	}
}

// telegramMsgParser parses events generated by echotron.
func telegramMsgParser(msg *echotron.Update) {
	// We not interested in text message events, yet at least.
	if msg.Message.Text != "" {
		if msg.Message.ReplyToMessage == nil {
			Log.Infof(
				"User %s %s (username = %s, id = %d) in %s %s (%d) says: %s",
				msg.Message.From.FirstName,
				msg.Message.From.LastName,
				msg.Message.From.Username,
				msg.Message.From.ID,
				msg.Message.Chat.Type,
				msg.Message.Chat.Title,
				msg.Message.Chat.ID,
				msg.Message.Text,
			)
		} else {
			Log.Infof(
				"User %s %s (username = %s, id = %d) in %s %s (%d) replies to message %d by %s %s (username = %s, id = %d): %s",
				msg.Message.From.FirstName,
				msg.Message.From.LastName,
				msg.Message.From.Username,
				msg.Message.From.ID,
				msg.Message.Chat.Type,
				msg.Message.Chat.Title,
				msg.Message.Chat.ID,
				msg.Message.ReplyToMessage.ID,
				msg.Message.ReplyToMessage.From.FirstName,
				msg.Message.ReplyToMessage.From.LastName,
				msg.Message.ReplyToMessage.From.Username,
				msg.Message.ReplyToMessage.From.ID,
				msg.Message.Text,
			)
		}

		Log.Info(spew.Sdump(msg.Message))

		return
	}

	/*
		Итак, что нам интересно?
		1. Приход chat members
		2. Обновление chat members
	*/

	// обновление
	if msg.ChatMember != nil {
		if msg.ChatMember.NewChatMember.User != nil {
			Log.Infof(
				"User %s %s (username = %s, id = %d) joined %s %s (%d)",
				msg.ChatMember.NewChatMember.User.FirstName,
				msg.ChatMember.NewChatMember.User.LastName,
				msg.ChatMember.NewChatMember.User.Username,
				msg.ChatMember.NewChatMember.User.ID,
				msg.ChatMember.Chat.Type,
				msg.ChatMember.Chat.Title,
				msg.ChatMember.Chat.ID,
			)
		} else {
			Log.Info(spew.Sdump(msg))
		}

		return
	}

	// новые люди (по документации)
	if msg.Message.NewChatMembers != nil {
		for _, user := range msg.Message.NewChatMembers {
			Log.Infof(
				"User %s %s (username = %s, id = %d) joined %s %s (%d)",
				user.FirstName,
				user.LastName,
				user.Username,
				user.ID,
				msg.Message.Chat.Type,
				msg.Message.Chat.Title,
				msg.Message.Chat.ID,
			)

			resp, err := Tg.SendMessage(
				"Say forty two in numbers",
				msg.ChatID(),
				&echotron.MessageOptions{
					DisableNotification: true,
					ReplyParameters: echotron.ReplyParameters{
						AllowSendingWithoutReply: false,
					},
				},
			)

			if err != nil {
				Log.Errorf("Unable to send greet for new user: %s", err)
			}

			Log.Infof(spew.Sdump(resp))
		}

		return
	}

	// Chat member leaves.
	if msg.Message.LeftChatMember != nil {
		Log.Infof(
			"User %s %s (username = %s, id = %d) left %s %s (%d)",
			msg.Message.LeftChatMember.FirstName,
			msg.Message.LeftChatMember.LastName,
			msg.Message.LeftChatMember.Username,
			msg.Message.LeftChatMember.ID,
			msg.Message.Chat.Type,
			msg.Message.Chat.Title,
			msg.Message.Chat.ID,
		)

		return
	}

	Log.Info(spew.Sdump(msg))
}