package main

import (
	"regexp"
	"strings"

	"github.com/samber/lo"
	tele "gopkg.in/telebot.v3"

	"git.gensokyo.cafe/kkyy/tgbot_misaka_5882f7/openai"
	"git.gensokyo.cafe/kkyy/tgbot_misaka_5882f7/openai/prompts"
)

var (
	translateMenu = &tele.ReplyMarkup{}

	translateBtnZhTw = translateMenu.Data("繁中", "btn_tr_zhtw", "Taiwanese Chinese")
	translateBtnZhCn = translateMenu.Data("简中", "btn_tr_zhcn", "Mandarin Chinese")
	translateBtnEn   = translateMenu.Data("English", "btn_tr_en", "English")
	translateBtnJa   = translateMenu.Data("日本語", "btn_tr_ja", "Japanese")

	translateBtnRetry = translateMenu.Data("🔄 Try again", "btn_tr_retry")

	translateBtns = []*tele.Btn{
		&translateBtnZhTw, &translateBtnZhCn, &translateBtnEn, &translateBtnJa,
		&translateBtnRetry,
	}

	translateCmdRe = regexp.MustCompile(`^\s*\/tr(anslate)?(@\S*)?\s*`)
)

func init() {
	translateMenu.Inline(
		translateMenu.Row(translateBtnZhTw, translateBtnZhCn),
		translateMenu.Row(translateBtnEn, translateBtnJa),
	)
}

func handleTranslateCmd(c tele.Context) error {
	msg := c.Message()
	if msg == nil {
		return nil
	}
	if msg.ReplyTo != nil {
		msg = msg.ReplyTo
	}

	payload := strings.TrimSpace(translateCmdRe.ReplaceAllString(msg.Text, ""))
	if payload == "" {
		return c.Reply("Usage: `/tr <text>`",
			&tele.SendOptions{ParseMode: tele.ModeMarkdown},
			tele.Silent,
		)
	}

	_, err := c.Bot().Reply(msg, "Sure. To what language?", tele.Silent, translateMenu)
	return err
}

func handleTranslateBtn(c tele.Context) error {
	msg := c.Message()
	if msg == nil || msg.ReplyTo == nil {
		return nil
	}
	origMsg := msg.ReplyTo
	targetLang := c.Data()
	txt := origMsg.Text
	payload := strings.TrimSpace(translateCmdRe.ReplaceAllString(txt, ""))

	if targetLang == "" || payload == "" {
		return nil
	}

	req := openai.ChatRequest{
		Model: openai.ModelGpt0305Turbo,
		Messages: []openai.ChatMessage{
			{
				Role:    openai.ChatRoleSystem,
				Content: prompts.Translate(targetLang),
			},
			{
				Role:    openai.ChatRoleUser,
				Content: payload,
			},
		},
		Temperature: lo.ToPtr(0.2),
	}

	actionCh := setTyping(c)
	err := assistantStreamedResponse(req, func(text string, finished bool) error {
		var err error
		<-actionCh
		if finished {
			retryBtn := translateBtnRetry
			retryBtn.Data = targetLang
			respMenu := &tele.ReplyMarkup{}
			respMenu.Inline(respMenu.Row(retryBtn))

			msg, err = c.Bot().Edit(msg, text, respMenu)
		} else {
			msg, err = c.Bot().Edit(msg, text)
		}
		return err
	})
	if err != nil {
		logger.Errorf("failed to translate: req: %#+v, err: %v", req, err)
		_, _ = c.Bot().Reply(origMsg, stickerFromID(stickerPanic), tele.Silent)
		return err
	}
	return nil
}