package main

import (
	"io"
	"net/http"
	"os"
	"regexp"
	"strings"
	"time"

	tgbotapi "git.zio.sh/astra/telegram-bot-api"
	"github.com/astravexton/logger"
	"github.com/dghubble/sling"
	"github.com/google/uuid"
)

const ddgURL = "https://duckduckgo.com"

// ImgResult ...
type ImgResult struct {
	Ads          interface{} `json:"ads"`
	Next         string      `json:"next"`
	Query        string      `json:"query"`
	QueryEncoded string      `json:"queryEncoded"`
	ResponseType string      `json:"response_type"`
	Results      []Results   `json:"results"`
	Vqd          struct {
		Testing string `json:"testing"`
	} `json:"vqd"`
}

type Results struct {
	Height    int    `json:"height"`
	Image     string `json:"image"`
	Source    string `json:"source"`
	Thumbnail string `json:"thumbnail"`
	Title     string `json:"title"`
	URL       string `json:"url"`
	Width     int    `json:"width"`
}

type Params struct {
	Query string `url:"q,omitempty"`
	L     string `url:"l,omitempty"`
	O     string `url:"o,omitempty"`
	Q     string `url:"q,omitempty"`
	VQD   string `url:"vqd,omitempty"`
	F     string `url:"f,omitempty"`
	P     string `url:"p,omitempty"`
	S     string `url:"s,omitempty"`
	U     string `url:"u,omitempty"`
}

func main() {
	logger.Layout = time.Stamp
	logger.BitwiseLevel = logger.LogInfo | logger.LogWarning | logger.LogCritical
	bot, err := tgbotapi.NewBotAPI(os.Getenv("BOT_TOKEN"))
	if err != nil {
		logger.Critical(err.Error())
	}
	me, err := bot.GetMe()
	if err != nil {
		logger.Critical(err.Error())
	}
	logger.Info("Authorized as %s", me.UserName)

	u := tgbotapi.NewUpdate(0)
	u.Timeout = 60
	updates := bot.GetUpdatesChan(u)

	for update := range updates {
		if update.InlineQuery != nil {
			if update.InlineQuery.Query != "" {
				logger.Debug("Inline query %q from %s", update.InlineQuery.Query, update.InlineQuery.From)
				var results []interface{}

				images := getImageList(update.InlineQuery.Query)
				for c, image := range images {
					if c == 50 {
						break
					}
					result := &tgbotapi.InlineQueryResultPhoto{
						Type:     "photo",
						ID:       uuid.New().String(),
						URL:      image.Image,
						ThumbURL: image.Thumbnail,
					}
					results = append(results, result)
				}
				inlineConf := tgbotapi.InlineConfig{
					InlineQueryID: update.InlineQuery.ID,
					IsPersonal:    false,
					CacheTime:     1,
					Results:       results,
				}
				bot.Request(inlineConf)
			}
		}
	}

}
func getImageList(query string) []Results {
	safeSearch := "-1" // -1 = safe off, 1 = safe on
	if len(query) >= 8 {
		if strings.HasPrefix(query, "safe:on") {
			safeSearch = "1"
			query = query[8:]
		}
	}
	params := &Params{Query: query}
	s := sling.New().Get(ddgURL)
	s.Set("User-Agent", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36")
	s.QueryStruct(params)

	req, err := s.Request()
	if err != nil {
		logger.Critical(err.Error())
	}

	client := &http.Client{}
	client.Timeout = time.Second * 3

	res, err := client.Do(req)
	if err != nil {
		logger.Critical(err.Error())
	}

	defer res.Body.Close()

	body, _ := io.ReadAll(res.Body)
	bodyContents := string(body)

	r := regexp.MustCompile(`vqd=([\d-]+)`)
	token := strings.ReplaceAll(r.FindString(bodyContents), "vqd=", "")

	params = &Params{
		L:   "us-en",
		O:   "json",
		Q:   query,
		VQD: token,
		F:   ",,,,,",
		P:   safeSearch,
		S:   "0",
		U:   "bing",
	}
	s = s.Get(ddgURL).Path("/i.js").QueryStruct(params)
	s.Set("Authority", "duckduckgo.com")
	s.Set("Accept", "application/json, text/javascript, */*; q=0.01")
	s.Set("Cookie", "bc=1; at=-1; au=-1; av=1; ax=-1; ak=-1; ao=-1; ap=-1; 1=-1; 5=1; aq=-1; ay=b; ah=uk-en; l=wt-wt; p=-2")
	s.Set("Referer", "https://duckduckgo.com/")

	imageList := &ImgResult{}
	_, err = s.ReceiveSuccess(imageList)
	if err != nil {
		logger.Critical(err.Error())
	}

	return imageList.Results
}