package main

import (
	"context"
	"errors"
	"fmt"
	"io"
	"log"
	"math/rand"
	"net/http"
	"os"
	"strings"
	"time"

	"github.com/kosa3/pexels-go"
	"github.com/mattn/go-mastodon"
	"github.com/spf13/viper"
)

func main() {
	architectureBot()
}

func architectureBot() {
	viper.AddConfigPath(".")
	viper.AddConfigPath("..")
	viper.SetConfigName("architectureBot") // name of config file (without extension)
	viper.SetConfigType("yaml")            // REQUIRED if the config file does not have the extension in the name
	err := viper.ReadInConfig()            // Find and read the config file
	if err != nil {                        // Handle errors reading the config file
		panic(fmt.Errorf("fatal error config file: %w", err))
	}

	type fedi struct {
		clientID     string
		clientSecret string
		email        string
		password     string
	}

	rand.Seed(time.Now().UnixNano())

	queryArr := viper.GetStringSlice("queries")
	queryArrLen := len(queryArr)
	queryIndex := rand.Int31n(int32(queryArrLen))
	query := queryArr[queryIndex]

	cli := pexels.NewClient(viper.GetString("PexelsAPIKey"))
	ps, err := cli.PhotoService.Search(context.Background(), &pexels.PhotoParams{
		Query:   query,
		PerPage: 80,
	})
	if err != nil {
		log.Fatal(err)
	}
	ps.Page = rand.Intn(100)
	photoIndex := rand.Intn(79)
	photo := ps.Photos[photoIndex]

	hashtagString := "#"
	hashtagArr := strings.Split(query, " ")
	for _, v := range hashtagArr {
		hashtagString += v
	}
	fmt.Println(hashtagString)
	// fmt.Println("Source Medium URL:", ps.Photos[0].Src.Medium)
	photoURL := photo.Src.Original
	mime := strings.Split(photoURL, "/")
	name := mime[len(mime)-1]
	fileName := "images/" + fmt.Sprint(name)
	os.Mkdir("images", 0700)
	err = downloadFile(photoURL, fileName)
	if err != nil {
		log.Fatal(err)
	}

	// fmt.Println("Original SRC URL: ", photoURL)

	post := "Taken from " + photo.URL + "\n" + hashtagString

	domain := "https://" + viper.GetString("domain")
	if !viper.IsSet("NCD.ClientID") {

		app, err := mastodon.RegisterApp(context.Background(), &mastodon.AppConfig{
			Server:     domain,
			ClientName: viper.GetString("botName"),
			Scopes:     "read write follow",
		})

		if err != nil {
			log.Fatal(err)
		}

		viper.Set("NCD.ClientID", app.ClientID)
		viper.Set("NCD.ClientSecret", app.ClientSecret)
		viper.WriteConfig()
	}
	ncdConfig := fedi{
		clientID:     viper.GetString("NCD.ClientID"),
		clientSecret: viper.GetString("NCD.ClientSecret"),
		email:        viper.GetString("NCD.Email"),
		password:     viper.GetString("NCD.password"),
	}

	c := mastodon.NewClient(&mastodon.Config{
		Server:       domain,
		ClientID:     ncdConfig.clientID,
		ClientSecret: ncdConfig.clientSecret,
	})

	err2 := c.Authenticate(context.Background(), ncdConfig.email, ncdConfig.password)
	if err2 != nil {
		log.Fatal(err)
	}

	attachment, err4 := c.UploadMedia(context.Background(), fileName)
	if err4 != nil {
		fmt.Println(err4)
	}
	var attachmentArr []mastodon.ID
	attachmentArr = append(attachmentArr, attachment.ID)
	status := &mastodon.Toot{
		Status:   post,
		MediaIDs: attachmentArr,
	}
	c.PostStatus(context.Background(), status)
}

func downloadFile(URL, fileName string) error {
	//Get the response bytes from the url
	response, err := http.Get(URL)
	if err != nil {
		return err
	}
	defer response.Body.Close()

	if response.StatusCode != 200 {
		return errors.New("received non 200 response code")
	}
	//Create a empty file
	file, err := os.Create(fileName)
	if err != nil {
		return err
	}
	defer file.Close()

	//Write the bytes to the fiel
	_, err = io.Copy(file, response.Body)
	if err != nil {
		return err
	}

	return nil
}