package main

import (
	"context"
	"encoding/json"
	"fmt"
	"log"
	"os"
	"strings"
	"time"

	"github.com/PuerkitoBio/goquery"
	"github.com/bwmarrin/discordgo"
	"github.com/chromedp/chromedp"
)

type Config struct {
	DiscordBotToken string            `json:"discord_bot_token"`
	ChannelMap      map[string]string `json:"channel_map"` // Add the channel map to the config
	URL             string            `json:"url"`         // Add URL field to the config
}

func main() {

	//Initialize Time
	date := "April 26, 2024"
	//date := time.Now().Format("January 2, 2006")

	// At the beginning of the main function
	log.Println("Starting the bot...")

	// Open and read the configuration file
	configFile, err := os.Open("config.json")
	if err != nil {
		fmt.Println("Error opening config file:", err)
		return
	}
	defer configFile.Close()

	// Parse the configuration from JSON
	var config Config
	err = json.NewDecoder(configFile).Decode(&config)
	if err != nil {
		fmt.Println("Error decoding config JSON:", err)
		return
	}

	// After loading the configuration
	log.Println("Loaded configuration from config.json")

	// Access the Discord bot token and channel ID from the configuration
	token := config.DiscordBotToken
	if token == "" {
		fmt.Println("Discord bot token is not set in config file")
		return
	}

	// Access the channel map from the configuration
	tagChannelMap := config.ChannelMap

	url := config.URL
	if url == "" {
		fmt.Println("URL is not set in config file")
		return
	}

	// Create a new Discord session using the provided bot token
	dg, err := discordgo.New("Bot " + token)
	if err != nil {
		fmt.Println("Error creating Discord session:", err)
		return
	}

	// After creating the Discord session
	log.Println("Created Discord session")

	// Register messageCreate as a callback for the messageCreate events
	dg.AddHandler(messageCreate)

	// Open a websocket connection to Discord and begin listening
	err = dg.Open()
	if err != nil {
		fmt.Println("Error opening Discord connection:", err)
		return
	}
	// After opening the Discord connection
	log.Println("Opened Discord connection")

	// Run the scraping and message sending function at start up
	sendNotifications(dg, fetchUrl(url), tagChannelMap, date)

	// Schedule the scraping and message sending function to run once a day
	ticker := time.NewTicker(24 * time.Hour)
	defer ticker.Stop()

	// Run the scraping and message sending function when the ticker ticks
	go func() {
		for {
			select {
			case <-ticker.C:
				sendNotifications(dg, fetchUrl(url), tagChannelMap, date)
			}
		}
	}()

	// Wait here until CTRL-C or other term signal is received
	fmt.Println("Bot is now running. Press CTRL-C to exit.")
	<-make(chan struct{})
}

func fetchUrl(url string) string {
	// Create a new context
	ctx := context.Background()
	ctx, cancel := chromedp.NewContext(
		ctx,
		chromedp.WithLogf(log.Printf),
	)
	defer cancel()

	// Navigate to the Fallout news page
	var html string
	err := chromedp.Run(ctx, chromedp.Tasks{
		chromedp.Navigate(url),
		chromedp.OuterHTML("html", &html),
	})
	if err != nil {
		log.Fatal(err)
	}

	// Return the HTML content
	return html
}

// Add a function to extract relevant tags from the HTML content
func extractNewsArticles(html string) []map[string]string {
	var articles []map[string]string

	doc, err := goquery.NewDocumentFromReader(strings.NewReader(html))
	if err != nil {
		fmt.Println("Error parsing HTML:", err)
		return articles
	}

	// Find and extract each article
	doc.Find("article.news-module-feed-item").Each(func(i int, s *goquery.Selection) {
		article := make(map[string]string)

		// Extract link
		link, exists := s.Find("a.news-module-feed-item-image").Attr("href")
		if exists {
			article["link"] = "https://fallout.bethesda.net" + link
		}

		// Extract title
		title := strings.TrimSpace(s.Find("h3.news-module-feed-item-title").Text())
		article["title"] = title

		// Extract tag
		tag := strings.TrimSpace(s.Find("span.news-module-feed-item-details-tag").Text())
		article["tag"] = tag

		// Extract date
		date := strings.TrimSpace(s.Find("span.news-module-feed-item-details-date").Text())
		article["date"] = date

		// Extract game
		game := strings.TrimSpace(s.Find("span.news-module-feed-item-details-game").Text())
		article["game"] = game

		// Extract blurb
		blurb := strings.TrimSpace(s.Find("p.news-module-feed-item-blurb").Text())
		article["blurb"] = blurb

		// Extract image URL
		imageURL, exists := s.Find("img.news-module-feed-item-image-tag").Attr("src")
		if exists {
			article["imageURL"] = "https:" + imageURL
		}

		articles = append(articles, article)
	})

	return articles
}

func sendNotifications(session *discordgo.Session, html string, tagChannelMap map[string]string, specifiedDate string) {
	// Extract articles from the HTML content
	articles := extractNewsArticles(html)

	// Iterate over extracted articles
	for _, article := range articles {
		tag := article["tag"]
		date := article["date"]
		link := article["link"]
		blurb := article["blurb"]
		title := article["title"]
		imageURL := article["imageURL"]

		// Check if the tag is in the desired tags list
		if tagChannelID, ok := tagChannelMap[tag]; ok {
			// Check if the article's date matches the specified date
			if date == specifiedDate {
				// Create a rich embed
				embed := &discordgo.MessageEmbed{
					Title:       title,
					Description: blurb,
					URL:         link,
					Image: &discordgo.MessageEmbedImage{
						URL: imageURL,
					},
					Color: 0x00ff00, // Green color for the embed
				}

				// Send a message to the corresponding Discord channel
				message := "New <@&568064042086694913> have been released!"
				_, err := session.ChannelMessageSendComplex(tagChannelID, &discordgo.MessageSend{
					Content:         message, // Replace 568064042086694913 with the ID of the role to mention
					Embed:           embed,
					AllowedMentions: &discordgo.MessageAllowedMentions{Roles: []string{"568064042086694913"}}, // Replace ROLE_ID with the ID of the role to mention
				})
				if err != nil {
					fmt.Printf("Error sending message to Discord channel %s: %s\n", tagChannelID, err)
					continue
				}
				fmt.Println("Message sent to Discord channel:", tagChannelID)
			}
		}
	}
}

// This function will be called whenever a new message is created
func messageCreate(s *discordgo.Session, m *discordgo.MessageCreate) {
	// Ignore messages created by the bot itself
	if m.Author.ID == s.State.User.ID {
		return
	}

	// If the message content is "!hello", respond with "Hello!"
	if m.Content == "!hello" {
		_, _ = s.ChannelMessageSend(m.ChannelID, "Hello!")
	}
}