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"`
    DiscordChannelID string `json:"discord_channel_id"`    // Add more configuration fields here
}

func main() {

    // 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
    }

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

    //
    channelID := config.DiscordChannelID
    if channelID == "" {
        fmt.Println("Discord channel ID is not set in config file")
    }

    // 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
    }

    // 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
    }
    
    // Run the scraping and message sending function once at the specified time
	sendNotifications(dg, channelID, scrapeNews())

    // 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, channelID, scrapeNews())
            }
        }
    }()

    //test()

    // 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 scrapeNews() 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("https://fallout.bethesda.net/en/news"),
		chromedp.OuterHTML("html", &html),
	})
	if err != nil {
		log.Fatal(err)
	}

	// Return the HTML content
	return html
}

// Function to scrape the webpage and send a message if the date matches
func sendNotifications(session *discordgo.Session, channelID string, html string) {
	// Parse the HTML content
	doc, err := goquery.NewDocumentFromReader(strings.NewReader(html))
	if err != nil {
		fmt.Println("Error parsing HTML:", err)
		return
	}

	// Find and extract the date from the webpage
	var foundDate bool
	doc.Find("span.news-module-feed-item-details-date").Each(func(i int, s *goquery.Selection) {
		dateString := strings.TrimSpace(s.Text())
		fmt.Println("Found date:", dateString)
		if dateString == time.Now().Format("January 2, 2006") {
			foundDate = true
		}
	})

	// If today's date was found on the webpage, send a message to the Discord channel
	if foundDate {
		_, err := session.ChannelMessageSend(channelID, "Today's date was found on the Fallout news page!")
		if err != nil {
			fmt.Println("Error sending message to Discord:", err)
			return
		}
		fmt.Println("Message sent to Discord channel")
	} else {
		fmt.Println("Today's date not found on the Fallout news page")
	}
}

// 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!")
    }
}