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
}

// Add a function to extract relevant tags from the HTML content
func extractTags(html string) []string {
    var tags []string
    doc, err := goquery.NewDocumentFromReader(strings.NewReader(html))
    if err != nil {
        fmt.Println("Error parsing HTML:", err)
        return tags
    }
    // Find and extract tags with class name "news-module-feed-item-details-tag"
    doc.Find("span.news-module-feed-item-details-tag").Each(func(i int, s *goquery.Selection) {
        tag := strings.TrimSpace(s.Text())
        tags = append(tags, tag)
    })
    return tags
}

// Define a map to associate each desired tag with its corresponding Discord channel ID
var tagChannelMap = map[string]string{
    "Patch Notes":   "556093419341086749",
    "Atomic Shop":   "590581442392621067",
    "News":          "558335339018846228",
    // Add more tags and corresponding channel IDs as needed
}

func sendNotifications(session *discordgo.Session, channelID string, html string) {
    // Extract tags from the HTML content
    tags := extractTags(html)

    // Define today's date string
    today := time.Now().Format("January 2, 2006")

    // Iterate over extracted tags
    for _, tag := range tags {
        // Check if the tag is in the desired tags list
        if tagChannelID, ok := tagChannelMap[tag]; ok {
            // Check if today's date matches the tag
            if tag == today {
                // Send a message to the corresponding Discord channel
                message := fmt.Sprintf("Today's date matches the tag '%s' on the Fallout news page!", tag)
                _, err := session.ChannelMessageSend(tagChannelID, message)
                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)
            } else {
                // Send a different message indicating the tag was found
                message := fmt.Sprintf("Tag '%s' found on the Fallout news page, but it's not today's date.", tag)
                _, err := session.ChannelMessageSend(tagChannelID, message)
                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!")
    }
}