const fs = require('fs')
const axios = require('axios')
const mineflayer = require('mineflayer')
const { EventEmitter } = require('events')
const { EmbedBuilder, hyperlink, WebhookClient } = require('discord.js');
const { registerFont, createCanvas } = require('canvas');


function stripChatColors(txt) {
    const formattingRegex = /§[0-9a-fklmnor]+|[\[\]:]+/g;
    return txt.replace(formattingRegex, '');
}


class GuildMessageSender {
	constructor(rawUsername, rawHypixelRank, rawGuildRank) {
		this.rawUsername = rawUsername
		this.rawHypixelRank = rawHypixelRank
		this.rawGuildRank = rawGuildRank
	}

	getCleanUsername() { return stripChatColors(this.rawUsername) }
	getCleanHypixelRank() { return stripChatColors(this.rawHypixelRank) }
	getCleanGuildRank() { return stripChatColors(this.rawGuildRank) }
}

class GuildMessage {
	constructor(message, sender) {
		this.message = message
		this.sender = sender
	}
}

class OfficerMessage {
	constructor(message, sender) {
		this.message = message
		this.sender = sender
	}
}

function parseGuildMessage(jsonMsg) {
	const message_details = jsonMsg.json.extra
	let message_prefix = message_details[0].text

	let hypixel_rank = null
	let username = null
	let guild_rank = null

	let eventType = 'null'
	let sender_contents = null
	if (message_prefix.includes('§2Guild >')) { eventType = 'guildmsg'; sender_contents = message_prefix.replace('§2Guild >', '') }
	else if (message_prefix.includes('§3Officer >')) { eventType = 'officermsg'; sender_contents = message_prefix.replace('§3Officer >', '')  }
	let message_arr = sender_contents.trim().split(' ')

	// Parse guild member details (with hypixel rank)
	if (message_arr[0].includes('[')) { hypixel_rank = message_arr[0]; username = message_arr[1]; guild_rank = message_arr[2].replace(':', '') }
	// Parse guild member details (nons)
	else { hypixel_rank = ''; username = message_arr[0]; guild_rank = message_arr[1].replace(':', '') }
	
	// Skip messages sent by the bot
	if (stripChatColors(username) === bot.username) { return }

	const sender = new GuildMessageSender(username, hypixel_rank, guild_rank)
	let guildMessage = null
	if (eventType === 'guildmsg') { guildMessage = new GuildMessage(message_details[1].text, sender) }
	else if (eventType === 'officermsg') { guildMessage = new OfficerMessage(message_details[1].text, sender) }
	else { console.error('Error parsing guild message: unknown event type'); return }

	// Emit GuildMessage event
	chatEvents.emit(eventType, guildMessage)
}

async function sendWebhookMessage(guildMsg) {
	const canvas = createCanvas(800, 200)
	const context = canvas.getContext('2d')

	// Fill background
	context.fillStyle = '#313338'
	context.fillRect(0, 0, canvas.width, canvas.height)
	context.font = '24px minecraft'

	const username = guildMsg.sender.rawUsername
	const hypixelRank = guildMsg.sender.rawHypixelRank
	const guildRank = guildMsg.sender.rawGuildRank
	const message = guildMsg.message

	let x = 10
	let y = 50

    // Draw text with colors
    context.fillStyle = '#FFAA00' // Example color, modify as needed
    context.fillText(hypixelRank, x, y)
    x += context.measureText(hypixelRank).width + 10

    context.fillStyle = '#55FF55' // Example color, modify as needed
    context.fillText(username, x, y)
    x += context.measureText(username).width + 10

    context.fillStyle = '#AAAAFF' // Example color, modify as needed
    context.fillText(guildRank, x, y)
    x += context.measureText(guildRank).width + 10

    context.fillStyle = '#FFFFFF' // Example color, modify as needed
    context.fillText(message, x, y)

    // Convert canvas to buffer
    const buffer = canvas.toBuffer('image/png')

    // Send image to Discord webhook
    const form = new FormData()
    form.append('file', new Blob([Buffer.from(buffer)]), 'message.png')

    await axios.post(webhookUrl, form, {})
}

class ProudCircleBot {
	constructor(username) {
		this.username = username
		this.auth = 'microsoft'
		this.host = 'play.hypixel.net'
		this.version = '1.8.9'
		this.shouldReconnect = true
		
		this.initBot()
	}


	initBot() {
		this.bot = mineflayer.createBot({
			"username": this.username,
			"auth": 'microsoft',
			"host": 'play.hypixel.net',
			"version": this.version
		})

		this.initEvents()
		this.bot.emit('startup')

		this.listenToUserInput()
	}

	listenToUserInput() {}

	initEvents() {
		// Bot Startup
		this.bot.on('startup', async () => { console.log('Starting bot...') })

		// Server login
		this.bot.on('login', async () => {
			let sock = this.bot._client.socket
			console.log(`Logged into ${sock.server ? sock.server : sock._host}`)
		})

		// Disconnect from server
		this.bot.on('end', async (cause) => {
			console.log(`Disconnected from server: ${cause}`)
			if (reason === 'disconnect.quitting') { return }
			else { console.error('Unknown cause of disconnecting!') }
			
			// Auto Reconnect
			if (this.shouldReconnect) {
				console.log('Attempting to reconnect...')
				setTimeout(() => this.initBot(), 5000)
			}
		})

		// Chat Message
		this.bot.on('message', async (jsonMsg, position) => {
			// Avoid hypixel cancer
			if (jsonMsg['extra'] && jsonMsg['extra'].length === 100) { return }

			let rawText = jsonMsg.toString()
			if (rawText === "Woah there, slow down!") { console.error("Server issued message spam warning") }
			if (!jsonMsg?.json?.extra || jsonMsg.json.extra.length === 0 || !jsonMsg.json.extra[0]) { return }

			// Check for guild messages
			// Guild/Officer chat/member join/member leave
			let extra_prefix = jsonMsg.json.extra[0].text
			if (extra_prefix.startsWith('§2Guild >') || extra_prefix.startsWith('§3Officer >')) {
				parseGuildMessage(jsonMsg)
			}
		})


		// Custom Guild Message Event
		chatEvents.on('guildmsg', async (guildMsg) => {
			console.log(`Guild: ${guildMsg.sender.getCleanUsername()} ${guildMsg.message}`)
			await sendWebhookMessage(guildMsg)
		})


		// Custom Officer Message Event
		chatEvents.on('officermsg', (officerMsg) => {
			console.log(`Officer: ${officerMsg.sender.getCleanUsername()} ${officerMsg.message}`)
		})
	}
}

registerFont('fonts/Minecraftia-Regular.ttf', {family: 'Minecraft'})

const webhookUrl = 'https://discord.com/api/webhooks/1262482329671176232/yAHgxkP2JSBPpdjmz6mdABu5yRkXxatXcbzI91iAjy0jM0z1kRzE1HZqzK5OGXCmkqPk'
const webhookClient = new WebhookClient({ url: webhookUrl });

const chatEvents = new EventEmitter()
const bot = new ProudCircleBot('ProudCircle')