// Typescript: import { ClusterManager } from 'discord-hybrid-sharding'
const config = require("./config.json");
const blacklist = require("./data/blacklist.json");
const wfos = require("./data/wfos.json");
const events = require("./data/events.json");
const html = require("html-entities");
const { client, xml } = require("@xmpp/client");
const colors = require("colors")
const { ClusterManager } = require('discord-hybrid-sharding');
const manager = new ClusterManager(`${__dirname}/bot.js`, {
	totalShards: 2, // or numeric shard count
	/// Check below for more options
	shardsPerClusters: 1, // 2 shards per process
	//totalClusters: 2,
	mode: 'process', // you can also choose "worker"
	token: config.discord.token,
});

// func to Generate random string, ({upper, lower, number, special}, length)
// Random funcs
function toTitleCase(str) {
	return str.replace(
		/\w\S*/g,
		function (txt) {
			return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
		}
	);
}

const parseProductID = function (product_id) {
	const [timestamp, station, wmo, pil] = product_id.split("-");
	return {
		timestamp: convertDate(timestamp),
		originalTimestamp: timestamp,
		station,
		wmo,
		pil
	};
}

// Convert date format 202405080131 (YYYYMMddHHmm) to iso format, hours and mins is UTC
const convertDate = function (date) {
	const year = date.substring(0, 4);
	const month = date.substring(4, 6);
	const day = date.substring(6, 8);
	const hours = date.substring(8, 10);
	const mins = date.substring(10, 12);
	// Because they don't have seconds, assume current seconds
	const secs = new Date().getSeconds();
	return new Date(Date.UTC(year, month - 1, day, hours, mins, secs));
}

// Get number of unique channels in the database
const getUniqueChannels = function () {
	return new Promise((resolve, reject) => {
		db.all(`SELECT DISTINCT channelid FROM channels`, (err, rows) => {
			if (err) {
				console.error(err.message);
			}
			resolve(rows.length);
		});
	});
}

// Get first url in a string, return object {string, url} remove the url from the string
const getFirstURL = function (string) {
	url = string.match(/(https?:\/\/[^\s]+)/g);
	if (!url) return { string, url: null };
	const newString = string.replace(url[0], "");
	return { string: newString, url: url[0] };
}
const generateRandomString = function (options, length) {
	let result = '';
	const characters = {
		upper: 'ABCDEFGHIJKLMNOPQRSTUVWXYZ',
		lower: 'abcdefghijklmnopqrstuvwxyz',
		number: '0123456789',
		special: '!@#$%^&*()_+'
	};
	let chars = '';
	for (const key in options) {
		if (options[key]) {
			chars += characters[key];
		}
	}
	for (let i = 0; i < length; i++) {
		result += chars.charAt(Math.floor(Math.random() * chars.length));
	}
	return result;
}

// Function to get the room name from the WFO code
const getWFOroom = function (code) {
	code = code.toLowerCase();
	if (wfos[code]) {
		return wfos[code].room;
	} else {
		return code;
	}
}

// Function to get WFO data
const getWFO = function (code) {
	code = code.toLowerCase();
	if (wfos[code]) {
		return wfos[code];
	} else {
		return null;
	}
}

// Get WFO data from room name

function getWFOByRoom(room) {
	room = room.toLowerCase();
	for (const key in wfos) {
		if (wfos.hasOwnProperty(key) && wfos[key].room === room) {
			return wfos[key];
		}
	}
	return {
		location: room,
		room: room
	};
}

// Func to generate UUID
const generateUUID = function () {
	return generateRandomString({ lower: true, upper: true, number: true }, 8) + "-" + generateRandomString({ lower: true, upper: true, number: true }, 4) + "-" + generateRandomString({ lower: true, upper: true, number: true }, 4) + "-" + generateRandomString({ lower: true, upper: true, number: true }, 4) + "-" + generateRandomString({ lower: true, upper: true, number: true }, 12);
}

// Vars
var startup = true;
var iem = []
var errCount = 0;
const curUUID = generateUUID();

const xmpp = client({
	service: "xmpp://conference.weather.im",
	domain: "weather.im",
	resource: `discord-weather-bot-${generateRandomString({ upper: true, lower: true, number: true }, 5)}`, // Weird fix to "Username already in use"
});

//debug(xmpp, true);

xmpp.on("error", (err) => {
	console.log(`${colors.red("[ERROR]")} XMPP Error: ${err}. Trying to reconnect...`);
	setTimeout(() => {
		xmpp.stop().then(() => {
			start();
		});
	}, 5000);
});

xmpp.on("offline", () => {
	console.log(`${colors.yellow("[WARN]")} XMPP offline, trying to reconnect...`);
	xmpp.disconnect().then(() => {
		xmpp.stop().then(() => {
			start();
		})
	})
});

xmpp.on("stanza", (stanza) => {
	// Debug stuff
	if (config.debug >= 2) console.log(`${colors.magenta("[DEBUG]")} Stanza: ${stanza.toString()}`);


	// Handle Room List
	if (stanza.is("iq") && stanza.attrs.type === "result" && stanza.getChild("query")) {
		query = stanza.getChild("query");
		if (query.attrs.xmlns === "http://jabber.org/protocol/disco#items") {
			query.getChildren("item").forEach((item) => {
				// Check if the JID is on the blacklist, if so, ignore it
				if (blacklist.includes(item.attrs.jid)) return;
				// get proper name from wfos
				const wfo = getWFOByRoom(item.attrs.jid.split("@")[0]);
				item.attrs.properName = wfo.location;
				iem.push(item.attrs);
				manager.broadcast({type: "addChannel", data: item.attrs})
				console.log(`${colors.cyan("[INFO]")} Found room: ${item.attrs.jid}`);
				// Join the room
				//xmpp.send(xml("presence", { to: `${channel.jid}/${channel.name}/${curUUID}` }, xml("item", { role: "visitor" })));
				xmpp.send(xml("presence", { to: `${item.attrs.jid}/${curUUID}` }, xml("item", { role: "visitor" })));
			});
		}
	}
	// Get new messages and log them, ignore old messages
	if (stanza.is("message") && stanza.attrs.type === "groupchat") {
		// Stops spam from getting old messages
		if (startup) return;
		// Get channel name
		fromChannel = stanza.attrs.from.split("@")[0];
		// Ignores
		if (!stanza.getChild("x")) return; // No PID, ignore it
		if (!stanza.getChild("x").attrs.product_id) return;

		const product_id = parseProductID(stanza.getChild("x").attrs.product_id);
		const product_id_raw = stanza.getChild("x").attrs.product_id;
		// Get body of message
		const body = html.decode(stanza.getChildText("body"));
		const bodyData = getFirstURL(body);
		// get product id from "x" tag
		var evt = events[product_id.pil.substring(0, 3)];

		if (!evt) {
			evt = { name: "Unknown", priority: 3 }
			console.log(`${colors.red("[ERROR]")} Unknown event type: ${product_id.pil.substring(0, 3)}. Fix me`);
			console.log(`${colors.magenta("[DEBUG]")} ${bodyData.string}`)
		}

		evt.code = product_id.pil.substring(0, 3);
		// Check timestamp, if not within 3 minutes, ignore it
		const now = new Date();
		const diff = (now - product_id.timestamp) / 1000 / 60;
		if (diff > 3) return;
		if (config.debug >= 1) console.log(`${colors.magenta("[DEBUG]")} New message from ${fromChannel}`);


		// Handle NTFY
		if (config.ntfy.enabled) {
			if (config.debug >= 1) console.log(`${colors.magenta("[DEBUG]")} Sending NTFY for ${config.ntfy.prefix}${fromChannel}`)
			ntfyBody = {
				"topic": `${config.ntfy.prefix}${fromChannel}`,
				"message": bodyData.string,
				"tags": [`Timestamp: ${product_id.timestamp}`, `Station: ${product_id.station}`, `WMO: ${product_id.wmo}`, `PIL: ${product_id.pil}`, `Channel: ${fromChannel}`],
				"priority": evt.priority,
				"actions": [{ "action": "view", "label": "Product", "url": bodyData.url }, { "action": "view", "label": "Product Text", "url": `https://mesonet.agron.iastate.edu/api/1/nwstext/${product_id_raw}` }]
			}
			if (stanza.getChild("x").attrs.twitter_media) {
				ntfyBody.attach = stanza.getChild("x").attrs.twitter_media;
			}
			fetch(config.ntfy.server, {
				method: 'POST',
				body: JSON.stringify(ntfyBody),
				headers: {
					'Authorization': `Bearer ${config.ntfy.token}`
				}
			}).then((res) => {
				if (config.debug >= 1) console.log(`${colors.magenta("[DEBUG]")} NTFY sent for ${config.ntfy.prefix}${fromChannel} with status ${res.status} ${res.statusText}`);
				if (res.status !== 200) console.log(`${colors.red("[ERROR]")} NTFY failed for ${config.ntfy.prefix}${fromChannel} with status ${res.status} ${res.statusText}`);


			}).catch((err) => {
				console.error(err)
			})
		}
		// Handle Discord
		manager.broadcast({type: "stanza", stanza})
	}
});



xmpp.on("online", async (address) => {
	if (config["uptime-kuma"].enabled) {
		fetch(config["uptime-kuma"].url).then(() => {
			console.log(`${colors.cyan("[INFO]")} Sent heartbeat to Uptime Kuma`)
		})
		setInterval(() => {
			// Send POST request to config["uptime-kuma"].url
			fetch(config["uptime-kuma"].url).then(() => {
				console.log(`${colors.cyan("[INFO]")} Sent heartbeat to Uptime Kuma`)
			})
		}, config["uptime-kuma"].interval * 1000) // Every X seconds
	}
	errCount = 0;
	// Start listening on all channels, (dont ban me funny man)
	// for (const channel in iem) {
	// 	console.log(`Joining ${channel.name}`)
	// 	await xmpp.send(xml("presence", { to: `${channel.jud}/${channel.name}` }));
	// }
	/* sub format
	<presence to="botstalk@conference.weather.im/add9b8f1-038d-47ed-b708-6ed60075a82f" xmlns="jabber:client">
		<x xmlns="http://jabber.org/protocol/muc#user">
			<item>
				<role>visitor</role>
			</item>
		</x>
	</presence>
	*/

	// Request room list
	// Automatically find room list
	xmpp.send(xml("iq", { type: "get", to: "conference.weather.im", id: "rooms" }, xml("query", { xmlns: "http://jabber.org/protocol/disco#items" })));
	// Join all channels (Old method)
	// iem.forEach((channel => {
	// 	console.log(`${colors.cyan("[INFO]")} Joining ${channel.jid}/${channel.name}/${curUUID}`)
	// 	//xmpp.send(xml("presence", { to: `${channel.jid}/${channel.jid.split("@")[0]}` }));
	// 	xmpp.send(xml("presence", { to: `${channel.jid}/${channel.name}/${curUUID}` }, xml("item", { role: "visitor" })));
	// }))

	console.log(`${colors.cyan("[INFO]")} Connected to XMPP server as ${address.toString()}`);

	setTimeout(() => {
		startup = false;
		console.log(`${colors.cyan("[INFO]")} Startup complete, listening for messages...`);
	}, 1000)
});

xmpp.on("close", () => {
	console.log(`${colors.yellow("[WARN]")} XMPP connection closed, trying to reconnect...`);
	xmpp.disconnect().then(() => {
		xmpp.stop().then(() => {
			start();
		})
	})
})

const start = () => {
	startup = true;
	xmpp.start().catch((err) => {
		errCount++;
		if (errCount >= 5) {
			console.log(`${colors.red("[ERROR]")} XMPP failed to start after 5 attempts, exiting...`);
			process.exit(1);
		}
		console.log(`${colors.red("[ERROR]")} XMPP failed to start: ${err}.`);
		xmpp.disconnect().then(() => {
			xmpp.stop().then(() => {
				start();
			})
		})
	});
}

start();
setTimeout(() => {
	// Wait 10 seconds, if startup is still true, something went wrong
	if (startup) {
		console.log(`${colors.red("[ERROR]")} Startup failed, exiting...`);
		process.exit(1);
	}
}, 10000)

manager.spawn({ timeout: -1 });