import sirv from "sirv";
import polka from "polka";
import compression from "compression";
import * as sapper from "@sapper/server";

import arangojs, { Database, aql } from "arangojs";
import { hash } from "bcrypt";
import { log } from "./logger";
import { Permissions } from "./lib/permissions";
import { stringify } from "json-bigint";

// HACK : BigInt support on JSON.stringify
JSON.stringify = stringify;

export let profileNameCache: {
	[player: string]: {
		[profile: string]: string;
	};
} = {};

export const {
	PORT,
	NODE_ENV,
	DB_USERNAME,
	DB_PASSWORD,
	DB_URL,
	DB_NAME,
	API_KEY
} = process.env;
const dev = NODE_ENV === "development";
export const db = arangojs({
	auth: {
		username: DB_USERNAME || "root",
		password: DB_PASSWORD
	},
	url: DB_URL || "http://127.0.0.1:8529",
	databaseName: DB_NAME || "sbdatatracker"
});
export const saltRounds = 9;
export const accessTokenExpire = 1000 * 60 * 20;
export const refreshTokenExpire = 1000 * 60 * 60 * 24 * 7;
const delay = 3 * 60 * 1000;

const intervalFunc = async (db: Database) => {
	const cnf = db.collection("config");
	const users = db.collection("users");
	const sessions = db.collection("sessions");
	if (!(await cnf.exists())) {
		await cnf.create({
			schema: {
				rule: {
					properties: {
						type: { type: "string" },
						data: { type: "object" }
					},
					required: ["type", "data"]
				}
			}
		});
	}
	if (!(await users.exists())) {
		await users.create({
			schema: {
				rule: {
					properties: {
						username: { type: "string" },
						password: { type: "string" },
						permissions: {
							type: "array",
							items: { type: "string" }
						}
					},
					required: ["username", "permissions"]
				}
			}
		});
		await users.save({
			username: DB_USERNAME || "root",
			password: await hash(DB_PASSWORD || "SBDataTracker", saltRounds),
			permissions: [Permissions.ALL]
		});
		await users.save({
			username: "_guest",
			permissions: [Permissions.VIEW_PROFILES]
		});
	}
	if (!(await sessions.exists())) {
		await sessions.create({
			schema: {
				rule: {
					properties: {
						token: { type: "string" },
						exp: { type: "number" },
						type: { type: "string" },
						user: { type: "string" }
					},
					required: ["token", "exp", "type", "user"]
				}
			}
		});
	}

	// Delete expired sessions
	const now = Date.now();
	await db.query(aql`
		FOR doc in ${sessions}
			FILTER doc.exp <= ${now}
			REMOVE doc in ${sessions}
	`);

	const cursor = await db.query(
		aql`
			FOR doc IN ${cnf}
				FILTER doc.type == "tracker"
				RETURN { _key: doc._key } 
		`,
		{
			count: true
		}
	);
	/*
		Instead of running a loop on all trackers at once,
		they are spread out evenly across the delay which
		lowers the chance of exceeding the Hypixel rate-limit
		when there are a lot of trackers.

		TODO : Add a hard-stop if the rate-limit is about
		to be exceeded.
		*/
	if (cursor.hasNext) {
		let counter = 0;
		let interval: NodeJS.Timeout;
		const iterate = async () => {
			try {
				if (++counter >= cursor.count!) clearInterval(interval);

				const { _key: profile } = await cursor.next();
				if (profile) {
					const col = db.collection(`c${profile}`);
					if (!(await col.exists())) col.create();
					console.log(`${new Date()}\tLogging '${profile}'`);
					await col.save(await log(API_KEY || "", profile));
				} else {
					console.warn(
						`Configuration entry '${profile}' with type 'tracker' has no "profile" value`
					);
				}
			} catch (e) {
				console.error(e);
			}
		};
		// Separated into setInterval and a setTimeout so when the script is started,
		// immediately at least one profile is logged. This is useful for debugging
		// since you don't have to wait for up to 3 minutes to pass.
		if (cursor.count! > 1)
			interval = setInterval(iterate, delay / (cursor.count! - 1));
		setTimeout(iterate);
	}
};

setInterval(intervalFunc, delay, db);
setTimeout(intervalFunc, 0, db);

polka({
	onError: err => {
		if (err) console.log("Error", err);
	}
})
	.use(
		compression({ threshold: 0 }),
		sirv("static", { dev }),
		sapper.middleware()
	)
	.listen(PORT);