import Pushy from "pushy-electron";
import { readSessionData } from "./auth";
import { post } from "./v1-client";
import * as log from "electron-log";
import { Notification, BrowserWindow } from "electron";
import { nameToSlug } from "./package";
import {
	getInstalledPackages,
	getPackagesInstalledList,
	updatePackageInstalledList,
	getGuiPath
} from "./tea-dir";
import { app } from "electron";
import { promisify } from "util";
import fs from "fs";
import path from "path";

import * as config from "../config.json";

const readFile = promisify(fs.readFile);
const writeFile = promisify(fs.writeFile);

export default function initialize(mainWindow: BrowserWindow) {
	if (config.PUSHY_APP_ID) {
		Pushy.listen();
		// Register device for push notifications
		Pushy.register({ appId: process.env.PUSHY_APP_ID })
			.then(async (push_token) => {
				const { device_id } = await readSessionData();
				log.info(
					`Registering device ${device_id} for push notifications with token: ${push_token}`
				);
				if (device_id) await post(`/auth/device/${device_id}/register-push-token`, { push_token });
			})
			.catch((err) => {
				log.error(err);
				// Display error dialog
				// Pushy.alert(mainWindow, 'Pushy registration error: ' + err.message);
			});

		// Listen for incoming notifications
		Pushy.setNotificationListener(async (data: any) => {
			try {
				log.info("new notification received", data);

				const isDup = await wasReceivedBefore(data);
				if (!isDup) {
					new Notification({
						title: "tea",
						body: data?.message as string
					}).show();

					const v = app.dock.getBadge();
					if (!v) {
						app.dock.setBadge("1");
					} else {
						app.dock.setBadge((parseInt(v) + 1).toString());
					}
				} else {
					log.info("notification was already received before", data);
				}
			} catch (error) {
				log.error("notification listener", error);
			}
		});
	}
}

export async function subscribeToPackageTopic(pkgFullname: string) {
	try {
		if (Pushy.isRegistered()) {
			const slug = nameToSlug(pkgFullname);

			// override rules for brewkit_mnt
			if (slug.includes("brewkit_mnt")) return;

			const platformArch = getTopicArch();
			const topic = `packages-${slug}_${platformArch}`;

			await Pushy.subscribe(topic);
			log.info("push: registered to pkg-topic: ", topic);
		} else {
			log.info("pushy is not registered");
		}
	} catch (error) {
		log.error(error);
	}
}

export async function unsubscribeToPackageTopic(pkgFullname: string) {
	try {
		if (Pushy.isRegistered()) {
			const slug = nameToSlug(pkgFullname);
			const topic = `packages-${slug}`;
			await Pushy.unsubscribe(topic);
			log.info("push: unregistered from pkg-topic: ", topic);
		} else {
			log.info("pushy is not registered");
		}
	} catch (error) {
		log.error(error);
	}
}

export async function syncPackageTopicSubscriptions() {
	try {
		log.info("syncing package topic subscriptions");
		const [installedPackages, lastInstalledList] = await Promise.all([
			getInstalledPackages(),
			getPackagesInstalledList()
		]);

		const previouslyInstalledNames = lastInstalledList.map((pkg) => pkg.full_name);
		const currentlyInstalledNames = installedPackages.map((pkg) => pkg.full_name);

		const subscribedTo = currentlyInstalledNames.filter(
			(pkg) => !previouslyInstalledNames.includes(pkg)
		);
		const unsubscribedFrom = previouslyInstalledNames.filter(
			(pkg) => !currentlyInstalledNames.includes(pkg)
		);

		for (const subscribe of subscribedTo) {
			await subscribeToPackageTopic(subscribe);
		}
		for (const unsubscribe of unsubscribedFrom) {
			await unsubscribeToPackageTopic(unsubscribe);
		}

		await updatePackageInstalledList(installedPackages);
	} catch (error) {
		log.error(error);
	}
}

enum PlatformArch {
	DarwinAarch64 = "darwin_aarch64",
	DarwinX86_64 = "darwin_x86-64",
	LinuxAarch64 = "linux_aarch64",
	LinuxX86_64 = "linux_x86-64"
}

export function getTopicArch() {
	const arch = (process.arch as string) === "arm64" ? "aarch64" : "x86-64";
	const platform = process.platform === "darwin" ? "darwin" : "linux";
	return `${platform}_${arch}` as PlatformArch;
}

async function wasReceivedBefore({
	url,
	version
}: {
	url: string;
	version: string;
}): Promise<boolean> {
	if (!url || !version) return false;

	let received = false;
	const pkg = url.replace("tea://packages/", "");
	const searchString = `${pkg}:::${version}`;
	const notificationPath = path.join(getGuiPath(), "notifications");
	try {
		const fileContent = await readFile(notificationPath, "utf-8");

		if (fileContent.includes(searchString)) {
			log.info("user has already been notified before of ", searchString);
			received = true;
		} else {
			const appendString = fileContent ? `\n${searchString}` : searchString;
			await writeFile(notificationPath, fileContent + appendString, "utf-8");
		}
	} catch (error) {
		if (error.code === "ENOENT") {
			// If the file does not exist, create the file and write the string
			await writeFile(notificationPath, searchString, "utf-8");
			log.info("notification file created with the ", searchString);
		} else {
			log.error("Error processing the file:", error);
		}
	}
	return received;
}