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// SPDX-FileCopyrightText: 2024 Shota FUJI <pockawoooh@gmail.com>
// SPDX-License-Identifier: AGPL-3.0-only

import { createClient } from "@connectrpc/connect";
import { createConnectTransport } from "@connectrpc/connect-web";
import { MetaService } from "@yamori/proto/yamori/meta/v1/meta_service_pb.js";
import { WorkspaceService } from "@yamori/proto/yamori/workspace/v2/workspace_service_pb.js";
import {
	ProtoRPCProvider,
	type ProtoRPC,
	ThemeProvider,
	ThirdPartyNoticeProvider,
	HistoryAPIRouterProvider,
	Page,
} from "@yamori/react_ui";
import { createRoot } from "react-dom/client";

import css from "./main.module.css";
import { Message, isValidMessage } from "./worker/message.ts";

async function readThirdPartyNotice() {
	const resp = await fetch("/third-party.txt");

	return resp.text();
}

const worker = new Worker(new URL("./worker/main.ts", import.meta.url), {
	type: "module",
});

const root = createRoot(document.body);

worker.addEventListener("message", (event) => {
	if (event.data !== "ready") {
		return;
	}

	const rpc: ProtoRPC = {
		send(service, method, data) {
			const id = crypto.randomUUID();

			return new Promise((resolve) => {
				const onMessage = (event: MessageEvent) => {
					if (!isValidMessage(event.data) || event.data.id !== id) {
						return;
					}

					resolve(event.data.data);
					worker.removeEventListener("message", onMessage);
				};

				worker.addEventListener("message", onMessage);

				worker.postMessage({
					id,
					service,
					method,
					data,
				} satisfies Message);
			});
		},
	};

	root.render(
		<ThirdPartyNoticeProvider text={readThirdPartyNotice}>
			<HistoryAPIRouterProvider>
				<ProtoRPCProvider rpc={rpc}>
					<ThemeProvider className={css.theme}>
						<Page />
					</ThemeProvider>
				</ProtoRPCProvider>
			</HistoryAPIRouterProvider>
		</ThirdPartyNoticeProvider>,
	);
});

const backend = new Worker(new URL("./worker/backend.ts", import.meta.url), {
	type: "module",
});

const http = createConnectTransport({
	baseUrl: "/api",
});

const transport = createConnectTransport({
	baseUrl: "/",
	useBinaryFormat: true,
	fetch(request, opts) {
		const id = crypto.randomUUID();

		backend.postMessage(
			{
				id,
				input: request,
				options: {
					headers: Object.fromEntries(new Headers(opts?.headers).entries()),
					method: opts?.method,
					body: opts?.body,
				},
			},
			{
				transfer: [(opts?.body as Uint8Array).buffer],
			},
		);

		return new Promise((resolve) => {
			const handler = (event: MessageEvent) => {
				if (event.data.id !== id) {
					return;
				}

				const body = event.data.body as ArrayBuffer;
				const headers = event.data.headers as Record<string, string>;
				console.log(event.data);

				resolve(new Response(body, { headers }));

				backend.removeEventListener("message", handler);
			};

			backend.addEventListener("message", handler);
		});
	},
});

const client = createClient(MetaService, transport);

client.ping({}).then((pong) => {
	console.log(pong);
});

const workspace = createClient(WorkspaceService, http);
workspace
	.login({
		name: "Alice",
		password: "Alice",
	})
	.then((res) => {
		console.log(res);
	});