/// <reference types="node" />
import readline from 'node:readline';

import { PrivateKey } from '@xo-cash/primitives';

import type { BaseSyncClient } from '../source/shared/base-client.js';

import { SSEClient } from '../source/sse/client.js';
import { EncryptedClientPerResource } from './experimental/encrypted-client-per-resource.js';

const privateKey = PrivateKey.fromString('c440ce6ac5b63ae7bc4af9891b80b7a88ccdeebba5e43246885e9ec56f912ac2');

// Define some formatting helpers
const formatResourceId = (resourceId: string) => {
    return `\x1b[32m${resourceId}\x1b[0m`;
};

const formatMessage = (message: string) => {
    return `\x1b[34m${message}\x1b[0m`;
};

const resetFormatting = () => {
    return '\x1b[0m';
};

// readline lets us get both whole lines and individual keypresses (for Escape)
// escapeCodeTimeout: how long to wait after Escape to see if it's part of a key sequence (default 500ms)
const rl = readline.createInterface({ input: process.stdin, output: process.stdout, escapeCodeTimeout: 0 });

const startTUI = async (client: BaseSyncClient<string>) => {
    // Listen and log out the resource change
    client.on('resource-instance-updated', (message) => {
        // Print the message with colours
        console.log(
            `${formatResourceId(message.resourceId)}:${formatResourceId(message.publicKey)} updated: ${formatMessage(message.value)}${resetFormatting()}`,
        );
    });

    // Connect to the sync server and subscribe to the resource
    await client.connect();

    const writeResourceLoop = async (resourceId: string) => {
        while (true) {
            // Print the prompt
            process.stdout.write('> ');

            // Wait for the user to enter a command
            // Resolves with the typed line, or null if Escape was pressed
            const onKeypress = (_char: string, key: readline.Key) => key?.name === 'escape' && rl.emit('line', null);
            process.stdin.on('keypress', onKeypress);
            const line = await new Promise<string | null>((resolve) => rl.once('line', resolve));
            process.stdin.off('keypress', onKeypress);

            // Escape exits the loop
            if (line === null) return;

            if (line.trim()) {
                await client.write(resourceId, line.trim());
            }
        }
    };

    const selectResource = async () => {
        while (true) {
            console.log('Enter a resource:');

            // Print the prompt
            process.stdout.write('> ');

            // Wait for the user to enter a command
            const line = await new Promise<string>((resolve) => rl.once('line', resolve));
            const resourceId = line.trim();

            if (resourceId) {
                // Subscribe to the resource
                await client.subscribe(resourceId);

                // Read the current instances
                const instance = await client.read(resourceId);
                console.dir(instance, { depth: null });

                // Write to the resource
                await writeResourceLoop(resourceId);
            }
        }
    };

    // Start the TUI loop
    await selectResource();
};

const clients = {
    sse: new SSEClient<string>('https://dev.v2.sync.xo.harvmaster.com', privateKey),
    encrypted: new EncryptedClientPerResource<string>(new SSEClient<string>('https://dev.v2.sync.xo.harvmaster.com', privateKey)),
};

const params = process.argv.slice(2);
const client = params[0] === 'false' ? clients.sse : clients.encrypted;

startTUI(client);