#!/usr/bin/env node
import { createInterface } from 'readline';
import { readdirSync, readlinkSync, readFileSync } from 'fs';
import { send_to_claude } from './paste.mjs';

const args = process.argv.slice(2);

function print_usage() {
	console.error(`
Usage:
  claude-remote <text>                        paste text and submit
  claude-remote --no-submit <text>            paste text without pressing Enter
  claude-remote --focus-only                  focus the window without pasting
  claude-remote --find-window                 print the detected window ID and exit
  claude-remote --list-procs                  list all running processes with exe paths
  claude-remote --window-id <id> <text>       use specific window ID (decimal or 0x hex)
  echo "text" | claude-remote                 read text from stdin
`.trim());
}


async function read_stdin() {
	const rl = createInterface({ input: process.stdin });
	const lines = [];
	for await (const line of rl) {
		lines.push(line);
	}
	return lines.join('\n');
}

async function main() {
	if (args.includes('--help') || args.includes('-h')) {
		print_usage();
		process.exit(0);
	}

	if (args.includes('--list-procs')) {
		for (const entry of readdirSync('/proc')) {
			if (!/^\d+$/.test(entry)) {
				continue;
			}
			try {
				const exe = readlinkSync(`/proc/${entry}/exe`);
				const raw = readFileSync(`/proc/${entry}/cmdline`, 'utf8');
				const cmdline = raw.replace(/\0/g, ' ').trim();
				console.log(`${entry}\t${exe}\t${cmdline}`);
			} catch {
				// process may have exited
			}
		}
		return;
	}

	if (args.includes('--find-window')) {
		try {
			const id = await send_to_claude('', { focus_only: true, debug: true });
			console.log(id);
		} catch (err) {
			console.error(`No Claude window found: ${err.message}`);
			process.exit(1);
		}
		return;
	}

	const focus_only = args.includes('--focus-only');
	const submit = !args.includes('--no-submit');
	const window_id_idx = args.indexOf('--window-id');
	const window_id = window_id_idx !== -1 ? args[window_id_idx + 1] : undefined;
	const text_args = args.filter((a, i) => {
		if (a === '--no-submit' || a === '--focus-only') { return false; }
		if (a === '--window-id') { return false; }
		if (i > 0 && args[i - 1] === '--window-id') { return false; }
		return true;
	});

	if (focus_only) {
		try {
			const window_id = await send_to_claude('', { focus_only: true });
			console.error(`Focused window ${window_id}`);
		} catch (err) {
			console.error(`Error: ${err.message}`);
			process.exit(1);
		}
		return;
	}

	let text;
	if (text_args.length > 0) {
		text = text_args.join(' ');
	} else if (!process.stdin.isTTY) {
		text = await read_stdin();
	} else {
		print_usage();
		process.exit(1);
	}

	if (!text.trim()) {
		console.error('No text provided');
		process.exit(1);
	}

	try {
		const used_id = await send_to_claude(text, { submit, window_id });
		console.error(`Sent to window ${used_id}`);
	} catch (err) {
		console.error(`Error: ${err.message}`);
		process.exit(1);
	}
}

main();