import { stdin, stdout } from 'node:process';
import type { Key } from 'node:readline';
import * as readline from 'node:readline';
import type { Readable, Writable } from 'node:stream';
import { ReadStream } from 'node:tty';
import { cursor } from 'sisteransi';
import { isActionKey } from './settings.js';

export * from './settings.js';
export * from './string.js';

const isWindows = globalThis.process.platform.startsWith('win');

export const CANCEL_SYMBOL = Symbol('clack:cancel');

export function isCancel(value: unknown): value is symbol {
	return value === CANCEL_SYMBOL;
}

export function setRawMode(input: Readable, value: boolean) {
	const i = input as typeof stdin;

	if (i.isTTY) i.setRawMode(value);
}

interface BlockOptions {
	input?: Readable;
	output?: Writable;
	overwrite?: boolean;
	hideCursor?: boolean;
}

export function block({
	input = stdin,
	output = stdout,
	overwrite = true,
	hideCursor = true,
}: BlockOptions = {}) {
	const rl = readline.createInterface({
		input,
		output,
		prompt: '',
		tabSize: 1,
	});
	readline.emitKeypressEvents(input, rl);

	if (input instanceof ReadStream && input.isTTY) {
		input.setRawMode(true);
	}

	const clear = (data: Buffer, { name, sequence }: Key) => {
		const str = String(data);
		if (isActionKey([str, name, sequence], 'cancel')) {
			if (hideCursor) output.write(cursor.show);
			process.exit(0);
			return;
		}
		if (!overwrite) return;
		const dx = name === 'return' ? 0 : -1;
		const dy = name === 'return' ? -1 : 0;

		readline.moveCursor(output, dx, dy, () => {
			readline.clearLine(output, 1, () => {
				input.once('keypress', clear);
			});
		});
	};
	if (hideCursor) output.write(cursor.hide);
	input.once('keypress', clear);

	return () => {
		input.off('keypress', clear);
		if (hideCursor) output.write(cursor.show);

		// Prevent Windows specific issues: https://github.com/bombshell-dev/clack/issues/176
		if (input instanceof ReadStream && input.isTTY && !isWindows) {
			input.setRawMode(false);
		}

		// @ts-expect-error fix for https://github.com/nodejs/node/issues/31762#issuecomment-1441223907
		rl.terminal = false;
		rl.close();
	};
}

export const getColumns = (output: Writable): number => {
	if ('columns' in output && typeof output.columns === 'number') {
		return output.columns;
	}
	return 80;
};

export const getRows = (output: Writable): number => {
	if ('rows' in output && typeof output.rows === 'number') {
		return output.rows;
	}
	return 20;
};
