#pragma once
#include <stdint.h>
#include <stdbool.h>
#include <stddef.h>
#include "termios.h"
#include "mp/spinlock.h"
#include "libk/resource.h"
#include "libk/event.h"

#define LINE_BUF_SZ 4096

struct console {
	struct resource res;
	struct termios   term;
	size_t           width, height;
	bool             decckm;

	/* ── job control ─────────────────────────────────────────────────── */
	int64_t          fg_pgrp;   /* foreground process group; 0 = none */
	int64_t          session;   /* owning session; 0 = none           */

	/* ── line-discipline assembly buffer ─────────────────────────────── */
	char             line_buf[LINE_BUF_SZ];
	size_t           line_len;       /* bytes currently in line_buf */
	size_t           line_read_off;  /* drain offset (for partial reads) */
	bool             line_ready;     /* true when a delimiter has landed */
	bool             lnext_pending;  /* VLNEXT: next byte taken literally */

	/* ── concurrent-reader serialization ─────────────────────────────── */
	/* Separate from res.lock so we can hold it across the blocking
	 * input_read() without holding res.lock. Serializes the line-assembly
	 * loop in console_read across multiple concurrent readers (e.g. parent
	 * + child after fork) so their bytes can't interleave on line_buf.
	 *
	 * Sleep-mutex serializing the line-assembly loop across concurrent
	 * readers. We hold this across the blocking input_read() — so it MUST
	 * be a sleep-mutex, not a spinlock (a spinlock held while the holder
	 * sleeps in event_await would deadlock the second reader). Built on
	 * top of the existing event primitive. */
	spinlock_t       read_mutex_lock;   /* short-held; protects the two fields below */
	bool             read_mutex_held;
	struct event     read_mutex_released;
};

void console_init(void);