/*
 * Copyright (c) 2025 Ian Marco Moffett and L5 engineers
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the project nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/types.h>
#include <machine/uart.h>   /* shared */
#include <sys/syslog.h>
#include <io/cons/cons.h>
#include <os/spinlock.h>
#include <string.h>
#include <stdarg.h>

/*
 * If this value is true, data will be written to
 * the video console, otherwise only serial logging
 * will be used.
 */
static bool cons_enabled = false;

static void
syslog_write(const char *str, size_t len)
{
    static struct spinlock lock = {0};

    spinlock_acquire(&lock);
    for (int i = 0; i < len; ++i) {
        if (cons_enabled)
            cons_putstr(&g_root_scr, str, 1);
        uart_write(*str++);
    }
    spinlock_release(&lock);
}

void
vprintf(const char *fmt, va_list *ap)
{
    char buffer[1024] = {0};

    vsnprintf(buffer, sizeof(buffer), fmt, *ap);
    syslog_write(buffer, strlen(buffer));
}

void
printf(const char *fmt, ...)
{
    static va_list ap;

    va_start(ap, fmt);
    vprintf(fmt, &ap);
    va_end(ap);
}

void
syslog_toggle(bool enable)
{
    cons_enabled = enable;
}