/*-
 * Copyright (c) 2002-2018 The UbixOS Project.
 * All rights reserved.
 *
 * This was developed by Christopher W. Olsen for the UbixOS Project.
 *
 * 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, the following disclaimer and the list of authors.
 * 2) Redistributions in binary form must reproduce the above copyright notice, this list of
 *    conditions, the following disclaimer and the list of authors in the documentation and/or
 *    other materials provided with the distribution.
 * 3) Neither the name of the UbixOS 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 AUTHOR 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/thread.h>
#include <sys/sysproto.h>
#include <sys/descrip.h>
#include <sys/video.h>
#include <string.h>

int sys_open(struct thread *td, struct sys_open_args *args) {
  int error = 0x0;
  int fd = 0x0;
  struct file *nfp = 0x0;

  error = falloc(td, &nfp, &fd);

  if (error)
    return (error);

  nfp->fd = fopen(args->path, "r");

  if (nfp->fd == 0x0) {
    fdestroy(td, nfp, fd);

    td->td_retval[0] = -1;
    error = -1;
  }
  else {
    td->td_retval[0] = fd; //nfp->fd; //MrOlsen 2018index;
  }

  return (error);
}

int sys_close(struct thread *td, struct sys_close_args *args) {
  struct file *fd = 0x0;

  getfd(td, &fd, args->fd);

  if (fd == 0x0) {
    td->td_retval[0] = -1;
  }
  else {
    if (!fclose(fd->fd))
      td->td_retval[0] = -1;
    else {
      fdestroy(td, fd, args->fd);
      td->td_retval[0] = 0;
    }
  }
  return (0);
}

int sys_read(struct thread *td, struct sys_read_args *args) {
  char *buf = args->buf;

  struct file *fd = 0x0;

  getfd(td, &fd, args->fd);

  if (args->fd > 3) {
    td->td_retval[0] = fread(args->buf, args->nbyte, 1, fd->fd);
  }
  else {
    kprintf("ARGS->fd: %i, NBYTE: %i\n", args->fd, args->nbyte);
    buf[0] = 'C';
    buf[1] = 'A';
    buf[2] = 'T';
    buf[3] = '\0';
    td->td_retval[0] = 3;
    kprintf("DUMMY FUNC FIX ME! sys_read");
  }
  return (0);
}

int sys_write(struct thread *td, struct sys_write_args *uap) {
  char *buffer = 0x0;

  if (uap->fd == 2) {
    buffer = kmalloc(1024);
    memcpy(buffer, uap->buf, uap->nbyte);
    printColor += 1;
    kprint(buffer);
    printColor = defaultColor;
    kfree(buffer);
    td->td_retval[0] = uap->nbyte;
  }
  else if (uap->fd == 1) {
    buffer = kmalloc(1024);
    memcpy(buffer, uap->buf, uap->nbyte);
    kprint(buffer);
    kfree(buffer);
    td->td_retval[0] = uap->nbyte;
  }
  else {
    kprintf("[%i]", uap->nbyte);
    buffer = kmalloc(uap->nbyte);
    memcpy(buffer, uap->buf, uap->nbyte);
    //kprint(buffer);
    kfree(buffer);
    kprintf("(%i) %s", uap->fd, uap->buf);
    td->td_retval[0] = uap->nbyte;
  }
  return (0x0);
}