/*-
 * 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 <ubixos/sched.h>
#include <sys/thread.h>
#include <sys/sysproto_posix.h>
#include <sys/descrip.h>
#include <sys/video.h>
#include <string.h>
#include <ufs/ufs.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);

	kprintf("sO: 0x%X:%s", args->mode, args->path);

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

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

		td->td_retval[0] = -1;
		error = -1;
	} else {
		td->td_retval[0] = fd;
	}

	return (error);
}

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

	kprintf("openat");

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

	if (error)
		return (error);

	if ((args->flag & O_WRONLY) == O_WRONLY)
		nfp->fd = fopen(args->path, "w");
	else if ((args->flag & O_RDWR) == O_RDWR)
		nfp->fd = fopen(args->path, "a");
	else
		nfp->fd = fopen(args->path, "r");

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

		td->td_retval[0] = -1;
		error = -1;

		kprintf("[sOA: 0x%X:%s:%s:%i]", args->flag, args->mode, args->path,
				td->td_retval[0]);

		if ((args->flag & O_RDONLY) == O_RDONLY)
			kprintf("O_RDONLY");

		if ((args->flag & O_WRONLY) == O_WRONLY)
			kprintf("O_WRONLY");

		if ((args->flag & O_RDWR) == O_RDWR)
			kprintf("O_RDWR");

		if ((args->flag & O_ACCMODE) == O_ACCMODE)
			kprintf("O_ACCMODE");

	} else {
		td->td_retval[0] = fd;
	}

	return (error);
}

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

	kprintf("[sC:%i:0x%X:0x%X]", args->fd, fd, fd->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) {
	int x = 0;
	char c = 0x0;
	char bf[2];
	volatile 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 {
		bf[1] = '\0';
		if (_current->term == tty_foreground)
			c = getchar();

		for (x = 0; x < args->nbyte && c != '\n';) {
			if (_current->term == tty_foreground) {

				if (c != 0x0) {
					buf[x++] = c;
					bf[0] = c;
					kprintf(bf);
				}

				if (c == '\n') {
					buf[x++] = c;
					break;
				}

				sched_yield();
				c = getchar();
			} else {
				sched_yield();
			}
		}
		if (c == '\n')
			buf[x++] = '\n';

		bf[0] = '\n';
		kprintf(bf);

		td->td_retval[0] = x;
	}
	return (0);
}

int sys_pread(struct thread *td, struct sys_pread_args *args) {
	int offset = 0;
	int x = 0;
	char c = 0x0;
	char bf[2];
	volatile char *buf = args->buf;

	struct file *fd = 0x0;

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

	if (args->fd > 3) {
		offset = fd->fd->offset;
		fd->fd->offset = args->offset;
		td->td_retval[0] = fread(args->buf, args->nbyte, 1, fd->fd);
		fd->fd->offset = offset;
	} else {
		bf[1] = '\0';
		if (_current->term == tty_foreground)
			c = getchar();

		for (x = 0; x < args->nbyte && c != '\n';) {
			if (_current->term == tty_foreground) {

				if (c != 0x0) {
					buf[x++] = c;
					bf[0] = c;
					kprintf(bf);
				}

				if (c == '\n') {
					buf[x++] = c;
					break;
				}

				sched_yield();
				c = getchar();
			} else {
				sched_yield();
			}
		}
		if (c == '\n')
			buf[x++] = '\n';

		bf[0] = '\n';
		kprintf(bf);

		td->td_retval[0] = x;
	}
	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;
		kprintf(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);
		kprintf(buffer);
		kfree(buffer);
		td->td_retval[0] = uap->nbyte;
	} else {
		kprintf("[%i]", uap->nbyte);
		buffer = kmalloc(uap->nbyte);
		memcpy(buffer, uap->buf, uap->nbyte);
		kprintf("(%i) %s", uap->fd, uap->buf);
		kfree(buffer);
		td->td_retval[0] = uap->nbyte;
	}
	return (0x0);
}

int sys_access(struct thread *td, struct sys_access_args *args) {
	kprintf("%s:%i", args->path, args->amode);
	td->td_retval[0] = 0;
	return (0);
}

int sys_getdirentries(struct thread *td, struct sys_getdirentries_args *args) {
	//kprintf("GDE: [%i:%i:0x%X]", args->fd, args->count, args->basep);
	struct file *fd = 0x0;
	getfd(td, &fd, args->fd);

	char buf[DEV_BSIZE];
	struct dirent *d;
	char *s;
	ssize_t n;

	//fd->offset = 0;
	td->td_retval[0] = fread(args->buf, args->count, 1, fd->fd);
	//n = fsread(fd->fd->ino, args->buf, DEV_BSIZE, fd->fd);
	//td->td_retval[0] = n;

	/*
	 while ((n = fsread(*ino, buf, DEV_BSIZE, fd)) > 0)
	 for (s = buf; s < buf + DEV_BSIZE;) {
	 d = (void *) s;
	 if (!strcmp(name, d->d_name)) {
	 *ino = d->d_fileno;
	 return d->d_type;
	 }
	 s += d->d_reclen;
	 }
	 */

	return (0);
}