/*
 * Copyright (c) 2012, 2013 Dominik Taborsky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

 /** @addtogroup hdisk
 * @{
 */
/** @file
 */

#include <stdio.h>
#include <str.h>
#include <errno.h>
#include <str_error.h>
#include <sys/types.h>

#include "func_gpt.h"
#include "input.h"

static int set_gpt_partition(tinput_t *, gpt_part_t *, unsigned int);

int construct_gpt_label(label_t *this)
{
	this->layout = LYT_GPT;
	this->alignment = 1;
	
	this->add_part      = add_gpt_part;
	this->delete_part   = delete_gpt_part;
	this->destroy_label = destroy_gpt_label;
	this->new_label     = new_gpt_label;
	this->print_parts   = print_gpt_parts;
	this->read_parts    = read_gpt_parts;
	this->write_parts   = write_gpt_parts;
	this->extra_funcs   = extra_gpt_funcs;
	
	return this->new_label(this);
}

int add_gpt_part(label_t *this, tinput_t *in)
{
	gpt_part_t * p = gpt_get_partition(this->data.gpt);
	if (p == NULL) {
		return ENOMEM;
	}
	
	return set_gpt_partition(in, p, this->alignment);
}

int delete_gpt_part(label_t *this, tinput_t *in)
{
	int rc;
	size_t idx;
	
	printf("Number of the partition to delete (counted from 0): ");
	idx = get_input_size_t(in);
	
	rc = gpt_remove_partition(this->data.gpt, idx);
	if (rc == ENOMEM) {
		printf("Warning: running low on memory, not resizing...\n");
		return rc;
	} else if (rc == EINVAL) {
		printf("Invalid index.\n");
		return rc;
	}
	
	return EOK;
}

int destroy_gpt_label(label_t *this)
{
	gpt_free_label(this->data.gpt);
	return EOK;
}

int new_gpt_label(label_t *this)
{
	this->data.gpt = gpt_alloc_label();
	return EOK;
}

int print_gpt_parts(label_t *this)
{
	printf("Current partition scheme (GPT):\n");
	printf("%15s %10s %10s Type: Name:\n", "Start:", "End:", "Length:");
	
	size_t i = 0;
	
	gpt_part_foreach(this->data.gpt, iter) {
		i++;
		
		if (gpt_get_part_type(iter) == GPT_PTE_UNUSED)
			continue;
		
		if (i % 20 == 0)
			printf("%15s %10s %10s Type: Name:\n", "Start:", "End:", "Length:");
		
		
		printf("%3u  %10llu %10llu %10llu    %3d %s\n", i-1, gpt_get_start_lba(iter), gpt_get_end_lba(iter),
				gpt_get_end_lba(iter) - gpt_get_start_lba(iter), gpt_get_part_type(iter),
				gpt_get_part_name(iter));
		
	}
	
	return EOK;
}

int read_gpt_parts(label_t *this, service_id_t dev_handle)
{
	int rc;
	
	rc = gpt_read_header(this->data.gpt, dev_handle);
	if (rc != EOK) {
		printf("Error: Reading header failed: %d (%s)\n", rc, str_error(rc));
		return rc;
	}
	
	rc = gpt_read_partitions(this->data.gpt);
	if (rc != EOK) {
		printf("Error: Reading partitions failed: %d (%s)\n", rc, str_error(rc));
		return rc;
	}
	
	return EOK;
}

int write_gpt_parts(label_t *this, service_id_t dev_handle)
{
	int rc;
	
	rc = gpt_write_partitions(this->data.gpt, dev_handle);
	if (rc != EOK) {
		printf("Error: Writing partitions failed: %d (%s)\n", rc, str_error(rc));
		return rc;
	}
	
	rc = gpt_write_header(this->data.gpt, dev_handle);
	if (rc != EOK) {
		printf("Error: Writing header failed: %d (%s)\n", rc, str_error(rc));
		return rc;
	}
	
	return EOK;
}

int extra_gpt_funcs(label_t *this, tinput_t *in, service_id_t dev_handle)
{
	printf("Not implemented.\n");
	return EOK;
}

static int set_gpt_partition(tinput_t *in, gpt_part_t *p, unsigned int alignment)
{
	int rc;
	
	uint64_t sa, ea;
	
	printf("Set starting address (number): ");
	sa = get_input_uint64(in);
	if (sa % alignment != 0)
		sa = gpt_get_next_aligned(sa, alignment);
	
	printf("Set end addres (number): ");
	ea = get_input_uint64(in);
	
	if (ea <= sa) {
		printf("Invalid value.\n");
		return EINVAL;
	}
	
	gpt_set_start_lba(p, sa);
	gpt_set_end_lba(p, ea);
	
	//printf("Set type : ");
	//size_t idx = get_input_size_t(in);
	//gpt_set_part_type(p, idx);
	
	gpt_set_random_uuid(p->part_type);
	gpt_set_random_uuid(p->part_id);
	
	char *name;
	printf("Name the partition: ");
	rc = get_input_line(in, &name);
	if (rc != EOK) {
		printf("Error reading name: %d (%s)\n", rc, str_error(rc));
		return rc;
	}
	
	gpt_set_part_name(p, name, str_size(name));
	
	return EOK;
}