/*
 * 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 <sys/typefmt.h>
#include "func_gpt.h"
#include "input.h"

static void print_part_types(void);
static int set_gpt_partition(tinput_t *, gpt_part_t *, label_t *);

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 *partition = gpt_get_partition(this->data.gpt);
	if (partition == NULL)
		return ENOMEM;
	
	return set_gpt_partition(in, partition, this);
}

int delete_gpt_part(label_t *this, tinput_t *in)
{
	printf("Index of the partition to delete (counted from 0): ");
	size_t idx = get_input_size_t(in);
	
	int rc = gpt_remove_partition(this->data.gpt, idx);
	if (rc == ENOMEM) {
		printf("Warning: Running out 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("Number of blocks: %" PRIu64 "\n", this->blocks);
	
	size_t i = 0;
	gpt_part_foreach (this->data.gpt, iter) {
		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("%3zu  %10" PRIu64 " %10" PRIu64 " %10" PRIu64 "    %3zu %s\n",
		   i, 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));
		
		i++;
	}
	
	return EOK;
}

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

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

static int set_gpt_partition(tinput_t *in, gpt_part_t *partition, label_t *this)
{
	printf("Set starting address: ");
	uint64_t sa = get_input_uint64(in);
	if ((this->alignment != 0) && (this->alignment != 1) &&
	    (sa % this->alignment != 0))
		sa = gpt_get_next_aligned(sa, this->alignment);
	
	printf("Set end address (max: %" PRIu64 "): ", this->blocks);
	uint64_t ea = get_input_uint64(in);
	
	if (ea <= sa) {
		printf("Invalid value.\n");
		return EINVAL;
	}
	
	gpt_set_start_lba(partition, sa);
	gpt_set_end_lba(partition, ea);
	
	printf("Choose type: ");
	print_part_types();
	printf("Set type (1 for HelenOS System): ");
	size_t idx = get_input_size_t(in);
	gpt_set_part_type(partition, idx);
	
	gpt_set_random_uuid(partition->part_id);
	
	printf("Name the partition: ");
	char *name;
	int 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(partition, name, str_size(name));
	
	return EOK;
}

static void print_part_types(void)
{
	unsigned int count = 0;
	const partition_type_t *ptype = gpt_ptypes;
	
	do {
		printf("%u: %s\n", count, ptype->desc);
		count++;
		ptype++;
		
		if (count % 10 == 0) {
			printf("Print (more) partition types? (y/n)\n");
			int c = getchar();
			if (c == 'n')
				return;
		}
	} while (ptype->guid != NULL);
}