/*
 * Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <AK/AllOf.h>
#include <Kernel/Storage/Partition/DiskPartitionMetadata.h>

namespace Kernel {

DiskPartitionMetadata::PartitionType::PartitionType(u8 partition_type)
{
    m_partition_type[0] = partition_type;
}
DiskPartitionMetadata::PartitionType::PartitionType(Array<u8, 16> partition_type)
    : m_partition_type_is_uuid(true)
{
    m_partition_type.span().overwrite(0, partition_type.data(), partition_type.size());
}
UUID DiskPartitionMetadata::PartitionType::to_uuid() const
{
    VERIFY(is_uuid());
    return m_partition_type;
}
u8 DiskPartitionMetadata::PartitionType::to_byte_indicator() const
{
    VERIFY(!is_uuid());
    return m_partition_type[0];
}
bool DiskPartitionMetadata::PartitionType::is_uuid() const
{
    return m_partition_type_is_uuid;
}
bool DiskPartitionMetadata::PartitionType::is_valid() const
{
    return !all_of(m_partition_type, [](const auto octet) { return octet == 0; });
}

DiskPartitionMetadata::DiskPartitionMetadata(u64 start_block, u64 end_block, u8 partition_type)
    : m_start_block(start_block)
    , m_end_block(end_block)
    , m_type(partition_type)
{
    VERIFY(m_type.is_valid());
}

DiskPartitionMetadata::DiskPartitionMetadata(u64 start_block, u64 end_block, Array<u8, 16> partition_type)
    : m_start_block(start_block)
    , m_end_block(end_block)
    , m_type(partition_type)
{
    VERIFY(m_type.is_valid());
}

DiskPartitionMetadata::DiskPartitionMetadata(u64 start_block, u64 end_block, Array<u8, 16> partition_type, UUID unique_guid, u64 special_attributes)
    : m_start_block(start_block)
    , m_end_block(end_block)
    , m_type(partition_type)
    , m_unique_guid(unique_guid)
    , m_attributes(special_attributes)
{
    VERIFY(m_type.is_valid());
    VERIFY(!m_unique_guid.is_zero());
}

DiskPartitionMetadata DiskPartitionMetadata::offset(u64 blocks_count) const
{
    return { blocks_count + m_start_block, blocks_count + m_end_block, m_type.m_partition_type };
}

u64 DiskPartitionMetadata::start_block() const
{
    return m_start_block;
}

u64 DiskPartitionMetadata::end_block() const
{
    return m_end_block;
}

Optional<u64> DiskPartitionMetadata::special_attributes() const
{
    if (m_attributes == 0)
        return {};
    return m_attributes;
}

const DiskPartitionMetadata::PartitionType& DiskPartitionMetadata::type() const
{
    return m_type;
}

const UUID& DiskPartitionMetadata::unique_guid() const
{
    return m_unique_guid;
}

}