/***
    Copyright (C) 2023 Jamie Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: Devices.hpp
    Date: 2023-08-11
    Date: 2023-12-05
    Author: Reece
***/
#pragma once

namespace Aurora::IO::FS
{
    AUE_DEFINE(EFSDeviceType, (
        eDeviceDisk,
        eDeviceSCSI,
        eDeviceCD,
        eDeviceUSBMass,
        eDeviceFloppy,
        eDeviceNetworkMount,
        eDeviceRamDisk,
        eDeviceROMWindow,
        eDeviceUnknown
    ))

    AUE_DEFINE(EFSBusType, (
        eBusGeneric,
        eBusSCSI,
        eBusSATA,
        eBusUSB,
        eBusNetwork
    ))

    struct LogicalUsedResponse
    {
        AuUInt64 uLogicalSize {};
        AuUInt64 uLogicalUsed {};
    };

    struct LogicalOffsetResponse
    {
        AuUInt64 uLogicalSize {};
        AuUInt64 uLogicalOffset {};
    };

    struct FSLogicalPartition
    {
        AuString devicePath;
        AuString logicalMount;
        AuList<AuString> filesystemMountPoints;
        AuOptional<AuString> name;
        LogicalUsedResponse space;
        LogicalOffsetResponse offset;
        bool bIsReadOnly {};
        uuids::uuid uuid;
        // ... ?
    };

    struct FSDevice
    {
        EFSDeviceType type;
        EFSBusType bus;
        AuString devicePath;
        AuString productModel;
        AuOptional<AuString> altLabel;
        AuOptional<AuString> altProductDescription;
        AuList<FSLogicalPartition> partitions;
        AuUInt64 uFSDeviceSizeInBytes {};
        AuUInt64 uFSDevicePageSizeInBytes {};
        uuids::uuid uuid;
    };

    AUKN_SYM AuString GetRootFromPath(const AuString &fileOrDirPath);

    AUKN_SYM AuResult<AuString> GetDeviceFromPath(const AuString &fileOrDirPath);
    AUKN_SYM AuResult<AuString> GetDeviceFromRoot(const AuString &root);
    AUKN_SYM AuResult<AuString> GetLogicalMountFromPath(const AuString &fileOrDirPath);

    AUKN_SYM AuString TrySimplifyDevicePath(const AuString &deviceOrLogicalMountPath);

    // max: unbuffered pipe io
    AUKN_SYM AuUInt32 GetPerformanceBufferSizeFromPath(const AuString &fileOrDirPath);
    // min: unbuffered pipe io
    AUKN_SYM AuUInt32 GetPhysicalSectorSizeFromPath(const AuString &fileOrDirPath);
    // min viable sector size with abstractions on top of the disk
    AUKN_SYM AuUInt32 GetLogicalSectorSizeFromPath(const AuString &fileOrDirPath);

    AUKN_SYM LogicalUsedResponse GetLogicalUsedFromPath(const AuString &fileOrDirPath);
    AUKN_SYM LogicalUsedResponse GetLogicalUsedFromLogicalDevice(const AuString &logicalMountPath);

    AUKN_SYM AuUInt64 GetDeviceSizeInBytes(const AuString& physicalDevicePath);

    AUKN_SYM AuResult<AuString>      GetDeviceModel(const AuString& physicalDevicePath);

    AUKN_SYM AuResult<FSDevice>      GetFSDeviceByFilePath(const AuString &fileOrDirPath);
    AUKN_SYM AuResult<FSDevice>      GetFSDeviceByDevice(const AuString &physicalDevicePath);
    AUKN_SYM AuList<FSDevice>        GetFSDevices();
    AUKN_SYM const AuList<FSDevice> &GetFSDevicesCachedUnsafe();
    AUKN_SYM void                    ResetDeviceCache();
}