#ifndef SEAD_FILEDEVICE_H_
#define SEAD_FILEDEVICE_H_

#include <basis/seadTypes.h>
#include <container/seadSafeArray.h>
#include <container/seadTList.h>
#include <heap/seadDisposer.h>
#include <heap/seadHeap.h>
#include <prim/seadRuntimeTypeInfo.h>
#include <prim/seadSafeString.h>

namespace sead
{
class FileDevice;

using HandleBuffer = SafeArray<u8, 32>;

class HandleBase
{
public:
    HandleBase() = default;
    HandleBase(const HandleBase&) = delete;
    HandleBase& operator=(const HandleBase&) = delete;
    virtual ~HandleBase() = default;

    FileDevice* getDevice() const { return mDevice; }
    FileDevice* getOriginalDevice() const { return mOriginalDevice; }
    bool isOpened() const { return mOriginalDevice != nullptr; }

protected:
    friend class FileDevice;

    FileDevice* mDevice = nullptr;
    FileDevice* mOriginalDevice = nullptr;
    HandleBuffer mHandleBuffer{};
};

class FileHandle;
class DirectoryHandle;
struct DirectoryEntry;

class FileDevice : public TListNode<FileDevice*>, public IDisposer
{
    SEAD_RTTI_BASE(FileDevice)

public:
    enum FileOpenFlag
    {
        cFileOpenFlag_ReadOnly = 0,   // r
        cFileOpenFlag_WriteOnly = 1,  // w
        cFileOpenFlag_ReadWrite = 2,  // r+
        cFileOpenFlag_Create = 3      // w+
    };

    enum SeekOrigin
    {
        cSeekOrigin_Begin = 0,
        cSeekOrigin_Current = 1,
        cSeekOrigin_End = 2
    };

    struct LoadArg
    {
        SafeString path;
        u8* buffer = nullptr;
        u32 buffer_size = 0;
        Heap* heap = nullptr;
        s32 alignment = 0;
        s32 buffer_size_alignment = 0;
        /// Read chunk size
        u32 div_size = 0;
        bool assert_on_alloc_fail = true;
        bool check_read_entire_file = true;
        u32 read_size = 0;
        u32 roundup_size = 0;
        bool need_unload = false;
    };

    struct SaveArg
    {
        SafeString path = "";
        const u8* buffer = nullptr;
        u32 buffer_size = 0;
        u32 write_size = 0;
    };

public:
    FileDevice() : TListNode<FileDevice*>(this), IDisposer(), mDriveName(), mPermission(true) {}

    explicit FileDevice(const SafeString& name)
        : TListNode<FileDevice*>(this), IDisposer(), mDriveName(), mPermission(true)
    {
        setDriveName(name);
    }

    ~FileDevice() override;

    const SafeString& getDriveName() const { return mDriveName; }
    void setDriveName(const SafeString& name)
    {
#ifdef SEAD_DEBUG
        if (name.include(':'))
            SEAD_WARN("drive name should not include ':'. (in %s)", name.cstr());
#endif
        mDriveName = name;
    }

    bool hasPermission() const { return mPermission; }
    void setHasPermission(bool perm) { mPermission = perm; }

    bool isAvailable() const;

    u8* tryLoad(LoadArg& arg);

    bool save(SaveArg& arg)
    {
        if (!trySave(arg))
        {
            SEAD_ASSERT_MSG(false, "file save error");
            return false;
        }
        return true;
    }
    bool trySave(SaveArg& arg);

    FileDevice* open(FileHandle* handle, const SafeString& path, FileOpenFlag flag, u32 divSize = 0)
    {
        auto* device = tryOpen(handle, path, flag, divSize);
        if (!device)
        {
            SEAD_ASSERT_MSG(false, "file open error");
            return nullptr;
        }
        return device;
    }
    FileDevice* tryOpen(FileHandle* handle, const SafeString& path, FileOpenFlag flag,
                        u32 divSize = 0);

    bool close(FileHandle* handle)
    {
        if (!tryClose(handle))
        {
            SEAD_ASSERT_MSG(false, "file close error");
            return false;
        }
        return true;
    }
    bool tryClose(FileHandle* handle);

    bool flush(FileHandle* handle)
    {
        if (!tryFlush(handle))
        {
            SEAD_ASSERT_MSG(false, "file flush error");
            return false;
        }
        return true;
    }
    bool tryFlush(FileHandle* handle);

    bool remove(const SafeString& str)
    {
        if (!tryRemove(str))
        {
            SEAD_ASSERT_MSG(false, "file remove error");
            return false;
        }
        return true;
    }
    bool tryRemove(const SafeString& str);

    u32 read(FileHandle* handle, u8* data, u32 size)
    {
        u32 bytes_read = 0;
        if (!tryRead(&bytes_read, handle, data, size))
            SEAD_ASSERT_MSG(false, "file read error");
        return bytes_read;
    }
    bool tryRead(u32* bytesRead, FileHandle* handle, u8* outBuffer, u32 bytesToRead);

    u32 write(FileHandle* handle, const u8* data, u32 size)
    {
        u32 bytes_written = 0;
        if (!tryWrite(&bytes_written, handle, data, size))
            SEAD_ASSERT_MSG(false, "file write error");
        return bytes_written;
    }
    bool tryWrite(u32* bytesWritten, FileHandle* handle, const u8* inBuffer, u32 bytesToWrite);

    bool seek(FileHandle* handle, s32 offset, SeekOrigin origin)
    {
        if (!trySeek(handle, offset, origin))
        {
            SEAD_ASSERT_MSG(false, "file seek error");
            return false;
        }
        return true;
    }
    bool trySeek(FileHandle* handle, s32 offset, SeekOrigin origin);

    u32 getCurrentSeekPos(FileHandle* handle)
    {
        u32 seek_pos = 0;
        if (!tryGetCurrentSeekPos(&seek_pos, handle))
            SEAD_ASSERT_MSG(false, "tryGetCurrentSeekPos error");
        return seek_pos;
    }
    bool tryGetCurrentSeekPos(u32* seekPos, FileHandle* handle);

    u32 getFileSize(const SafeString& path)
    {
        u32 file_size = 0;
        if (!tryGetFileSize(&file_size, path))
            SEAD_ASSERT_MSG(false, "tryGetFileSize error");
        return file_size;
    }
    bool tryGetFileSize(u32* fileSize, const SafeString& path);

    u32 getFileSize(FileHandle* handle)
    {
        u32 file_size = 0;
        if (!tryGetFileSize(&file_size, handle))
            SEAD_ASSERT_MSG(false, "tryGetFileSize error");
        return file_size;
    }
    bool tryGetFileSize(u32* size, FileHandle* handle);

    bool isExistFile(const SafeString& path)
    {
        bool exists = false;
        if (!tryIsExistFile(&exists, path))
            SEAD_ASSERT_MSG(false, "tryIsExistFile error");
        return exists;
    }
    bool tryIsExistFile(bool* exists, const SafeString& path);

    bool isExistDirectory(const SafeString& path)
    {
        bool exists = false;
        if (!tryIsExistDirectory(&exists, path))
            SEAD_ASSERT_MSG(false, "isExistDirectory failed");
        return exists;
    }
    bool tryIsExistDirectory(bool* exists, const SafeString& path);

    FileDevice* openDirectory(DirectoryHandle* handle, const SafeString& path)
    {
        auto* device = tryOpenDirectory(handle, path);
        if (!device)
        {
            SEAD_ASSERT_MSG(false, "directory open error");
            return nullptr;
        }
        return device;
    }
    FileDevice* tryOpenDirectory(DirectoryHandle* handle, const SafeString& path);

    bool closeDirectory(DirectoryHandle* handle)
    {
        if (!tryCloseDirectory(handle))
        {
            SEAD_ASSERT_MSG(false, "directory close error");
            return false;
        }
        return true;
    }
    bool tryCloseDirectory(DirectoryHandle* handle);

    u32 readDirectory(DirectoryHandle* handle, DirectoryEntry* entries, u32 num_entries)
    {
        u32 entries_read = 0;
        if (!tryReadDirectory(&entries_read, handle, entries, num_entries))
            SEAD_ASSERT_MSG(false, "directory read error");
        return entries_read;
    }
    bool tryReadDirectory(u32* entriesRead, DirectoryHandle* handle, DirectoryEntry* entries,

                          u32 entriesToRead);

    bool makeDirectory(const SafeString& path, u32 x)
    {
        if (!tryMakeDirectory(path, x))
        {
            SEAD_ASSERT_MSG(false, "directory make error");
            return false;
        }
        return true;
    }
    bool tryMakeDirectory(const SafeString& path, u32);

    bool makeDirectoryWithParent(const SafeString& path, u32 x)
    {
        if (!tryMakeDirectoryWithParent(path, x))
        {
            SEAD_ASSERT_MSG(false, "directory make with parent error");
            return false;
        }
        return true;
    }
    bool tryMakeDirectoryWithParent(const SafeString& path, u32);

    s32 getLastRawError() const;

    virtual void traceFilePath(const SafeString& path) const;
    virtual void traceDirectoryPath(const SafeString& path) const;
    virtual void resolveFilePath(BufferedSafeString* out, const SafeString& path) const;
    virtual void resolveDirectoryPath(BufferedSafeString* out, const SafeString& path) const;
    virtual bool isMatchDevice_(const HandleBase* handle) const;

#ifdef SWITCH
    static const s32 cBufferMinAlignment = 0x20;
#else
    static const s32 cBufferMinAlignment = 0x40;
#endif

protected:
    virtual bool doIsAvailable_() const = 0;
    virtual u8* doLoad_(LoadArg& arg);
    virtual bool doSave_(SaveArg& arg);
    virtual FileDevice* doOpen_(FileHandle* handle, const SafeString& path, FileOpenFlag flag) = 0;
    virtual bool doClose_(FileHandle* handle) = 0;
    virtual bool doFlush_(FileHandle* handle) = 0;
    virtual bool doRemove_(const SafeString& str) = 0;
    virtual bool doRead_(u32* bytesRead, FileHandle* handle, u8* outBuffer, u32 bytesToRead) = 0;
    virtual bool doWrite_(u32* bytesWritten, FileHandle* handle, const u8* inBuffer,
                          u32 bytesToWrite) = 0;
    virtual bool doSeek_(FileHandle* handle, s32 offset, SeekOrigin origin) = 0;
    virtual bool doGetCurrentSeekPos_(u32* seekPos, FileHandle* handle) = 0;
    virtual bool doGetFileSize_(u32* fileSize, const SafeString& path) = 0;
    virtual bool doGetFileSize_(u32* fileSize, FileHandle* handle) = 0;
    virtual bool doIsExistFile_(bool* exists, const SafeString& path) = 0;
    virtual bool doIsExistDirectory_(bool* exists, const SafeString& path) = 0;
    virtual FileDevice* doOpenDirectory_(DirectoryHandle* handle, const SafeString& path) = 0;
    virtual bool doCloseDirectory_(DirectoryHandle* handle) = 0;
    virtual bool doReadDirectory_(u32* entriesRead, DirectoryHandle* handle,
                                  DirectoryEntry* entries, u32 entriesToRead) = 0;
    virtual bool doMakeDirectory_(const SafeString& path, u32) = 0;
    virtual s32 doGetLastRawError_() const = 0;
    virtual void doTracePath_(const SafeString& path) const;
    virtual void doResolvePath_(BufferedSafeString* out, const SafeString& path) const;

    void setFileHandleDivSize_(FileHandle* handle, u32 divSize) const;
    void setHandleBaseFileDevice_(HandleBase* handle, FileDevice* device) const;
    void setHandleBaseOriginalFileDevice_(HandleBase* handle, FileDevice* device) const;
    HandleBuffer& getHandleBaseHandleBuffer_(HandleBase* handle) const;

    FixedSafeString<32> mDriveName;
    bool mPermission;
};

class FileHandle : public HandleBase
{
public:
    FileHandle() : HandleBase(), mDivSize(0) {}

    virtual ~FileHandle()
    {
        FileDevice* _device = mOriginalDevice;
        if (_device != NULL)
            _device->tryClose(this);
    }

    bool close();
    bool tryClose();

    bool flush();
    bool tryFlush();

    u32 read(u8* outBuffer, u32 bytesToRead);
    bool tryRead(u32* actual_size, u8* data, u32 size);

    u32 write(const u8* data, u32 size);
    bool tryWrite(u32* actual_size, const u8* data, u32 size);

    bool seek(s32 offset, FileDevice::SeekOrigin origin);
    bool trySeek(s32 offset, FileDevice::SeekOrigin origin);
    u32 getCurrentSeekPos();
    bool tryGetCurrentSeekPos(u32* pos);

    u32 getFileSize();
    bool tryGetFileSize(u32* size);

    u32 getDivSize() const { return mDivSize; }

protected:
    friend class FileDevice;

    s32 mDivSize;
};

class DirectoryHandle : public HandleBase
{
public:
    DirectoryHandle() : HandleBase() {}

    virtual ~DirectoryHandle()
    {
        FileDevice* _device = mOriginalDevice;
        if (_device != NULL)
            _device->tryCloseDirectory(this);
    }

    bool close();
    bool tryClose();
    u32 read(DirectoryEntry* entries, u32 count);
    bool tryRead(u32* actual_count, DirectoryEntry* entries, u32 count);
};

struct DirectoryEntry
{
    DirectoryEntry() : name(), is_directory(false) {}

    FixedSafeString<256> name;
    bool is_directory;
};

}  // namespace sead

#endif  // SEAD_FILEDEVICE_H_