#include <dirent.h>
#include "../types/pathbuf.h"

// #include <stdio.h>
// #include <dirent.h>
// #include <string.h>
// #include <sys/stat.h>

#ifndef FILE_H_
    #define FILE_H_

    typedef struct {
        bool open;            // true if an entry is open
        bool success;         // true if the previous operation was successful
        bool is_dir;          // true if the open entry is a directory
        bool child_is_dir;    // true if the selected child is a directory
        PathBuf entry;        // write buffer for entry port
        PathBuf action;       // write buffer for action port
        PathBuf path;         // path of the open entry
        PathBuf child_path;   // path of the selected child
        u32 pointer;          // pointer in the open entry, whether dir or file
        u32 length;           // length of the open entry, whether dir or file
        u32 pointer_write;    // write cache for pointer
        u32 length_write;     // write cache for length

        DIR  *dir;            // structure pointing to current directory
        FILE *file;           // opaque ID referencing the open file

        FILE *tmpfile;        // to open file and keep existing file open
        struct dirent *child; // currently-selected directory child information
        u32 dir_i;            // index of next child to read from dir
    } FileDevice;

    void init_filesystem();
    bool filesystem_enabled();

    void fs_push_entry(FileDevice *fs, u8 byte);
    void fs_push_action(FileDevice *fs, u8 byte);
    bool fs_push_byte(PathBuf *buf, u8 byte);

    u8 fs_read_byte(FileDevice *fs);
    void fs_write_byte(FileDevice *fs, u8 byte);

    void fs_ascend(FileDevice *fs);
    void fs_descend(FileDevice *fs);

    void fs_seek(FileDevice *fs);
    void fs_resize(FileDevice *fs);

    void fs_select_child(FileDevice *fs, u32 pointer);

#endif