// This file is part of noxos and licensed under the MIT open source license

#ifndef NOXOS_DRIVE_MANAGER_H
#define NOXOS_DRIVE_MANAGER_H

#include "drivers/fs/vfs.h"
#include "utils/stdtypes.h"
#include "utils/bitmap.h"

#define DRIVE_CHUNK_SIZE            16
#define DRIVE_PARTITION_CHUNK_SIZE  16

typedef enum {
    DRIVE_CONTROLLER_AHCI
} drive_controller_types_E;

typedef struct drive_chunk_T            drive_chunk_T;
typedef struct drive_partition_chunk_T  drive_partition_chunk_T;
typedef struct drive_partition_T        drive_partition_T;
typedef struct drive_T                  drive_T;

struct drive_partition_T{
    drive_partition_chunk_T*    chunk;
    uint32_t                    id_in_chunk;
    uint32_t                    id;
    drive_T*                    drive;
    fs_T                        filesystem;
    uint32_t                    start_sector;
    uint32_t                    end_sector;
};

struct drive_T {
    drive_chunk_T*              chunk;
    uint32_t                    id_in_chunk;
    uint32_t                    id;
    drive_partition_chunk_T*    partitions_chunks;
    drive_controller_types_E    controller_type;
    void*                       controller;
};

struct drive_chunk_T {
    drive_T             drives          [DRIVE_CHUNK_SIZE];
    bitmap_T            drives_bitmap;
    uint32_t        num_drives;
    drive_chunk_T*      prev;
    drive_chunk_T*      next;
};

struct drive_partition_chunk_T {
    drive_partition_T               partitions          [DRIVE_PARTITION_CHUNK_SIZE];
    bitmap_T                        partitions_bitmap;
    uint32_t                    num_partitions;
    drive_partition_chunk_T*        prev;
    drive_partition_chunk_T*        next;
};

typedef struct {
    drive_chunk_T* chunks;
} drive_manager_T;

drive_chunk_T*              drive_chunk_alloc               (drive_chunk_T* prev);
drive_partition_chunk_T*    drive_partition_chunk_alloc     (drive_partition_chunk_T* prev);
void                        drive_partition_chunk_destruct  (drive_partition_chunk_T* chunk);

void                        drive_manager_init              ();
drive_T*                    drive_manager_add_drive         (drive_controller_types_E controller_type, void* controller, void* device);
void                        drive_manager_remove_drive      (drive_T* drive);
drive_partition_T*          drive_manager_add_partition     (drive_T* drive, uint32_t start_sector, uint32_t end_sector);
void                        drive_manager_remove_partition  (drive_partition_T* partition);

#endif //NOXOS_DRIVE_MANAGER_H