#ifndef _FAT16_H
#define _FAT16_H

#include <types.h>

#define FAT16_MAX_FILENAME  256
#define FAT16_ATTR_DIRECTORY 0x10

typedef struct {
    uint8_t drive;
    uint32_t fat_start;
    uint32_t root_dir_start;
    uint32_t data_start;
    uint16_t bytes_per_sector;
    uint8_t sectors_per_cluster;
    uint16_t root_entry_count;
    uint32_t current_dir_cluster;
} fat16_t;

typedef struct {
    char name[FAT16_MAX_FILENAME];
    uint8_t attr;
    uint32_t cluster;
    uint32_t size;
} fat16_dir_entry_t;

int32_t fat16_init(uint8_t drive);

uint32_t cluster_to_lba(uint16_t cluster);
uint16_t fat16_get_fat_entry(uint16_t cluster);
uint16_t fat16_alloc_cluster(void);

int32_t fat16_list_dir(fat16_dir_entry_t* entries, size_t max_entries);
int32_t fat16_change_dir(const char* dirname);
int32_t fat16_read_file(const char* filename, void* buffer, size_t max_size);
int32_t fat16_write_file(const char* filename, const void* data, size_t size);

#endif