#include "../include/vfs.h"
#include "../include/stdio.h"
#include "../include/string.h"

l9660_fs   global_fs;

bool read_sector_callback(l9660_fs *fs, void *buf, uint32_t sector) {
    // The 'fs' parameter is not needed for our simple case, so we can ignore it.
    (void)fs;

    // Call your existing CD-ROM read function to read 1 sector.
    // We assume the CD-ROM is the secondary master (0x170).
    int result = read_cdrom(0x170, false, sector, 1, (uint16_t*)buf);

    // lib9660 expects 'true' for success and 'false' for failure.
    // Your read_cdrom returns 0 for success.
    return (result == 0);
}

void mount_fs()
{
    l9660_status status = l9660_openfs(&global_fs, read_sector_callback);

    if (status != L9660_OK) {
        printf("Error opening ISO9660 filesystem!\n");
        return;
    }
    printf("FS mounted\n");
}

void list_files(l9660_dir *dir)
{
    debug_log("----------CONTENTS----------");
    l9660_status status;
    for (;;) {
        l9660_dirent *dent;
        status = l9660_readdir(dir, &dent);

        if (dent == NULL || status != L9660_OK) {
            break; // End of directory or error
        }

        // Print the filename. It's not null-terminated, so use the length field.
        for (int i = 0; i < dent->name_len; ++i) {
            printf("%c", dent->name[i]);
        }
        printf("\n");
    }
}


size_t vfs_read_file(l9660_file *file, uint8_t* buffer)
{
    size_t total_read = 0;
    for(;;) {
        char buf[128];
        size_t read;
        l9660_read(file, buf, 128, &read);

        //check for EOF
        if (read == 0)
            break;
        
        memcpy(buffer, buf, 128);
        buffer += 128;
        total_read += read;
    }

    //reset the current position to the original position
    buffer -= total_read;
    return total_read;
}