#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <unistd.h>
#include <sys/types.h>
#include <signal.h>
#include <getopt.h>
#include <sys/stat.h>
#include <ctype.h>
#include <fcntl.h>

#include "rabincarp.h"

int file_open( const char *fname )
{
    int fd;

    fd = open( fname, O_RDONLY );
    if ( fd == -1 )
    {
        printf("Couldn open file %s\n", fname);
        return -1;
    }

    return fd;
}

int file_read( int fd, char *buf, int size )
{
    int ret;

    if ( size < 1 )
        return -1;

    ret = (int)read( fd, buf, size );

    return ret;
}

int file_seek( int fd, off_t pos )
{
    off_t rc;

    if (fd<1)
    {
        return -1;
    }

    rc = lseek( fd, pos, SEEK_SET );
    if (rc == -1)
        return -1;
    return 0;

}

int file_close( int fd )
{
    close( fd );
    return 0;
}

typedef struct match_params
{
    char *fname;
    char *match_str;
    int match_len;
    int buf_size;
    int verbose;
} match_params;


void helper( char *progname )
{
    printf("Usage: %s [OPTS]\n\n"
        " -f - input file\n"
        " -m - match string\n"
        //" -b - set buffer size to read\n"
        " -v - more extra info in output\n"
        "Version: 0.0.1 \n"
        "\n"
        , progname);
}

int main(int argc, char **argv)
{

	int c;
    int i;
	int fd;
    int text_len;
    int ret;

	char *text = NULL;

    //search
    rol_hash_isearch search;

	//parametrs
    match_params mp;

    memset(&mp,0,sizeof(match_params));

    while ( (c = getopt(argc, argv, "f:m:b:v")) != -1 )
    {
        switch(c)
        {
        case 'f':
                mp.fname = optarg;
            break;
        case 'm':
                mp.match_str = optarg;
                mp.match_len = strlen(optarg);
            break;
        case 'b':
                mp.buf_size = atoi(optarg);
            break;
        case 'v':
                mp.verbose = 1;
            break;
        default:
            helper( argv[0] );
            exit(1);
        }
    }

    if (argc<2)
    {
        helper(argv[0]);
        return -1;
    }
    
    
    if (mp.fname == NULL)
    {
        printf("Set filename\n");
        return -1;
    }
    
    if (mp.match_str == NULL)
    {
        printf("Set search string\n");
        return -1;
    }
    
    fd = file_open( mp.fname );
    if (fd<0)
    {
        printf("Couldnt open file %s\n", mp.fname);
        
        return -1;
    }

    text_len = lseek(fd,0,SEEK_END);
    lseek(fd, 0,SEEK_SET);
    text = malloc(text_len);
    //printf("Read %d bytes\n",read(fd,text,text_len));

    ret = read(fd, text, text_len);
    if (mp.verbose)
    {
        printf("Read %d bytes\n",ret);
    }


    rlsi_hash_init( &search, 10, 13);
    while ((i = rlsi_hash_search(&search, mp.match_str, mp.match_len, text, text_len)) == 1)
    {
      //printf("Found smth %d\n",rlsi_hash_get(&search));
        printf("%d\n",rlsi_hash_get(&search));
    }

    file_close( fd );

	return 0;
}