//Filename: load.c
//Developer: Jay Suttiruttana

#include "btree.h"


void main(int argc, char *argv[])
{
	page_type d_parent;         /* Dummy parent for the root  */
	Record_type record;
	Status_type retval;
	Item_type   item, promo_item;
	int     root, promo_rrn, rec_rrn;
	int rec_count=0, total_rec=0;
	char c;

	Record_type *block_record;
	block_record=(Record_type*) calloc (4,sizeof(Record_type));
	

	if(argc != 2)						 // check arguments
    {
		printf("ERROR!"); 
		exit(1);
	}
	inp_open(argv[1]);
	
	if ((fd_datafile = _open("records.txt", O_CREAT|O_TRUNC|O_RDWR/*|O_BINARY*/, 0777)) < 0)
		Error("\nError! problem creating the data base file");
	pageinit(&d_parent);      /* Initialize dummy parent     */
	rec_rrn = 0;              /* Initialize record RRN       */
	


   /* Create B-Tree file and get RRN of the root*/
	root = create_tree(&record);
	block_record[rec_count]= record;
	rec_count++;
	total_rec++;
   /* Get all the records in the input file*/
	while(get_record(&record)) {
      
	
		/* Store key Number along with the RRN of the record*/
		item.key = atoi(record.RICORDI);
		item.rec_rrn = ++rec_rrn;
		printf("%d inserted\n",item.key);

		

      /* Store RRN of the root in dummy parent*/
		d_parent.child[0] = root;

		retval = insert(&d_parent, NIL, 0, item, &promo_rrn, &promo_item);

		if(retval == PROMOTION)
			root = create_root(promo_item, root, promo_rrn);

		else if(retval == ERROR) {
			printf("a duplicate key was located.\n", record.RICORDI);
			--rec_rrn;
		}




	if(retval != ERROR)
								
		 block_record[rec_count]= record;
				
	if(total_rec < 4)
	{
		if (rec_count>=3)	// AFTER 4 record at a time to datafile
		{
		
		write(fd_datafile,block_record,BUFFSIZE);						
		rec_count =-1;								// reset record count
		}
	}
else	
    if(rec_count>=3)	// AFTER 4 record at a time to datafile
	{
		
		write(fd_datafile,block_record,BUFFSIZE);						
		rec_count =-1;
		memset (block_record, '\0',BUFFSIZE);
	}
	rec_count++;

	total_rec++;
	}
	
	if(rec_count >=0)
            write(fd_datafile,block_record,BUFFSIZE);
    
	printf("\n\n%d records loaded!\n", total_rec);
	put_total_rec (total_rec);
	btclose();           //close b-tree file
 	inp_close();         //close the data input file
	close(fd_datafile);  //close the database file

}