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#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "igzip_lib.h"
#include "test.h"

#define BUF_SIZE 1024
#define MIN_TEST_LOOPS   100
#ifndef RUN_MEM_SIZE
# define RUN_MEM_SIZE 500000000
#endif

struct isal_zstream stream;

int get_filesize(FILE * f)
{
	int curr, end;

	curr = ftell(f);	/* Save current position */
	fseek(f, 0L, SEEK_END);
	end = ftell(f);
	fseek(f, curr, SEEK_SET);	/* Restore position */
	return end;
}

int main(int argc, char *argv[])
{
	FILE *in, *out = NULL;
	unsigned char *inbuf, *outbuf;
	int i, infile_size, iterations, outbuf_size;

	if (argc > 3 || argc < 2) {
		fprintf(stderr, "Usage: igzip_sync_flush_file_perf  infile [outfile]\n"
			"\t - Runs multiple iterations of igzip on a file to get more accurate time results.\n");
		exit(0);
	}
	in = fopen(argv[1], "rb");
	if (!in) {
		fprintf(stderr, "Can't open %s for reading\n", argv[1]);
		exit(0);
	}
	if (argc > 2) {
		out = fopen(argv[2], "wb");
		if (!out) {
			fprintf(stderr, "Can't open %s for writing\n", argv[2]);
			exit(0);
		}
		printf("outfile=%s\n", argv[2]);
	}
	printf("Window Size: %d K\n", IGZIP_HIST_SIZE / 1024);
	printf("igzip_sync_flush_file_perf: \n");
	fflush(0);
	/* Allocate space for entire input file and
	 * output (assuming 1:1 max output size)
	 */
	infile_size = get_filesize(in);

	if (infile_size != 0) {
		outbuf_size = infile_size;
		iterations = RUN_MEM_SIZE / infile_size;
	} else {
		outbuf_size = BUF_SIZE;
		iterations = MIN_TEST_LOOPS;
	}
	if (iterations < MIN_TEST_LOOPS)
		iterations = MIN_TEST_LOOPS;

	inbuf = malloc(infile_size);
	if (inbuf == NULL) {
		fprintf(stderr, "Can't allocate input buffer memory\n");
		exit(0);
	}
	outbuf = malloc(outbuf_size);
	if (outbuf == NULL) {
		fprintf(stderr, "Can't allocate output buffer memory\n");
		exit(0);
	}

	printf("igzip_sync_flush_file_perf: %s %d iterations\n", argv[1], iterations);
	/* Read complete input file into buffer */
	stream.avail_in = (uint32_t) fread(inbuf, 1, infile_size, in);
	if (stream.avail_in != infile_size) {
		fprintf(stderr, "Couldn't fit all of input file into buffer\n");
		exit(0);
	}

	struct perf start, stop;
	perf_start(&start);

	for (i = 0; i < iterations; i++) {
		isal_deflate_init(&stream);
		stream.end_of_stream = 0;
		stream.flush = SYNC_FLUSH;
		stream.next_in = inbuf;
		stream.avail_in = infile_size / 2;
		stream.next_out = outbuf;
		stream.avail_out = outbuf_size / 2;
		isal_deflate(&stream);
		if (infile_size == 0)
			continue;
		stream.avail_in = infile_size - infile_size / 2;
		stream.end_of_stream = 1;
		stream.next_in = inbuf + stream.total_in;
		stream.flush = SYNC_FLUSH;
		stream.avail_out = infile_size - outbuf_size / 2;
		stream.next_out = outbuf + stream.total_out;
		isal_deflate(&stream);
		if (stream.avail_in != 0)
			break;
	}
	perf_stop(&stop);

	if (stream.avail_in != 0) {
		fprintf(stderr, "Could not compress all of inbuf\n");
		exit(0);
	}

	printf("  file %s - in_size=%d out_size=%d iter=%d ratio=%3.1f%%\n", argv[1],
	       infile_size, stream.total_out, i, 100.0 * stream.total_out / infile_size);

	printf("igzip_file: ");
	perf_print(stop, start, (long long)infile_size * i);

	if (argc > 2 && out) {
		printf("writing %s\n", argv[2]);
		fwrite(outbuf, 1, stream.total_out, out);
		fclose(out);
	}

	fclose(in);
	printf("End of igzip_sync_flush_file_perf\n\n");
	fflush(0);
	return 0;
}