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

#if defined(ZLIB_9) || defined(ZLIB_1) || defined(ZLIB_COMPARE)
# include <zlib.h>
#endif

#define BUF_SIZE 1024
#define MIN_TEST_LOOPS   8
#ifndef RUN_MEM_SIZE
# define RUN_MEM_SIZE 1000000000
#endif

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, *tempbuf;
	int i, infile_size, iterations, outbuf_size, check;
	uint64_t inbuf_size;
	struct inflate_state state;

	if (argc > 3 || argc < 2) {
		fprintf(stderr, "Usage: isal_inflate_file_perf  infile\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("isal_inflate_perf: \n");
	fflush(0);
	/* Allocate space for entire input file and output
	 * (assuming some possible expansion on output size)
	 */
	infile_size = get_filesize(in);

	if (infile_size != 0) {
		outbuf_size = infile_size;
		iterations = RUN_MEM_SIZE / infile_size;
	} else {
		printf("Error: input file has 0 size\n");
		exit(0);
	}
	if (iterations < MIN_TEST_LOOPS)
		iterations = MIN_TEST_LOOPS;

	tempbuf = malloc(infile_size);
	if (tempbuf == NULL) {
		fprintf(stderr, "Can't allocate temp buffer memory\n");
		exit(0);
	}
	inbuf_size = 2 * infile_size;
	inbuf = malloc(inbuf_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);
	}

	fread(tempbuf, 1, infile_size, in);

#ifdef ZLIB_9
	printf("Using zlib -9 compression\n");
	i = compress2(inbuf, &inbuf_size, tempbuf, infile_size, 9);
	if (i != Z_OK) {
		printf("Compression of input file failed\n");
		exit(0);
	}

	inbuf += 2;
	inbuf_size -= 2;
#elif defined(ZLIB_1)
	printf("Using zlib -1 compression\n");
	i = compress2(inbuf, &inbuf_size, tempbuf, infile_size, 1);
	if (i != Z_OK) {
		printf("Compression of input file failed\n");
		exit(0);
	}

	inbuf += 2;
	inbuf_size -= 2;
#else
	printf("Using igzip compression\n");
	struct isal_zstream stream;
	isal_deflate_init(&stream);
	stream.end_of_stream = 1;	/* Do the entire file at once */
	stream.flush = NO_FLUSH;
	stream.next_in = tempbuf;
	stream.avail_in = infile_size;
	stream.next_out = inbuf;
	stream.avail_out = inbuf_size;
#ifdef IGZIP_CUSTOM
	struct isal_huff_histogram histogram;
	struct isal_hufftables hufftables_custom;

	memset(&histogram, 0, sizeof(histogram));
	isal_update_histogram(tempbuf, infile_size, &histogram);
	isal_create_hufftables(&hufftables_custom, &histogram);
	stream.hufftables = &hufftables_custom;
#endif
	isal_deflate(&stream);
	if (stream.avail_in != 0) {
		printf("Compression of input file failed\n");
		exit(0);
	}
#endif

#ifdef ZLIB_COMPARE
	{
		printf("igzip_zlib_inflate_perf: %s %d iterations\n", argv[1], iterations);
		/* Read complete input file into buffer */

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

		z_stream gstream;

		for (i = 0; i < iterations; i++) {
			gstream.next_in = inbuf;
			gstream.avail_in = inbuf_size;
			gstream.zalloc = Z_NULL;
			gstream.zfree = Z_NULL;
			gstream.opaque = Z_NULL;
			if (0 != inflateInit2(&gstream, -15)) {
				printf("Fail zlib init\n");
				exit(-1);
			}
			gstream.next_out = outbuf;
			gstream.avail_out = outbuf_size;
			check = inflate(&gstream, Z_FINISH);
			if (check != 1) {
				printf("Error in decompression with error %d\n", check);
				break;
			}
		}
		perf_stop(&stop);
		printf("  file %s - in_size=%d out_size=%lu iter=%d\n", argv[1],
		       infile_size, gstream.total_out, i);

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

		printf("End of igzip_zlib_inflate_perf\n\n");
	}
#endif
	printf("isal_inflate_stateless_perf: %s %d iterations\n", argv[1], iterations);
	/* Read complete input file into buffer */
	fclose(in);
	struct perf start, stop;
	perf_start(&start);

	for (i = 0; i < iterations; i++) {
		isal_inflate_init(&state);
		state.next_in = inbuf;
		state.avail_in = inbuf_size;
		state.next_out = outbuf;
		state.avail_out = outbuf_size;

		check = isal_inflate(&state);
		if (check) {
			printf("Error in decompression with error %d\n", check);
			break;
		}
	}
	perf_stop(&stop);
	printf("  file %s - in_size=%d out_size=%d iter=%d\n", argv[1],
	       infile_size, state.total_out, i);

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

	printf("End of isal_inflate_stateless_perf\n\n");
	fflush(0);

#if defined(ZLIB_1) || defined(ZLIB_9)
	inbuf -= 2;
#endif
	free(inbuf);
	free(outbuf);
	free(tempbuf);

	return 0;
}