/*
 * librdkafka - Apache Kafka C library
 *
 * Copyright (c) 2012-2015, Magnus Edenhill
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "test.h"

/* Typical include path would be <librdkafka/rdkafka.h>, but this program
 * is built from within the librdkafka source tree and thus differs. */
#include "rdkafka.h"  /* for Kafka driver */


/**
 * #781: handle many (?) topics.
 */


const int msgs_per_topic = 100;


/**
 * Request offset for nonexisting partition.
 * Will cause rd_kafka_destroy() to hang.
 */



static void produce_many (char **topics, int topic_cnt, uint64_t testid) {
	rd_kafka_t *rk;
        test_timing_t t_rkt_create;
        int i;
	rd_kafka_topic_t **rkts;

	TEST_SAY(_C_MAG "%s\n" _C_CLR, __FUNCTION__);

	rk = test_create_producer();
	
	TEST_SAY("Creating %d topic objects\n", topic_cnt);
		 
	rkts = malloc(sizeof(*rkts) * topic_cnt);
	TIMING_START(&t_rkt_create, "Topic object create");
	for (i = 0 ; i < topic_cnt ; i++) {
		rkts[i] = test_create_topic_object(rk, topics[i], NULL);
	}
	TIMING_STOP(&t_rkt_create);

	TEST_SAY("Producing %d messages to each %d topics\n",
		 msgs_per_topic, topic_cnt);
        /* Produce messages to each topic (so they are created) */
	for (i = 0 ; i < topic_cnt ; i++) {
		test_produce_msgs(rk, rkts[i], testid, 0,
				  i * msgs_per_topic, msgs_per_topic,
				  NULL, 100);
	}

	TEST_SAY("Destroying %d topic objects\n", topic_cnt);
	for (i = 0 ; i < topic_cnt ; i++) {
		rd_kafka_topic_destroy(rkts[i]);
	}
	free(rkts);

	test_flush(rk, 30000);

	rd_kafka_destroy(rk);
}


static void legacy_consume_many (char **topics, int topic_cnt, uint64_t testid){
	rd_kafka_t *rk;
        test_timing_t t_rkt_create;
        int i;
	rd_kafka_topic_t **rkts;
	int msg_base = 0;

	TEST_SAY(_C_MAG "%s\n" _C_CLR, __FUNCTION__);

	test_conf_init(NULL, NULL, 60);

	rk = test_create_consumer(NULL, NULL, NULL, NULL, NULL);

	TEST_SAY("Creating %d topic objects\n", topic_cnt);
		 
	rkts = malloc(sizeof(*rkts) * topic_cnt);
	TIMING_START(&t_rkt_create, "Topic object create");
	for (i = 0 ; i < topic_cnt ; i++)
		rkts[i] = test_create_topic_object(rk, topics[i], NULL);
	TIMING_STOP(&t_rkt_create);

	TEST_SAY("Start consumer for %d topics\n", topic_cnt);
	for (i = 0 ; i < topic_cnt ; i++)
		test_consumer_start("legacy", rkts[i], 0,
				    RD_KAFKA_OFFSET_BEGINNING);
	
	TEST_SAY("Consuming from %d messages from each %d topics\n",
		 msgs_per_topic, topic_cnt);
	for (i = 0 ; i < topic_cnt ; i++) {
		test_consume_msgs("legacy", rkts[i], testid, 0, TEST_NO_SEEK,
				  msg_base, msgs_per_topic, 1);
		msg_base += msgs_per_topic;
	}

	TEST_SAY("Stopping consumers\n");
	for (i = 0 ; i < topic_cnt ; i++)
		test_consumer_stop("legacy", rkts[i], 0);


	TEST_SAY("Destroying %d topic objects\n", topic_cnt);
	for (i = 0 ; i < topic_cnt ; i++)
		rd_kafka_topic_destroy(rkts[i]);

	free(rkts);

	rd_kafka_destroy(rk);
}



static void subscribe_consume_many (char **topics, int topic_cnt,
				    uint64_t testid) {
	rd_kafka_t *rk;
        int i;
	rd_kafka_topic_conf_t *tconf;
	rd_kafka_topic_partition_list_t *parts;
	rd_kafka_resp_err_t err;
	test_msgver_t mv;

	TEST_SAY(_C_MAG "%s\n" _C_CLR, __FUNCTION__);

	test_conf_init(NULL, &tconf, 60);
	test_topic_conf_set(tconf, "auto.offset.reset", "earliest");
	rk = test_create_consumer(__FUNCTION__, NULL, NULL, tconf, NULL);

	parts = rd_kafka_topic_partition_list_new(topic_cnt);
	for (i = 0 ; i < topic_cnt ; i++)
		rd_kafka_topic_partition_list_add(parts, topics[i],
						  RD_KAFKA_PARTITION_UA);

	TEST_SAY("Subscribing to %d topics\n", topic_cnt);
	err = rd_kafka_subscribe(rk, parts);
	if (err)
		TEST_FAIL("subscribe() failed: %s\n", rd_kafka_err2str(err));

	rd_kafka_topic_partition_list_destroy(parts);

	test_msgver_init(&mv, testid);
	test_consumer_poll("consume.subscribe", rk, testid,
			   -1, 0, msgs_per_topic * topic_cnt, &mv);

	for (i = 0 ; i < topic_cnt ; i++)
		test_msgver_verify_part("subscribe", &mv, TEST_MSGVER_ALL_PART,
					topics[i], 0, i * msgs_per_topic,
					msgs_per_topic);
	test_msgver_clear(&mv);

	test_consumer_close(rk);

	rd_kafka_destroy(rk);
}



static void assign_consume_many (char **topics, int topic_cnt, uint64_t testid){
	rd_kafka_t *rk;
	rd_kafka_topic_partition_list_t *parts;
	int i;
	test_msgver_t mv;

	TEST_SAY(_C_MAG "%s\n" _C_CLR, __FUNCTION__);

	test_conf_init(NULL, NULL, 60);
	rk = test_create_consumer(__FUNCTION__, NULL, NULL, NULL, NULL);

	parts = rd_kafka_topic_partition_list_new(topic_cnt);
	for (i = 0 ; i < topic_cnt ; i++)
		rd_kafka_topic_partition_list_add(parts, topics[i], 0)->
			offset = RD_KAFKA_OFFSET_TAIL(msgs_per_topic);

	test_consumer_assign("consume.assign", rk, parts);
	rd_kafka_topic_partition_list_destroy(parts);

	test_msgver_init(&mv, testid);
	test_consumer_poll("consume.assign", rk, testid,
			   -1, 0, msgs_per_topic * topic_cnt, &mv);

	for (i = 0 ; i < topic_cnt ; i++)
		test_msgver_verify_part("assign", &mv, TEST_MSGVER_ALL_PART,
					topics[i], 0, i * msgs_per_topic,
					msgs_per_topic);
	test_msgver_clear(&mv);

	test_consumer_close(rk);

	rd_kafka_destroy(rk);
}



int main_0042_many_topics (int argc, char **argv) {
	char **topics;
	const int topic_cnt = 20; /* up this as needed, topic creation
				   * takes time so unless hunting a bug
				   * we keep this low to keep the
				   * test suite run time down. */
	uint64_t testid;
	int i;

	test_conf_init(NULL, NULL, 60);

	testid = test_id_generate();

	/* Generate unique topic names */
	topics = malloc(sizeof(*topics) * topic_cnt);
	for (i = 0 ; i < topic_cnt ; i++)
		topics[i] = rd_strdup(test_mk_topic_name(__FUNCTION__, 1));

	produce_many(topics, topic_cnt, testid);
	legacy_consume_many(topics, topic_cnt, testid);
	if (test_broker_version >= TEST_BRKVER(0,9,0,0)) {
		subscribe_consume_many(topics, topic_cnt, testid);
		assign_consume_many(topics, topic_cnt, testid);
	}

	for (i = 0 ; i < topic_cnt ; i++)
		free(topics[i]);
	free(topics);

        return 0;
}