package redis.clients.jedis.tests;

import java.io.UnsupportedEncodingException;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.UUID;

import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

import redis.clients.jedis.HostAndPort;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.Pipeline;
import redis.clients.jedis.Response;
import redis.clients.jedis.Tuple;
import redis.clients.jedis.exceptions.JedisDataException;

public class PipeliningTest extends Assert {
    private static HostAndPort hnp = HostAndPortUtil.getRedisServers().get(0);

    private Jedis jedis;

    @Before
    public void setUp() throws Exception {
	jedis = new Jedis(hnp.getHost(), hnp.getPort(), 500);
	jedis.connect();
	jedis.auth("foobared");
	jedis.flushAll();
    }

    @Test
    public void pipeline() throws UnsupportedEncodingException {
	Pipeline p = jedis.pipelined();
	p.set("foo", "bar");
	p.get("foo");
	List<Object> results = p.syncAndReturnAll();

	assertEquals(2, results.size());
	assertEquals("OK", results.get(0));
	assertEquals("bar", results.get(1));

    }

    @Test
    public void pipelineResponse() {
	jedis.set("string", "foo");
	jedis.lpush("list", "foo");
	jedis.hset("hash", "foo", "bar");
	jedis.zadd("zset", 1, "foo");
	jedis.sadd("set", "foo");

	Pipeline p = jedis.pipelined();
	Response<String> string = p.get("string");
	Response<String> list = p.lpop("list");
	Response<String> hash = p.hget("hash", "foo");
	Response<Set<String>> zset = p.zrange("zset", 0, -1);
	Response<String> set = p.spop("set");
	Response<Boolean> blist = p.exists("list");
	Response<Double> zincrby = p.zincrby("zset", 1, "foo");
	Response<Long> zcard = p.zcard("zset");
	p.lpush("list", "bar");
	Response<List<String>> lrange = p.lrange("list", 0, -1);
	Response<Map<String, String>> hgetAll = p.hgetAll("hash");
	p.sadd("set", "foo");
	Response<Set<String>> smembers = p.smembers("set");
	Response<Set<Tuple>> zrangeWithScores = p.zrangeWithScores("zset", 0,
		-1);
	p.sync();

	assertEquals("foo", string.get());
	assertEquals("foo", list.get());
	assertEquals("bar", hash.get());
	assertEquals("foo", zset.get().iterator().next());
	assertEquals("foo", set.get());
	assertEquals(false, blist.get());
	assertEquals(Double.valueOf(2), zincrby.get());
	assertEquals(Long.valueOf(1), zcard.get());
	assertEquals(1, lrange.get().size());
	assertNotNull(hgetAll.get().get("foo"));
	assertEquals(1, smembers.get().size());
	assertEquals(1, zrangeWithScores.get().size());
    }

    @Test
    public void pipelineResponseWithData() {
	jedis.zadd("zset", 1, "foo");

	Pipeline p = jedis.pipelined();
	Response<Double> score = p.zscore("zset", "foo");
	p.sync();

	assertNotNull(score.get());
    }

    @Test
    public void pipelineBinarySafeHashCommands() {
	jedis.hset("key".getBytes(), "f1".getBytes(), "v111".getBytes());
	jedis.hset("key".getBytes(), "f22".getBytes(), "v2222".getBytes());

	Pipeline p = jedis.pipelined();
	Response<Map<byte[], byte[]>> fmap = p.hgetAll("key".getBytes());
	Response<Set<byte[]>> fkeys = p.hkeys("key".getBytes());
	Response<List<byte[]>> fordered = p.hmget("key".getBytes(),
		"f22".getBytes(), "f1".getBytes());
	Response<List<byte[]>> fvals = p.hvals("key".getBytes());
	p.sync();

	assertNotNull(fmap.get());
	// we have to do these strange contortions because byte[] is not a very
	// good key
	// for a java Map. It only works with equality (you need the exact key
	// object to retrieve
	// the value) I recommend we switch to using ByteBuffer or something
	// similar:
	// http://stackoverflow.com/questions/1058149/using-a-byte-array-as-hashmap-key-java
	Map<byte[], byte[]> map = fmap.get();
	Set<byte[]> mapKeys = map.keySet();
	Iterator<byte[]> iterMap = mapKeys.iterator();
	byte[] firstMapKey = iterMap.next();
	byte[] secondMapKey = iterMap.next();
	assertFalse(iterMap.hasNext());
	verifyHasBothValues(firstMapKey, secondMapKey, "f1".getBytes(),
		"f22".getBytes());
	byte[] firstMapValue = map.get(firstMapKey);
	byte[] secondMapValue = map.get(secondMapKey);
	verifyHasBothValues(firstMapValue, secondMapValue, "v111".getBytes(),
		"v2222".getBytes());

	assertNotNull(fkeys.get());
	Iterator<byte[]> iter = fkeys.get().iterator();
	byte[] firstKey = iter.next();
	byte[] secondKey = iter.next();
	assertFalse(iter.hasNext());
	verifyHasBothValues(firstKey, secondKey, "f1".getBytes(),
		"f22".getBytes());

	assertNotNull(fordered.get());
	assertArrayEquals("v2222".getBytes(), fordered.get().get(0));
	assertArrayEquals("v111".getBytes(), fordered.get().get(1));

	assertNotNull(fvals.get());
	assertEquals(2, fvals.get().size());
	byte[] firstValue = fvals.get().get(0);
	byte[] secondValue = fvals.get().get(1);
	verifyHasBothValues(firstValue, secondValue, "v111".getBytes(),
		"v2222".getBytes());
    }

    private void verifyHasBothValues(byte[] firstKey, byte[] secondKey,
	    byte[] value1, byte[] value2) {
	assertFalse(Arrays.equals(firstKey, secondKey));
	assertTrue(Arrays.equals(firstKey, value1)
		|| Arrays.equals(firstKey, value2));
	assertTrue(Arrays.equals(secondKey, value1)
		|| Arrays.equals(secondKey, value2));
    }

    @Test
    public void pipelineSelect() {
	Pipeline p = jedis.pipelined();
	p.select(1);
	p.sync();
    }

    @Test
    public void pipelineResponseWithoutData() {
	jedis.zadd("zset", 1, "foo");

	Pipeline p = jedis.pipelined();
	Response<Double> score = p.zscore("zset", "bar");
	p.sync();

	assertNull(score.get());
    }

    @Test(expected = JedisDataException.class)
    public void pipelineResponseWithinPipeline() {
	jedis.set("string", "foo");

	Pipeline p = jedis.pipelined();
	Response<String> string = p.get("string");
	string.get();
	p.sync();
    }

    @Test
    public void pipelineWithPubSub() {
	Pipeline pipelined = jedis.pipelined();
	Response<Long> p1 = pipelined.publish("foo", "bar");
	Response<Long> p2 = pipelined.publish("foo".getBytes(),
		"bar".getBytes());
	pipelined.sync();
	assertEquals(0, p1.get().longValue());
	assertEquals(0, p2.get().longValue());
    }

    @Test
    public void canRetrieveUnsetKey() {
	Pipeline p = jedis.pipelined();
	Response<String> shouldNotExist = p.get(UUID.randomUUID().toString());
	p.sync();
	assertNull(shouldNotExist.get());
    }

    @Test
    public void piplineWithError() {
	Pipeline p = jedis.pipelined();
	p.set("foo", "bar");
	Response<Set<String>> error = p.smembers("foo");
	Response<String> r = p.get("foo");
	p.sync();
	try {
	    error.get();
	    fail();
	} catch (JedisDataException e) {
	    // that is fine we should be here
	}
	assertEquals(r.get(), "bar");
    }

    @Test
    public void multi() {
	Pipeline p = jedis.pipelined();
	p.multi();
	Response<Long> r1 = p.hincrBy("a", "f1", -1);
	Response<Long> r2 = p.hincrBy("a", "f1", -2);
	Response<List<Object>> r3 = p.exec();
	List<Object> result = p.syncAndReturnAll();

	assertEquals(new Long(-1), r1.get());
	assertEquals(new Long(-3), r2.get());

	assertEquals(4, result.size());

	assertEquals("OK", result.get(0));
	assertEquals("QUEUED", result.get(1));
	assertEquals("QUEUED", result.get(2));

	// 4th result is a list with the results from the multi
	@SuppressWarnings("unchecked")
	List<Object> multiResult = (List<Object>) result.get(3);
	assertEquals(new Long(-1), multiResult.get(0));
	assertEquals(new Long(-3), multiResult.get(1));

	assertEquals(new Long(-1), r3.get().get(0));
	assertEquals(new Long(-3), r3.get().get(1));

    }

    @Test
    public void multiWithSync() {
	jedis.set("foo", "314");
	jedis.set("bar", "foo");
	jedis.set("hello", "world");
	Pipeline p = jedis.pipelined();
	Response<String> r1 = p.get("bar");
	p.multi();
	Response<String> r2 = p.get("foo");
	p.exec();
	Response<String> r3 = p.get("hello");
	p.sync();
	
	// before multi
	assertEquals("foo", r1.get());
	// It should be readable whether exec's response was built or not
	assertEquals("314", r2.get());
	// after multi
	assertEquals("world", r3.get());
    }

    @Test(expected = JedisDataException.class)
    public void pipelineExecShoudThrowJedisDataExceptionWhenNotInMulti() {
	Pipeline pipeline = jedis.pipelined();
	pipeline.exec();
    }

    @Test(expected = JedisDataException.class)
    public void pipelineDiscardShoudThrowJedisDataExceptionWhenNotInMulti() {
	Pipeline pipeline = jedis.pipelined();
	pipeline.discard();
    }

    @Test(expected = JedisDataException.class)
    public void pipelineMultiShoudThrowJedisDataExceptionWhenAlreadyInMulti() {
	Pipeline pipeline = jedis.pipelined();
	pipeline.multi();
	pipeline.set("foo", "3");
	pipeline.multi();
    }

    @Test
    public void testDiscardInPipeline() {
	Pipeline pipeline = jedis.pipelined();
	pipeline.multi();
	pipeline.set("foo", "bar");
	Response<String> discard = pipeline.discard();
	Response<String> get = pipeline.get("foo");
	pipeline.sync();
	discard.get();
	get.get();
    }

    @Test
    public void testEval() {
	String script = "return 'success!'";

	Pipeline p = jedis.pipelined();
	Response<String> result = p.eval(script);
	p.sync();

	assertEquals("success!", result.get());
    }

    @Test
    public void testEvalKeyAndArg() {
	String key = "test";
	String arg = "3";
	String script = "redis.call('INCRBY', KEYS[1], ARGV[1]) redis.call('INCRBY', KEYS[1], ARGV[1])";

	Pipeline p = jedis.pipelined();
	p.set(key, "0");
	Response<String> result0 = p.eval(script, Arrays.asList(key),
		Arrays.asList(arg));
	p.incr(key);
	Response<String> result1 = p.eval(script, Arrays.asList(key),
		Arrays.asList(arg));
	Response<String> result2 = p.get(key);
	p.sync();

	assertNull(result0.get());
	assertNull(result1.get());
	assertEquals("13", result2.get());
    }

    @Test
    public void testEvalsha() {
	String script = "return 'success!'";
	String sha1 = jedis.scriptLoad(script);

	assertTrue(jedis.scriptExists(sha1));

	Pipeline p = jedis.pipelined();
	Response<String> result = p.evalsha(sha1);
	p.sync();

	assertEquals("success!", result.get());
    }

    @Test
    public void testEvalshaKeyAndArg() {
	String key = "test";
	String arg = "3";
	String script = "redis.call('INCRBY', KEYS[1], ARGV[1]) redis.call('INCRBY', KEYS[1], ARGV[1])";
	String sha1 = jedis.scriptLoad(script);

	assertTrue(jedis.scriptExists(sha1));

	Pipeline p = jedis.pipelined();
	p.set(key, "0");
	Response<String> result0 = p.evalsha(sha1, Arrays.asList(key),
		Arrays.asList(arg));
	p.incr(key);
	Response<String> result1 = p.evalsha(sha1, Arrays.asList(key),
		Arrays.asList(arg));
	Response<String> result2 = p.get(key);
	p.sync();

	assertNull(result0.get());
	assertNull(result1.get());
	assertEquals("13", result2.get());
    }
}