package gocql

import (
	"flag"
	"fmt"
	"log"
	"strings"
	"sync"
	"testing"
	"time"
)

var (
	flagCluster      = flag.String("cluster", "127.0.0.1", "a comma-separated list of host:port tuples")
	flagProto        = flag.Int("proto", 2, "protcol version")
	flagCQL          = flag.String("cql", "3.0.0", "CQL version")
	flagRF           = flag.Int("rf", 1, "replication factor for test keyspace")
	clusterSize      = flag.Int("clusterSize", 1, "the expected size of the cluster")
	flagRetry        = flag.Int("retries", 5, "number of times to retry queries")
	flagAutoWait     = flag.Duration("autowait", 1000*time.Millisecond, "time to wait for autodiscovery to fill the hosts poll")
	flagRunSslTest   = flag.Bool("runssl", false, "Set to true to run ssl test")
	flagRunAuthTest  = flag.Bool("runauth", false, "Set to true to run authentication test")
	flagCompressTest = flag.String("compressor", "", "compressor to use")
	flagTimeout      = flag.Duration("gocql.timeout", 5*time.Second, "sets the connection `timeout` for all operations")
	clusterHosts     []string
)

func init() {
	flag.Parse()
	clusterHosts = strings.Split(*flagCluster, ",")
	log.SetFlags(log.Lshortfile | log.LstdFlags)
}

func addSslOptions(cluster *ClusterConfig) *ClusterConfig {
	if *flagRunSslTest {
		cluster.SslOpts = &SslOptions{
			CertPath:               "testdata/pki/gocql.crt",
			KeyPath:                "testdata/pki/gocql.key",
			CaPath:                 "testdata/pki/ca.crt",
			EnableHostVerification: false,
		}
	}
	return cluster
}

var initOnce sync.Once

func createTable(s *Session, table string) error {
	if err := s.control.query(table).Close(); err != nil {
		return err
	}

	if err := s.control.awaitSchemaAgreement(); err != nil {
		return err
	}

	return nil
}

func createCluster() *ClusterConfig {
	cluster := NewCluster(clusterHosts...)
	cluster.ProtoVersion = *flagProto
	cluster.CQLVersion = *flagCQL
	cluster.Timeout = *flagTimeout
	cluster.Consistency = Quorum
	cluster.MaxWaitSchemaAgreement = 2 * time.Minute // travis might be slow
	if *flagRetry > 0 {
		cluster.RetryPolicy = &SimpleRetryPolicy{NumRetries: *flagRetry}
	}

	switch *flagCompressTest {
	case "snappy":
		cluster.Compressor = &SnappyCompressor{}
	case "":
	default:
		panic("invalid compressor: " + *flagCompressTest)
	}

	cluster = addSslOptions(cluster)
	return cluster
}

func createKeyspace(tb testing.TB, cluster *ClusterConfig, keyspace string) {
	c := *cluster
	c.Keyspace = "system"
	c.Timeout = 20 * time.Second
	session, err := c.CreateSession()
	if err != nil {
		tb.Fatal("createSession:", err)
	}
	defer session.Close()
	defer log.Println("closing keyspace session")

	err = session.control.query(`DROP KEYSPACE IF EXISTS ` + keyspace).Close()
	if err != nil {
		tb.Fatal(err)
	}

	err = session.control.query(fmt.Sprintf(`CREATE KEYSPACE %s
	WITH replication = {
		'class' : 'SimpleStrategy',
		'replication_factor' : %d
	}`, keyspace, *flagRF)).Close()

	if err != nil {
		tb.Fatal(err)
	}

	// lets just be sure
	if err := session.control.awaitSchemaAgreement(); err != nil {
		tb.Fatal(err)
	}
}

func createSessionFromCluster(cluster *ClusterConfig, tb testing.TB) *Session {
	// Drop and re-create the keyspace once. Different tests should use their own
	// individual tables, but can assume that the table does not exist before.
	initOnce.Do(func() {
		createKeyspace(tb, cluster, "gocql_test")
	})

	cluster.Keyspace = "gocql_test"
	session, err := cluster.CreateSession()
	if err != nil {
		tb.Fatal("createSession:", err)
	}

	return session
}

func createSession(tb testing.TB) *Session {
	cluster := createCluster()
	return createSessionFromCluster(cluster, tb)
}