package libnetwork

import (
	"fmt"
	"io/ioutil"
	"os"
	"testing"
	"time"

	"github.com/docker/libkv/store"
	"github.com/docker/libnetwork/config"
	"github.com/docker/libnetwork/datastore"
	"github.com/docker/libnetwork/netlabel"
	"github.com/docker/libnetwork/options"
)

func TestZooKeeperBackend(t *testing.T) {
	c, err := testNewController(t, "zk", "127.0.0.1:2181")
	if err != nil {
		t.Fatal(err)
	}
	c.Stop()
}

func testNewController(t *testing.T, provider, url string) (NetworkController, error) {
	cfgOptions, err := OptionBoltdbWithRandomDBFile()
	if err != nil {
		return nil, err
	}
	cfgOptions = append(cfgOptions, config.OptionKVProvider(provider))
	cfgOptions = append(cfgOptions, config.OptionKVProviderURL(url))
	return New(cfgOptions...)
}

func TestBoltdbBackend(t *testing.T) {
	defer os.Remove(datastore.DefaultScopes("")[datastore.LocalScope].Client.Address)
	testLocalBackend(t, "", "", nil)
	defer os.Remove("/tmp/boltdb.db")
	config := &store.Config{Bucket: "testBackend", ConnectionTimeout: 3 * time.Second}
	testLocalBackend(t, "boltdb", "/tmp/boltdb.db", config)

}

func testLocalBackend(t *testing.T, provider, url string, storeConfig *store.Config) {
	cfgOptions := []config.Option{}
	if provider != "" {
		cfgOptions = append(cfgOptions, config.OptionLocalKVProvider(provider))
	}

	if url != "" {
		cfgOptions = append(cfgOptions, config.OptionLocalKVProviderURL(url))
	}

	if storeConfig != nil {
		cfgOptions = append(cfgOptions, config.OptionLocalKVProviderConfig(storeConfig))
	}

	driverOptions := options.Generic{}
	genericOption := make(map[string]interface{})
	genericOption[netlabel.GenericData] = driverOptions
	cfgOptions = append(cfgOptions, config.OptionDriverConfig("host", genericOption))

	ctrl, err := New(cfgOptions...)
	if err != nil {
		t.Fatalf("Error new controller: %v", err)
	}
	nw, err := ctrl.NewNetwork("host", "host")
	if err != nil {
		t.Fatalf("Error creating default \"host\" network: %v", err)
	}
	ep, err := nw.CreateEndpoint("newendpoint", []EndpointOption{}...)
	if err != nil {
		t.Fatalf("Error creating endpoint: %v", err)
	}
	store := ctrl.(*controller).getStore(datastore.LocalScope).KVStore()
	if exists, err := store.Exists(datastore.Key(datastore.NetworkKeyPrefix, string(nw.ID()))); !exists || err != nil {
		t.Fatalf("Network key should have been created.")
	}
	if exists, err := store.Exists(datastore.Key([]string{datastore.EndpointKeyPrefix, string(nw.ID()), string(ep.ID())}...)); exists || err != nil {
		t.Fatalf("Endpoint key shouldn't have been created.")
	}
	ctrl.(*controller).getStore(datastore.LocalScope).Close()

	// test restore of local store
	ctrl, err = New(cfgOptions...)
	if err != nil {
		t.Fatalf("Error creating controller: %v", err)
	}
	if _, err = ctrl.NetworkByID(nw.ID()); err != nil {
		t.Fatalf("Error getting network %v", err)
	}
}

func TestNoPersist(t *testing.T) {
	cfgOptions, err := OptionBoltdbWithRandomDBFile()
	if err != nil {
		t.Fatalf("Error creating random boltdb file : %v", err)
	}
	ctrl, err := New(cfgOptions...)
	if err != nil {
		t.Fatalf("Error new controller: %v", err)
	}
	nw, err := ctrl.NewNetwork("host", "host", NetworkOptionPersist(false))
	if err != nil {
		t.Fatalf("Error creating default \"host\" network: %v", err)
	}
	ep, err := nw.CreateEndpoint("newendpoint", []EndpointOption{}...)
	if err != nil {
		t.Fatalf("Error creating endpoint: %v", err)
	}
	store := ctrl.(*controller).getStore(datastore.LocalScope).KVStore()
	if exists, _ := store.Exists(datastore.Key(datastore.NetworkKeyPrefix, string(nw.ID()))); exists {
		t.Fatalf("Network with persist=false should not be stored in KV Store")
	}
	if exists, _ := store.Exists(datastore.Key([]string{datastore.EndpointKeyPrefix, string(nw.ID()), string(ep.ID())}...)); exists {
		t.Fatalf("Endpoint in Network with persist=false should not be stored in KV Store")
	}
	store.Close()
}

// OptionBoltdbWithRandomDBFile function returns a random dir for local store backend
func OptionBoltdbWithRandomDBFile() ([]config.Option, error) {
	tmp, err := ioutil.TempFile("", "libnetwork-")
	if err != nil {
		return nil, fmt.Errorf("Error creating temp file: %v", err)
	}
	if err := tmp.Close(); err != nil {
		return nil, fmt.Errorf("Error closing temp file: %v", err)
	}
	cfgOptions := []config.Option{}
	cfgOptions = append(cfgOptions, config.OptionLocalKVProvider("boltdb"))
	cfgOptions = append(cfgOptions, config.OptionLocalKVProviderURL(tmp.Name()))
	sCfg := &store.Config{Bucket: "testBackend", ConnectionTimeout: 3 * time.Second}
	cfgOptions = append(cfgOptions, config.OptionLocalKVProviderConfig(sCfg))
	return cfgOptions, nil
}

func TestLocalStoreLockTimeout(t *testing.T) {
	cfgOptions, err := OptionBoltdbWithRandomDBFile()
	if err != nil {
		t.Fatalf("Error getting random boltdb configs %v", err)
	}
	ctrl1, err := New(cfgOptions...)
	if err != nil {
		t.Fatalf("Error new controller: %v", err)
	}
	defer ctrl1.Stop()
	// Use the same boltdb file without closing the previous controller
	// with a slightly altered configuration
	sCfg := &store.Config{Bucket: "testBackend", ConnectionTimeout: 1 * time.Second}
	_, err = New(append(cfgOptions[:len(cfgOptions)-1],
		config.OptionLocalKVProviderConfig(sCfg))...)
	if err == nil {
		t.Fatalf("Expected to fail but succeeded")
	}
}