package server

import (
	"github.com/stretchr/testify/require"
	"testing"
	"time"

	"github.com/rs/xid"
	"github.com/stretchr/testify/assert"
	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"

	nbgroup "github.com/netbirdio/netbird/management/server/group"
	nbpeer "github.com/netbirdio/netbird/management/server/peer"
)

func TestPeer_LoginExpired(t *testing.T) {
	tt := []struct {
		name              string
		expirationEnabled bool
		lastLogin         time.Time
		expected          bool
		accountSettings   *Settings
	}{
		{
			name:              "Peer Login Expiration Disabled. Peer Login Should Not Expire",
			expirationEnabled: false,
			lastLogin:         time.Now().UTC().Add(-25 * time.Hour),
			accountSettings: &Settings{
				PeerLoginExpirationEnabled: true,
				PeerLoginExpiration:        time.Hour,
			},
			expected: false,
		},
		{
			name:              "Peer Login Should Expire",
			expirationEnabled: true,
			lastLogin:         time.Now().UTC().Add(-25 * time.Hour),
			accountSettings: &Settings{
				PeerLoginExpirationEnabled: true,
				PeerLoginExpiration:        time.Hour,
			},
			expected: true,
		},
		{
			name:              "Peer Login Should Not Expire",
			expirationEnabled: true,
			lastLogin:         time.Now().UTC(),
			accountSettings: &Settings{
				PeerLoginExpirationEnabled: true,
				PeerLoginExpiration:        time.Hour,
			},
			expected: false,
		},
	}

	for _, c := range tt {
		t.Run(c.name, func(t *testing.T) {
			peer := &nbpeer.Peer{
				LoginExpirationEnabled: c.expirationEnabled,
				LastLogin:              c.lastLogin,
				UserID:                 userID,
			}

			expired, _ := peer.LoginExpired(c.accountSettings.PeerLoginExpiration)
			assert.Equal(t, expired, c.expected)
		})
	}
}

func TestAccountManager_GetNetworkMap(t *testing.T) {
	manager, err := createManager(t)
	if err != nil {
		t.Fatal(err)
		return
	}

	expectedId := "test_account"
	userId := "account_creator"
	account, err := createAccount(manager, expectedId, userId, "")
	if err != nil {
		t.Fatal(err)
	}

	setupKey, err := manager.CreateSetupKey(account.Id, "test-key", SetupKeyReusable, time.Hour, nil, 999, userId, false)
	if err != nil {
		t.Fatal("error creating setup key")
		return
	}

	peerKey1, err := wgtypes.GeneratePrivateKey()
	if err != nil {
		t.Fatal(err)
		return
	}

	peer1, _, err := manager.AddPeer(setupKey.Key, "", &nbpeer.Peer{
		Key:  peerKey1.PublicKey().String(),
		Meta: nbpeer.PeerSystemMeta{Hostname: "test-peer-1"},
	})
	if err != nil {
		t.Errorf("expecting peer to be added, got failure %v", err)
		return
	}

	peerKey2, err := wgtypes.GeneratePrivateKey()
	if err != nil {
		t.Fatal(err)
		return
	}
	_, _, err = manager.AddPeer(setupKey.Key, "", &nbpeer.Peer{
		Key:  peerKey2.PublicKey().String(),
		Meta: nbpeer.PeerSystemMeta{Hostname: "test-peer-2"},
	})

	if err != nil {
		t.Errorf("expecting peer to be added, got failure %v", err)
		return
	}

	networkMap, err := manager.GetNetworkMap(peer1.ID)
	if err != nil {
		t.Fatal(err)
		return
	}

	if len(networkMap.Peers) != 1 {
		t.Errorf("expecting Account NetworkMap to have 1 peers, got %v", len(networkMap.Peers))
		return
	}

	if networkMap.Peers[0].Key != peerKey2.PublicKey().String() {
		t.Errorf(
			"expecting Account NetworkMap to have peer with a key %s, got %s",
			peerKey2.PublicKey().String(),
			networkMap.Peers[0].Key,
		)
	}
}

func TestDefaultAccountManager_DeterminePeerV6(t *testing.T) {
	manager, err := createManager(t)
	if err != nil {
		t.Fatal(err)
		return
	}

	expectedId := "test_account"
	userId := "account_creator"
	account, err := createAccount(manager, expectedId, userId, "")
	if err != nil {
		t.Fatal(err)
	}

	setupKey, err := manager.CreateSetupKey(account.Id, "test-key", SetupKeyReusable, time.Hour, nil, 999, userId, false)
	if err != nil {
		t.Fatal("error creating setup key")
		return
	}

	peerKey1, err := wgtypes.GeneratePrivateKey()
	if err != nil {
		t.Fatal(err)
		return
	}

	peer1, _, err := manager.AddPeer(setupKey.Key, "", &nbpeer.Peer{
		Key: peerKey1.PublicKey().String(),
		Meta: nbpeer.PeerSystemMeta{
			Hostname:      "test-peer-1",
			Ipv6Supported: true,
		},
	})
	if err != nil {
		t.Errorf("expecting peer to be added, got failure %v", err)
		return
	}

	peerKey2, err := wgtypes.GeneratePrivateKey()
	if err != nil {
		t.Fatal(err)
		return
	}

	peer2, _, err := manager.AddPeer(setupKey.Key, "", &nbpeer.Peer{
		Key: peerKey2.PublicKey().String(),
		Meta: nbpeer.PeerSystemMeta{
			Hostname:      "test-peer-2",
			Ipv6Supported: false,
		},
	})

	if err != nil {
		t.Errorf("expecting peer to be added, got failure %v", err)
		return
	}

	account, err = manager.Store.GetAccount(account.Id)
	require.NoError(t, err, "unable to fetch updated account")

	// Check if automatic setting defaults to "false".
	// (Other tests for interactions between the automatic setting and group/route memberships are already covered in
	// group_test.go and route_test.go)
	_, err = manager.DeterminePeerV6(account, peer1)
	require.NoError(t, err, "unable to determine effective peer IPv6 status")
	_, err = manager.DeterminePeerV6(account, peer2)
	require.NoError(t, err, "unable to determine effective peer IPv6 status")
	require.Nil(t, peer1.IP6, "peer1 IPv6 address did not default to nil.")
	require.Nil(t, peer1.IP6, "peer2 IPv6 address did not default to nil.")

	peer1.V6Setting = nbpeer.V6Disabled
	peer2.V6Setting = nbpeer.V6Disabled
	_, err = manager.DeterminePeerV6(account, peer1)
	require.NoError(t, err, "unable to determine effective peer IPv6 status")
	_, err = manager.DeterminePeerV6(account, peer2)
	require.NoError(t, err, "unable to determine effective peer IPv6 status")
	require.Nil(t, peer1.IP6, "peer1 IPv6 address is not nil even though it is force disabled.")
	require.Nil(t, peer2.IP6, "peer2 IPv6 address is not nil even though it is force disabled and unsupported.")

	peer1.V6Setting = nbpeer.V6Enabled
	peer2.V6Setting = nbpeer.V6Enabled
	_, err = manager.DeterminePeerV6(account, peer1)
	require.NoError(t, err, "unable to determine effective peer IPv6 status")
	_, err = manager.DeterminePeerV6(account, peer2)
	require.Error(t, err, "determining peer2 IPv6 address should fail as it is force enabled, but unsupported.")
	require.NotNil(t, peer1.IP6, "peer1 IPv6 address is nil even though it is force enabled.")
	require.Nil(t, peer2.IP6, "peer2 IPv6 address is not nil even though it is unsupported.")

	// Test whether disabling IPv6 will disable IPv6 routes.
	allGroup, err := account.GetGroupAll()
	require.NoError(t, err, "unable to retrieve all group")
	route, err := manager.CreateRoute(account.Id, "2001:db8:2345:6789::/64", peer1.ID, make([]string, 0), "testroute", "testnet", false, 9999, []string{allGroup.ID}, true, userID)
	require.NoError(t, err, "unable to create test IPv6 route")
	require.True(t, route.Enabled, "created IPv6 test route should be enabled")

	peer1.V6Setting = nbpeer.V6Disabled
	_, err = manager.UpdatePeer(account.Id, userID, peer1)
	require.NoError(t, err, "unable to update peer")

	account, err = manager.Store.GetAccount(account.Id)
	require.NoError(t, err, "unable to fetch updated account")

	route = account.Routes[route.ID]
	require.False(t, route.Enabled, "disabling IPv6 for a peer should disable all of its IPv6 routes.")
}

func TestAccountManager_GetNetworkMapWithPolicy(t *testing.T) {
	// TODO: disable until we start use policy again
	t.Skip()
	manager, err := createManager(t)
	if err != nil {
		t.Fatal(err)
		return
	}

	expectedID := "test_account"
	userID := "account_creator"
	account, err := createAccount(manager, expectedID, userID, "")
	if err != nil {
		t.Fatal(err)
	}

	var setupKey *SetupKey
	for _, key := range account.SetupKeys {
		if key.Type == SetupKeyReusable {
			setupKey = key
		}
	}

	peerKey1, err := wgtypes.GeneratePrivateKey()
	if err != nil {
		t.Fatal(err)
		return
	}

	peer1, _, err := manager.AddPeer(setupKey.Key, "", &nbpeer.Peer{
		Key:  peerKey1.PublicKey().String(),
		Meta: nbpeer.PeerSystemMeta{Hostname: "test-peer-1"},
	})
	if err != nil {
		t.Errorf("expecting peer to be added, got failure %v", err)
		return
	}

	peerKey2, err := wgtypes.GeneratePrivateKey()
	if err != nil {
		t.Fatal(err)
		return
	}
	peer2, _, err := manager.AddPeer(setupKey.Key, "", &nbpeer.Peer{
		Key:  peerKey2.PublicKey().String(),
		Meta: nbpeer.PeerSystemMeta{Hostname: "test-peer-2"},
	})
	if err != nil {
		t.Errorf("expecting peer to be added, got failure %v", err)
		return
	}

	policies, err := manager.ListPolicies(account.Id, userID)
	if err != nil {
		t.Errorf("expecting to get a list of rules, got failure %v", err)
		return
	}

	err = manager.DeletePolicy(account.Id, policies[0].ID, userID)
	if err != nil {
		t.Errorf("expecting to delete 1 group, got failure %v", err)
		return
	}
	var (
		group1 nbgroup.Group
		group2 nbgroup.Group
		policy Policy
	)

	group1.ID = xid.New().String()
	group2.ID = xid.New().String()
	group1.Name = "src"
	group2.Name = "dst"
	policy.ID = xid.New().String()
	group1.Peers = append(group1.Peers, peer1.ID)
	group2.Peers = append(group2.Peers, peer2.ID)

	err = manager.SaveGroup(account.Id, userID, &group1)
	if err != nil {
		t.Errorf("expecting group1 to be added, got failure %v", err)
		return
	}
	err = manager.SaveGroup(account.Id, userID, &group2)
	if err != nil {
		t.Errorf("expecting group2 to be added, got failure %v", err)
		return
	}

	policy.Name = "test"
	policy.Enabled = true
	policy.Rules = []*PolicyRule{
		{
			Enabled:       true,
			Sources:       []string{group1.ID},
			Destinations:  []string{group2.ID},
			Bidirectional: true,
			Action:        PolicyTrafficActionAccept,
		},
	}
	err = manager.SavePolicy(account.Id, userID, &policy)
	if err != nil {
		t.Errorf("expecting rule to be added, got failure %v", err)
		return
	}

	networkMap1, err := manager.GetNetworkMap(peer1.ID)
	if err != nil {
		t.Fatal(err)
		return
	}

	if len(networkMap1.Peers) != 1 {
		t.Errorf(
			"expecting Account NetworkMap to have 1 peers, got %v: %v",
			len(networkMap1.Peers),
			networkMap1.Peers,
		)
		return
	}

	if networkMap1.Peers[0].Key != peerKey2.PublicKey().String() {
		t.Errorf(
			"expecting Account NetworkMap to have peer with a key %s, got %s",
			peerKey2.PublicKey().String(),
			networkMap1.Peers[0].Key,
		)
	}

	networkMap2, err := manager.GetNetworkMap(peer2.ID)
	if err != nil {
		t.Fatal(err)
		return
	}

	if len(networkMap2.Peers) != 1 {
		t.Errorf("expecting Account NetworkMap to have 1 peers, got %v", len(networkMap2.Peers))
	}

	if len(networkMap2.Peers) > 0 && networkMap2.Peers[0].Key != peerKey1.PublicKey().String() {
		t.Errorf(
			"expecting Account NetworkMap to have peer with a key %s, got %s",
			peerKey1.PublicKey().String(),
			networkMap2.Peers[0].Key,
		)
	}

	policy.Enabled = false
	err = manager.SavePolicy(account.Id, userID, &policy)
	if err != nil {
		t.Errorf("expecting rule to be added, got failure %v", err)
		return
	}

	networkMap1, err = manager.GetNetworkMap(peer1.ID)
	if err != nil {
		t.Fatal(err)
		return
	}

	if len(networkMap1.Peers) != 0 {
		t.Errorf(
			"expecting Account NetworkMap to have 0 peers, got %v: %v",
			len(networkMap1.Peers),
			networkMap1.Peers,
		)
		return
	}

	networkMap2, err = manager.GetNetworkMap(peer2.ID)
	if err != nil {
		t.Fatal(err)
		return
	}

	if len(networkMap2.Peers) != 0 {
		t.Errorf("expecting Account NetworkMap to have 0 peers, got %v", len(networkMap2.Peers))
	}
}

func TestAccountManager_GetPeerNetwork(t *testing.T) {
	manager, err := createManager(t)
	if err != nil {
		t.Fatal(err)
		return
	}

	expectedId := "test_account"
	userId := "account_creator"
	account, err := createAccount(manager, expectedId, userId, "")
	if err != nil {
		t.Fatal(err)
	}

	setupKey, err := manager.CreateSetupKey(account.Id, "test-key", SetupKeyReusable, time.Hour, nil, 999, userId, false)
	if err != nil {
		t.Fatal("error creating setup key")
		return
	}

	peerKey1, err := wgtypes.GeneratePrivateKey()
	if err != nil {
		t.Fatal(err)
		return
	}

	peer1, _, err := manager.AddPeer(setupKey.Key, "", &nbpeer.Peer{
		Key:  peerKey1.PublicKey().String(),
		Meta: nbpeer.PeerSystemMeta{Hostname: "test-peer-1"},
	})
	if err != nil {
		t.Errorf("expecting peer to be added, got failure %v", err)
		return
	}

	peerKey2, err := wgtypes.GeneratePrivateKey()
	if err != nil {
		t.Fatal(err)
		return
	}
	_, _, err = manager.AddPeer(setupKey.Key, "", &nbpeer.Peer{
		Key:  peerKey2.PublicKey().String(),
		Meta: nbpeer.PeerSystemMeta{Hostname: "test-peer-2"},
	})

	if err != nil {
		t.Errorf("expecting peer to be added, got failure %v", err)
		return
	}

	network, err := manager.GetPeerNetwork(peer1.ID)
	if err != nil {
		t.Fatal(err)
		return
	}

	if account.Network.Identifier != network.Identifier {
		t.Errorf("expecting Account Networks ID to be equal, got %s expected %s", network.Identifier, account.Network.Identifier)
	}
}

func TestDefaultAccountManager_GetPeer(t *testing.T) {
	manager, err := createManager(t)
	if err != nil {
		t.Fatal(err)
		return
	}

	// account with an admin and a regular user
	accountID := "test_account"
	adminUser := "account_creator"
	someUser := "some_user"
	account := newAccountWithId(accountID, adminUser, "")
	account.Users[someUser] = &User{
		Id:   someUser,
		Role: UserRoleUser,
	}
	account.Settings.RegularUsersViewBlocked = false

	err = manager.Store.SaveAccount(account)
	if err != nil {
		t.Fatal(err)
		return
	}

	// two peers one added by a regular user and one with a setup key
	setupKey, err := manager.CreateSetupKey(account.Id, "test-key", SetupKeyReusable, time.Hour, nil, 999, adminUser, false)
	if err != nil {
		t.Fatal("error creating setup key")
		return
	}

	peerKey1, err := wgtypes.GeneratePrivateKey()
	if err != nil {
		t.Fatal(err)
		return
	}

	peer1, _, err := manager.AddPeer("", someUser, &nbpeer.Peer{
		Key:  peerKey1.PublicKey().String(),
		Meta: nbpeer.PeerSystemMeta{Hostname: "test-peer-2"},
	})
	if err != nil {
		t.Errorf("expecting peer to be added, got failure %v", err)
		return
	}

	peerKey2, err := wgtypes.GeneratePrivateKey()
	if err != nil {
		t.Fatal(err)
		return
	}

	// the second peer added with a setup key
	peer2, _, err := manager.AddPeer(setupKey.Key, "", &nbpeer.Peer{
		Key:  peerKey2.PublicKey().String(),
		Meta: nbpeer.PeerSystemMeta{Hostname: "test-peer-2"},
	})
	if err != nil {
		t.Fatal(err)
		return
	}

	// the user can see its own peer
	peer, err := manager.GetPeer(accountID, peer1.ID, someUser)
	if err != nil {
		t.Fatal(err)
		return
	}
	assert.NotNil(t, peer)

	// the user can see peer2 because peer1 of the user has access to peer2 due to the All group and the default rule 0 all-to-all access
	peer, err = manager.GetPeer(accountID, peer2.ID, someUser)
	if err != nil {
		t.Fatal(err)
		return
	}
	assert.NotNil(t, peer)

	// delete the all-to-all policy so that user's peer1 has no access to peer2
	for _, policy := range account.Policies {
		err = manager.DeletePolicy(accountID, policy.ID, adminUser)
		if err != nil {
			t.Fatal(err)
			return
		}
	}

	// at this point the user can't see the details of peer2
	peer, err = manager.GetPeer(accountID, peer2.ID, someUser) //nolint
	assert.Error(t, err)

	// admin users can always access all the peers
	peer, err = manager.GetPeer(accountID, peer1.ID, adminUser)
	if err != nil {
		t.Fatal(err)
		return
	}
	assert.NotNil(t, peer)

	peer, err = manager.GetPeer(accountID, peer2.ID, adminUser)
	if err != nil {
		t.Fatal(err)
		return
	}
	assert.NotNil(t, peer)
}

func TestDefaultAccountManager_GetPeers(t *testing.T) {
	testCases := []struct {
		name                string
		role                UserRole
		limitedViewSettings bool
		isServiceUser       bool
		expectedPeerCount   int
	}{
		{
			name:                "Regular user, no limited view settings, not a service user",
			role:                UserRoleUser,
			limitedViewSettings: false,
			isServiceUser:       false,
			expectedPeerCount:   1,
		},
		{
			name:                "Service user, no limited view settings",
			role:                UserRoleUser,
			limitedViewSettings: false,
			isServiceUser:       true,
			expectedPeerCount:   2,
		},
		{
			name:                "Regular user, limited view settings",
			role:                UserRoleUser,
			limitedViewSettings: true,
			isServiceUser:       false,
			expectedPeerCount:   0,
		},
		{
			name:                "Service user, limited view settings",
			role:                UserRoleUser,
			limitedViewSettings: true,
			isServiceUser:       true,
			expectedPeerCount:   2,
		},
		{
			name:                "Admin, no limited view settings, not a service user",
			role:                UserRoleAdmin,
			limitedViewSettings: false,
			isServiceUser:       false,
			expectedPeerCount:   2,
		},
		{
			name:                "Admin service user, no limited view settings",
			role:                UserRoleAdmin,
			limitedViewSettings: false,
			isServiceUser:       true,
			expectedPeerCount:   2,
		},
		{
			name:                "Admin, limited view settings",
			role:                UserRoleAdmin,
			limitedViewSettings: true,
			isServiceUser:       false,
			expectedPeerCount:   2,
		},
		{
			name:                "Admin Service user, limited view settings",
			role:                UserRoleAdmin,
			limitedViewSettings: true,
			isServiceUser:       true,
			expectedPeerCount:   2,
		},
		{
			name:                "Owner, no limited view settings",
			role:                UserRoleOwner,
			limitedViewSettings: true,
			isServiceUser:       false,
			expectedPeerCount:   2,
		},
		{
			name:                "Owner, limited view settings",
			role:                UserRoleOwner,
			limitedViewSettings: true,
			isServiceUser:       false,
			expectedPeerCount:   2,
		},
	}
	for _, testCase := range testCases {
		t.Run(testCase.name, func(t *testing.T) {
			manager, err := createManager(t)
			if err != nil {
				t.Fatal(err)
				return
			}

			// account with an admin and a regular user
			accountID := "test_account"
			adminUser := "account_creator"
			someUser := "some_user"
			account := newAccountWithId(accountID, adminUser, "")
			account.Users[someUser] = &User{
				Id:            someUser,
				Role:          testCase.role,
				IsServiceUser: testCase.isServiceUser,
			}
			account.Policies = []*Policy{}
			account.Settings.RegularUsersViewBlocked = testCase.limitedViewSettings

			err = manager.Store.SaveAccount(account)
			if err != nil {
				t.Fatal(err)
				return
			}

			peerKey1, err := wgtypes.GeneratePrivateKey()
			if err != nil {
				t.Fatal(err)
				return
			}

			peerKey2, err := wgtypes.GeneratePrivateKey()
			if err != nil {
				t.Fatal(err)
				return
			}

			_, _, err = manager.AddPeer("", someUser, &nbpeer.Peer{
				Key:  peerKey1.PublicKey().String(),
				Meta: nbpeer.PeerSystemMeta{Hostname: "test-peer-1"},
			})
			if err != nil {
				t.Errorf("expecting peer to be added, got failure %v", err)
				return
			}

			_, _, err = manager.AddPeer("", adminUser, &nbpeer.Peer{
				Key:  peerKey2.PublicKey().String(),
				Meta: nbpeer.PeerSystemMeta{Hostname: "test-peer-2"},
			})
			if err != nil {
				t.Errorf("expecting peer to be added, got failure %v", err)
				return
			}

			peers, err := manager.GetPeers(accountID, someUser)
			if err != nil {
				t.Fatal(err)
				return
			}
			assert.NotNil(t, peers)

			assert.Len(t, peers, testCase.expectedPeerCount)

		})
	}

}