package cloudcmd

import (
	"context"
	"errors"
	"strconv"
	"testing"

	azurecl "github.com/edgelesssys/constellation/cli/internal/azure/client"
	gcpcl "github.com/edgelesssys/constellation/cli/internal/gcp/client"
	"github.com/edgelesssys/constellation/internal/azureshared"
	"github.com/edgelesssys/constellation/internal/cloud/cloudprovider"
	"github.com/edgelesssys/constellation/internal/cloud/cloudtypes"
	"github.com/edgelesssys/constellation/internal/state"
	"go.uber.org/goleak"
)

func TestMain(m *testing.M) {
	goleak.VerifyTestMain(m,
		// https://github.com/census-instrumentation/opencensus-go/issues/1262
		goleak.IgnoreTopFunction("go.opencensus.io/stats/view.(*worker).start"),
	)
}

type fakeAzureClient struct {
	workers       cloudtypes.Instances
	controlPlanes cloudtypes.Instances

	resourceGroup        string
	name                 string
	uid                  string
	location             string
	subscriptionID       string
	tenantID             string
	subnetID             string
	loadBalancerName     string
	controlPlaneScaleSet string
	workerScaleSet       string
	networkSecurityGroup string
	adAppObjectID        string
}

func (c *fakeAzureClient) GetState() state.ConstellationState {
	return state.ConstellationState{
		CloudProvider:              cloudprovider.Azure.String(),
		AzureWorkerInstances:       c.workers,
		AzureControlPlaneInstances: c.controlPlanes,
		Name:                       c.name,
		UID:                        c.uid,
		AzureResourceGroup:         c.resourceGroup,
		AzureLocation:              c.location,
		AzureSubscription:          c.subscriptionID,
		AzureTenant:                c.tenantID,
		AzureSubnet:                c.subnetID,
		AzureNetworkSecurityGroup:  c.networkSecurityGroup,
		AzureWorkerScaleSet:        c.workerScaleSet,
		AzureControlPlaneScaleSet:  c.controlPlaneScaleSet,
		AzureADAppObjectID:         c.adAppObjectID,
	}
}

func (c *fakeAzureClient) SetState(stat state.ConstellationState) {
	c.workers = stat.AzureWorkerInstances
	c.controlPlanes = stat.AzureControlPlaneInstances
	c.name = stat.Name
	c.uid = stat.UID
	c.resourceGroup = stat.AzureResourceGroup
	c.location = stat.AzureLocation
	c.subscriptionID = stat.AzureSubscription
	c.tenantID = stat.AzureTenant
	c.subnetID = stat.AzureSubnet
	c.networkSecurityGroup = stat.AzureNetworkSecurityGroup
	c.workerScaleSet = stat.AzureWorkerScaleSet
	c.controlPlaneScaleSet = stat.AzureControlPlaneScaleSet
	c.adAppObjectID = stat.AzureADAppObjectID
}

func (c *fakeAzureClient) CreateApplicationInsight(ctx context.Context) error {
	return nil
}

func (c *fakeAzureClient) CreateVirtualNetwork(ctx context.Context) error {
	c.subnetID = "subnet"
	return nil
}

func (c *fakeAzureClient) CreateExternalLoadBalancer(ctx context.Context) error {
	c.loadBalancerName = "loadBalancer"
	return nil
}

func (c *fakeAzureClient) CreateSecurityGroup(ctx context.Context, input azurecl.NetworkSecurityGroupInput) error {
	c.networkSecurityGroup = "network-security-group"
	return nil
}

func (c *fakeAzureClient) CreateInstances(ctx context.Context, input azurecl.CreateInstancesInput) error {
	c.controlPlaneScaleSet = "controlplanes-scale-set"
	c.workerScaleSet = "workers-scale-set"
	c.workers = make(cloudtypes.Instances)
	for i := 0; i < input.CountWorkers; i++ {
		id := "id-" + strconv.Itoa(i)
		c.workers[id] = cloudtypes.Instance{PublicIP: "192.0.2.1", PrivateIP: "192.0.2.1"}
	}
	c.controlPlanes = make(cloudtypes.Instances)
	for i := 0; i < input.CountControlPlanes; i++ {
		id := "id-" + strconv.Itoa(i)
		c.controlPlanes[id] = cloudtypes.Instance{PublicIP: "192.0.2.1", PrivateIP: "192.0.2.1"}
	}
	return nil
}

func (c *fakeAzureClient) CreateServicePrincipal(ctx context.Context) (string, error) {
	c.adAppObjectID = "00000000-0000-0000-0000-000000000001"
	return azureshared.ApplicationCredentials{
		ClientID:     "client-id",
		ClientSecret: "client-secret",
	}.ToCloudServiceAccountURI(), nil
}

func (c *fakeAzureClient) TerminateResourceGroupResources(ctx context.Context) error {
	// TODO(katexochen)
	return nil
}

func (c *fakeAzureClient) TerminateServicePrincipal(ctx context.Context) error {
	if c.adAppObjectID == "" {
		return nil
	}
	c.adAppObjectID = ""
	return nil
}

type stubAzureClient struct {
	terminateResourceGroupResourcesCalled bool
	terminateServicePrincipalCalled       bool

	createApplicationInsightErr        error
	createVirtualNetworkErr            error
	createSecurityGroupErr             error
	createLoadBalancerErr              error
	createInstancesErr                 error
	createServicePrincipalErr          error
	terminateResourceGroupResourcesErr error
	terminateServicePrincipalErr       error
}

func (c *stubAzureClient) GetState() state.ConstellationState {
	return state.ConstellationState{}
}

func (c *stubAzureClient) SetState(state.ConstellationState) {
}

func (c *stubAzureClient) CreateExternalLoadBalancer(ctx context.Context) error {
	return c.createLoadBalancerErr
}

func (c *stubAzureClient) CreateApplicationInsight(ctx context.Context) error {
	return c.createApplicationInsightErr
}

func (c *stubAzureClient) CreateVirtualNetwork(ctx context.Context) error {
	return c.createVirtualNetworkErr
}

func (c *stubAzureClient) CreateSecurityGroup(ctx context.Context, input azurecl.NetworkSecurityGroupInput) error {
	return c.createSecurityGroupErr
}

func (c *stubAzureClient) CreateInstances(ctx context.Context, input azurecl.CreateInstancesInput) error {
	return c.createInstancesErr
}

func (c *stubAzureClient) CreateServicePrincipal(ctx context.Context) (string, error) {
	return azureshared.ApplicationCredentials{
		ClientID:     "00000000-0000-0000-0000-000000000000",
		ClientSecret: "secret",
	}.ToCloudServiceAccountURI(), c.createServicePrincipalErr
}

func (c *stubAzureClient) TerminateResourceGroupResources(ctx context.Context) error {
	c.terminateResourceGroupResourcesCalled = true
	return c.terminateResourceGroupResourcesErr
}

func (c *stubAzureClient) TerminateServicePrincipal(ctx context.Context) error {
	c.terminateServicePrincipalCalled = true
	return c.terminateServicePrincipalErr
}

type fakeGcpClient struct {
	workers       cloudtypes.Instances
	controlPlanes cloudtypes.Instances

	workerInstanceGroup       string
	controlPlaneInstanceGroup string
	controlPlaneTemplate      string
	workerTemplate            string
	network                   string
	subnetwork                string
	firewalls                 []string
	project                   string
	uid                       string
	name                      string
	zone                      string
	loadbalancers             []string
}

func (c *fakeGcpClient) GetState() state.ConstellationState {
	return state.ConstellationState{
		CloudProvider:                   cloudprovider.GCP.String(),
		GCPWorkerInstances:              c.workers,
		GCPControlPlaneInstances:        c.controlPlanes,
		GCPWorkerInstanceGroup:          c.workerInstanceGroup,
		GCPControlPlaneInstanceGroup:    c.controlPlaneInstanceGroup,
		GCPWorkerInstanceTemplate:       c.workerTemplate,
		GCPControlPlaneInstanceTemplate: c.controlPlaneTemplate,
		GCPNetwork:                      c.network,
		GCPSubnetwork:                   c.subnetwork,
		GCPFirewalls:                    c.firewalls,
		GCPProject:                      c.project,
		Name:                            c.name,
		UID:                             c.uid,
		GCPZone:                         c.zone,
		GCPLoadbalancers:                c.loadbalancers,
	}
}

func (c *fakeGcpClient) SetState(stat state.ConstellationState) {
	c.workers = stat.GCPWorkerInstances
	c.controlPlanes = stat.GCPControlPlaneInstances
	c.workerInstanceGroup = stat.GCPWorkerInstanceGroup
	c.controlPlaneInstanceGroup = stat.GCPControlPlaneInstanceGroup
	c.workerTemplate = stat.GCPWorkerInstanceTemplate
	c.controlPlaneTemplate = stat.GCPControlPlaneInstanceTemplate
	c.network = stat.GCPNetwork
	c.subnetwork = stat.GCPSubnetwork
	c.firewalls = stat.GCPFirewalls
	c.project = stat.GCPProject
	c.name = stat.Name
	c.uid = stat.UID
	c.zone = stat.GCPZone
	c.loadbalancers = stat.GCPLoadbalancers
}

func (c *fakeGcpClient) CreateVPCs(ctx context.Context) error {
	c.network = "network"
	c.subnetwork = "subnetwork"
	return nil
}

func (c *fakeGcpClient) CreateFirewall(ctx context.Context, input gcpcl.FirewallInput) error {
	if c.network == "" {
		return errors.New("client has not network")
	}
	for _, rule := range input.Ingress {
		c.firewalls = append(c.firewalls, rule.Name)
	}
	return nil
}

func (c *fakeGcpClient) CreateInstances(ctx context.Context, input gcpcl.CreateInstancesInput) error {
	c.controlPlaneInstanceGroup = "controlplane-group"
	c.workerInstanceGroup = "workers-group"
	c.workerTemplate = "worker-template"
	c.controlPlaneTemplate = "controlplane-template"
	c.workers = make(cloudtypes.Instances)
	for i := 0; i < input.CountWorkers; i++ {
		id := "id-" + strconv.Itoa(i)
		c.workers[id] = cloudtypes.Instance{PublicIP: "192.0.2.1", PrivateIP: "192.0.2.1"}
	}
	c.controlPlanes = make(cloudtypes.Instances)
	for i := 0; i < input.CountControlPlanes; i++ {
		id := "id-" + strconv.Itoa(i)
		c.controlPlanes[id] = cloudtypes.Instance{PublicIP: "192.0.2.1", PrivateIP: "192.0.2.1"}
	}
	return nil
}

func (c *fakeGcpClient) CreateLoadBalancers(ctx context.Context) error {
	c.loadbalancers = []string{"kube-lb", "boot-lb", "verify-lb"}
	return nil
}

func (c *fakeGcpClient) TerminateFirewall(ctx context.Context) error {
	if len(c.firewalls) == 0 {
		return nil
	}
	c.firewalls = nil
	return nil
}

func (c *fakeGcpClient) TerminateVPCs(context.Context) error {
	if len(c.firewalls) != 0 {
		return errors.New("client has firewalls, which must be deleted first")
	}
	c.network = ""
	c.subnetwork = ""
	return nil
}

func (c *fakeGcpClient) TerminateInstances(context.Context) error {
	c.workerTemplate = ""
	c.controlPlaneTemplate = ""
	c.workerInstanceGroup = ""
	c.controlPlaneInstanceGroup = ""
	c.workers = nil
	c.controlPlanes = nil
	return nil
}

func (c *fakeGcpClient) TerminateLoadBalancers(context.Context) error {
	c.loadbalancers = nil
	return nil
}

func (c *fakeGcpClient) Close() error {
	return nil
}

type stubGcpClient struct {
	terminateFirewallCalled  bool
	terminateInstancesCalled bool
	terminateVPCsCalled      bool
	closeCalled              bool

	createVPCsErr            error
	createFirewallErr        error
	createInstancesErr       error
	createLoadBalancerErr    error
	terminateFirewallErr     error
	terminateVPCsErr         error
	terminateInstancesErr    error
	terminateLoadBalancerErr error
	closeErr                 error
}

func (c *stubGcpClient) GetState() state.ConstellationState {
	return state.ConstellationState{}
}

func (c *stubGcpClient) SetState(state.ConstellationState) {
}

func (c *stubGcpClient) CreateVPCs(ctx context.Context) error {
	return c.createVPCsErr
}

func (c *stubGcpClient) CreateFirewall(ctx context.Context, input gcpcl.FirewallInput) error {
	return c.createFirewallErr
}

func (c *stubGcpClient) CreateInstances(ctx context.Context, input gcpcl.CreateInstancesInput) error {
	return c.createInstancesErr
}

func (c *stubGcpClient) CreateLoadBalancers(ctx context.Context) error {
	return c.createLoadBalancerErr
}

func (c *stubGcpClient) TerminateFirewall(ctx context.Context) error {
	c.terminateFirewallCalled = true
	return c.terminateFirewallErr
}

func (c *stubGcpClient) TerminateVPCs(context.Context) error {
	c.terminateVPCsCalled = true
	return c.terminateVPCsErr
}

func (c *stubGcpClient) TerminateInstances(context.Context) error {
	c.terminateInstancesCalled = true
	return c.terminateInstancesErr
}

func (c *stubGcpClient) TerminateLoadBalancers(context.Context) error {
	return c.terminateLoadBalancerErr
}

func (c *stubGcpClient) Close() error {
	c.closeCalled = true
	return c.closeErr
}