// Copyright 2015 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package azure

import (
	"context"
	"fmt"
	"testing"

	"github.com/Azure/azure-sdk-for-go/sdk/azcore/arm"
	"github.com/Azure/azure-sdk-for-go/sdk/resourcemanager/compute/armcompute/v5"
	"github.com/Azure/azure-sdk-for-go/sdk/resourcemanager/network/armnetwork/v4"
	cache "github.com/Code-Hex/go-generics-cache"
	"github.com/Code-Hex/go-generics-cache/policy/lru"
	"github.com/go-kit/log"
	"github.com/stretchr/testify/require"
	"go.uber.org/goleak"
)

func TestMain(m *testing.M) {
	goleak.VerifyTestMain(m,
		goleak.IgnoreTopFunction("github.com/Code-Hex/go-generics-cache.(*janitor).run.func1"),
	)
}

func TestMapFromVMWithEmptyTags(t *testing.T) {
	id := "test"
	name := "name"
	size := "size"
	vmSize := armcompute.VirtualMachineSizeTypes(size)
	osType := armcompute.OperatingSystemTypesLinux
	vmType := "type"
	location := "westeurope"
	computerName := "computer_name"
	networkProfile := armcompute.NetworkProfile{
		NetworkInterfaces: []*armcompute.NetworkInterfaceReference{},
	}
	properties := &armcompute.VirtualMachineProperties{
		OSProfile: &armcompute.OSProfile{
			ComputerName: &computerName,
		},
		StorageProfile: &armcompute.StorageProfile{
			OSDisk: &armcompute.OSDisk{
				OSType: &osType,
			},
		},
		NetworkProfile: &networkProfile,
		HardwareProfile: &armcompute.HardwareProfile{
			VMSize: &vmSize,
		},
	}

	testVM := armcompute.VirtualMachine{
		ID:         &id,
		Name:       &name,
		Type:       &vmType,
		Location:   &location,
		Tags:       nil,
		Properties: properties,
	}

	expectedVM := virtualMachine{
		ID:                id,
		Name:              name,
		ComputerName:      computerName,
		Type:              vmType,
		Location:          location,
		OsType:            "Linux",
		Tags:              map[string]*string{},
		NetworkInterfaces: []string{},
		Size:              size,
	}

	actualVM := mapFromVM(testVM)

	require.Equal(t, expectedVM, actualVM)
}

func TestVMToLabelSet(t *testing.T) {
	id := "/subscriptions/00000000-0000-0000-0000-000000000000/test"
	name := "name"
	size := "size"
	vmSize := armcompute.VirtualMachineSizeTypes(size)
	osType := armcompute.OperatingSystemTypesLinux
	vmType := "type"
	location := "westeurope"
	computerName := "computer_name"
	networkID := "/subscriptions/00000000-0000-0000-0000-000000000000/network1"
	ipAddress := "10.20.30.40"
	primary := true
	networkProfile := armcompute.NetworkProfile{
		NetworkInterfaces: []*armcompute.NetworkInterfaceReference{
			{
				ID:         &networkID,
				Properties: &armcompute.NetworkInterfaceReferenceProperties{Primary: &primary},
			},
		},
	}
	properties := &armcompute.VirtualMachineProperties{
		OSProfile: &armcompute.OSProfile{
			ComputerName: &computerName,
		},
		StorageProfile: &armcompute.StorageProfile{
			OSDisk: &armcompute.OSDisk{
				OSType: &osType,
			},
		},
		NetworkProfile: &networkProfile,
		HardwareProfile: &armcompute.HardwareProfile{
			VMSize: &vmSize,
		},
	}

	testVM := armcompute.VirtualMachine{
		ID:         &id,
		Name:       &name,
		Type:       &vmType,
		Location:   &location,
		Tags:       nil,
		Properties: properties,
	}

	expectedVM := virtualMachine{
		ID:                id,
		Name:              name,
		ComputerName:      computerName,
		Type:              vmType,
		Location:          location,
		OsType:            "Linux",
		Tags:              map[string]*string{},
		NetworkInterfaces: []string{networkID},
		Size:              size,
	}

	actualVM := mapFromVM(testVM)

	require.Equal(t, expectedVM, actualVM)

	cfg := DefaultSDConfig
	d := &Discovery{
		cfg:    &cfg,
		logger: log.NewNopLogger(),
		cache:  cache.New(cache.AsLRU[string, *armnetwork.Interface](lru.WithCapacity(5))),
	}
	network := armnetwork.Interface{
		Name: &networkID,
		Properties: &armnetwork.InterfacePropertiesFormat{
			Primary: &primary,
			IPConfigurations: []*armnetwork.InterfaceIPConfiguration{
				{Properties: &armnetwork.InterfaceIPConfigurationPropertiesFormat{
					PrivateIPAddress: &ipAddress,
				}},
			},
		},
	}
	client := &mockAzureClient{
		networkInterface: &network,
	}
	labelSet, err := d.vmToLabelSet(context.Background(), client, actualVM)
	require.NoError(t, err)
	require.Len(t, labelSet, 11)
}

func TestMapFromVMWithEmptyOSType(t *testing.T) {
	id := "test"
	name := "name"
	size := "size"
	vmSize := armcompute.VirtualMachineSizeTypes(size)
	vmType := "type"
	location := "westeurope"
	computerName := "computer_name"
	networkProfile := armcompute.NetworkProfile{
		NetworkInterfaces: []*armcompute.NetworkInterfaceReference{},
	}
	properties := &armcompute.VirtualMachineProperties{
		OSProfile: &armcompute.OSProfile{
			ComputerName: &computerName,
		},
		StorageProfile: &armcompute.StorageProfile{
			OSDisk: &armcompute.OSDisk{},
		},
		NetworkProfile: &networkProfile,
		HardwareProfile: &armcompute.HardwareProfile{
			VMSize: &vmSize,
		},
	}

	testVM := armcompute.VirtualMachine{
		ID:         &id,
		Name:       &name,
		Type:       &vmType,
		Location:   &location,
		Tags:       nil,
		Properties: properties,
	}

	expectedVM := virtualMachine{
		ID:                id,
		Name:              name,
		ComputerName:      computerName,
		Type:              vmType,
		Location:          location,
		Tags:              map[string]*string{},
		NetworkInterfaces: []string{},
		Size:              size,
	}

	actualVM := mapFromVM(testVM)

	require.Equal(t, expectedVM, actualVM)
}

func TestMapFromVMWithTags(t *testing.T) {
	id := "test"
	name := "name"
	size := "size"
	vmSize := armcompute.VirtualMachineSizeTypes(size)
	osType := armcompute.OperatingSystemTypesLinux
	vmType := "type"
	location := "westeurope"
	computerName := "computer_name"
	tags := map[string]*string{
		"prometheus": new(string),
	}
	networkProfile := armcompute.NetworkProfile{
		NetworkInterfaces: []*armcompute.NetworkInterfaceReference{},
	}
	properties := &armcompute.VirtualMachineProperties{
		OSProfile: &armcompute.OSProfile{
			ComputerName: &computerName,
		},
		StorageProfile: &armcompute.StorageProfile{
			OSDisk: &armcompute.OSDisk{
				OSType: &osType,
			},
		},
		NetworkProfile: &networkProfile,
		HardwareProfile: &armcompute.HardwareProfile{
			VMSize: &vmSize,
		},
	}

	testVM := armcompute.VirtualMachine{
		ID:         &id,
		Name:       &name,
		Type:       &vmType,
		Location:   &location,
		Tags:       tags,
		Properties: properties,
	}

	expectedVM := virtualMachine{
		ID:                id,
		Name:              name,
		ComputerName:      computerName,
		Type:              vmType,
		Location:          location,
		OsType:            "Linux",
		Tags:              tags,
		NetworkInterfaces: []string{},
		Size:              size,
	}

	actualVM := mapFromVM(testVM)

	require.Equal(t, expectedVM, actualVM)
}

func TestMapFromVMScaleSetVMWithEmptyTags(t *testing.T) {
	id := "test"
	name := "name"
	size := "size"
	vmSize := armcompute.VirtualMachineSizeTypes(size)
	osType := armcompute.OperatingSystemTypesLinux
	vmType := "type"
	instanceID := "123"
	location := "westeurope"
	computerName := "computer_name"
	networkProfile := armcompute.NetworkProfile{
		NetworkInterfaces: []*armcompute.NetworkInterfaceReference{},
	}
	properties := &armcompute.VirtualMachineScaleSetVMProperties{
		OSProfile: &armcompute.OSProfile{
			ComputerName: &computerName,
		},
		StorageProfile: &armcompute.StorageProfile{
			OSDisk: &armcompute.OSDisk{
				OSType: &osType,
			},
		},
		NetworkProfile: &networkProfile,
		HardwareProfile: &armcompute.HardwareProfile{
			VMSize: &vmSize,
		},
	}

	testVM := armcompute.VirtualMachineScaleSetVM{
		ID:         &id,
		Name:       &name,
		Type:       &vmType,
		InstanceID: &instanceID,
		Location:   &location,
		Tags:       nil,
		Properties: properties,
	}

	scaleSet := "testSet"
	expectedVM := virtualMachine{
		ID:                id,
		Name:              name,
		ComputerName:      computerName,
		Type:              vmType,
		Location:          location,
		OsType:            "Linux",
		Tags:              map[string]*string{},
		NetworkInterfaces: []string{},
		ScaleSet:          scaleSet,
		InstanceID:        instanceID,
		Size:              size,
	}

	actualVM := mapFromVMScaleSetVM(testVM, scaleSet)

	require.Equal(t, expectedVM, actualVM)
}

func TestMapFromVMScaleSetVMWithEmptyOSType(t *testing.T) {
	id := "test"
	name := "name"
	size := "size"
	vmSize := armcompute.VirtualMachineSizeTypes(size)
	vmType := "type"
	instanceID := "123"
	location := "westeurope"
	computerName := "computer_name"
	networkProfile := armcompute.NetworkProfile{
		NetworkInterfaces: []*armcompute.NetworkInterfaceReference{},
	}
	properties := &armcompute.VirtualMachineScaleSetVMProperties{
		OSProfile: &armcompute.OSProfile{
			ComputerName: &computerName,
		},
		StorageProfile: &armcompute.StorageProfile{},
		NetworkProfile: &networkProfile,
		HardwareProfile: &armcompute.HardwareProfile{
			VMSize: &vmSize,
		},
	}

	testVM := armcompute.VirtualMachineScaleSetVM{
		ID:         &id,
		Name:       &name,
		Type:       &vmType,
		InstanceID: &instanceID,
		Location:   &location,
		Tags:       nil,
		Properties: properties,
	}

	scaleSet := "testSet"
	expectedVM := virtualMachine{
		ID:                id,
		Name:              name,
		ComputerName:      computerName,
		Type:              vmType,
		Location:          location,
		Tags:              map[string]*string{},
		NetworkInterfaces: []string{},
		ScaleSet:          scaleSet,
		InstanceID:        instanceID,
		Size:              size,
	}

	actualVM := mapFromVMScaleSetVM(testVM, scaleSet)

	require.Equal(t, expectedVM, actualVM)
}

func TestMapFromVMScaleSetVMWithTags(t *testing.T) {
	id := "test"
	name := "name"
	size := "size"
	vmSize := armcompute.VirtualMachineSizeTypes(size)
	osType := armcompute.OperatingSystemTypesLinux
	vmType := "type"
	instanceID := "123"
	location := "westeurope"
	computerName := "computer_name"
	tags := map[string]*string{
		"prometheus": new(string),
	}
	networkProfile := armcompute.NetworkProfile{
		NetworkInterfaces: []*armcompute.NetworkInterfaceReference{},
	}
	properties := &armcompute.VirtualMachineScaleSetVMProperties{
		OSProfile: &armcompute.OSProfile{
			ComputerName: &computerName,
		},
		StorageProfile: &armcompute.StorageProfile{
			OSDisk: &armcompute.OSDisk{
				OSType: &osType,
			},
		},
		NetworkProfile: &networkProfile,
		HardwareProfile: &armcompute.HardwareProfile{
			VMSize: &vmSize,
		},
	}

	testVM := armcompute.VirtualMachineScaleSetVM{
		ID:         &id,
		Name:       &name,
		Type:       &vmType,
		InstanceID: &instanceID,
		Location:   &location,
		Tags:       tags,
		Properties: properties,
	}

	scaleSet := "testSet"
	expectedVM := virtualMachine{
		ID:                id,
		Name:              name,
		ComputerName:      computerName,
		Type:              vmType,
		Location:          location,
		OsType:            "Linux",
		Tags:              tags,
		NetworkInterfaces: []string{},
		ScaleSet:          scaleSet,
		InstanceID:        instanceID,
		Size:              size,
	}

	actualVM := mapFromVMScaleSetVM(testVM, scaleSet)

	require.Equal(t, expectedVM, actualVM)
}

func TestNewAzureResourceFromID(t *testing.T) {
	for _, tc := range []struct {
		id       string
		expected *arm.ResourceID
	}{
		{
			id: "/subscriptions/SUBSCRIPTION_ID/resourceGroups/group/providers/PROVIDER/TYPE/name",
			expected: &arm.ResourceID{
				Name:              "name",
				ResourceGroupName: "group",
			},
		},
		{
			id: "/subscriptions/SUBSCRIPTION_ID/resourceGroups/group/providers/PROVIDER/TYPE/name/TYPE/h",
			expected: &arm.ResourceID{
				Name:              "h",
				ResourceGroupName: "group",
			},
		},
	} {
		actual, err := newAzureResourceFromID(tc.id, nil)
		require.NoError(t, err)
		require.Equal(t, tc.expected.Name, actual.Name)
		require.Equal(t, tc.expected.ResourceGroupName, actual.ResourceGroupName)
	}
}

type mockAzureClient struct {
	networkInterface *armnetwork.Interface
}

var _ client = &mockAzureClient{}

func (*mockAzureClient) getVMs(ctx context.Context, resourceGroup string) ([]virtualMachine, error) {
	return nil, nil
}

func (*mockAzureClient) getScaleSets(ctx context.Context, resourceGroup string) ([]armcompute.VirtualMachineScaleSet, error) {
	return nil, nil
}

func (*mockAzureClient) getScaleSetVMs(ctx context.Context, scaleSet armcompute.VirtualMachineScaleSet) ([]virtualMachine, error) {
	return nil, nil
}

func (m *mockAzureClient) getVMNetworkInterfaceByID(ctx context.Context, networkInterfaceID string) (*armnetwork.Interface, error) {
	if networkInterfaceID == "" {
		return nil, fmt.Errorf("parameter networkInterfaceID cannot be empty")
	}
	return m.networkInterface, nil
}

func (m *mockAzureClient) getVMScaleSetVMNetworkInterfaceByID(ctx context.Context, networkInterfaceID, scaleSetName, instanceID string) (*armnetwork.Interface, error) {
	if scaleSetName == "" {
		return nil, fmt.Errorf("parameter virtualMachineScaleSetName cannot be empty")
	}
	return m.networkInterface, nil
}