package aws

import (
	"context"
	"testing"

	"github.com/aws/aws-sdk-go/aws"
	awssdk "github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/service/ec2"
	"github.com/cloudskiff/driftctl/mocks"
	"github.com/cloudskiff/driftctl/pkg/parallel"
	"github.com/cloudskiff/driftctl/pkg/remote/deserializer"
	"github.com/cloudskiff/driftctl/pkg/resource"
	awsdeserializer "github.com/cloudskiff/driftctl/pkg/resource/aws/deserializer"
	"github.com/cloudskiff/driftctl/pkg/terraform"
	"github.com/cloudskiff/driftctl/test"
	"github.com/cloudskiff/driftctl/test/goldenfile"
	mocks2 "github.com/cloudskiff/driftctl/test/mocks"
	"github.com/stretchr/testify/mock"
)

func TestRouteTableAssociationSupplier_Resources(t *testing.T) {
	cases := []struct {
		test    string
		dirName string
		mocks   func(client *mocks.FakeEC2)
		err     error
	}{
		{
			test:    "no route table associations (test for nil values)",
			dirName: "route_table_assoc_empty",
			mocks: func(client *mocks.FakeEC2) {
				client.On("DescribeRouteTablesPages",
					&ec2.DescribeRouteTablesInput{},
					mock.MatchedBy(func(callback func(res *ec2.DescribeRouteTablesOutput, lastPage bool) bool) bool {
						callback(&ec2.DescribeRouteTablesOutput{
							RouteTables: []*ec2.RouteTable{
								{
									RouteTableId: awssdk.String("assoc_with_nil"),
									Associations: []*ec2.RouteTableAssociation{
										{
											AssociationState:        nil,
											GatewayId:               nil,
											Main:                    nil,
											RouteTableAssociationId: nil,
											RouteTableId:            nil,
											SubnetId:                nil,
										},
									},
								},
								{
									RouteTableId: awssdk.String("nil_assoc"),
								},
							},
						}, true)
						return true
					})).Return(nil)
			},
			err: nil,
		},
		{
			test:    "route_table_association (mixed subnet and gateway associations)",
			dirName: "route_table_assoc",
			mocks: func(client *mocks.FakeEC2) {
				client.On("DescribeRouteTablesPages",
					&ec2.DescribeRouteTablesInput{},
					mock.MatchedBy(func(callback func(res *ec2.DescribeRouteTablesOutput, lastPage bool) bool) bool {
						callback(&ec2.DescribeRouteTablesOutput{
							RouteTables: []*ec2.RouteTable{
								{
									RouteTableId: aws.String("rtb-05aa6c5673311a17b"), // route
									Associations: []*ec2.RouteTableAssociation{
										{ // Should be ignored
											AssociationState: &ec2.RouteTableAssociationState{
												State: awssdk.String("disassociated"),
											},
											GatewayId: awssdk.String("dummy-id"),
										},
										{ // Should be ignored
											SubnetId:  nil,
											GatewayId: nil,
										},
										{ // assoc_route_subnet1
											AssociationState: &ec2.RouteTableAssociationState{
												State: awssdk.String("associated"),
											},
											Main:                    awssdk.Bool(false),
											RouteTableAssociationId: awssdk.String("rtbassoc-0809598f92dbec03b"),
											RouteTableId:            awssdk.String("rtb-05aa6c5673311a17b"),
											SubnetId:                awssdk.String("subnet-05185af647b2eeda3"),
										},
										{ // assoc_route_subnet
											AssociationState: &ec2.RouteTableAssociationState{
												State: awssdk.String("associated"),
											},
											Main:                    awssdk.Bool(false),
											RouteTableAssociationId: awssdk.String("rtbassoc-01957791b2cfe6ea4"),
											RouteTableId:            awssdk.String("rtb-05aa6c5673311a17b"),
											SubnetId:                awssdk.String("subnet-0e93dbfa2e5dd8282"),
										},
										{ // assoc_route_subnet2
											AssociationState: &ec2.RouteTableAssociationState{
												State: awssdk.String("associated"),
											},
											GatewayId:               nil,
											Main:                    awssdk.Bool(false),
											RouteTableAssociationId: awssdk.String("rtbassoc-0b4f97ea57490e213"),
											RouteTableId:            awssdk.String("rtb-05aa6c5673311a17b"),
											SubnetId:                awssdk.String("subnet-0fd966efd884d0362"),
										},
									},
								},
								{
									RouteTableId: aws.String("rtb-09df7cc9d16de9f8f"), // route2
									Associations: []*ec2.RouteTableAssociation{
										{ // assoc_route2_gateway
											AssociationState: &ec2.RouteTableAssociationState{
												State: awssdk.String("associated"),
											},
											RouteTableAssociationId: awssdk.String("rtbassoc-0a79ccacfceb4944b"),
											RouteTableId:            awssdk.String("rtb-09df7cc9d16de9f8f"),
											GatewayId:               awssdk.String("igw-0238f6e09185ac954"),
										},
									},
								},
							},
						}, true)
						return true
					})).Return(nil)
			},
			err: nil,
		},
	}
	for _, c := range cases {
		shouldUpdate := c.dirName == *goldenfile.Update
		if shouldUpdate {
			provider, err := NewTerraFormProvider()
			if err != nil {
				t.Fatal(err)
			}

			terraform.AddProvider(terraform.AWS, provider)
			resource.AddSupplier(NewRouteTableAssociationSupplier(provider.Runner(), ec2.New(provider.session)))
		}

		t.Run(c.test, func(tt *testing.T) {
			fakeEC2 := mocks.FakeEC2{}
			c.mocks(&fakeEC2)
			provider := mocks2.NewMockedGoldenTFProvider(c.dirName, terraform.Provider(terraform.AWS), shouldUpdate)
			routeTableAssociationDeserializer := awsdeserializer.NewRouteTableAssociationDeserializer()
			s := &RouteTableAssociationSupplier{
				provider,
				routeTableAssociationDeserializer,
				&fakeEC2,
				terraform.NewParallelResourceReader(parallel.NewParallelRunner(context.TODO(), 10)),
			}
			got, err := s.Resources()
			if c.err != err {
				tt.Errorf("Expected error %+v got %+v", c.err, err)
			}

			mock.AssertExpectationsForObjects(tt)
			deserializers := []deserializer.CTYDeserializer{routeTableAssociationDeserializer}
			test.CtyTestDiffMixed(got, c.dirName, provider, deserializers, shouldUpdate, tt)
		})
	}
}