package azure

import (
	"context"
	"testing"

	"github.com/Azure/azure-sdk-for-go/profiles/2019-03-01/resources/mgmt/resources"
	"github.com/Azure/azure-sdk-for-go/profiles/preview/preview/subscription/mgmt/subscription"
	"github.com/Azure/go-autorest/autorest/to"
	"github.com/pkg/errors"
	"github.com/stretchr/testify/mock"
	"github.com/stretchr/testify/suite"

	"github.com/docker/api/context/store"

	. "github.com/onsi/gomega"
)

type ContextSuiteTest struct {
	suite.Suite
	mockUserSelector       *MockUserSelector
	mockResourceGroupHeper *MockResourceGroupHelper
	contextCreateHelper    contextCreateACIHelper
}

func (suite *ContextSuiteTest) BeforeTest(suiteName, testName string) {
	suite.mockUserSelector = &MockUserSelector{}
	suite.mockResourceGroupHeper = &MockResourceGroupHelper{}
	suite.contextCreateHelper = contextCreateACIHelper{
		suite.mockUserSelector,
		suite.mockResourceGroupHeper,
	}
}

func (suite *ContextSuiteTest) TestCreateSpecifiedSubscriptionAndGroup() {
	ctx := context.TODO()
	opts := options("1234", "myResourceGroup")
	suite.mockResourceGroupHeper.On("GetGroup", ctx, "1234", "myResourceGroup").Return(group("myResourceGroup", "eastus"), nil)

	data, description, err := suite.contextCreateHelper.createContextData(ctx, opts)

	Expect(err).To(BeNil())
	Expect(description).To(Equal("myResourceGroup@eastus"))
	Expect(data).To(Equal(aciContext("1234", "myResourceGroup", "eastus")))
}

func (suite *ContextSuiteTest) TestErrorOnNonExistentResourceGroup() {
	ctx := context.TODO()
	opts := options("1234", "myResourceGroup")
	notFoundError := errors.New(`Not Found: "myResourceGroup"`)
	suite.mockResourceGroupHeper.On("GetGroup", ctx, "1234", "myResourceGroup").Return(resources.Group{}, notFoundError)

	data, description, err := suite.contextCreateHelper.createContextData(ctx, opts)

	Expect(data).To(BeNil())
	Expect(description).To(Equal(""))
	Expect(err.Error()).To(Equal("Could not find resource group \"myResourceGroup\": Not Found: \"myResourceGroup\""))
}

func (suite *ContextSuiteTest) TestCreateNewResourceGroup() {
	ctx := context.TODO()
	opts := options("1234", "")
	suite.mockResourceGroupHeper.On("GetGroup", ctx, "1234", "myResourceGroup").Return(group("myResourceGroup", "eastus"), nil)

	selectOptions := []string{"create a new resource group", "group1 (eastus)", "group2 (westeurope)"}
	suite.mockUserSelector.On("userSelect", "Select a resource group", selectOptions).Return(0, nil)
	suite.mockResourceGroupHeper.On("CreateOrUpdate", ctx, "1234", mock.AnythingOfType("string"), mock.AnythingOfType("resources.Group")).Return(group("newResourceGroup", "eastus"), nil)
	suite.mockResourceGroupHeper.On("ListGroups", ctx, "1234").Return([]resources.Group{
		group("group1", "eastus"),
		group("group2", "westeurope"),
	}, nil)

	data, description, err := suite.contextCreateHelper.createContextData(ctx, opts)

	Expect(err).To(BeNil())
	Expect(description).To(Equal("newResourceGroup@eastus"))
	Expect(data).To(Equal(aciContext("1234", "newResourceGroup", "eastus")))
}

func (suite *ContextSuiteTest) TestSelectExistingResourceGroup() {
	ctx := context.TODO()
	opts := options("1234", "")
	selectOptions := []string{"create a new resource group", "group1 (eastus)", "group2 (westeurope)"}
	suite.mockUserSelector.On("userSelect", "Select a resource group", selectOptions).Return(2, nil)
	suite.mockResourceGroupHeper.On("ListGroups", ctx, "1234").Return([]resources.Group{
		group("group1", "eastus"),
		group("group2", "westeurope"),
	}, nil)

	data, description, err := suite.contextCreateHelper.createContextData(ctx, opts)

	Expect(err).To(BeNil())
	Expect(description).To(Equal("group2@westeurope"))
	Expect(data).To(Equal(aciContext("1234", "group2", "westeurope")))
}

func (suite *ContextSuiteTest) TestSelectSingleSubscriptionIdAndExistingResourceGroup() {
	ctx := context.TODO()
	opts := options("", "")
	suite.mockResourceGroupHeper.On("GetSubscriptionIDs", ctx).Return([]subscription.Model{subModel("123456", "Subscription1")}, nil)

	selectOptions := []string{"create a new resource group", "group1 (eastus)", "group2 (westeurope)"}
	suite.mockUserSelector.On("userSelect", "Select a resource group", selectOptions).Return(2, nil)
	suite.mockResourceGroupHeper.On("ListGroups", ctx, "123456").Return([]resources.Group{
		group("group1", "eastus"),
		group("group2", "westeurope"),
	}, nil)

	data, description, err := suite.contextCreateHelper.createContextData(ctx, opts)

	Expect(err).To(BeNil())
	Expect(description).To(Equal("group2@westeurope"))
	Expect(data).To(Equal(aciContext("123456", "group2", "westeurope")))
}

func (suite *ContextSuiteTest) TestSelectSubscriptionIdAndExistingResourceGroup() {
	ctx := context.TODO()
	opts := options("", "")
	sub1 := subModel("1234", "Subscription1")
	sub2 := subModel("5678", "Subscription2")

	suite.mockResourceGroupHeper.On("GetSubscriptionIDs", ctx).Return([]subscription.Model{sub1, sub2}, nil)

	selectOptions := []string{"Subscription1(1234)", "Subscription2(5678)"}
	suite.mockUserSelector.On("userSelect", "Select a subscription ID", selectOptions).Return(1, nil)
	selectOptions = []string{"create a new resource group", "group1 (eastus)", "group2 (westeurope)"}
	suite.mockUserSelector.On("userSelect", "Select a resource group", selectOptions).Return(2, nil)
	suite.mockResourceGroupHeper.On("ListGroups", ctx, "5678").Return([]resources.Group{
		group("group1", "eastus"),
		group("group2", "westeurope"),
	}, nil)

	data, description, err := suite.contextCreateHelper.createContextData(ctx, opts)

	Expect(err).To(BeNil())
	Expect(description).To(Equal("group2@westeurope"))
	Expect(data).To(Equal(aciContext("5678", "group2", "westeurope")))
}

func subModel(subID string, display string) subscription.Model {
	return subscription.Model{
		SubscriptionID: to.StringPtr(subID),
		DisplayName:    to.StringPtr(display),
	}
}

func group(groupName string, location string) resources.Group {
	return resources.Group{
		Name:     to.StringPtr(groupName),
		Location: to.StringPtr(location),
	}
}

func aciContext(subscriptionID string, resourceGroupName string, location string) store.AciContext {
	return store.AciContext{
		SubscriptionID: subscriptionID,
		Location:       location,
		ResourceGroup:  resourceGroupName,
	}
}

func options(subscriptionID string, resourceGroupName string) map[string]string {
	return map[string]string{
		"aciSubscriptionID": subscriptionID,
		"aciResourceGroup":  resourceGroupName,
	}
}

func TestContextSuite(t *testing.T) {
	RegisterTestingT(t)
	suite.Run(t, new(ContextSuiteTest))
}

type MockUserSelector struct {
	mock.Mock
}

func (s *MockUserSelector) userSelect(message string, options []string) (int, error) {
	args := s.Called(message, options)
	return args.Int(0), args.Error(1)
}

type MockResourceGroupHelper struct {
	mock.Mock
}

func (s *MockResourceGroupHelper) GetSubscriptionIDs(ctx context.Context) ([]subscription.Model, error) {
	args := s.Called(ctx)
	return args.Get(0).([]subscription.Model), args.Error(1)
}

func (s *MockResourceGroupHelper) ListGroups(ctx context.Context, subscriptionID string) ([]resources.Group, error) {
	args := s.Called(ctx, subscriptionID)
	return args.Get(0).([]resources.Group), args.Error(1)
}

func (s *MockResourceGroupHelper) GetGroup(ctx context.Context, subscriptionID string, groupName string) (resources.Group, error) {
	args := s.Called(ctx, subscriptionID, groupName)
	return args.Get(0).(resources.Group), args.Error(1)
}

func (s *MockResourceGroupHelper) CreateOrUpdate(ctx context.Context, subscriptionID string, resourceGroupName string, parameters resources.Group) (result resources.Group, err error) {
	args := s.Called(ctx, subscriptionID, resourceGroupName, parameters)
	return args.Get(0).(resources.Group), args.Error(1)
}

func (s *MockResourceGroupHelper) Delete(ctx context.Context, subscriptionID string, resourceGroupName string) (err error) {
	args := s.Called(ctx, subscriptionID, resourceGroupName)
	return args.Error(0)
}