// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0

package main

import (
	"errors"
	"testing"
	"time"

	"github.com/aws/aws-sdk-go/service/cloudformation"
	"github.com/aws/aws-sdk-go/service/cloudformation/cloudformationiface"
)

// Define a mock struct to use in unit tests
type mockCFNClient struct {
	cloudformationiface.CloudFormationAPI
}

func (m *mockCFNClient) CreateStack(input *cloudformation.CreateStackInput) (*cloudformation.CreateStackOutput, error) {
	// Check that required inputs exist
	if input.StackName == nil || *input.StackName == "" || input.TemplateBody == nil || *input.TemplateBody == "" {
		return nil, errors.New("CreateStackInput.StackName or CreateStackInput.TemplateBody is nil or an empty string")
	}

	resp := cloudformation.CreateStackOutput{}
	return &resp, nil
}

func TestCreateStack(t *testing.T) {
	thisTime := time.Now()
	nowString := thisTime.Format("2006-01-02 15:04:05 Monday")
	t.Log("Starting unit test at " + nowString)

	// mock resource
	stackName := "test-stack"
	templateBody := "{}"

	mockSvc := &mockCFNClient{}

	err := MakeStack(mockSvc, &stackName, &templateBody)
	if err != nil {
		t.Fatal(err)
	}

	t.Log("Created stack " + stackName)
}
