// 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/aws"
	"github.com/aws/aws-sdk-go/service/ec2"
	"github.com/aws/aws-sdk-go/service/ec2/ec2iface"
)

// Define a mock struct to use in unit tests
type mockEC2Client struct {
	ec2iface.EC2API
}

func (m *mockEC2Client) CreateImage(input *ec2.CreateImageInput) (*ec2.CreateImageOutput, error) {
	// Check that required inputs exist
	if input.Name == nil || *input.Name == "" {
		return nil, errors.New("CreateImageInput.name is nil or an empty string")
	}

	resp := ec2.CreateImageOutput{
		ImageId: aws.String("test-image-id"),
	}
	return &resp, nil
}

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

	// mock resources
	imageDescription := "test-image-description"
	instanceID := "test-instance-ID"
	imageName := "test-image-name"

	mockSvc := &mockEC2Client{}

	resp, err := MakeImage(mockSvc, &imageDescription, &instanceID, &imageName)
	if err != nil {
		t.Fatal(err)
	}

	t.Log("Created image with ID: " + *resp.ImageId)
}
