package route53recoverycontrolconfig

import (
	"fmt"
	"log"

	"github.com/aws/aws-sdk-go/aws"
	r53rcc "github.com/aws/aws-sdk-go/service/route53recoverycontrolconfig"
	"github.com/hashicorp/aws-sdk-go-base/v2/awsv1shim/v2/tfawserr"
	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
	"github.com/hashicorp/terraform-provider-aws/internal/conns"
)

func ResourceCluster() *schema.Resource {
	return &schema.Resource{
		Create: resourceClusterCreate,
		Read:   resourceClusterRead,
		Delete: resourceClusterDelete,
		Importer: &schema.ResourceImporter{
			State: schema.ImportStatePassthrough,
		},

		Schema: map[string]*schema.Schema{
			"arn": {
				Type:     schema.TypeString,
				Computed: true,
			},
			"cluster_endpoints": {
				Type:     schema.TypeList,
				Computed: true,
				Elem: &schema.Resource{
					Schema: map[string]*schema.Schema{
						"endpoint": {
							Type:     schema.TypeString,
							Computed: true,
						},
						"region": {
							Type:     schema.TypeString,
							Computed: true,
						},
					},
				},
			},
			"name": {
				Type:     schema.TypeString,
				Required: true,
				ForceNew: true,
			},
			"status": {
				Type:     schema.TypeString,
				Computed: true,
			},
		},
	}
}

func resourceClusterCreate(d *schema.ResourceData, meta interface{}) error {
	conn := meta.(*conns.AWSClient).Route53RecoveryControlConfigConn()

	input := &r53rcc.CreateClusterInput{
		ClientToken: aws.String(resource.UniqueId()),
		ClusterName: aws.String(d.Get("name").(string)),
	}

	output, err := conn.CreateCluster(input)

	if err != nil {
		return fmt.Errorf("Error creating Route53 Recovery Control Config Cluster: %w", err)
	}

	if output == nil || output.Cluster == nil {
		return fmt.Errorf("Error creating Route53 Recovery Control Config Cluster: empty response")
	}

	result := output.Cluster
	d.SetId(aws.StringValue(result.ClusterArn))

	if _, err := waitClusterCreated(conn, d.Id()); err != nil {
		return fmt.Errorf("Error waiting for Route53 Recovery Control Config Cluster (%s) to be Deployed: %w", d.Id(), err)
	}

	return resourceClusterRead(d, meta)
}

func resourceClusterRead(d *schema.ResourceData, meta interface{}) error {
	conn := meta.(*conns.AWSClient).Route53RecoveryControlConfigConn()

	input := &r53rcc.DescribeClusterInput{
		ClusterArn: aws.String(d.Id()),
	}

	output, err := conn.DescribeCluster(input)

	if !d.IsNewResource() && tfawserr.ErrCodeEquals(err, r53rcc.ErrCodeResourceNotFoundException) {
		log.Printf("[WARN] Route53 Recovery Control Config Cluster (%s) not found, removing from state", d.Id())
		d.SetId("")
		return nil
	}

	if err != nil {
		return fmt.Errorf("Error describing Route53 Recovery Control Config Cluster: %s", err)
	}

	if output == nil || output.Cluster == nil {
		return fmt.Errorf("Error describing Route53 Recovery Control Config Cluster: %s", "empty response")
	}

	result := output.Cluster
	d.Set("arn", result.ClusterArn)
	d.Set("name", result.Name)
	d.Set("status", result.Status)

	if err := d.Set("cluster_endpoints", flattenClusterEndpoints(result.ClusterEndpoints)); err != nil {
		return fmt.Errorf("Error setting cluster_endpoints: %w", err)
	}

	return nil
}

func resourceClusterDelete(d *schema.ResourceData, meta interface{}) error {
	conn := meta.(*conns.AWSClient).Route53RecoveryControlConfigConn()

	log.Printf("[INFO] Deleting Route53 Recovery Control Config Cluster: %s", d.Id())
	_, err := conn.DeleteCluster(&r53rcc.DeleteClusterInput{
		ClusterArn: aws.String(d.Id()),
	})

	if tfawserr.ErrCodeEquals(err, r53rcc.ErrCodeResourceNotFoundException) {
		return nil
	}

	if err != nil {
		return fmt.Errorf("error deleting Route53 Recovery Control Config Cluster: %w", err)
	}

	_, err = waitClusterDeleted(conn, d.Id())

	if tfawserr.ErrCodeEquals(err, r53rcc.ErrCodeResourceNotFoundException) {
		return nil
	}

	if err != nil {
		return fmt.Errorf("Error waiting for Route53 Recovery Control Config  Cluster (%s) to be deleted: %w", d.Id(), err)
	}

	return nil
}

func flattenClusterEndpoints(endpoints []*r53rcc.ClusterEndpoint) []interface{} {
	if len(endpoints) == 0 {
		return nil
	}

	var tfList []interface{}

	for _, endpoint := range endpoints {
		if endpoint == nil {
			continue
		}

		tfList = append(tfList, flattenClusterEndpoint(endpoint))
	}

	return tfList
}

func flattenClusterEndpoint(ce *r53rcc.ClusterEndpoint) map[string]interface{} {
	if ce == nil {
		return nil
	}

	tfMap := map[string]interface{}{}

	if v := ce.Endpoint; v != nil {
		tfMap["endpoint"] = aws.StringValue(v)
	}

	if v := ce.Region; v != nil {
		tfMap["region"] = aws.StringValue(v)
	}

	return tfMap
}
