package aws

import (
	"fmt"
	"log"
	"time"

	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/aws/awserr"
	"github.com/aws/aws-sdk-go/service/apigateway"
	"github.com/hashicorp/terraform/helper/resource"
	"github.com/hashicorp/terraform/helper/schema"
)

func resourceAwsApiGatewayApiKey() *schema.Resource {
	return &schema.Resource{
		Create: resourceAwsApiGatewayApiKeyCreate,
		Read:   resourceAwsApiGatewayApiKeyRead,
		Update: resourceAwsApiGatewayApiKeyUpdate,
		Delete: resourceAwsApiGatewayApiKeyDelete,

		Schema: map[string]*schema.Schema{
			"name": &schema.Schema{
				Type:     schema.TypeString,
				Required: true,
				ForceNew: true,
			},

			"description": &schema.Schema{
				Type:     schema.TypeString,
				Optional: true,
				Default:  "Managed by Terraform",
			},

			"enabled": &schema.Schema{
				Type:     schema.TypeBool,
				Optional: true,
				Default:  true,
			},

			"stage_key": &schema.Schema{
				Type:     schema.TypeSet,
				Optional: true,
				Elem: &schema.Resource{
					Schema: map[string]*schema.Schema{
						"rest_api_id": &schema.Schema{
							Type:     schema.TypeString,
							Required: true,
						},

						"stage_name": &schema.Schema{
							Type:     schema.TypeString,
							Required: true,
						},
					},
				},
			},
		},
	}
}

func resourceAwsApiGatewayApiKeyCreate(d *schema.ResourceData, meta interface{}) error {
	conn := meta.(*AWSClient).apigateway
	log.Printf("[DEBUG] Creating API Gateway API Key")

	apiKey, err := conn.CreateApiKey(&apigateway.CreateApiKeyInput{
		Name:        aws.String(d.Get("name").(string)),
		Description: aws.String(d.Get("description").(string)),
		Enabled:     aws.Bool(d.Get("enabled").(bool)),
		StageKeys:   expandApiGatewayStageKeys(d),
	})
	if err != nil {
		return fmt.Errorf("Error creating API Gateway: %s", err)
	}

	d.SetId(*apiKey.Id)

	return resourceAwsApiGatewayApiKeyRead(d, meta)
}

func resourceAwsApiGatewayApiKeyRead(d *schema.ResourceData, meta interface{}) error {
	conn := meta.(*AWSClient).apigateway
	log.Printf("[DEBUG] Reading API Gateway API Key: %s", d.Id())

	apiKey, err := conn.GetApiKey(&apigateway.GetApiKeyInput{
		ApiKey: aws.String(d.Id()),
	})
	if err != nil {
		if awsErr, ok := err.(awserr.Error); ok && awsErr.Code() == "NotFoundException" {
			d.SetId("")
			return nil
		}

		return err
	}

	d.Set("name", apiKey.Name)
	d.Set("description", apiKey.Description)
	d.Set("enabled", apiKey.Enabled)

	return nil
}

func resourceAwsApiGatewayApiKeyUpdateOperations(d *schema.ResourceData) []*apigateway.PatchOperation {
	operations := make([]*apigateway.PatchOperation, 0)
	if d.HasChange("enabled") {
		isEnabled := "false"
		if d.Get("enabled").(bool) {
			isEnabled = "true"
		}
		operations = append(operations, &apigateway.PatchOperation{
			Op:    aws.String("replace"),
			Path:  aws.String("/enabled"),
			Value: aws.String(isEnabled),
		})
	}

	if d.HasChange("description") {
		operations = append(operations, &apigateway.PatchOperation{
			Op:    aws.String("replace"),
			Path:  aws.String("/description"),
			Value: aws.String(d.Get("description").(string)),
		})
	}

	if d.HasChange("stage_key") {
		operations = append(operations, expandApiGatewayStageKeyOperations(d)...)
	}
	return operations
}

func resourceAwsApiGatewayApiKeyUpdate(d *schema.ResourceData, meta interface{}) error {
	conn := meta.(*AWSClient).apigateway

	log.Printf("[DEBUG] Updating API Gateway API Key: %s", d.Id())

	_, err := conn.UpdateApiKey(&apigateway.UpdateApiKeyInput{
		ApiKey:          aws.String(d.Id()),
		PatchOperations: resourceAwsApiGatewayApiKeyUpdateOperations(d),
	})
	if err != nil {
		return err
	}

	return resourceAwsApiGatewayApiKeyRead(d, meta)
}

func resourceAwsApiGatewayApiKeyDelete(d *schema.ResourceData, meta interface{}) error {
	conn := meta.(*AWSClient).apigateway
	log.Printf("[DEBUG] Deleting API Gateway API Key: %s", d.Id())

	return resource.Retry(5*time.Minute, func() *resource.RetryError {
		_, err := conn.DeleteApiKey(&apigateway.DeleteApiKeyInput{
			ApiKey: aws.String(d.Id()),
		})

		if err == nil {
			return nil
		}

		if apigatewayErr, ok := err.(awserr.Error); ok && apigatewayErr.Code() == "NotFoundException" {
			return nil
		}

		return resource.NonRetryableError(err)
	})
}