/*
Copyright (c) 2019-2021 Digital Energy Cloud Solutions LLC. All Rights Reserved.
Author: Petr Krutov, <petr.krutov@digitalenergy.online>

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

/*
This file is part of Terraform (by Hashicorp) provider for Digital Energy Cloud Orchestration
Technology platfom.

Visit https://github.com/rudecs/terraform-provider-decort for full source code package and updates.
*/

package decort

import (
	"fmt"
	"net/url"
	"strconv"

	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
	"github.com/hashicorp/terraform-plugin-sdk/helper/validation"
	log "github.com/sirupsen/logrus"
)

func resourcePfwCreate(d *schema.ResourceData, m interface{}) error {
	log.Debugf("resourcePfwCreate: called for compute %d", d.Get("compute_id").(int))

	controller := m.(*ControllerCfg)
	urlValues := &url.Values{}
	urlValues.Add("computeId", strconv.Itoa(d.Get("compute_id").(int)))
	urlValues.Add("publicPortStart", strconv.Itoa(d.Get("public_port_start").(int)))
	urlValues.Add("localBasePort", strconv.Itoa(d.Get("local_base_port").(int)))
	urlValues.Add("proto", d.Get("proto").(string))

	if portEnd, ok := d.GetOk("public_port_end"); ok {
		urlValues.Add("publicPortEnd", strconv.Itoa(portEnd.(int)))
	}

	pfwId, err := controller.decortAPICall("POST", ComputePfwAddAPI, urlValues)
	if err != nil {
		return err
	}

	d.SetId(fmt.Sprintf("%d-%s", d.Get("compute_id").(int), pfwId))

	pfw, err := utilityPfwCheckPresence(d, m)
	if err != nil {
		return err
	}

	d.Set("local_ip", pfw.LocalIP)
	if _, ok := d.GetOk("public_port_end"); !ok {
		d.Set("public_port_end", pfw.PublicPortEnd)
	}

	return nil
}

func resourcePfwRead(d *schema.ResourceData, m interface{}) error {
	log.Debugf("resourcePfwRead: called for compute %d, rule %s", d.Get("compute_id").(int), d.Id())

	pfw, err := utilityPfwCheckPresence(d, m)
	if pfw == nil {
		if err != nil {
			return err
		}
		return nil
	}

	d.Set("compute_id", pfw.ComputeID)
	d.Set("public_port_start", pfw.PublicPortStart)
	d.Set("public_port_end", pfw.PublicPortEnd)
	d.Set("local_ip", pfw.LocalIP)
	d.Set("local_base_port", pfw.LocalPort)
	d.Set("proto", pfw.Protocol)

	return nil
}

func resourcePfwDelete(d *schema.ResourceData, m interface{}) error {
	log.Debugf("resourcePfwDelete: called for compute %d, rule %s", d.Get("compute_id").(int), d.Id())

	pfw, err := utilityPfwCheckPresence(d, m)
	if pfw == nil {
		if err != nil {
			return err
		}
		return nil
	}

	controller := m.(*ControllerCfg)
	urlValues := &url.Values{}
	urlValues.Add("computeId", strconv.Itoa(d.Get("compute_id").(int)))
	urlValues.Add("ruleId", d.Id())

	_, err = controller.decortAPICall("POST", ComputePfwDelAPI, urlValues)
	if err != nil {
		return err
	}

	return nil
}

func resourcePfwExists(d *schema.ResourceData, m interface{}) (bool, error) {
	log.Debugf("resourcePfwExists: called for compute %d, rule %s", d.Get("compute_id").(int), d.Id())

	pfw, err := utilityPfwCheckPresence(d, m)
	if pfw == nil {
		if err != nil {
			return false, err
		}
		return false, nil
	}

	return true, nil
}

func resourcePfwSchemaMake() map[string]*schema.Schema {
	return map[string]*schema.Schema{
		"compute_id": {
			Type:        schema.TypeInt,
			Required:    true,
			ForceNew:    true,
			Description: "ID of compute instance.",
		},

		"public_port_start": {
			Type:         schema.TypeInt,
			Required:     true,
			ForceNew:     true,
			ValidateFunc: validation.IntBetween(1, 65535),
			Description:  "External start port number for the rule.",
		},

		"public_port_end": {
			Type:         schema.TypeInt,
			Optional:     true,
			ForceNew:     true,
			ValidateFunc: validation.IntBetween(1, 65535),
			Description:  "End port number (inclusive) for the ranged rule.",
		},

		"local_ip": {
			Type:        schema.TypeString,
			Computed:    true,
			Description: "IP address of compute instance.",
		},

		"local_base_port": {
			Type:         schema.TypeInt,
			Required:     true,
			ForceNew:     true,
			ValidateFunc: validation.IntBetween(1, 65535),
			Description:  "Internal base port number.",
		},

		"proto": {
			Type:         schema.TypeString,
			Required:     true,
			ForceNew:     true,
			ValidateFunc: validation.StringInSlice([]string{"tcp", "udp"}, false),
			Description:  "Network protocol, either 'tcp' or 'udp'.",
		},
	}
}

func resourcePfw() *schema.Resource {
	return &schema.Resource{
		SchemaVersion: 1,

		Create: resourcePfwCreate,
		Read:   resourcePfwRead,
		Delete: resourcePfwDelete,
		Exists: resourcePfwExists,

		Importer: &schema.ResourceImporter{
			State: schema.ImportStatePassthrough,
		},

		Timeouts: &schema.ResourceTimeout{
			Create:  &Timeout60s,
			Read:    &Timeout30s,
			Update:  &Timeout60s,
			Delete:  &Timeout60s,
			Default: &Timeout60s,
		},

		Schema: resourcePfwSchemaMake(),
	}
}