resource_routing_instance.go

package junos

import (
	"context"
	"fmt"
	"regexp"
	"strings"

	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/validation"
)

type instanceOptions struct {
	vrfTargetAuto      bool
	as                 string
	description        string
	instanceType       string
	name               string
	routeDistinguisher string
	vrfTarget          string
	vrfTargetExport    string
	vrfTargetImport    string
	vtepSourceIf       string
	vrfExport          []string
	vrfImport          []string
}

func resourceRoutingInstance() *schema.Resource {
	return &schema.Resource{
		CreateContext: resourceRoutingInstanceCreate,
		ReadContext:   resourceRoutingInstanceRead,
		UpdateContext: resourceRoutingInstanceUpdate,
		DeleteContext: resourceRoutingInstanceDelete,
		Importer: &schema.ResourceImporter{
			State: resourceRoutingInstanceImport,
		},
		Schema: map[string]*schema.Schema{
			"name": {
				Type:             schema.TypeString,
				ForceNew:         true,
				Required:         true,
				ValidateDiagFunc: validateNameObjectJunos([]string{"default"}, 64, formatDefault),
			},
			"configure_rd_vrfopts_singly": {
				Type:     schema.TypeBool,
				Optional: true,
				ForceNew: true,
				ConflictsWith: []string{
					"route_distinguisher",
					"vrf_export",
					"vrf_import",
					"vrf_target",
					"vrf_target_auto",
					"vrf_target_export",
					"vrf_target_import",
				},
			},
			"configure_type_singly": {
				Type:     schema.TypeBool,
				Optional: true,
				ForceNew: true,
			},
			"type": {
				Type:     schema.TypeString,
				Optional: true,
				Default:  "virtual-router",
			},
			"as": {
				Type:     schema.TypeString,
				Optional: true,
			},
			"description": {
				Type:     schema.TypeString,
				Optional: true,
			},
			"route_distinguisher": {
				Type:     schema.TypeString,
				Optional: true,
				ValidateFunc: validation.StringMatch(regexp.MustCompile(
					`^(\d|\.)+L?:\d+$`), "must have valid route distinguisher. Use format 'x:y'"),
			},
			"vrf_export": {
				Type:     schema.TypeList,
				Optional: true,
				Elem:     &schema.Schema{Type: schema.TypeString},
			},
			"vrf_import": {
				Type:     schema.TypeList,
				Optional: true,
				Elem:     &schema.Schema{Type: schema.TypeString},
			},
			"vrf_target": {
				Type:     schema.TypeString,
				Optional: true,
				ValidateFunc: validation.StringMatch(regexp.MustCompile(
					`^target:(\d|\.)+L?:\d+$`), "must have valid target. Use format 'target:x:y'"),
			},
			"vrf_target_auto": {
				Type:     schema.TypeBool,
				Optional: true,
			},
			"vrf_target_export": {
				Type:     schema.TypeString,
				Optional: true,
				ValidateFunc: validation.StringMatch(regexp.MustCompile(
					`^target:(\d|\.)+L?:\d+$`), "must have valid target. Use format 'target:x:y'"),
			},
			"vrf_target_import": {
				Type:     schema.TypeString,
				Optional: true,
				ValidateFunc: validation.StringMatch(regexp.MustCompile(
					`^target:(\d|\.)+L?:\d+$`), "must have valid target. Use format 'target:x:y'"),
			},
			"vtep_source_interface": {
				Type:     schema.TypeString,
				Optional: true,
				ValidateFunc: func(v interface{}, k string) (ws []string, errors []error) {
					value := v.(string)
					if strings.Count(value, ".") != 1 {
						errors = append(errors, fmt.Errorf(
							"%q in %q need to have 1 dot", value, k))
					}

					return
				},
			},
		},
	}
}

func resourceRoutingInstanceCreate(ctx context.Context, d *schema.ResourceData, m interface{}) diag.Diagnostics {
	sess := m.(*Session)
	if sess.junosFakeCreateSetFile != "" {
		if err := setRoutingInstance(d, m, nil); err != nil {
			return diag.FromErr(err)
		}
		d.SetId(d.Get("name").(string))

		return nil
	}
	jnprSess, err := sess.startNewSession()
	if err != nil {
		return diag.FromErr(err)
	}
	defer sess.closeSession(jnprSess)
	sess.configLock(jnprSess)
	var diagWarns diag.Diagnostics
	routingInstanceExists, err := checkRoutingInstanceExists(d.Get("name").(string), m, jnprSess)
	if err != nil {
		appendDiagWarns(&diagWarns, sess.configClear(jnprSess))

		return append(diagWarns, diag.FromErr(err)...)
	}
	if routingInstanceExists {
		appendDiagWarns(&diagWarns, sess.configClear(jnprSess))

		return append(diagWarns, diag.FromErr(fmt.Errorf("routing-instance %v already exists", d.Get("name").(string)))...)
	}
	if err := setRoutingInstance(d, m, jnprSess); err != nil {
		appendDiagWarns(&diagWarns, sess.configClear(jnprSess))

		return append(diagWarns, diag.FromErr(err)...)
	}
	warns, err := sess.commitConf("create resource junos_routing_instance", jnprSess)
	appendDiagWarns(&diagWarns, warns)
	if err != nil {
		appendDiagWarns(&diagWarns, sess.configClear(jnprSess))

		return append(diagWarns, diag.FromErr(err)...)
	}
	routingInstanceExists, err = checkRoutingInstanceExists(d.Get("name").(string), m, jnprSess)
	if err != nil {
		return append(diagWarns, diag.FromErr(err)...)
	}
	if routingInstanceExists {
		d.SetId(d.Get("name").(string))
	} else {
		return append(diagWarns, diag.FromErr(fmt.Errorf("routing-instance %v not exists after commit "+
			"=> check your config", d.Get("name").(string)))...)
	}

	return append(diagWarns, resourceRoutingInstanceReadWJnprSess(d, m, jnprSess)...)
}

func resourceRoutingInstanceRead(ctx context.Context, d *schema.ResourceData, m interface{}) diag.Diagnostics {
	sess := m.(*Session)
	jnprSess, err := sess.startNewSession()
	if err != nil {
		return diag.FromErr(err)
	}
	defer sess.closeSession(jnprSess)

	return resourceRoutingInstanceReadWJnprSess(d, m, jnprSess)
}

func resourceRoutingInstanceReadWJnprSess(
	d *schema.ResourceData, m interface{}, jnprSess *NetconfObject) diag.Diagnostics {
	mutex.Lock()
	instanceOptions, err := readRoutingInstance(d.Get("name").(string), m, jnprSess)
	mutex.Unlock()
	if err != nil {
		return diag.FromErr(err)
	}
	if instanceOptions.name == "" {
		d.SetId("")
	} else {
		fillRoutingInstanceData(d, instanceOptions)
	}

	return nil
}

func resourceRoutingInstanceUpdate(ctx context.Context, d *schema.ResourceData, m interface{}) diag.Diagnostics {
	d.Partial(true)
	sess := m.(*Session)
	jnprSess, err := sess.startNewSession()
	if err != nil {
		return diag.FromErr(err)
	}
	defer sess.closeSession(jnprSess)
	sess.configLock(jnprSess)
	var diagWarns diag.Diagnostics
	if err := delRoutingInstanceOpts(d, m, jnprSess); err != nil {
		appendDiagWarns(&diagWarns, sess.configClear(jnprSess))

		return append(diagWarns, diag.FromErr(err)...)
	}
	if err := setRoutingInstance(d, m, jnprSess); err != nil {
		appendDiagWarns(&diagWarns, sess.configClear(jnprSess))

		return append(diagWarns, diag.FromErr(err)...)
	}
	warns, err := sess.commitConf("update resource junos_routing_instance", jnprSess)
	appendDiagWarns(&diagWarns, warns)
	if err != nil {
		appendDiagWarns(&diagWarns, sess.configClear(jnprSess))

		return append(diagWarns, diag.FromErr(err)...)
	}
	d.Partial(false)

	return append(diagWarns, resourceRoutingInstanceReadWJnprSess(d, m, jnprSess)...)
}

func resourceRoutingInstanceDelete(ctx context.Context, d *schema.ResourceData, m interface{}) diag.Diagnostics {
	sess := m.(*Session)
	jnprSess, err := sess.startNewSession()
	if err != nil {
		return diag.FromErr(err)
	}
	defer sess.closeSession(jnprSess)
	sess.configLock(jnprSess)
	var diagWarns diag.Diagnostics
	if err := delRoutingInstance(d, m, jnprSess); err != nil {
		appendDiagWarns(&diagWarns, sess.configClear(jnprSess))

		return append(diagWarns, diag.FromErr(err)...)
	}
	warns, err := sess.commitConf("delete resource junos_routing_instance", jnprSess)
	appendDiagWarns(&diagWarns, warns)
	if err != nil {
		appendDiagWarns(&diagWarns, sess.configClear(jnprSess))

		return append(diagWarns, diag.FromErr(err)...)
	}

	return diagWarns
}

func resourceRoutingInstanceImport(d *schema.ResourceData, m interface{}) ([]*schema.ResourceData, error) {
	sess := m.(*Session)
	jnprSess, err := sess.startNewSession()
	if err != nil {
		return nil, err
	}
	defer sess.closeSession(jnprSess)
	result := make([]*schema.ResourceData, 1)
	routingInstanceExists, err := checkRoutingInstanceExists(d.Id(), m, jnprSess)
	if err != nil {
		return nil, err
	}
	if !routingInstanceExists {
		return nil, fmt.Errorf("don't find routing instance with id '%v' (id must be <name>)", d.Id())
	}
	instanceOptions, err := readRoutingInstance(d.Id(), m, jnprSess)
	if err != nil {
		return nil, err
	}
	fillRoutingInstanceData(d, instanceOptions)
	result[0] = d

	return result, nil
}

func checkRoutingInstanceExists(instance string, m interface{}, jnprSess *NetconfObject) (bool, error) {
	sess := m.(*Session)
	routingInstanceConfig, err := sess.command("show configuration routing-instances "+instance+" | display set", jnprSess)
	if err != nil {
		return false, err
	}
	if routingInstanceConfig == emptyWord {
		return false, nil
	}

	return true, nil
}

func setRoutingInstance(d *schema.ResourceData, m interface{}, jnprSess *NetconfObject) error {
	sess := m.(*Session)
	configSet := make([]string, 0)

	setPrefix := "set routing-instances " + d.Get("name").(string) + " "
	if d.Get("configure_type_singly").(bool) {
		if v := d.Get("type").(string); v != "" {
			return fmt.Errorf("if `configure_type_singly` = true, `type` need to be set to empty value to avoid confusion")
		}
	} else {
		if v := d.Get("type").(string); v != "" {
			configSet = append(configSet, setPrefix+"instance-type "+v)
		}
	}
	if !d.Get("configure_rd_vrfopts_singly").(bool) {
		if v := d.Get("route_distinguisher").(string); v != "" {
			configSet = append(configSet, setPrefix+"route-distinguisher "+v)
		}
		for _, v := range d.Get("vrf_export").([]interface{}) {
			configSet = append(configSet, setPrefix+"vrf-export \""+v.(string)+"\"")
		}
		for _, v := range d.Get("vrf_import").([]interface{}) {
			configSet = append(configSet, setPrefix+"vrf-import \""+v.(string)+"\"")
		}
		if v := d.Get("vrf_target").(string); v != "" {
			configSet = append(configSet, setPrefix+"vrf-target "+v)
		}
		if d.Get("vrf_target_auto").(bool) {
			configSet = append(configSet, setPrefix+"vrf-target auto")
		}
		if v := d.Get("vrf_target_export").(string); v != "" {
			configSet = append(configSet, setPrefix+"vrf-target export "+v)
		}
		if v := d.Get("vrf_target_import").(string); v != "" {
			configSet = append(configSet, setPrefix+"vrf-target import "+v)
		}
	}
	if v := d.Get("as").(string); v != "" {
		configSet = append(configSet, setPrefix+"routing-options autonomous-system "+v)
	}
	if v := d.Get("description").(string); v != "" {
		configSet = append(configSet, setPrefix+"description \""+v+"\"")
	}
	if v := d.Get("vtep_source_interface").(string); v != "" {
		configSet = append(configSet, setPrefix+"vtep-source-interface "+v)
	}

	return sess.configSet(configSet, jnprSess)
}

func readRoutingInstance(instance string, m interface{}, jnprSess *NetconfObject) (instanceOptions, error) {
	sess := m.(*Session)
	var confRead instanceOptions

	instanceConfig, err := sess.command("show configuration"+
		" routing-instances "+instance+" | display set relative", jnprSess)
	if err != nil {
		return confRead, err
	}
	if instanceConfig != emptyWord {
		confRead.name = instance
		for _, item := range strings.Split(instanceConfig, "\n") {
			if strings.Contains(item, "<configuration-output>") {
				continue
			}
			if strings.Contains(item, "</configuration-output>") {
				break
			}
			itemTrim := strings.TrimPrefix(item, setLineStart)
			switch {
			case strings.HasPrefix(itemTrim, "description "):
				confRead.description = strings.Trim(strings.TrimPrefix(itemTrim, "description "), "\"")
			case strings.HasPrefix(itemTrim, "instance-type "):
				confRead.instanceType = strings.TrimPrefix(itemTrim, "instance-type ")
			case strings.HasPrefix(itemTrim, "route-distinguisher "):
				confRead.routeDistinguisher = strings.TrimPrefix(itemTrim, "route-distinguisher ")
			case strings.HasPrefix(itemTrim, "routing-options autonomous-system "):
				confRead.as = strings.TrimPrefix(itemTrim, "routing-options autonomous-system ")
			case strings.HasPrefix(itemTrim, "vrf-export "):
				confRead.vrfExport = append(confRead.vrfExport, strings.Trim(strings.TrimPrefix(itemTrim, "vrf-export "), "\""))
			case strings.HasPrefix(itemTrim, "vrf-import "):
				confRead.vrfImport = append(confRead.vrfImport, strings.Trim(strings.TrimPrefix(itemTrim, "vrf-import "), "\""))
			case itemTrim == "vrf-target auto":
				confRead.vrfTargetAuto = true
			case strings.HasPrefix(itemTrim, "vrf-target export "):
				confRead.vrfTargetExport = strings.TrimPrefix(itemTrim, "vrf-target export ")
			case strings.HasPrefix(itemTrim, "vrf-target import "):
				confRead.vrfTargetImport = strings.TrimPrefix(itemTrim, "vrf-target import ")
			case strings.HasPrefix(itemTrim, "vrf-target "):
				confRead.vrfTarget = strings.TrimPrefix(itemTrim, "vrf-target ")
			case strings.HasPrefix(itemTrim, "vtep-source-interface "):
				confRead.vtepSourceIf = strings.TrimPrefix(itemTrim, "vtep-source-interface ")
			}
		}
	}

	return confRead, nil
}

func delRoutingInstanceOpts(d *schema.ResourceData, m interface{}, jnprSess *NetconfObject) error {
	sess := m.(*Session)
	configSet := make([]string, 0)
	setPrefix := "delete routing-instances " + d.Get("name").(string) + " "
	configSet = append(configSet,
		setPrefix+"description",
		setPrefix+"routing-options autonomous-system",
		setPrefix+"vtep-source-interface",
	)
	if !d.Get("configure_type_singly").(bool) {
		configSet = append(configSet, setPrefix+"instance-type")
	}
	if !d.Get("configure_rd_vrfopts_singly").(bool) {
		configSet = append(configSet,
			setPrefix+"route-distinguisher",
			setPrefix+"vrf-export",
			setPrefix+"vrf-import",
			setPrefix+"vrf_target",
		)
	}

	return sess.configSet(configSet, jnprSess)
}

func delRoutingInstance(d *schema.ResourceData, m interface{}, jnprSess *NetconfObject) error {
	sess := m.(*Session)
	configSet := make([]string, 0, 1)
	configSet = append(configSet, "delete routing-instances "+d.Get("name").(string))

	return sess.configSet(configSet, jnprSess)
}

func fillRoutingInstanceData(d *schema.ResourceData, instanceOptions instanceOptions) {
	if tfErr := d.Set("name", instanceOptions.name); tfErr != nil {
		panic(tfErr)
	}
	if tfErr := d.Set("as", instanceOptions.as); tfErr != nil {
		panic(tfErr)
	}
	if tfErr := d.Set("description", instanceOptions.description); tfErr != nil {
		panic(tfErr)
	}
	if tfErr := d.Set("vtep_source_interface", instanceOptions.vtepSourceIf); tfErr != nil {
		panic(tfErr)
	}
	if !d.Get("configure_type_singly").(bool) {
		if tfErr := d.Set("type", instanceOptions.instanceType); tfErr != nil {
			panic(tfErr)
		}
	}
	if !d.Get("configure_rd_vrfopts_singly").(bool) {
		if tfErr := d.Set("route_distinguisher", instanceOptions.routeDistinguisher); tfErr != nil {
			panic(tfErr)
		}
		if tfErr := d.Set("vrf_export", instanceOptions.vrfExport); tfErr != nil {
			panic(tfErr)
		}
		if tfErr := d.Set("vrf_import", instanceOptions.vrfImport); tfErr != nil {
			panic(tfErr)
		}
		if tfErr := d.Set("vrf_target", instanceOptions.vrfTarget); tfErr != nil {
			panic(tfErr)
		}
		if tfErr := d.Set("vrf_target_auto", instanceOptions.vrfTargetAuto); tfErr != nil {
			panic(tfErr)
		}
		if tfErr := d.Set("vrf_target_export", instanceOptions.vrfTargetExport); tfErr != nil {
			panic(tfErr)
		}
		if tfErr := d.Set("vrf_target_import", instanceOptions.vrfTargetImport); tfErr != nil {
			panic(tfErr)
		}
	}
}