package models

import (
	"fmt"
	"strconv"
	"strings"

	"gorm.io/gorm"
)

// InfraStatus is the status that an infrastructure can take
type InfraStatus string

// The allowed statuses
const (
	StatusCreating   InfraStatus = "creating"
	StatusCreated    InfraStatus = "created"
	StatusError      InfraStatus = "error"
	StatusDestroying InfraStatus = "destroying"
	StatusDestroyed  InfraStatus = "destroyed"
)

// InfraKind is the kind that infra can be
type InfraKind string

// The supported infra kinds
const (
	InfraTest InfraKind = "test"
	InfraECR  InfraKind = "ecr"
	InfraEKS  InfraKind = "eks"
	InfraGCR  InfraKind = "gcr"
	InfraGKE  InfraKind = "gke"
	InfraDOCR InfraKind = "docr"
	InfraDOKS InfraKind = "doks"
)

// Infra represents the metadata for an infrastructure type provisioned on
// Porter
type Infra struct {
	gorm.Model

	// The type of infra that was provisioned
	Kind InfraKind `json:"kind"`

	// A random 6-byte suffix to ensure workspace/stream ids are unique
	Suffix string

	// The project that this infra belongs to
	ProjectID uint `json:"project_id"`

	// Status is the status of the infra
	Status InfraStatus `json:"status"`

	// The AWS integration that was used to create the infra
	AWSIntegrationID uint

	// The GCP integration that was used to create the infra
	GCPIntegrationID uint

	// The DO integration that was used to create the infra:
	// this points to an OAuthIntegrationID
	DOIntegrationID uint

	// ------------------------------------------------------------------
	// All fields below this line are encrypted before storage
	// ------------------------------------------------------------------

	// The last-applied input variables to the provisioner
	LastApplied []byte
}

// InfraExternal is an external Infra to be shared over REST
type InfraExternal struct {
	ID uint `json:"id"`

	// The project that this integration belongs to
	ProjectID uint `json:"project_id"`

	// The type of infra that was provisioned
	Kind InfraKind `json:"kind"`

	// Status is the status of the infra
	Status InfraStatus `json:"status"`
}

// Externalize generates an external Infra to be shared over REST
func (i *Infra) Externalize() *InfraExternal {
	return &InfraExternal{
		ID:        i.ID,
		ProjectID: i.ProjectID,
		Kind:      i.Kind,
		Status:    i.Status,
	}
}

// GetID returns the unique id for this infra
func (i *Infra) GetUniqueName() string {
	return fmt.Sprintf("%s-%d-%d-%s", i.Kind, i.ProjectID, i.ID, i.Suffix)
}

// ParseUniqueName returns the (kind, projectID, infraID, suffix)
func ParseUniqueName(workspaceID string) (string, uint, uint, error) {
	strArr := strings.Split(workspaceID, "-")

	if len(strArr) < 3 {
		return "", 0, 0, fmt.Errorf("workspace id improperly formatted")
	}

	projID, err := strconv.ParseUint(strArr[1], 10, 64)

	if err != nil {
		return "", 0, 0, err
	}

	infraID, err := strconv.ParseUint(strArr[2], 10, 64)

	if err != nil {
		return "", 0, 0, err
	}

	return strArr[0], uint(projID), uint(infraID), nil
}